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PaddleOCR
“38b3ca47a9650f476879172051b01a935ff88dae”上不存在“git@gitcode.net:s920243400/PaddleOCR.git”
提交 f3447747 编写于 作者: L LDOUVLEV
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upload lite demo and clang-fomat

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Showing with 738 addition and 5525 deletion
.clang_format.hook 0 → 100644
浏览文件 @ f3447747
#!/bin/bash
set -e
readonly VERSION="3.8"
version=$(clang-format -version)
if ! [[ $version == *"$VERSION"* ]]; then
echo "clang-format version check failed."
echo "a version contains '$VERSION' is needed, but get '$version'"
echo "you can install the right version, and make an soft-link to '\$PATH' env"
exit -1
fi
clang-format $@
deploy/lite/Makefile
浏览文件 @ f3447747
...@@ -40,12 +40,28 @@ CXX_LIBS = ${OPENCV_LIBS} -L$(LITE_ROOT)/cxx/lib/ -lpaddle_light_api_shared $(SY ...@@ -40,12 +40,28 @@ CXX_LIBS = ${OPENCV_LIBS} -L$(LITE_ROOT)/cxx/lib/ -lpaddle_light_api_shared $(SY
#CXX_LIBS = $(LITE_ROOT)/cxx/lib/libpaddle_api_light_bundled.a $(SYSTEM_LIBS) #CXX_LIBS = $(LITE_ROOT)/cxx/lib/libpaddle_api_light_bundled.a $(SYSTEM_LIBS)
ocr_db_crnn: fetch_opencv ocr_db_crnn.o ocr_db_crnn: fetch_opencv ocr_db_crnn.o crnn_process.o db_post_process.o clipper.o
$(CC) $(SYSROOT_LINK) $(CXXFLAGS_LINK) ocr_db_crnn.o -o ocr_db_crnn $(CXX_LIBS) $(LDFLAGS) $(CC) $(SYSROOT_LINK) $(CXXFLAGS_LINK) ocr_db_crnn.o crnn_process.o db_post_process.o clipper.o -o ocr_db_crnn $(CXX_LIBS) $(LDFLAGS)
ocr_db_crnn.o: ocr_db_crnn.cc ocr_db_crnn.o: ocr_db_crnn.cc
$(CC) $(SYSROOT_COMPLILE) $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -o ocr_db_crnn.o -c ocr_db_crnn.cc $(CC) $(SYSROOT_COMPLILE) $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -o ocr_db_crnn.o -c ocr_db_crnn.cc
crnn_process.o: fetch_opencv crnn_process.cc
$(CC) $(SYSROOT_COMPLILE) $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -o crnn_process.o -c crnn_process.cc
db_post_process.o: fetch_clipper fetch_opencv db_post_process.cc
$(CC) $(SYSROOT_COMPLILE) $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -o db_post_process.o -c db_post_process.cc
clipper.o: fetch_clipper
$(CC) $(SYSROOT_COMPLILE) $(CXX_DEFINES) $(CXX_INCLUDES) $(CXX_FLAGS) -o clipper.o -c clipper.cpp
fetch_clipper:
@test -e clipper.hpp || \
( echo "Fetch clipper " && \
wget -c https://paddle-inference-dist.cdn.bcebos.com/PaddleLite/Clipper/clipper.hpp)
@ test -e clipper.cpp || \
wget -c https://paddle-inference-dist.cdn.bcebos.com/PaddleLite/Clipper/clipper.cpp
fetch_opencv: fetch_opencv:
@ test -d ${THIRD_PARTY_DIR} || mkdir ${THIRD_PARTY_DIR} @ test -d ${THIRD_PARTY_DIR} || mkdir ${THIRD_PARTY_DIR}
@ test -e ${THIRD_PARTY_DIR}/${OPENCV_VERSION}.tar.gz || \ @ test -e ${THIRD_PARTY_DIR}/${OPENCV_VERSION}.tar.gz || \
...@@ -57,5 +73,5 @@ fetch_opencv: ...@@ -57,5 +73,5 @@ fetch_opencv:
.PHONY: clean .PHONY: clean
clean: clean:
rm -f ocr_db_crnn.o rm -f ocr_db_crnn.o clipper.o db_post_process.o crnn_process.o
rm -f ocr_db_crnnn rm -f ocr_db_crnn
deploy/lite/config.txt 0 → 100644
浏览文件 @ f3447747
max_side_len 960
det_db_thresh 0.3
det_db_box_thresh 0.5
det_db_unclip_ratio 2.0
\ No newline at end of file
deploy/lite/utils/crnn_process.cpp → deploy/lite/crnn_process.cc
浏览文件 @ f3447747
...@@ -12,117 +12,110 @@ ...@@ -12,117 +12,110 @@
// See the License for the specific language governing permissions and // See the License for the specific language governing permissions and
// limitations under the License. // limitations under the License.
#include <iostream> #include "crnn_process.h" //NOLINT
#include <vector> #include <algorithm>
#include "opencv2/core.hpp" #include <memory>
#include "opencv2/imgcodecs.hpp" #include <string>
#include "opencv2/imgproc.hpp"
#include "math.h"
#include <iostream> const std::vector<int> rec_image_shape{3, 32, 320};
#include <cstring>
#include <fstream>
#define character_type "ch" cv::Mat CrnnResizeNormImg(cv::Mat img, float wh_ratio) {
#define max_dict_length 6624
const std::vector<int> rec_image_shape {3, 32, 320};
cv::Mat crnn_resize_norm_img(cv::Mat img, float wh_ratio){
int imgC, imgH, imgW; int imgC, imgH, imgW;
imgC = rec_image_shape[0]; imgC = rec_image_shape[0];
imgW = rec_image_shape[2]; imgW = rec_image_shape[2];
imgH = rec_image_shape[1]; imgH = rec_image_shape[1];
if (character_type=="ch") imgW = int(32 * wh_ratio);
imgW = int(32*wh_ratio);
float ratio = float(img.cols)/float(img.rows); float ratio = float(img.cols) / float(img.rows);
int resize_w, resize_h; int resize_w, resize_h;
if (ceilf(imgH*ratio)>imgW) if (ceilf(imgH * ratio) > imgW)
resize_w = imgW; resize_w = imgW;
else else
resize_w = int(ceilf(imgH*ratio)); resize_w = int(ceilf(imgH * ratio));
cv::Mat resize_img; cv::Mat resize_img;
cv::resize(img, resize_img, cv::Size(resize_w, imgH),0.f, 0.f, cv::INTER_CUBIC); cv::resize(
img, resize_img, cv::Size(resize_w, imgH), 0.f, 0.f, cv::INTER_CUBIC);
resize_img.convertTo(resize_img, CV_32FC3, 1 / 255.f); resize_img.convertTo(resize_img, CV_32FC3, 1 / 255.f);
for (int h=0; h< resize_img.rows; h++){ for (int h = 0; h < resize_img.rows; h++) {
for (int w=0; w< resize_img.cols; w++){ for (int w = 0; w < resize_img.cols; w++) {
resize_img.at<cv::Vec3f>(h, w)[0] = (resize_img.at<cv::Vec3f>(h, w)[0] - 0.5) *2; resize_img.at<cv::Vec3f>(h, w)[0] =
resize_img.at<cv::Vec3f>(h, w)[1] = (resize_img.at<cv::Vec3f>(h, w)[1] - 0.5) *2; (resize_img.at<cv::Vec3f>(h, w)[0] - 0.5) * 2;
resize_img.at<cv::Vec3f>(h, w)[2] = (resize_img.at<cv::Vec3f>(h, w)[2] - 0.5) *2; resize_img.at<cv::Vec3f>(h, w)[1] =
(resize_img.at<cv::Vec3f>(h, w)[1] - 0.5) * 2;
resize_img.at<cv::Vec3f>(h, w)[2] =
(resize_img.at<cv::Vec3f>(h, w)[2] - 0.5) * 2;
} }
} }
cv::Mat dist; cv::Mat dist;
cv::copyMakeBorder(resize_img, dist, 0, 0, 0, int(imgW-resize_w), cv::BORDER_CONSTANT, {0, 0, 0}); cv::copyMakeBorder(resize_img,
dist,
0,
0,
0,
int(imgW - resize_w),
cv::BORDER_CONSTANT,
{0, 0, 0});
return dist; return dist;
} }
cv::Mat crnn_resize_img(cv::Mat img, float wh_ratio){ cv::Mat CrnnResizeImg(cv::Mat img, float wh_ratio) {
int imgC, imgH, imgW; int imgC, imgH, imgW;
imgC = rec_image_shape[0]; imgC = rec_image_shape[0];
imgW = rec_image_shape[2]; imgW = rec_image_shape[2];
imgH = rec_image_shape[1]; imgH = rec_image_shape[1];
if (character_type=="ch") imgW = int(32 * wh_ratio);
imgW = int(32*wh_ratio);
float ratio = float(img.cols)/float(img.rows); float ratio = float(img.cols) / float(img.rows);
int resize_w, resize_h; int resize_w, resize_h;
if (ceilf(imgH*ratio)>imgW) if (ceilf(imgH * ratio) > imgW)
resize_w = imgW; resize_w = imgW;
else else
resize_w = int(ceilf(imgH*ratio)); resize_w = int(ceilf(imgH * ratio));
cv::Mat resize_img; cv::Mat resize_img;
cv::resize(img, resize_img, cv::Size(resize_w, imgH),0.f, 0.f, cv::INTER_LINEAR); cv::resize(
img, resize_img, cv::Size(resize_w, imgH), 0.f, 0.f, cv::INTER_LINEAR);
return resize_img; return resize_img;
} }
std::basic_string<char, std::char_traits<char>, std::allocator<char>> * read_dict(std::string path){ std::vector<std::string> ReadDict(std::string path) {
std::ifstream in(path);
std::ifstream ifs; std::string filename;
std::string charactors[max_dict_length]; std::string line;
std::vector<std::string> m_vec;
ifs.open(path); if (in) {
if (!ifs.is_open()) while (getline(in, line)) {
{ m_vec.push_back(line);
std::cout<<"open file "<<path<<" failed"<<std::endl;
} }
else } else {
{ std::cout << "no such file" << std::endl;
std::string con = "";
int count = 0;
while (ifs)
{
getline(ifs, charactors[count]);
count++;
} }
} return m_vec;
return charactors;
} }
cv::Mat get_rotate_crop_image(cv::Mat srcimage, std::vector<std::vector<int>> box){ cv::Mat GetRotateCropImage(cv::Mat srcimage,
std::vector<std::vector<int>> box) {
cv::Mat image; cv::Mat image;
srcimage.copyTo(image); srcimage.copyTo(image);
std::vector<std::vector<int>> points = box; std::vector<std::vector<int>> points = box;
int x_collect[4] = {box[0][0], box[1][0], box[2][0], box[3][0]}; int x_collect[4] = {box[0][0], box[1][0], box[2][0], box[3][0]};
int y_collect[4] = {box[0][1], box[1][1], box[2][1], box[3][1]}; int y_collect[4] = {box[0][1], box[1][1], box[2][1], box[3][1]};
int left = int(*std::min_element(x_collect, x_collect+4)); int left = int(*std::min_element(x_collect, x_collect + 4));
int right = int(*std::max_element(x_collect, x_collect+4)); int right = int(*std::max_element(x_collect, x_collect + 4));
int top = int(*std::min_element(y_collect, y_collect+4)); int top = int(*std::min_element(y_collect, y_collect + 4));
int bottom = int(*std::max_element(y_collect, y_collect+4)); int bottom = int(*std::max_element(y_collect, y_collect + 4));
cv::Mat img_crop; cv::Mat img_crop;
image(cv::Rect(left, top, right-left, bottom-top)).copyTo(img_crop); image(cv::Rect(left, top, right - left, bottom - top)).copyTo(img_crop);
for(int i=0; i<points.size(); i++){ for (int i = 0; i < points.size(); i++) {
points[i][0] -= left; points[i][0] -= left;
points[i][1] -= top; points[i][1] -= top;
} }
...@@ -147,22 +140,18 @@ cv::Mat get_rotate_crop_image(cv::Mat srcimage, std::vector<std::vector<int>> bo ...@@ -147,22 +140,18 @@ cv::Mat get_rotate_crop_image(cv::Mat srcimage, std::vector<std::vector<int>> bo
cv::Mat M = cv::getPerspectiveTransform(pointsf, pts_std); cv::Mat M = cv::getPerspectiveTransform(pointsf, pts_std);
cv::Mat dst_img; cv::Mat dst_img;
cv::warpPerspective(img_crop, dst_img, M, cv::Size(img_crop_width, img_crop_height), cv::BORDER_REPLICATE); cv::warpPerspective(img_crop,
dst_img,
M,
cv::Size(img_crop_width, img_crop_height),
cv::BORDER_REPLICATE);
if (float(dst_img.rows) >= float(dst_img.cols)*1.5){ if (float(dst_img.rows) >= float(dst_img.cols) * 1.5) {
cv::Mat srcCopy = cv::Mat(dst_img.rows, dst_img.cols, dst_img.depth()); cv::Mat srcCopy = cv::Mat(dst_img.rows, dst_img.cols, dst_img.depth());
cv::transpose(dst_img, srcCopy); cv::transpose(dst_img, srcCopy);
cv::flip(srcCopy, srcCopy, 0); cv::flip(srcCopy, srcCopy, 0);
return srcCopy; return srcCopy;
} } else {
else{
return dst_img; return dst_img;
} }
}
template<class ForwardIterator>
inline size_t argmax(ForwardIterator first, ForwardIterator last)
{
return std::distance(first, std::max_element(first, last));
} }
deploy/lite/crnn_process.h 0 → 100644
浏览文件 @ f3447747
// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#pragma once
#include <cstring>
#include <fstream>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include "math.h" //NOLINT
#include "opencv2/core.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/imgproc.hpp"
cv::Mat CrnnResizeNormImg(cv::Mat img, float wh_ratio);
cv::Mat CrnnResizeImg(cv::Mat img, float wh_ratio);
std::vector<std::string> ReadDict(std::string path);
cv::Mat GetRotateCropImage(cv::Mat srcimage, std::vector<std::vector<int>> box);
template <class ForwardIterator>
inline size_t Argmax(ForwardIterator first, ForwardIterator last) {
return std::distance(first, std::max_element(first, last));
}
deploy/lite/db_post_process.cc 0 → 100644
浏览文件 @ f3447747
// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "db_post_process.h" // NOLINT
#include <algorithm>
#include <utility>
void GetContourArea(std::vector<std::vector<float>> box,
float unclip_ratio,
float& distance) {
int pts_num = 4;
float area = 0.0f;
float dist = 0.0f;
for (int i = 0; i < pts_num; i++) {
area += box[i][0] * box[(i + 1) % pts_num][1] -
box[i][1] * box[(i + 1) % pts_num][0];
dist += sqrtf((box[i][0] - box[(i + 1) % pts_num][0]) *
(box[i][0] - box[(i + 1) % pts_num][0]) +
(box[i][1] - box[(i + 1) % pts_num][1]) *
(box[i][1] - box[(i + 1) % pts_num][1]));
}
area = fabs(float(area / 2.0));
distance = area * unclip_ratio / dist;
}
cv::RotatedRect Unclip(std::vector<std::vector<float>> box,
float unclip_ratio) {
float distance = 1.0;
GetContourArea(box, unclip_ratio, distance);
ClipperLib::ClipperOffset offset;
ClipperLib::Path p;
p << ClipperLib::IntPoint(int(box[0][0]), int(box[0][1]))
<< ClipperLib::IntPoint(int(box[1][0]), int(box[1][1]))
<< ClipperLib::IntPoint(int(box[2][0]), int(box[2][1]))
<< ClipperLib::IntPoint(int(box[3][0]), int(box[3][1]));
offset.AddPath(p, ClipperLib::jtRound, ClipperLib::etClosedPolygon);
ClipperLib::Paths soln;
offset.Execute(soln, distance);
std::vector<cv::Point2f> points;
for (int j = 0; j < soln.size(); j++) {
for (int i = 0; i < soln[soln.size() - 1].size(); i++) {
points.emplace_back(soln[j][i].X, soln[j][i].Y);
}
}
cv::RotatedRect res = cv::minAreaRect(points);
return res;
}
std::vector<std::vector<float>> Mat2Vector(cv::Mat mat) {
std::vector<std::vector<float>> img_vec;
std::vector<float> tmp;
for (int i = 0; i < mat.rows; ++i) {
tmp.clear();
for (int j = 0; j < mat.cols; ++j) {
tmp.push_back(mat.at<float>(i, j));
}
img_vec.push_back(tmp);
}
return img_vec;
}
bool XsortFp32(std::vector<float> a, std::vector<float> b) {
if (a[0] != b[0]) return a[0] < b[0];
return false;
}
bool XsortInt(std::vector<int> a, std::vector<int> b) {
if (a[0] != b[0]) return a[0] < b[0];
return false;
}
std::vector<std::vector<int>> OrderPointsClockwise(
std::vector<std::vector<int>> pts) {
std::vector<std::vector<int>> box = pts;
std::sort(box.begin(), box.end(), XsortInt);
std::vector<std::vector<int>> leftmost = {box[0], box[1]};
std::vector<std::vector<int>> rightmost = {box[2], box[3]};
if (leftmost[0][1] > leftmost[1][1]) std::swap(leftmost[0], leftmost[1]);
if (rightmost[0][1] > rightmost[1][1]) std::swap(rightmost[0], rightmost[1]);
std::vector<std::vector<int>> rect = {
leftmost[0], rightmost[0], rightmost[1], leftmost[1]};
return rect;
}
std::vector<std::vector<float>> GetMiniBoxes(cv::RotatedRect box, float& ssid) {
ssid = box.size.width >= box.size.height ? box.size.height : box.size.width;
cv::Mat points;
cv::boxPoints(box, points);
auto array = Mat2Vector(points);
std::sort(array.begin(), array.end(), XsortFp32);
std::vector<float> idx1 = array[0], idx2 = array[1], idx3 = array[2],
idx4 = array[3];
if (array[3][1] <= array[2][1]) {
idx2 = array[3];
idx3 = array[2];
} else {
idx2 = array[2];
idx3 = array[3];
}
if (array[1][1] <= array[0][1]) {
idx1 = array[1];
idx4 = array[0];
} else {
idx1 = array[0];
idx4 = array[1];
}
array[0] = idx1;
array[1] = idx2;
array[2] = idx3;
array[3] = idx4;
return array;
}
float BoxScoreFast(std::vector<std::vector<float>> box_array, cv::Mat pred) {
auto array = box_array;
int width = pred.cols;
int height = pred.rows;
float box_x[4] = {array[0][0], array[1][0], array[2][0], array[3][0]};
float box_y[4] = {array[0][1], array[1][1], array[2][1], array[3][1]};
int xmin = clamp(
int(std::floorf(*(std::min_element(box_x, box_x + 4)))), 0, width - 1);
int xmax = clamp(
int(std::ceilf(*(std::max_element(box_x, box_x + 4)))), 0, width - 1);
int ymin = clamp(
int(std::floorf(*(std::min_element(box_y, box_y + 4)))), 0, height - 1);
int ymax = clamp(
int(std::ceilf(*(std::max_element(box_y, box_y + 4)))), 0, height - 1);
cv::Mat mask;
mask = cv::Mat::zeros(ymax - ymin + 1, xmax - xmin + 1, CV_8UC1);
cv::Point root_point[4];
root_point[0] = cv::Point(int(array[0][0]) - xmin, int(array[0][1]) - ymin);
root_point[1] = cv::Point(int(array[1][0]) - xmin, int(array[1][1]) - ymin);
root_point[2] = cv::Point(int(array[2][0]) - xmin, int(array[2][1]) - ymin);
root_point[3] = cv::Point(int(array[3][0]) - xmin, int(array[3][1]) - ymin);
const cv::Point* ppt[1] = {root_point};
int npt[] = {4};
cv::fillPoly(mask, ppt, npt, 1, cv::Scalar(1));
cv::Mat croppedImg;
pred(cv::Rect(xmin, ymin, xmax - xmin + 1, ymax - ymin + 1))
.copyTo(croppedImg);
auto score = cv::mean(croppedImg, mask)[0];
return score;
}
std::vector<std::vector<std::vector<int>>> BoxesFromBitmap(
const cv::Mat pred,
const cv::Mat bitmap,
std::map<std::string, double> Config) {
const int min_size = 3;
const int max_candidates = 1000;
const float box_thresh = float(Config["det_db_box_thresh"]);
const float unclip_ratio = float(Config["det_db_unclip_ratio"]);
int width = bitmap.cols;
int height = bitmap.rows;
std::vector<std::vector<cv::Point>> contours;
std::vector<cv::Vec4i> hierarchy;
cv::findContours(
bitmap, contours, hierarchy, cv::RETR_LIST, cv::CHAIN_APPROX_SIMPLE);
int num_contours =
contours.size() >= max_candidates ? max_candidates : contours.size();
std::vector<std::vector<std::vector<int>>> boxes;
for (int i = 0; i < num_contours; i++) {
float ssid;
cv::RotatedRect box = cv::minAreaRect(contours[i]);
auto array = GetMiniBoxes(box, ssid);
auto box_for_unclip = array;
// end get_mini_box
if (ssid < min_size) {
continue;
}
float score;
score = BoxScoreFast(array, pred);
// end box_score_fast
if (score < box_thresh) continue;
// start for unclip
cv::RotatedRect points = Unclip(box_for_unclip, unclip_ratio);
// end for unclip
cv::RotatedRect clipbox = points;
auto cliparray = GetMiniBoxes(clipbox, ssid);
if (ssid < min_size + 2) continue;
int dest_width = pred.cols;
int dest_height = pred.rows;
std::vector<std::vector<int>> intcliparray;
for (int num_pt = 0; num_pt < 4; num_pt++) {
std::vector<int> a{
int(clamp(
roundf(cliparray[num_pt][0] / float(width) * float(dest_width)),
float(0),
float(dest_width))),
int(clamp(
roundf(cliparray[num_pt][1] / float(height) * float(dest_height)),
float(0),
float(dest_height)))};
intcliparray.push_back(a);
}
boxes.push_back(intcliparray);
} // end for
return boxes;
}
std::vector<std::vector<std::vector<int>>> FilterTagDetRes(
std::vector<std::vector<std::vector<int>>> boxes,
float ratio_h,
float ratio_w,
cv::Mat srcimg) {
int oriimg_h = srcimg.rows;
int oriimg_w = srcimg.cols;
std::vector<std::vector<std::vector<int>>> root_points;
for (int n = 0; n < boxes.size(); n++) {
boxes[n] = OrderPointsClockwise(boxes[n]);
for (int m = 0; m < boxes[0].size(); m++) {
boxes[n][m][0] /= ratio_w;
boxes[n][m][1] /= ratio_h;
boxes[n][m][0] = int(std::min(std::max(boxes[n][m][0], 0), oriimg_w - 1));
boxes[n][m][1] = int(std::min(std::max(boxes[n][m][1], 0), oriimg_h - 1));
}
}
for (int n = 0; n < boxes.size(); n++) {
int rect_width, rect_height;
rect_width = int(sqrt(pow(boxes[n][0][0] - boxes[n][1][0], 2) +
pow(boxes[n][0][1] - boxes[n][1][1], 2)));
rect_height = int(sqrt(pow(boxes[n][0][0] - boxes[n][3][0], 2) +
pow(boxes[n][0][1] - boxes[n][3][1], 2)));
if (rect_width <= 10 || rect_height <= 10) continue;
root_points.push_back(boxes[n]);
}
return root_points;
}
\ No newline at end of file
deploy/lite/db_post_process.h 0 → 100644
浏览文件 @ f3447747
// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#pragma once
#include <math.h>
#include <iostream>
#include <map>
#include <vector>
#include "opencv2/core.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/imgproc.hpp"
#include "utils/clipper.hpp"
template <class T>
T clamp(T x, T min, T max) {
if (x > max) return max;
if (x < min) return min;
return x;
}
std::vector<std::vector<float>> Mat2Vector(cv::Mat mat);
void GetContourArea(std::vector<std::vector<float>> box,
float unclip_ratio,
float &distance);
cv::RotatedRect Unclip(std::vector<std::vector<float>> box, float unclip_ratio);
std::vector<std::vector<float>> Mat2Vector(cv::Mat mat);
bool XsortFp32(std::vector<float> a, std::vector<float> b);
bool XsortInt(std::vector<int> a, std::vector<int> b);
std::vector<std::vector<int>> OrderPointsClockwise(
std::vector<std::vector<int>> pts);
std::vector<std::vector<float>> GetMiniBoxes(cv::RotatedRect box, float &ssid);
float BoxScoreFast(std::vector<std::vector<float>> box_array, cv::Mat pred);
std::vector<std::vector<std::vector<int>>> BoxesFromBitmap(
const cv::Mat pred,
const cv::Mat bitmap,
std::map<std::string, double> Config);
std::vector<std::vector<std::vector<int>>> FilterTagDetRes(
std::vector<std::vector<std::vector<int>>> boxes,
float ratio_h,
float ratio_w,
cv::Mat srcimg);
deploy/lite/ocr_db_crnn.cc
浏览文件 @ f3447747
// Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved. // Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
// //
// Licensed under the Apache License, Version 2.0 (the "License"); // Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License. // you may not use this file except in compliance with the License.
...@@ -12,32 +12,14 @@ ...@@ -12,32 +12,14 @@
// See the License for the specific language governing permissions and // See the License for the specific language governing permissions and
// limitations under the License. // limitations under the License.
#include <iostream>
#include <vector>
#include <chrono> #include <chrono>
#include "opencv2/core.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/imgproc.hpp"
#include "paddle_api.h" // NOLINT #include "paddle_api.h" // NOLINT
#include "utils/db_post_process.cpp" #include "crnn_process.h"
#include "utils/crnn_process.cpp" #include "db_post_process.h"
#include <cstring>
#include <fstream>
using namespace paddle::lite_api; // NOLINT using namespace paddle::lite_api; // NOLINT
using namespace std;
struct Object {
cv::Rect rec;
int class_id;
float prob;
};
int64_t ShapeProduction(const shape_t& shape) {
int64_t res = 1;
for (auto i : shape) res *= i;
return res;
}
// fill tensor with mean and scale and trans layout: nhwc -> nchw, neon speed up // fill tensor with mean and scale and trans layout: nhwc -> nchw, neon speed up
void neon_mean_scale(const float* din, void neon_mean_scale(const float* din,
...@@ -86,14 +68,16 @@ void neon_mean_scale(const float* din, ...@@ -86,14 +68,16 @@ void neon_mean_scale(const float* din,
} }
// resize image to a size multiple of 32 which is required by the network // resize image to a size multiple of 32 which is required by the network
cv::Mat resize_img_type0(const cv::Mat img, int max_size_len, float *ratio_h, float *ratio_w){ cv::Mat DetResizeImg(const cv::Mat img,
int max_size_len,
std::vector<float>& ratio_hw) {
int w = img.cols; int w = img.cols;
int h = img.rows; int h = img.rows;
float ratio = 1.f; float ratio = 1.f;
int max_wh = w >=h ? w : h; int max_wh = w >= h ? w : h;
if (max_wh > max_size_len){ if (max_wh > max_size_len) {
if (h > w){ if (h > w) {
ratio = float(max_size_len) / float(h); ratio = float(max_size_len) / float(h);
} else { } else {
ratio = float(max_size_len) / float(w); ratio = float(max_size_len) / float(w);
...@@ -104,36 +88,32 @@ cv::Mat resize_img_type0(const cv::Mat img, int max_size_len, float *ratio_h, fl ...@@ -104,36 +88,32 @@ cv::Mat resize_img_type0(const cv::Mat img, int max_size_len, float *ratio_h, fl
int resize_w = int(float(w) * ratio); int resize_w = int(float(w) * ratio);
if (resize_h % 32 == 0) if (resize_h % 32 == 0)
resize_h = resize_h; resize_h = resize_h;
else if (resize_h / 32 < 1) else if (resize_h / 32 < 1 + 1e-5)
resize_h = 32; resize_h = 32;
else else
resize_h = (resize_h / 32 - 1) * 32; resize_h = (resize_h / 32 - 1) * 32;
if (resize_w % 32 == 0) if (resize_w % 32 == 0)
resize_w = resize_w; resize_w = resize_w;
else if (resize_w /32 < 1) else if (resize_w / 32 < 1 + 1e-5)
resize_w = 32; resize_w = 32;
else else
resize_w = (resize_w/32 - 1)*32; resize_w = (resize_w / 32 - 1) * 32;
cv::Mat resize_img; cv::Mat resize_img;
cv::resize(img, resize_img, cv::Size(resize_w, resize_h)); cv::resize(img, resize_img, cv::Size(resize_w, resize_h));
*ratio_h = float(resize_h) / float(h); ratio_hw.push_back(float(resize_h) / float(h));
*ratio_w = float(resize_w) / float(w); ratio_hw.push_back(float(resize_w) / float(w));
return resize_img; return resize_img;
} }
using namespace std; void RunRecModel(std::vector<std::vector<std::vector<int>>> boxes,
cv::Mat img,
void RunRecModel(std::vector<std::vector<std::vector<int>>> boxes, cv::Mat img, std::string rec_model_file){ std::shared_ptr<PaddlePredictor> predictor_crnn,
std::string dict_path,
MobileConfig config; std::vector<std::string>& rec_text,
config.set_model_from_file(rec_model_file); std::vector<float>& rec_text_score) {
std::shared_ptr<PaddlePredictor> predictor_crnn =
CreatePaddlePredictor<MobileConfig>(config);
std::vector<float> mean = {0.5f, 0.5f, 0.5f}; std::vector<float> mean = {0.5f, 0.5f, 0.5f};
std::vector<float> scale = {1 / 0.5f, 1 / 0.5f, 1 / 0.5f}; std::vector<float> scale = {1 / 0.5f, 1 / 0.5f, 1 / 0.5f};
...@@ -142,56 +122,55 @@ void RunRecModel(std::vector<std::vector<std::vector<int>>> boxes, cv::Mat img, ...@@ -142,56 +122,55 @@ void RunRecModel(std::vector<std::vector<std::vector<int>>> boxes, cv::Mat img,
cv::Mat crop_img; cv::Mat crop_img;
cv::Mat resize_img; cv::Mat resize_img;
std::string dict_path = "./ppocr_keys_v1.txt"; auto charactor_dict = ReadDict(dict_path);
auto charactor_dict = read_dict(dict_path);
std::cout << "The predicted text is :" << std::endl;
int index = 0; int index = 0;
for (int i=boxes.size()-1; i >= 0; i--) { for (int i = boxes.size() - 1; i >= 0; i--) {
crop_img = get_rotate_crop_image(srcimg, boxes[i]); crop_img = GetRotateCropImage(srcimg, boxes[i]);
float wh_ratio = float(crop_img.cols) / float(crop_img.rows); float wh_ratio = float(crop_img.cols) / float(crop_img.rows);
resize_img = crnn_resize_img(crop_img, wh_ratio); resize_img = CrnnResizeImg(crop_img, wh_ratio);
resize_img.convertTo(resize_img, CV_32FC3, 1 / 255.f); resize_img.convertTo(resize_img, CV_32FC3, 1 / 255.f);
const float *dimg = reinterpret_cast<const float *>(resize_img.data); const float* dimg = reinterpret_cast<const float*>(resize_img.data);
std::unique_ptr <Tensor> input_tensor0(std::move(predictor_crnn->GetInput(0))); std::unique_ptr<Tensor> input_tensor0(
std::move(predictor_crnn->GetInput(0)));
input_tensor0->Resize({1, 3, resize_img.rows, resize_img.cols}); input_tensor0->Resize({1, 3, resize_img.rows, resize_img.cols});
auto *data0 = input_tensor0->mutable_data<float>(); auto* data0 = input_tensor0->mutable_data<float>();
neon_mean_scale(dimg, data0, resize_img.rows * resize_img.cols, mean, scale);
neon_mean_scale(
dimg, data0, resize_img.rows * resize_img.cols, mean, scale);
//// Run CRNN predictor //// Run CRNN predictor
predictor_crnn->Run(); predictor_crnn->Run();
// Get output and run postprocess // Get output and run postprocess
std::unique_ptr<const Tensor> output_tensor0( std::unique_ptr<const Tensor> output_tensor0(
std::move(predictor_crnn->GetOutput(0))); std::move(predictor_crnn->GetOutput(0)));
auto *rec_idx = output_tensor0->data<int>(); auto* rec_idx = output_tensor0->data<int>();
auto rec_idx_lod = output_tensor0->lod(); auto rec_idx_lod = output_tensor0->lod();
auto shape_out = output_tensor0->shape(); auto shape_out = output_tensor0->shape();
std::vector<int> pred_idx; std::vector<int> pred_idx;
for (int n = int(rec_idx_lod[0][0]); n < int(rec_idx_lod[0][1] * 2); n += 2) { for (int n = int(rec_idx_lod[0][0]); n < int(rec_idx_lod[0][1] * 2);
n += 2) {
pred_idx.push_back(int(rec_idx[n])); pred_idx.push_back(int(rec_idx[n]));
} }
if (pred_idx.size() < 1e-3) if (pred_idx.size() < 1e-3) continue;
continue;
std::cout << std::endl;
index += 1; index += 1;
std::cout << index << "\t"; std::string pred_txt = "";
for (int n = 0; n < pred_idx.size(); n++) { for (int n = 0; n < pred_idx.size(); n++) {
std::cout << charactor_dict[pred_idx[n]]; pred_txt += charactor_dict[pred_idx[n]];
} }
rec_text.push_back(pred_txt);
////get score ////get score
std::unique_ptr<const Tensor> output_tensor1(std::move(predictor_crnn->GetOutput(1))); std::unique_ptr<const Tensor> output_tensor1(
auto *predict_batch = output_tensor1->data<float>(); std::move(predictor_crnn->GetOutput(1)));
auto* predict_batch = output_tensor1->data<float>();
auto predict_shape = output_tensor1->shape(); auto predict_shape = output_tensor1->shape();
auto predict_lod = output_tensor1->lod(); auto predict_lod = output_tensor1->lod();
...@@ -203,38 +182,34 @@ void RunRecModel(std::vector<std::vector<std::vector<int>>> boxes, cv::Mat img, ...@@ -203,38 +182,34 @@ void RunRecModel(std::vector<std::vector<std::vector<int>>> boxes, cv::Mat img,
float max_value = 0.0f; float max_value = 0.0f;
for (int n = predict_lod[0][0]; n < predict_lod[0][1] - 1; n++) { for (int n = predict_lod[0][0]; n < predict_lod[0][1] - 1; n++) {
argmax_idx = int(argmax(&predict_batch[n * predict_shape[1]], &predict_batch[(n + 1) * predict_shape[1]])); argmax_idx = int(Argmax(&predict_batch[n * predict_shape[1]],
max_value = float( &predict_batch[(n + 1) * predict_shape[1]]));
*std::max_element(&predict_batch[n * predict_shape[1]], &predict_batch[(n + 1) * predict_shape[1]])); max_value =
float(*std::max_element(&predict_batch[n * predict_shape[1]],
&predict_batch[(n + 1) * predict_shape[1]]));
if (blank - 1 - argmax_idx > 1e-5) { if (blank - 1 - argmax_idx > 1e-5) {
score += max_value; score += max_value;
count += 1; count += 1;
} }
} }
score /= count; score /= count;
std::cout << "\tscore: " << score << std::endl; rec_text_score.push_back(score);
} }
} }
std::vector<std::vector<std::vector<int>>> RunDetModel(std::string model_file, cv::Mat img) { std::vector<std::vector<std::vector<int>>> RunDetModel(
// Set MobileConfig std::shared_ptr<PaddlePredictor> predictor,
MobileConfig config; cv::Mat img,
config.set_model_from_file(model_file); std::map<std::string, double> Config) {
std::shared_ptr<PaddlePredictor> predictor =
CreatePaddlePredictor<MobileConfig>(config);
// Read img // Read img
int max_side_len = 960; int max_side_len = int(Config["max_side_len"]);
float ratio_h{};
float ratio_w{};
cv::Mat srcimg; cv::Mat srcimg;
img.copyTo(srcimg); img.copyTo(srcimg);
img = resize_img_type0(img, max_side_len, &ratio_h, &ratio_w); std::vector<float> ratio_hw;
img = DetResizeImg(img, max_side_len, ratio_hw);
cv::Mat img_fp; cv::Mat img_fp;
img.convertTo(img_fp, CV_32FC3, 1.0 / 255.f); img.convertTo(img_fp, CV_32FC3, 1.0 / 255.f);
...@@ -244,7 +219,7 @@ std::vector<std::vector<std::vector<int>>> RunDetModel(std::string model_file, c ...@@ -244,7 +219,7 @@ std::vector<std::vector<std::vector<int>>> RunDetModel(std::string model_file, c
auto* data0 = input_tensor0->mutable_data<float>(); auto* data0 = input_tensor0->mutable_data<float>();
std::vector<float> mean = {0.485f, 0.456f, 0.406f}; std::vector<float> mean = {0.485f, 0.456f, 0.406f};
std::vector<float> scale = {1/0.229f, 1/0.224f, 1/0.225f}; std::vector<float> scale = {1 / 0.229f, 1 / 0.224f, 1 / 0.225f};
const float* dimg = reinterpret_cast<const float*>(img_fp.data); const float* dimg = reinterpret_cast<const float*>(img_fp.data);
neon_mean_scale(dimg, data0, img_fp.rows * img_fp.cols, mean, scale); neon_mean_scale(dimg, data0, img_fp.rows * img_fp.cols, mean, scale);
...@@ -252,7 +227,8 @@ std::vector<std::vector<std::vector<int>>> RunDetModel(std::string model_file, c ...@@ -252,7 +227,8 @@ std::vector<std::vector<std::vector<int>>> RunDetModel(std::string model_file, c
predictor->Run(); predictor->Run();
// Get output and post process // Get output and post process
std::unique_ptr<const Tensor> output_tensor(std::move(predictor->GetOutput(0))); std::unique_ptr<const Tensor> output_tensor(
std::move(predictor->GetOutput(0)));
auto* outptr = output_tensor->data<float>(); auto* outptr = output_tensor->data<float>();
auto shape_out = output_tensor->shape(); auto shape_out = output_tensor->shape();
...@@ -266,68 +242,135 @@ std::vector<std::vector<std::vector<int>>> RunDetModel(std::string model_file, c ...@@ -266,68 +242,135 @@ std::vector<std::vector<std::vector<int>>> RunDetModel(std::string model_file, c
float pred[shape_out[2]][shape_out[3]]; float pred[shape_out[2]][shape_out[3]];
unsigned char cbuf[shape_out[2]][shape_out[3]]; unsigned char cbuf[shape_out[2]][shape_out[3]];
for (int i=0; i< int(shape_out[2]*shape_out[3]); i++){ for (int i = 0; i < int(shape_out[2] * shape_out[3]); i++) {
pred[int(i/int(shape_out[3]))][int(i%shape_out[3])] = float(outptr[i]); pred[int(i / int(shape_out[3]))][int(i % shape_out[3])] = float(outptr[i]);
cbuf[int(i/int(shape_out[3]))][int(i%shape_out[3])] = (unsigned char) ((outptr[i])*255); cbuf[int(i / int(shape_out[3]))][int(i % shape_out[3])] =
(unsigned char)((outptr[i]) * 255);
} }
cv::Mat cbuf_map(shape_out[2], shape_out[3], CV_8UC1, (unsigned char*)cbuf); cv::Mat cbuf_map(shape_out[2], shape_out[3], CV_8UC1, (unsigned char*)cbuf);
cv::Mat pred_map(shape_out[2], shape_out[3], CV_32F, (float *)pred); cv::Mat pred_map(shape_out[2], shape_out[3], CV_32F, (float*)pred);
const double threshold = 0.3*255; const double threshold = double(Config["det_db_thresh"]) * 255;
const double maxvalue = 255; const double maxvalue = 255;
cv::Mat bit_map; cv::Mat bit_map;
cv::threshold(cbuf_map, bit_map, threshold, maxvalue, cv::THRESH_BINARY); cv::threshold(cbuf_map, bit_map, threshold, maxvalue, cv::THRESH_BINARY);
auto boxes = boxes_from_bitmap(pred_map, bit_map); auto boxes = BoxesFromBitmap(pred_map, bit_map, Config);
std::vector<std::vector<std::vector<int>>> filter_boxes = filter_tag_det_res(boxes, ratio_h, ratio_w, srcimg); std::vector<std::vector<std::vector<int>>> filter_boxes =
FilterTagDetRes(boxes, ratio_hw[0], ratio_hw[1], srcimg);
//// visualization return filter_boxes;
cv::Point rook_points[filter_boxes.size()][4]; }
for (int n=0; n<filter_boxes.size(); n++){
for (int m=0; m< filter_boxes[0].size(); m++){ std::shared_ptr<PaddlePredictor> loadModel(std::string model_file) {
rook_points[n][m] = cv::Point(int(filter_boxes[n][m][0]), int(filter_boxes[n][m][1])); MobileConfig config;
config.set_model_from_file(model_file);
std::shared_ptr<PaddlePredictor> predictor =
CreatePaddlePredictor<MobileConfig>(config);
return predictor;
}
cv::Mat Visualization(cv::Mat srcimg,
std::vector<std::vector<std::vector<int>>> boxes) {
cv::Point rook_points[boxes.size()][4];
for (int n = 0; n < boxes.size(); n++) {
for (int m = 0; m < boxes[0].size(); m++) {
rook_points[n][m] = cv::Point(int(boxes[n][m][0]), int(boxes[n][m][1]));
} }
} }
cv::Mat img_vis; cv::Mat img_vis;
srcimg.copyTo(img_vis); srcimg.copyTo(img_vis);
for (int n=0; n<boxes.size(); n++){ for (int n = 0; n < boxes.size(); n++) {
const cv::Point* ppt[1] = { rook_points[n] }; const cv::Point* ppt[1] = {rook_points[n]};
int npt[] = { 4 }; int npt[] = {4};
cv::polylines(img_vis, ppt, npt,1,1,CV_RGB(0,255,0),2,8,0); cv::polylines(img_vis, ppt, npt, 1, 1, CV_RGB(0, 255, 0), 2, 8, 0);
} }
cv::imwrite("./imgs_vis/vis.jpg", img_vis); cv::imwrite("./imgs/vis.jpg", img_vis);
std::cout << "The detection visualized image saved in ./imgs_vis/" <<std::endl; std::cout << "The detection visualized image saved in ./imgs/vis.jpg"
<< std::endl;
return img_vis;
}
std::vector<std::string> split(const std::string& str,
const std::string& delim) {
std::vector<std::string> res;
if ("" == str) return res;
char* strs = new char[str.length() + 1];
std::strcpy(strs, str.c_str());
char* d = new char[delim.length() + 1];
std::strcpy(d, delim.c_str());
char* p = std::strtok(strs, d);
while (p) {
string s = p;
res.push_back(s);
p = std::strtok(NULL, d);
}
return filter_boxes; return res;
} }
std::map<std::string, double> LoadConfigTxt(std::string config_path) {
auto config = ReadDict(config_path);
std::map<std::string, double> dict;
for (int i = 0; i < config.size(); i++) {
std::vector<std::string> res = split(config[i], " ");
dict[res[0]] = stod(res[1]);
}
return dict;
}
int main(int argc, char** argv) { int main(int argc, char** argv) {
if (argc < 4) { if (argc < 5) {
std::cerr << "[ERROR] usage: " << argv[0] << " det_model_file rec_model_file image_path\n"; std::cerr << "[ERROR] usage: " << argv[0]
<< " det_model_file rec_model_file image_path\n";
exit(1); exit(1);
} }
std::string det_model_file = argv[1]; std::string det_model_file = argv[1];
std::string rec_model_file = argv[2]; std::string rec_model_file = argv[2];
std::string img_path = argv[3]; std::string img_path = argv[3];
std::string dict_path = argv[4];
//// load config from txt file
auto Config = LoadConfigTxt("./config.txt");
auto start = std::chrono::system_clock::now(); auto start = std::chrono::system_clock::now();
auto det_predictor = loadModel(det_model_file);
auto rec_predictor = loadModel(rec_model_file);
cv::Mat srcimg = cv::imread(img_path, cv::IMREAD_COLOR); cv::Mat srcimg = cv::imread(img_path, cv::IMREAD_COLOR);
auto boxes = RunDetModel(det_model_file, srcimg); auto boxes = RunDetModel(det_predictor, srcimg, Config);
RunRecModel(boxes, srcimg, rec_model_file); std::vector<std::string> rec_text;
std::vector<float> rec_text_score;
RunRecModel(
boxes, srcimg, rec_predictor, dict_path, rec_text, rec_text_score);
auto end = std::chrono::system_clock::now(); auto end = std::chrono::system_clock::now();
auto duration = std::chrono::duration_cast<std::chrono::microseconds>(end - start); auto duration =
std::chrono::duration_cast<std::chrono::microseconds>(end - start);
//// visualization
auto img_vis = Visualization(srcimg, boxes);
//// print recognized text
for (int i = 0; i < rec_text.size(); i++) {
std::cout << i << "\t" << rec_text[i] << "\t" << rec_text_score[i]
<< std::endl;
}
std::cout << "花费了" std::cout << "花费了"
<< double(duration.count()) * std::chrono::microseconds::period::num /std::chrono::microseconds::period::den << double(duration.count()) *
std::chrono::microseconds::period::num /
std::chrono::microseconds::period::den
<< "秒" << std::endl; << "秒" << std::endl;
return 0; return 0;
} }
deploy/lite/readme.md
浏览文件 @ f3447747
...@@ -128,7 +128,7 @@ wget https://paddleocr.bj.bcebos.com/ch_models/ch_rec_mv3_crnn_infer.tar && tar ...@@ -128,7 +128,7 @@ wget https://paddleocr.bj.bcebos.com/ch_models/ch_rec_mv3_crnn_infer.tar && tar
### 2.2 与手机联调 ### 2.2 与手机联调
首先需要进行一些准备工作。 首先需要进行一些准备工作。
1. 准备一台arm8的安卓手机，如果编译的预测库和opt文件是armv7，则需要arm7的手机。 1. 准备一台arm8的安卓手机，如果编译的预测库和opt文件是armv7，则需要arm7的手机，并修改Makefile中`ARM_ABI = arm7`。
2. 打开手机的USB调试选项，选择文件传输模式，连接电脑。 2. 打开手机的USB调试选项，选择文件传输模式，连接电脑。
3. 电脑上安装adb工具，用于调试。在电脑终端中输入`adb devices`，如果有类似以下输出，则表示adb安装成功。 3. 电脑上安装adb工具，用于调试。在电脑终端中输入`adb devices`，如果有类似以下输出，则表示adb安装成功。
``` ```
...@@ -188,4 +188,3 @@ demo/cxx/ocr/ ...@@ -188,4 +188,3 @@ demo/cxx/ocr/
``` ```
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deploy/lite/utils/clipper.cpp 已删除 100755 → 0
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/*******************************************************************************
* *
* Author : Angus Johnson *
* Version : 6.4.2 *
* Date : 27 February 2017 *
* Website : http://www.angusj.com *
* Copyright : Angus Johnson 2010-2017 *
* *
* License: *
* Use, modification & distribution is subject to Boost Software License Ver 1. *
* http://www.boost.org/LICENSE_1_0.txt *
* *
* Attributions: *
* The code in this library is an extension of Bala Vatti's clipping algorithm: *
* "A generic solution to polygon clipping" *
* Communications of the ACM, Vol 35, Issue 7 (July 1992) pp 56-63. *
* http://portal.acm.org/citation.cfm?id=129906 *
* *
* Computer graphics and geometric modeling: implementation and algorithms *
* By Max K. Agoston *
* Springer; 1 edition (January 4, 2005) *
* http://books.google.com/books?q=vatti+clipping+agoston *
* *
* See also: *
* "Polygon Offsetting by Computing Winding Numbers" *
* Paper no. DETC2005-85513 pp. 565-575 *
* ASME 2005 International Design Engineering Technical Conferences *
* and Computers and Information in Engineering Conference (IDETC/CIE2005) *
* September 24-28, 2005 , Long Beach, California, USA *
* http://www.me.berkeley.edu/~mcmains/pubs/DAC05OffsetPolygon.pdf *
* *
*******************************************************************************/
/*******************************************************************************
* *
* This is a translation of the Delphi Clipper library and the naming style *
* used has retained a Delphi flavour. *
* *
*******************************************************************************/
#include "clipper.hpp"
#include <cmath>
#include <vector>
#include <algorithm>
#include <stdexcept>
#include <cstring>
#include <cstdlib>
#include <ostream>
#include <functional>
namespace ClipperLib {
static double const pi = 3.141592653589793238;
static double const two_pi = pi *2;
static double const def_arc_tolerance = 0.25;
enum Direction { dRightToLeft, dLeftToRight };
static int const Unassigned = -1; //edge not currently 'owning' a solution
static int const Skip = -2; //edge that would otherwise close a path
#define HORIZONTAL (-1.0E+40)
#define TOLERANCE (1.0e-20)
#define NEAR_ZERO(val) (((val) > -TOLERANCE) && ((val) < TOLERANCE))
struct TEdge {
IntPoint Bot;
IntPoint Curr; //current (updated for every new scanbeam)
IntPoint Top;
double Dx;
PolyType PolyTyp;
EdgeSide Side; //side only refers to current side of solution poly
int WindDelta; //1 or -1 depending on winding direction
int WindCnt;
int WindCnt2; //winding count of the opposite polytype
int OutIdx;
TEdge *Next;
TEdge *Prev;
TEdge *NextInLML;
TEdge *NextInAEL;
TEdge *PrevInAEL;
TEdge *NextInSEL;
TEdge *PrevInSEL;
};
struct IntersectNode {
TEdge *Edge1;
TEdge *Edge2;
IntPoint Pt;
};
struct LocalMinimum {
cInt Y;
TEdge *LeftBound;
TEdge *RightBound;
};
struct OutPt;
//OutRec: contains a path in the clipping solution. Edges in the AEL will
//carry a pointer to an OutRec when they are part of the clipping solution.
struct OutRec {
int Idx;
bool IsHole;
bool IsOpen;
OutRec *FirstLeft; //see comments in clipper.pas
PolyNode *PolyNd;
OutPt *Pts;
OutPt *BottomPt;
};
struct OutPt {
int Idx;
IntPoint Pt;
OutPt *Next;
OutPt *Prev;
};
struct Join {
OutPt *OutPt1;
OutPt *OutPt2;
IntPoint OffPt;
};
struct LocMinSorter
{
inline bool operator()(const LocalMinimum& locMin1, const LocalMinimum& locMin2)
{
return locMin2.Y < locMin1.Y;
}
};
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
inline cInt Round(double val)
{
if ((val < 0)) return static_cast<cInt>(val - 0.5);
else return static_cast<cInt>(val + 0.5);
}
//------------------------------------------------------------------------------
inline cInt Abs(cInt val)
{
return val < 0 ? -val : val;
}
//------------------------------------------------------------------------------
// PolyTree methods ...
//------------------------------------------------------------------------------
void PolyTree::Clear()
{
for (PolyNodes::size_type i = 0; i < AllNodes.size(); ++i)
delete AllNodes[i];
AllNodes.resize(0);
Childs.resize(0);
}
//------------------------------------------------------------------------------
PolyNode* PolyTree::GetFirst() const
{
if (!Childs.empty())
return Childs[0];
else
return 0;
}
//------------------------------------------------------------------------------
int PolyTree::Total() const
{
int result = (int)AllNodes.size();
//with negative offsets, ignore the hidden outer polygon ...
if (result > 0 && Childs[0] != AllNodes[0]) result--;
return result;
}
//------------------------------------------------------------------------------
// PolyNode methods ...
//------------------------------------------------------------------------------
PolyNode::PolyNode(): Parent(0), Index(0), m_IsOpen(false)
{
}
//------------------------------------------------------------------------------
int PolyNode::ChildCount() const
{
return (int)Childs.size();
}
//------------------------------------------------------------------------------
void PolyNode::AddChild(PolyNode& child)
{
unsigned cnt = (unsigned)Childs.size();
Childs.push_back(&child);
child.Parent = this;
child.Index = cnt;
}
//------------------------------------------------------------------------------
PolyNode* PolyNode::GetNext() const
{
if (!Childs.empty())
return Childs[0];
else
return GetNextSiblingUp();
}
//------------------------------------------------------------------------------
PolyNode* PolyNode::GetNextSiblingUp() const
{
if (!Parent) //protects against PolyTree.GetNextSiblingUp()
return 0;
else if (Index == Parent->Childs.size() - 1)
return Parent->GetNextSiblingUp();
else
return Parent->Childs[Index + 1];
}
//------------------------------------------------------------------------------
bool PolyNode::IsHole() const
{
bool result = true;
PolyNode* node = Parent;
while (node)
{
result = !result;
node = node->Parent;
}
return result;
}
//------------------------------------------------------------------------------
bool PolyNode::IsOpen() const
{
return m_IsOpen;
}
//------------------------------------------------------------------------------
#ifndef use_int32
//------------------------------------------------------------------------------
// Int128 class (enables safe math on signed 64bit integers)
// eg Int128 val1((long64)9223372036854775807); //ie 2^63 -1
// Int128 val2((long64)9223372036854775807);
// Int128 val3 = val1 * val2;
// val3.AsString => "85070591730234615847396907784232501249" (8.5e+37)
//------------------------------------------------------------------------------
class Int128
{
public:
ulong64 lo;
long64 hi;
Int128(long64 _lo = 0)
{
lo = (ulong64)_lo;
if (_lo < 0) hi = -1; else hi = 0;
}
Int128(const Int128 &val): lo(val.lo), hi(val.hi){}
Int128(const long64& _hi, const ulong64& _lo): lo(_lo), hi(_hi){}
Int128& operator = (const long64 &val)
{
lo = (ulong64)val;
if (val < 0) hi = -1; else hi = 0;
return *this;
}
bool operator == (const Int128 &val) const
{return (hi == val.hi && lo == val.lo);}
bool operator != (const Int128 &val) const
{ return !(*this == val);}
bool operator > (const Int128 &val) const
{
if (hi != val.hi)
return hi > val.hi;
else
return lo > val.lo;
}
bool operator < (const Int128 &val) const
{
if (hi != val.hi)
return hi < val.hi;
else
return lo < val.lo;
}
bool operator >= (const Int128 &val) const
{ return !(*this < val);}
bool operator <= (const Int128 &val) const
{ return !(*this > val);}
Int128& operator += (const Int128 &rhs)
{
hi += rhs.hi;
lo += rhs.lo;
if (lo < rhs.lo) hi++;
return *this;
}
Int128 operator + (const Int128 &rhs) const
{
Int128 result(*this);
result+= rhs;
return result;
}
Int128& operator -= (const Int128 &rhs)
{
*this += -rhs;
return *this;
}
Int128 operator - (const Int128 &rhs) const
{
Int128 result(*this);
result -= rhs;
return result;
}
Int128 operator-() const //unary negation
{
if (lo == 0)
return Int128(-hi, 0);
else
return Int128(~hi, ~lo + 1);
}
operator double() const
{
const double shift64 = 18446744073709551616.0; //2^64
if (hi < 0)
{
if (lo == 0) return (double)hi * shift64;
else return -(double)(~lo + ~hi * shift64);
}
else
return (double)(lo + hi * shift64);
}
};
//------------------------------------------------------------------------------
Int128 Int128Mul (long64 lhs, long64 rhs)
{
bool negate = (lhs < 0) != (rhs < 0);
if (lhs < 0) lhs = -lhs;
ulong64 int1Hi = ulong64(lhs) >> 32;
ulong64 int1Lo = ulong64(lhs & 0xFFFFFFFF);
if (rhs < 0) rhs = -rhs;
ulong64 int2Hi = ulong64(rhs) >> 32;
ulong64 int2Lo = ulong64(rhs & 0xFFFFFFFF);
//nb: see comments in clipper.pas
ulong64 a = int1Hi * int2Hi;
ulong64 b = int1Lo * int2Lo;
ulong64 c = int1Hi * int2Lo + int1Lo * int2Hi;
Int128 tmp;
tmp.hi = long64(a + (c >> 32));
tmp.lo = long64(c << 32);
tmp.lo += long64(b);
if (tmp.lo < b) tmp.hi++;
if (negate) tmp = -tmp;
return tmp;
};
#endif
//------------------------------------------------------------------------------
// Miscellaneous global functions
//------------------------------------------------------------------------------
bool Orientation(const Path &poly)
{
return Area(poly) >= 0;
}
//------------------------------------------------------------------------------
double Area(const Path &poly)
{
int size = (int)poly.size();
if (size < 3) return 0;
double a = 0;
for (int i = 0, j = size -1; i < size; ++i)
{
a += ((double)poly[j].X + poly[i].X) * ((double)poly[j].Y - poly[i].Y);
j = i;
}
return -a * 0.5;
}
//------------------------------------------------------------------------------
double Area(const OutPt *op)
{
const OutPt *startOp = op;
if (!op) return 0;
double a = 0;
do {
a += (double)(op->Prev->Pt.X + op->Pt.X) * (double)(op->Prev->Pt.Y - op->Pt.Y);
op = op->Next;
} while (op != startOp);
return a * 0.5;
}
//------------------------------------------------------------------------------
double Area(const OutRec &outRec)
{
return Area(outRec.Pts);
}
//------------------------------------------------------------------------------
bool PointIsVertex(const IntPoint &Pt, OutPt *pp)
{
OutPt *pp2 = pp;
do
{
if (pp2->Pt == Pt) return true;
pp2 = pp2->Next;
}
while (pp2 != pp);
return false;
}
//------------------------------------------------------------------------------
//See "The Point in Polygon Problem for Arbitrary Polygons" by Hormann & Agathos
//http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.88.5498&rep=rep1&type=pdf
int PointInPolygon(const IntPoint &pt, const Path &path)
{
//returns 0 if false, +1 if true, -1 if pt ON polygon boundary
int result = 0;
size_t cnt = path.size();
if (cnt < 3) return 0;
IntPoint ip = path[0];
for(size_t i = 1; i <= cnt; ++i)
{
IntPoint ipNext = (i == cnt ? path[0] : path[i]);
if (ipNext.Y == pt.Y)
{
if ((ipNext.X == pt.X) || (ip.Y == pt.Y &&
((ipNext.X > pt.X) == (ip.X < pt.X)))) return -1;
}
if ((ip.Y < pt.Y) != (ipNext.Y < pt.Y))
{
if (ip.X >= pt.X)
{
if (ipNext.X > pt.X) result = 1 - result;
else
{
double d = (double)(ip.X - pt.X) * (ipNext.Y - pt.Y) -
(double)(ipNext.X - pt.X) * (ip.Y - pt.Y);
if (!d) return -1;
if ((d > 0) == (ipNext.Y > ip.Y)) result = 1 - result;
}
} else
{
if (ipNext.X > pt.X)
{
double d = (double)(ip.X - pt.X) * (ipNext.Y - pt.Y) -
(double)(ipNext.X - pt.X) * (ip.Y - pt.Y);
if (!d) return -1;
if ((d > 0) == (ipNext.Y > ip.Y)) result = 1 - result;
}
}
}
ip = ipNext;
}
return result;
}
//------------------------------------------------------------------------------
int PointInPolygon (const IntPoint &pt, OutPt *op)
{
//returns 0 if false, +1 if true, -1 if pt ON polygon boundary
int result = 0;
OutPt* startOp = op;
for(;;)
{
if (op->Next->Pt.Y == pt.Y)
{
if ((op->Next->Pt.X == pt.X) || (op->Pt.Y == pt.Y &&
((op->Next->Pt.X > pt.X) == (op->Pt.X < pt.X)))) return -1;
}
if ((op->Pt.Y < pt.Y) != (op->Next->Pt.Y < pt.Y))
{
if (op->Pt.X >= pt.X)
{
if (op->Next->Pt.X > pt.X) result = 1 - result;
else
{
double d = (double)(op->Pt.X - pt.X) * (op->Next->Pt.Y - pt.Y) -
(double)(op->Next->Pt.X - pt.X) * (op->Pt.Y - pt.Y);
if (!d) return -1;
if ((d > 0) == (op->Next->Pt.Y > op->Pt.Y)) result = 1 - result;
}
} else
{
if (op->Next->Pt.X > pt.X)
{
double d = (double)(op->Pt.X - pt.X) * (op->Next->Pt.Y - pt.Y) -
(double)(op->Next->Pt.X - pt.X) * (op->Pt.Y - pt.Y);
if (!d) return -1;
if ((d > 0) == (op->Next->Pt.Y > op->Pt.Y)) result = 1 - result;
}
}
}
op = op->Next;
if (startOp == op) break;
}
return result;
}
//------------------------------------------------------------------------------
bool Poly2ContainsPoly1(OutPt *OutPt1, OutPt *OutPt2)
{
OutPt* op = OutPt1;
do
{
//nb: PointInPolygon returns 0 if false, +1 if true, -1 if pt on polygon
int res = PointInPolygon(op->Pt, OutPt2);
if (res >= 0) return res > 0;
op = op->Next;
}
while (op != OutPt1);
return true;
}
//----------------------------------------------------------------------
bool SlopesEqual(const TEdge &e1, const TEdge &e2, bool UseFullInt64Range)
{
#ifndef use_int32
if (UseFullInt64Range)
return Int128Mul(e1.Top.Y - e1.Bot.Y, e2.Top.X - e2.Bot.X) ==
Int128Mul(e1.Top.X - e1.Bot.X, e2.Top.Y - e2.Bot.Y);
else
#endif
return (e1.Top.Y - e1.Bot.Y) * (e2.Top.X - e2.Bot.X) ==
(e1.Top.X - e1.Bot.X) * (e2.Top.Y - e2.Bot.Y);
}
//------------------------------------------------------------------------------
bool SlopesEqual(const IntPoint pt1, const IntPoint pt2,
const IntPoint pt3, bool UseFullInt64Range)
{
#ifndef use_int32
if (UseFullInt64Range)
return Int128Mul(pt1.Y-pt2.Y, pt2.X-pt3.X) == Int128Mul(pt1.X-pt2.X, pt2.Y-pt3.Y);
else
#endif
return (pt1.Y-pt2.Y)*(pt2.X-pt3.X) == (pt1.X-pt2.X)*(pt2.Y-pt3.Y);
}
//------------------------------------------------------------------------------
bool SlopesEqual(const IntPoint pt1, const IntPoint pt2,
const IntPoint pt3, const IntPoint pt4, bool UseFullInt64Range)
{
#ifndef use_int32
if (UseFullInt64Range)
return Int128Mul(pt1.Y-pt2.Y, pt3.X-pt4.X) == Int128Mul(pt1.X-pt2.X, pt3.Y-pt4.Y);
else
#endif
return (pt1.Y-pt2.Y)*(pt3.X-pt4.X) == (pt1.X-pt2.X)*(pt3.Y-pt4.Y);
}
//------------------------------------------------------------------------------
inline bool IsHorizontal(TEdge &e)
{
return e.Dx == HORIZONTAL;
}
//------------------------------------------------------------------------------
inline double GetDx(const IntPoint pt1, const IntPoint pt2)
{
return (pt1.Y == pt2.Y) ?
HORIZONTAL : (double)(pt2.X - pt1.X) / (pt2.Y - pt1.Y);
}
//---------------------------------------------------------------------------
inline void SetDx(TEdge &e)
{
cInt dy = (e.Top.Y - e.Bot.Y);
if (dy == 0) e.Dx = HORIZONTAL;
else e.Dx = (double)(e.Top.X - e.Bot.X) / dy;
}
//---------------------------------------------------------------------------
inline void SwapSides(TEdge &Edge1, TEdge &Edge2)
{
EdgeSide Side = Edge1.Side;
Edge1.Side = Edge2.Side;
Edge2.Side = Side;
}
//------------------------------------------------------------------------------
inline void SwapPolyIndexes(TEdge &Edge1, TEdge &Edge2)
{
int OutIdx = Edge1.OutIdx;
Edge1.OutIdx = Edge2.OutIdx;
Edge2.OutIdx = OutIdx;
}
//------------------------------------------------------------------------------
inline cInt TopX(TEdge &edge, const cInt currentY)
{
return ( currentY == edge.Top.Y ) ?
edge.Top.X : edge.Bot.X + Round(edge.Dx *(currentY - edge.Bot.Y));
}
//------------------------------------------------------------------------------
void IntersectPoint(TEdge &Edge1, TEdge &Edge2, IntPoint &ip)
{
#ifdef use_xyz
ip.Z = 0;
#endif
double b1, b2;
if (Edge1.Dx == Edge2.Dx)
{
ip.Y = Edge1.Curr.Y;
ip.X = TopX(Edge1, ip.Y);
return;
}
else if (Edge1.Dx == 0)
{
ip.X = Edge1.Bot.X;
if (IsHorizontal(Edge2))
ip.Y = Edge2.Bot.Y;
else
{
b2 = Edge2.Bot.Y - (Edge2.Bot.X / Edge2.Dx);
ip.Y = Round(ip.X / Edge2.Dx + b2);
}
}
else if (Edge2.Dx == 0)
{
ip.X = Edge2.Bot.X;
if (IsHorizontal(Edge1))
ip.Y = Edge1.Bot.Y;
else
{
b1 = Edge1.Bot.Y - (Edge1.Bot.X / Edge1.Dx);
ip.Y = Round(ip.X / Edge1.Dx + b1);
}
}
else
{
b1 = Edge1.Bot.X - Edge1.Bot.Y * Edge1.Dx;
b2 = Edge2.Bot.X - Edge2.Bot.Y * Edge2.Dx;
double q = (b2-b1) / (Edge1.Dx - Edge2.Dx);
ip.Y = Round(q);
if (std::fabs(Edge1.Dx) < std::fabs(Edge2.Dx))
ip.X = Round(Edge1.Dx * q + b1);
else
ip.X = Round(Edge2.Dx * q + b2);
}
if (ip.Y < Edge1.Top.Y || ip.Y < Edge2.Top.Y)
{
if (Edge1.Top.Y > Edge2.Top.Y)
ip.Y = Edge1.Top.Y;
else
ip.Y = Edge2.Top.Y;
if (std::fabs(Edge1.Dx) < std::fabs(Edge2.Dx))
ip.X = TopX(Edge1, ip.Y);
else
ip.X = TopX(Edge2, ip.Y);
}
//finally, don't allow 'ip' to be BELOW curr.Y (ie bottom of scanbeam) ...
if (ip.Y > Edge1.Curr.Y)
{
ip.Y = Edge1.Curr.Y;
//use the more vertical edge to derive X ...
if (std::fabs(Edge1.Dx) > std::fabs(Edge2.Dx))
ip.X = TopX(Edge2, ip.Y); else
ip.X = TopX(Edge1, ip.Y);
}
}
//------------------------------------------------------------------------------
void ReversePolyPtLinks(OutPt *pp)
{
if (!pp) return;
OutPt *pp1, *pp2;
pp1 = pp;
do {
pp2 = pp1->Next;
pp1->Next = pp1->Prev;
pp1->Prev = pp2;
pp1 = pp2;
} while( pp1 != pp );
}
//------------------------------------------------------------------------------
void DisposeOutPts(OutPt*& pp)
{
if (pp == 0) return;
pp->Prev->Next = 0;
while( pp )
{
OutPt *tmpPp = pp;
pp = pp->Next;
delete tmpPp;
}
}
//------------------------------------------------------------------------------
inline void InitEdge(TEdge* e, TEdge* eNext, TEdge* ePrev, const IntPoint& Pt)
{
std::memset(e, 0, sizeof(TEdge));
e->Next = eNext;
e->Prev = ePrev;
e->Curr = Pt;
e->OutIdx = Unassigned;
}
//------------------------------------------------------------------------------
void InitEdge2(TEdge& e, PolyType Pt)
{
if (e.Curr.Y >= e.Next->Curr.Y)
{
e.Bot = e.Curr;
e.Top = e.Next->Curr;
} else
{
e.Top = e.Curr;
e.Bot = e.Next->Curr;
}
SetDx(e);
e.PolyTyp = Pt;
}
//------------------------------------------------------------------------------
TEdge* RemoveEdge(TEdge* e)
{
//removes e from double_linked_list (but without removing from memory)
e->Prev->Next = e->Next;
e->Next->Prev = e->Prev;
TEdge* result = e->Next;
e->Prev = 0; //flag as removed (see ClipperBase.Clear)
return result;
}
//------------------------------------------------------------------------------
inline void ReverseHorizontal(TEdge &e)
{
//swap horizontal edges' Top and Bottom x's so they follow the natural
//progression of the bounds - ie so their xbots will align with the
//adjoining lower edge. [Helpful in the ProcessHorizontal() method.]
std::swap(e.Top.X, e.Bot.X);
#ifdef use_xyz
std::swap(e.Top.Z, e.Bot.Z);
#endif
}
//------------------------------------------------------------------------------
void SwapPoints(IntPoint &pt1, IntPoint &pt2)
{
IntPoint tmp = pt1;
pt1 = pt2;
pt2 = tmp;
}
//------------------------------------------------------------------------------
bool GetOverlapSegment(IntPoint pt1a, IntPoint pt1b, IntPoint pt2a,
IntPoint pt2b, IntPoint &pt1, IntPoint &pt2)
{
//precondition: segments are Collinear.
if (Abs(pt1a.X - pt1b.X) > Abs(pt1a.Y - pt1b.Y))
{
if (pt1a.X > pt1b.X) SwapPoints(pt1a, pt1b);
if (pt2a.X > pt2b.X) SwapPoints(pt2a, pt2b);
if (pt1a.X > pt2a.X) pt1 = pt1a; else pt1 = pt2a;
if (pt1b.X < pt2b.X) pt2 = pt1b; else pt2 = pt2b;
return pt1.X < pt2.X;
} else
{
if (pt1a.Y < pt1b.Y) SwapPoints(pt1a, pt1b);
if (pt2a.Y < pt2b.Y) SwapPoints(pt2a, pt2b);
if (pt1a.Y < pt2a.Y) pt1 = pt1a; else pt1 = pt2a;
if (pt1b.Y > pt2b.Y) pt2 = pt1b; else pt2 = pt2b;
return pt1.Y > pt2.Y;
}
}
//------------------------------------------------------------------------------
bool FirstIsBottomPt(const OutPt* btmPt1, const OutPt* btmPt2)
{
OutPt *p = btmPt1->Prev;
while ((p->Pt == btmPt1->Pt) && (p != btmPt1)) p = p->Prev;
double dx1p = std::fabs(GetDx(btmPt1->Pt, p->Pt));
p = btmPt1->Next;
while ((p->Pt == btmPt1->Pt) && (p != btmPt1)) p = p->Next;
double dx1n = std::fabs(GetDx(btmPt1->Pt, p->Pt));
p = btmPt2->Prev;
while ((p->Pt == btmPt2->Pt) && (p != btmPt2)) p = p->Prev;
double dx2p = std::fabs(GetDx(btmPt2->Pt, p->Pt));
p = btmPt2->Next;
while ((p->Pt == btmPt2->Pt) && (p != btmPt2)) p = p->Next;
double dx2n = std::fabs(GetDx(btmPt2->Pt, p->Pt));
if (std::max(dx1p, dx1n) == std::max(dx2p, dx2n) &&
std::min(dx1p, dx1n) == std::min(dx2p, dx2n))
return Area(btmPt1) > 0; //if otherwise identical use orientation
else
return (dx1p >= dx2p && dx1p >= dx2n) || (dx1n >= dx2p && dx1n >= dx2n);
}
//------------------------------------------------------------------------------
OutPt* GetBottomPt(OutPt *pp)
{
OutPt* dups = 0;
OutPt* p = pp->Next;
while (p != pp)
{
if (p->Pt.Y > pp->Pt.Y)
{
pp = p;
dups = 0;
}
else if (p->Pt.Y == pp->Pt.Y && p->Pt.X <= pp->Pt.X)
{
if (p->Pt.X < pp->Pt.X)
{
dups = 0;
pp = p;
} else
{
if (p->Next != pp && p->Prev != pp) dups = p;
}
}
p = p->Next;
}
if (dups)
{
//there appears to be at least 2 vertices at BottomPt so ...
while (dups != p)
{
if (!FirstIsBottomPt(p, dups)) pp = dups;
dups = dups->Next;
while (dups->Pt != pp->Pt) dups = dups->Next;
}
}
return pp;
}
//------------------------------------------------------------------------------
bool Pt2IsBetweenPt1AndPt3(const IntPoint pt1,
const IntPoint pt2, const IntPoint pt3)
{
if ((pt1 == pt3) || (pt1 == pt2) || (pt3 == pt2))
return false;
else if (pt1.X != pt3.X)
return (pt2.X > pt1.X) == (pt2.X < pt3.X);
else
return (pt2.Y > pt1.Y) == (pt2.Y < pt3.Y);
}
//------------------------------------------------------------------------------
bool HorzSegmentsOverlap(cInt seg1a, cInt seg1b, cInt seg2a, cInt seg2b)
{
if (seg1a > seg1b) std::swap(seg1a, seg1b);
if (seg2a > seg2b) std::swap(seg2a, seg2b);
return (seg1a < seg2b) && (seg2a < seg1b);
}
//------------------------------------------------------------------------------
// ClipperBase class methods ...
//------------------------------------------------------------------------------
ClipperBase::ClipperBase() //constructor
{
m_CurrentLM = m_MinimaList.begin(); //begin() == end() here
m_UseFullRange = false;
}
//------------------------------------------------------------------------------
ClipperBase::~ClipperBase() //destructor
{
Clear();
}
//------------------------------------------------------------------------------
void RangeTest(const IntPoint& Pt, bool& useFullRange)
{
if (useFullRange)
{
if (Pt.X > hiRange || Pt.Y > hiRange || -Pt.X > hiRange || -Pt.Y > hiRange)
throw clipperException("Coordinate outside allowed range");
}
else if (Pt.X > loRange|| Pt.Y > loRange || -Pt.X > loRange || -Pt.Y > loRange)
{
useFullRange = true;
RangeTest(Pt, useFullRange);
}
}
//------------------------------------------------------------------------------
TEdge* FindNextLocMin(TEdge* E)
{
for (;;)
{
while (E->Bot != E->Prev->Bot || E->Curr == E->Top) E = E->Next;
if (!IsHorizontal(*E) && !IsHorizontal(*E->Prev)) break;
while (IsHorizontal(*E->Prev)) E = E->Prev;
TEdge* E2 = E;
while (IsHorizontal(*E)) E = E->Next;
if (E->Top.Y == E->Prev->Bot.Y) continue; //ie just an intermediate horz.
if (E2->Prev->Bot.X < E->Bot.X) E = E2;
break;
}
return E;
}
//------------------------------------------------------------------------------
TEdge* ClipperBase::ProcessBound(TEdge* E, bool NextIsForward)
{
TEdge *Result = E;
TEdge *Horz = 0;
if (E->OutIdx == Skip)
{
//if edges still remain in the current bound beyond the skip edge then
//create another LocMin and call ProcessBound once more
if (NextIsForward)
{
while (E->Top.Y == E->Next->Bot.Y) E = E->Next;
//don't include top horizontals when parsing a bound a second time,
//they will be contained in the opposite bound ...
while (E != Result && IsHorizontal(*E)) E = E->Prev;
}
else
{
while (E->Top.Y == E->Prev->Bot.Y) E = E->Prev;
while (E != Result && IsHorizontal(*E)) E = E->Next;
}
if (E == Result)
{
if (NextIsForward) Result = E->Next;
else Result = E->Prev;
}
else
{
//there are more edges in the bound beyond result starting with E
if (NextIsForward)
E = Result->Next;
else
E = Result->Prev;
MinimaList::value_type locMin;
locMin.Y = E->Bot.Y;
locMin.LeftBound = 0;
locMin.RightBound = E;
E->WindDelta = 0;
Result = ProcessBound(E, NextIsForward);
m_MinimaList.push_back(locMin);
}
return Result;
}
TEdge *EStart;
if (IsHorizontal(*E))
{
//We need to be careful with open paths because this may not be a
//true local minima (ie E may be following a skip edge).
//Also, consecutive horz. edges may start heading left before going right.
if (NextIsForward)
EStart = E->Prev;
else
EStart = E->Next;
if (IsHorizontal(*EStart)) //ie an adjoining horizontal skip edge
{
if (EStart->Bot.X != E->Bot.X && EStart->Top.X != E->Bot.X)
ReverseHorizontal(*E);
}
else if (EStart->Bot.X != E->Bot.X)
ReverseHorizontal(*E);
}
EStart = E;
if (NextIsForward)
{
while (Result->Top.Y == Result->Next->Bot.Y && Result->Next->OutIdx != Skip)
Result = Result->Next;
if (IsHorizontal(*Result) && Result->Next->OutIdx != Skip)
{
//nb: at the top of a bound, horizontals are added to the bound
//only when the preceding edge attaches to the horizontal's left vertex
//unless a Skip edge is encountered when that becomes the top divide
Horz = Result;
while (IsHorizontal(*Horz->Prev)) Horz = Horz->Prev;
if (Horz->Prev->Top.X > Result->Next->Top.X) Result = Horz->Prev;
}
while (E != Result)
{
E->NextInLML = E->Next;
if (IsHorizontal(*E) && E != EStart &&
E->Bot.X != E->Prev->Top.X) ReverseHorizontal(*E);
E = E->Next;
}
if (IsHorizontal(*E) && E != EStart && E->Bot.X != E->Prev->Top.X)
ReverseHorizontal(*E);
Result = Result->Next; //move to the edge just beyond current bound
} else
{
while (Result->Top.Y == Result->Prev->Bot.Y && Result->Prev->OutIdx != Skip)
Result = Result->Prev;
if (IsHorizontal(*Result) && Result->Prev->OutIdx != Skip)
{
Horz = Result;
while (IsHorizontal(*Horz->Next)) Horz = Horz->Next;
if (Horz->Next->Top.X == Result->Prev->Top.X ||
Horz->Next->Top.X > Result->Prev->Top.X) Result = Horz->Next;
}
while (E != Result)
{
E->NextInLML = E->Prev;
if (IsHorizontal(*E) && E != EStart && E->Bot.X != E->Next->Top.X)
ReverseHorizontal(*E);
E = E->Prev;
}
if (IsHorizontal(*E) && E != EStart && E->Bot.X != E->Next->Top.X)
ReverseHorizontal(*E);
Result = Result->Prev; //move to the edge just beyond current bound
}
return Result;
}
//------------------------------------------------------------------------------
bool ClipperBase::AddPath(const Path &pg, PolyType PolyTyp, bool Closed)
{
#ifdef use_lines
if (!Closed && PolyTyp == ptClip)
throw clipperException("AddPath: Open paths must be subject.");
#else
if (!Closed)
throw clipperException("AddPath: Open paths have been disabled.");
#endif
int highI = (int)pg.size() -1;
if (Closed) while (highI > 0 && (pg[highI] == pg[0])) --highI;
while (highI > 0 && (pg[highI] == pg[highI -1])) --highI;
if ((Closed && highI < 2) || (!Closed && highI < 1)) return false;
//create a new edge array ...
TEdge *edges = new TEdge [highI +1];
bool IsFlat = true;
//1. Basic (first) edge initialization ...
try
{
edges[1].Curr = pg[1];
RangeTest(pg[0], m_UseFullRange);
RangeTest(pg[highI], m_UseFullRange);
InitEdge(&edges[0], &edges[1], &edges[highI], pg[0]);
InitEdge(&edges[highI], &edges[0], &edges[highI-1], pg[highI]);
for (int i = highI - 1; i >= 1; --i)
{
RangeTest(pg[i], m_UseFullRange);
InitEdge(&edges[i], &edges[i+1], &edges[i-1], pg[i]);
}
}
catch(...)
{
delete [] edges;
throw; //range test fails
}
TEdge *eStart = &edges[0];
//2. Remove duplicate vertices, and (when closed) collinear edges ...
TEdge *E = eStart, *eLoopStop = eStart;
for (;;)
{
//nb: allows matching start and end points when not Closed ...
if (E->Curr == E->Next->Curr && (Closed || E->Next != eStart))
{
if (E == E->Next) break;
if (E == eStart) eStart = E->Next;
E = RemoveEdge(E);
eLoopStop = E;
continue;
}
if (E->Prev == E->Next)
break; //only two vertices
else if (Closed &&
SlopesEqual(E->Prev->Curr, E->Curr, E->Next->Curr, m_UseFullRange) &&
(!m_PreserveCollinear ||
!Pt2IsBetweenPt1AndPt3(E->Prev->Curr, E->Curr, E->Next->Curr)))
{
//Collinear edges are allowed for open paths but in closed paths
//the default is to merge adjacent collinear edges into a single edge.
//However, if the PreserveCollinear property is enabled, only overlapping
//collinear edges (ie spikes) will be removed from closed paths.
if (E == eStart) eStart = E->Next;
E = RemoveEdge(E);
E = E->Prev;
eLoopStop = E;
continue;
}
E = E->Next;
if ((E == eLoopStop) || (!Closed && E->Next == eStart)) break;
}
if ((!Closed && (E == E->Next)) || (Closed && (E->Prev == E->Next)))
{
delete [] edges;
return false;
}
if (!Closed)
{
m_HasOpenPaths = true;
eStart->Prev->OutIdx = Skip;
}
//3. Do second stage of edge initialization ...
E = eStart;
do
{
InitEdge2(*E, PolyTyp);
E = E->Next;
if (IsFlat && E->Curr.Y != eStart->Curr.Y) IsFlat = false;
}
while (E != eStart);
//4. Finally, add edge bounds to LocalMinima list ...
//Totally flat paths must be handled differently when adding them
//to LocalMinima list to avoid endless loops etc ...
if (IsFlat)
{
if (Closed)
{
delete [] edges;
return false;
}
E->Prev->OutIdx = Skip;
MinimaList::value_type locMin;
locMin.Y = E->Bot.Y;
locMin.LeftBound = 0;
locMin.RightBound = E;
locMin.RightBound->Side = esRight;
locMin.RightBound->WindDelta = 0;
for (;;)
{
if (E->Bot.X != E->Prev->Top.X) ReverseHorizontal(*E);
if (E->Next->OutIdx == Skip) break;
E->NextInLML = E->Next;
E = E->Next;
}
m_MinimaList.push_back(locMin);
m_edges.push_back(edges);
return true;
}
m_edges.push_back(edges);
bool leftBoundIsForward;
TEdge* EMin = 0;
//workaround to avoid an endless loop in the while loop below when
//open paths have matching start and end points ...
if (E->Prev->Bot == E->Prev->Top) E = E->Next;
for (;;)
{
E = FindNextLocMin(E);
if (E == EMin) break;
else if (!EMin) EMin = E;
//E and E.Prev now share a local minima (left aligned if horizontal).
//Compare their slopes to find which starts which bound ...
MinimaList::value_type locMin;
locMin.Y = E->Bot.Y;
if (E->Dx < E->Prev->Dx)
{
locMin.LeftBound = E->Prev;
locMin.RightBound = E;
leftBoundIsForward = false; //Q.nextInLML = Q.prev
} else
{
locMin.LeftBound = E;
locMin.RightBound = E->Prev;
leftBoundIsForward = true; //Q.nextInLML = Q.next
}
if (!Closed) locMin.LeftBound->WindDelta = 0;
else if (locMin.LeftBound->Next == locMin.RightBound)
locMin.LeftBound->WindDelta = -1;
else locMin.LeftBound->WindDelta = 1;
locMin.RightBound->WindDelta = -locMin.LeftBound->WindDelta;
E = ProcessBound(locMin.LeftBound, leftBoundIsForward);
if (E->OutIdx == Skip) E = ProcessBound(E, leftBoundIsForward);
TEdge* E2 = ProcessBound(locMin.RightBound, !leftBoundIsForward);
if (E2->OutIdx == Skip) E2 = ProcessBound(E2, !leftBoundIsForward);
if (locMin.LeftBound->OutIdx == Skip)
locMin.LeftBound = 0;
else if (locMin.RightBound->OutIdx == Skip)
locMin.RightBound = 0;
m_MinimaList.push_back(locMin);
if (!leftBoundIsForward) E = E2;
}
return true;
}
//------------------------------------------------------------------------------
bool ClipperBase::AddPaths(const Paths &ppg, PolyType PolyTyp, bool Closed)
{
bool result = false;
for (Paths::size_type i = 0; i < ppg.size(); ++i)
if (AddPath(ppg[i], PolyTyp, Closed)) result = true;
return result;
}
//------------------------------------------------------------------------------
void ClipperBase::Clear()
{
DisposeLocalMinimaList();
for (EdgeList::size_type i = 0; i < m_edges.size(); ++i)
{
TEdge* edges = m_edges[i];
delete [] edges;
}
m_edges.clear();
m_UseFullRange = false;
m_HasOpenPaths = false;
}
//------------------------------------------------------------------------------
void ClipperBase::Reset()
{
m_CurrentLM = m_MinimaList.begin();
if (m_CurrentLM == m_MinimaList.end()) return; //ie nothing to process
std::sort(m_MinimaList.begin(), m_MinimaList.end(), LocMinSorter());
m_Scanbeam = ScanbeamList(); //clears/resets priority_queue
//reset all edges ...
for (MinimaList::iterator lm = m_MinimaList.begin(); lm != m_MinimaList.end(); ++lm)
{
InsertScanbeam(lm->Y);
TEdge* e = lm->LeftBound;
if (e)
{
e->Curr = e->Bot;
e->Side = esLeft;
e->OutIdx = Unassigned;
}
e = lm->RightBound;
if (e)
{
e->Curr = e->Bot;
e->Side = esRight;
e->OutIdx = Unassigned;
}
}
m_ActiveEdges = 0;
m_CurrentLM = m_MinimaList.begin();
}
//------------------------------------------------------------------------------
void ClipperBase::DisposeLocalMinimaList()
{
m_MinimaList.clear();
m_CurrentLM = m_MinimaList.begin();
}
//------------------------------------------------------------------------------
bool ClipperBase::PopLocalMinima(cInt Y, const LocalMinimum *&locMin)
{
if (m_CurrentLM == m_MinimaList.end() || (*m_CurrentLM).Y != Y) return false;
locMin = &(*m_CurrentLM);
++m_CurrentLM;
return true;
}
//------------------------------------------------------------------------------
IntRect ClipperBase::GetBounds()
{
IntRect result;
MinimaList::iterator lm = m_MinimaList.begin();
if (lm == m_MinimaList.end())
{
result.left = result.top = result.right = result.bottom = 0;
return result;
}
result.left = lm->LeftBound->Bot.X;
result.top = lm->LeftBound->Bot.Y;
result.right = lm->LeftBound->Bot.X;
result.bottom = lm->LeftBound->Bot.Y;
while (lm != m_MinimaList.end())
{
//todo - needs fixing for open paths
result.bottom = std::max(result.bottom, lm->LeftBound->Bot.Y);
TEdge* e = lm->LeftBound;
for (;;) {
TEdge* bottomE = e;
while (e->NextInLML)
{
if (e->Bot.X < result.left) result.left = e->Bot.X;
if (e->Bot.X > result.right) result.right = e->Bot.X;
e = e->NextInLML;
}
result.left = std::min(result.left, e->Bot.X);
result.right = std::max(result.right, e->Bot.X);
result.left = std::min(result.left, e->Top.X);
result.right = std::max(result.right, e->Top.X);
result.top = std::min(result.top, e->Top.Y);
if (bottomE == lm->LeftBound) e = lm->RightBound;
else break;
}
++lm;
}
return result;
}
//------------------------------------------------------------------------------
void ClipperBase::InsertScanbeam(const cInt Y)
{
m_Scanbeam.push(Y);
}
//------------------------------------------------------------------------------
bool ClipperBase::PopScanbeam(cInt &Y)
{
if (m_Scanbeam.empty()) return false;
Y = m_Scanbeam.top();
m_Scanbeam.pop();
while (!m_Scanbeam.empty() && Y == m_Scanbeam.top()) { m_Scanbeam.pop(); } // Pop duplicates.
return true;
}
//------------------------------------------------------------------------------
void ClipperBase::DisposeAllOutRecs(){
for (PolyOutList::size_type i = 0; i < m_PolyOuts.size(); ++i)
DisposeOutRec(i);
m_PolyOuts.clear();
}
//------------------------------------------------------------------------------
void ClipperBase::DisposeOutRec(PolyOutList::size_type index)
{
OutRec *outRec = m_PolyOuts[index];
if (outRec->Pts) DisposeOutPts(outRec->Pts);
delete outRec;
m_PolyOuts[index] = 0;
}
//------------------------------------------------------------------------------
void ClipperBase::DeleteFromAEL(TEdge *e)
{
TEdge* AelPrev = e->PrevInAEL;
TEdge* AelNext = e->NextInAEL;
if (!AelPrev && !AelNext && (e != m_ActiveEdges)) return; //already deleted
if (AelPrev) AelPrev->NextInAEL = AelNext;
else m_ActiveEdges = AelNext;
if (AelNext) AelNext->PrevInAEL = AelPrev;
e->NextInAEL = 0;
e->PrevInAEL = 0;
}
//------------------------------------------------------------------------------
OutRec* ClipperBase::CreateOutRec()
{
OutRec* result = new OutRec;
result->IsHole = false;
result->IsOpen = false;
result->FirstLeft = 0;
result->Pts = 0;
result->BottomPt = 0;
result->PolyNd = 0;
m_PolyOuts.push_back(result);
result->Idx = (int)m_PolyOuts.size() - 1;
return result;
}
//------------------------------------------------------------------------------
void ClipperBase::SwapPositionsInAEL(TEdge *Edge1, TEdge *Edge2)
{
//check that one or other edge hasn't already been removed from AEL ...
if (Edge1->NextInAEL == Edge1->PrevInAEL ||
Edge2->NextInAEL == Edge2->PrevInAEL) return;
if (Edge1->NextInAEL == Edge2)
{
TEdge* Next = Edge2->NextInAEL;
if (Next) Next->PrevInAEL = Edge1;
TEdge* Prev = Edge1->PrevInAEL;
if (Prev) Prev->NextInAEL = Edge2;
Edge2->PrevInAEL = Prev;
Edge2->NextInAEL = Edge1;
Edge1->PrevInAEL = Edge2;
Edge1->NextInAEL = Next;
}
else if (Edge2->NextInAEL == Edge1)
{
TEdge* Next = Edge1->NextInAEL;
if (Next) Next->PrevInAEL = Edge2;
TEdge* Prev = Edge2->PrevInAEL;
if (Prev) Prev->NextInAEL = Edge1;
Edge1->PrevInAEL = Prev;
Edge1->NextInAEL = Edge2;
Edge2->PrevInAEL = Edge1;
Edge2->NextInAEL = Next;
}
else
{
TEdge* Next = Edge1->NextInAEL;
TEdge* Prev = Edge1->PrevInAEL;
Edge1->NextInAEL = Edge2->NextInAEL;
if (Edge1->NextInAEL) Edge1->NextInAEL->PrevInAEL = Edge1;
Edge1->PrevInAEL = Edge2->PrevInAEL;
if (Edge1->PrevInAEL) Edge1->PrevInAEL->NextInAEL = Edge1;
Edge2->NextInAEL = Next;
if (Edge2->NextInAEL) Edge2->NextInAEL->PrevInAEL = Edge2;
Edge2->PrevInAEL = Prev;
if (Edge2->PrevInAEL) Edge2->PrevInAEL->NextInAEL = Edge2;
}
if (!Edge1->PrevInAEL) m_ActiveEdges = Edge1;
else if (!Edge2->PrevInAEL) m_ActiveEdges = Edge2;
}
//------------------------------------------------------------------------------
void ClipperBase::UpdateEdgeIntoAEL(TEdge *&e)
{
if (!e->NextInLML)
throw clipperException("UpdateEdgeIntoAEL: invalid call");
e->NextInLML->OutIdx = e->OutIdx;
TEdge* AelPrev = e->PrevInAEL;
TEdge* AelNext = e->NextInAEL;
if (AelPrev) AelPrev->NextInAEL = e->NextInLML;
else m_ActiveEdges = e->NextInLML;
if (AelNext) AelNext->PrevInAEL = e->NextInLML;
e->NextInLML->Side = e->Side;
e->NextInLML->WindDelta = e->WindDelta;
e->NextInLML->WindCnt = e->WindCnt;
e->NextInLML->WindCnt2 = e->WindCnt2;
e = e->NextInLML;
e->Curr = e->Bot;
e->PrevInAEL = AelPrev;
e->NextInAEL = AelNext;
if (!IsHorizontal(*e)) InsertScanbeam(e->Top.Y);
}
//------------------------------------------------------------------------------
bool ClipperBase::LocalMinimaPending()
{
return (m_CurrentLM != m_MinimaList.end());
}
//------------------------------------------------------------------------------
// TClipper methods ...
//------------------------------------------------------------------------------
Clipper::Clipper(int initOptions) : ClipperBase() //constructor
{
m_ExecuteLocked = false;
m_UseFullRange = false;
m_ReverseOutput = ((initOptions & ioReverseSolution) != 0);
m_StrictSimple = ((initOptions & ioStrictlySimple) != 0);
m_PreserveCollinear = ((initOptions & ioPreserveCollinear) != 0);
m_HasOpenPaths = false;
#ifdef use_xyz
m_ZFill = 0;
#endif
}
//------------------------------------------------------------------------------
#ifdef use_xyz
void Clipper::ZFillFunction(ZFillCallback zFillFunc)
{
m_ZFill = zFillFunc;
}
//------------------------------------------------------------------------------
#endif
bool Clipper::Execute(ClipType clipType, Paths &solution, PolyFillType fillType)
{
return Execute(clipType, solution, fillType, fillType);
}
//------------------------------------------------------------------------------
bool Clipper::Execute(ClipType clipType, PolyTree &polytree, PolyFillType fillType)
{
return Execute(clipType, polytree, fillType, fillType);
}
//------------------------------------------------------------------------------
bool Clipper::Execute(ClipType clipType, Paths &solution,
PolyFillType subjFillType, PolyFillType clipFillType)
{
if( m_ExecuteLocked ) return false;
if (m_HasOpenPaths)
throw clipperException("Error: PolyTree struct is needed for open path clipping.");
m_ExecuteLocked = true;
solution.resize(0);
m_SubjFillType = subjFillType;
m_ClipFillType = clipFillType;
m_ClipType = clipType;
m_UsingPolyTree = false;
bool succeeded = ExecuteInternal();
if (succeeded) BuildResult(solution);
DisposeAllOutRecs();
m_ExecuteLocked = false;
return succeeded;
}
//------------------------------------------------------------------------------
bool Clipper::Execute(ClipType clipType, PolyTree& polytree,
PolyFillType subjFillType, PolyFillType clipFillType)
{
if( m_ExecuteLocked ) return false;
m_ExecuteLocked = true;
m_SubjFillType = subjFillType;
m_ClipFillType = clipFillType;
m_ClipType = clipType;
m_UsingPolyTree = true;
bool succeeded = ExecuteInternal();
if (succeeded) BuildResult2(polytree);
DisposeAllOutRecs();
m_ExecuteLocked = false;
return succeeded;
}
//------------------------------------------------------------------------------
void Clipper::FixHoleLinkage(OutRec &outrec)
{
//skip OutRecs that (a) contain outermost polygons or
//(b) already have the correct owner/child linkage ...
if (!outrec.FirstLeft ||
(outrec.IsHole != outrec.FirstLeft->IsHole &&
outrec.FirstLeft->Pts)) return;
OutRec* orfl = outrec.FirstLeft;
while (orfl && ((orfl->IsHole == outrec.IsHole) || !orfl->Pts))
orfl = orfl->FirstLeft;
outrec.FirstLeft = orfl;
}
//------------------------------------------------------------------------------
bool Clipper::ExecuteInternal()
{
bool succeeded = true;
try {
Reset();
m_Maxima = MaximaList();
m_SortedEdges = 0;
succeeded = true;
cInt botY, topY;
if (!PopScanbeam(botY)) return false;
InsertLocalMinimaIntoAEL(botY);
while (PopScanbeam(topY) || LocalMinimaPending())
{
ProcessHorizontals();
ClearGhostJoins();
if (!ProcessIntersections(topY))
{
succeeded = false;
break;
}
ProcessEdgesAtTopOfScanbeam(topY);
botY = topY;
InsertLocalMinimaIntoAEL(botY);
}
}
catch(...)
{
succeeded = false;
}
if (succeeded)
{
//fix orientations ...
for (PolyOutList::size_type i = 0; i < m_PolyOuts.size(); ++i)
{
OutRec *outRec = m_PolyOuts[i];
if (!outRec->Pts || outRec->IsOpen) continue;
if ((outRec->IsHole ^ m_ReverseOutput) == (Area(*outRec) > 0))
ReversePolyPtLinks(outRec->Pts);
}
if (!m_Joins.empty()) JoinCommonEdges();
//unfortunately FixupOutPolygon() must be done after JoinCommonEdges()
for (PolyOutList::size_type i = 0; i < m_PolyOuts.size(); ++i)
{
OutRec *outRec = m_PolyOuts[i];
if (!outRec->Pts) continue;
if (outRec->IsOpen)
FixupOutPolyline(*outRec);
else
FixupOutPolygon(*outRec);
}
if (m_StrictSimple) DoSimplePolygons();
}
ClearJoins();
ClearGhostJoins();
return succeeded;
}
//------------------------------------------------------------------------------
void Clipper::SetWindingCount(TEdge &edge)
{
TEdge *e = edge.PrevInAEL;
//find the edge of the same polytype that immediately preceeds 'edge' in AEL
while (e && ((e->PolyTyp != edge.PolyTyp) || (e->WindDelta == 0))) e = e->PrevInAEL;
if (!e)
{
if (edge.WindDelta == 0)
{
PolyFillType pft = (edge.PolyTyp == ptSubject ? m_SubjFillType : m_ClipFillType);
edge.WindCnt = (pft == pftNegative ? -1 : 1);
}
else
edge.WindCnt = edge.WindDelta;
edge.WindCnt2 = 0;
e = m_ActiveEdges; //ie get ready to calc WindCnt2
}
else if (edge.WindDelta == 0 && m_ClipType != ctUnion)
{
edge.WindCnt = 1;
edge.WindCnt2 = e->WindCnt2;
e = e->NextInAEL; //ie get ready to calc WindCnt2
}
else if (IsEvenOddFillType(edge))
{
//EvenOdd filling ...
if (edge.WindDelta == 0)
{
//are we inside a subj polygon ...
bool Inside = true;
TEdge *e2 = e->PrevInAEL;
while (e2)
{
if (e2->PolyTyp == e->PolyTyp && e2->WindDelta != 0)
Inside = !Inside;
e2 = e2->PrevInAEL;
}
edge.WindCnt = (Inside ? 0 : 1);
}
else
{
edge.WindCnt = edge.WindDelta;
}
edge.WindCnt2 = e->WindCnt2;
e = e->NextInAEL; //ie get ready to calc WindCnt2
}
else
{
//nonZero, Positive or Negative filling ...
if (e->WindCnt * e->WindDelta < 0)
{
//prev edge is 'decreasing' WindCount (WC) toward zero
//so we're outside the previous polygon ...
if (Abs(e->WindCnt) > 1)
{
//outside prev poly but still inside another.
//when reversing direction of prev poly use the same WC
if (e->WindDelta * edge.WindDelta < 0) edge.WindCnt = e->WindCnt;
//otherwise continue to 'decrease' WC ...
else edge.WindCnt = e->WindCnt + edge.WindDelta;
}
else
//now outside all polys of same polytype so set own WC ...
edge.WindCnt = (edge.WindDelta == 0 ? 1 : edge.WindDelta);
} else
{
//prev edge is 'increasing' WindCount (WC) away from zero
//so we're inside the previous polygon ...
if (edge.WindDelta == 0)
edge.WindCnt = (e->WindCnt < 0 ? e->WindCnt - 1 : e->WindCnt + 1);
//if wind direction is reversing prev then use same WC
else if (e->WindDelta * edge.WindDelta < 0) edge.WindCnt = e->WindCnt;
//otherwise add to WC ...
else edge.WindCnt = e->WindCnt + edge.WindDelta;
}
edge.WindCnt2 = e->WindCnt2;
e = e->NextInAEL; //ie get ready to calc WindCnt2
}
//update WindCnt2 ...
if (IsEvenOddAltFillType(edge))
{
//EvenOdd filling ...
while (e != &edge)
{
if (e->WindDelta != 0)
edge.WindCnt2 = (edge.WindCnt2 == 0 ? 1 : 0);
e = e->NextInAEL;
}
} else
{
//nonZero, Positive or Negative filling ...
while ( e != &edge )
{
edge.WindCnt2 += e->WindDelta;
e = e->NextInAEL;
}
}
}
//------------------------------------------------------------------------------
bool Clipper::IsEvenOddFillType(const TEdge& edge) const
{
if (edge.PolyTyp == ptSubject)
return m_SubjFillType == pftEvenOdd; else
return m_ClipFillType == pftEvenOdd;
}
//------------------------------------------------------------------------------
bool Clipper::IsEvenOddAltFillType(const TEdge& edge) const
{
if (edge.PolyTyp == ptSubject)
return m_ClipFillType == pftEvenOdd; else
return m_SubjFillType == pftEvenOdd;
}
//------------------------------------------------------------------------------
bool Clipper::IsContributing(const TEdge& edge) const
{
PolyFillType pft, pft2;
if (edge.PolyTyp == ptSubject)
{
pft = m_SubjFillType;
pft2 = m_ClipFillType;
} else
{
pft = m_ClipFillType;
pft2 = m_SubjFillType;
}
switch(pft)
{
case pftEvenOdd:
//return false if a subj line has been flagged as inside a subj polygon
if (edge.WindDelta == 0 && edge.WindCnt != 1) return false;
break;
case pftNonZero:
if (Abs(edge.WindCnt) != 1) return false;
break;
case pftPositive:
if (edge.WindCnt != 1) return false;
break;
default: //pftNegative
if (edge.WindCnt != -1) return false;
}
switch(m_ClipType)
{
case ctIntersection:
switch(pft2)
{
case pftEvenOdd:
case pftNonZero:
return (edge.WindCnt2 != 0);
case pftPositive:
return (edge.WindCnt2 > 0);
default:
return (edge.WindCnt2 < 0);
}
break;
case ctUnion:
switch(pft2)
{
case pftEvenOdd:
case pftNonZero:
return (edge.WindCnt2 == 0);
case pftPositive:
return (edge.WindCnt2 <= 0);
default:
return (edge.WindCnt2 >= 0);
}
break;
case ctDifference:
if (edge.PolyTyp == ptSubject)
switch(pft2)
{
case pftEvenOdd:
case pftNonZero:
return (edge.WindCnt2 == 0);
case pftPositive:
return (edge.WindCnt2 <= 0);
default:
return (edge.WindCnt2 >= 0);
}
else
switch(pft2)
{
case pftEvenOdd:
case pftNonZero:
return (edge.WindCnt2 != 0);
case pftPositive:
return (edge.WindCnt2 > 0);
default:
return (edge.WindCnt2 < 0);
}
break;
case ctXor:
if (edge.WindDelta == 0) //XOr always contributing unless open
switch(pft2)
{
case pftEvenOdd:
case pftNonZero:
return (edge.WindCnt2 == 0);
case pftPositive:
return (edge.WindCnt2 <= 0);
default:
return (edge.WindCnt2 >= 0);
}
else
return true;
break;
default:
return true;
}
}
//------------------------------------------------------------------------------
OutPt* Clipper::AddLocalMinPoly(TEdge *e1, TEdge *e2, const IntPoint &Pt)
{
OutPt* result;
TEdge *e, *prevE;
if (IsHorizontal(*e2) || ( e1->Dx > e2->Dx ))
{
result = AddOutPt(e1, Pt);
e2->OutIdx = e1->OutIdx;
e1->Side = esLeft;
e2->Side = esRight;
e = e1;
if (e->PrevInAEL == e2)
prevE = e2->PrevInAEL;
else
prevE = e->PrevInAEL;
} else
{
result = AddOutPt(e2, Pt);
e1->OutIdx = e2->OutIdx;
e1->Side = esRight;
e2->Side = esLeft;
e = e2;
if (e->PrevInAEL == e1)
prevE = e1->PrevInAEL;
else
prevE = e->PrevInAEL;
}
if (prevE && prevE->OutIdx >= 0 && prevE->Top.Y < Pt.Y && e->Top.Y < Pt.Y)
{
cInt xPrev = TopX(*prevE, Pt.Y);
cInt xE = TopX(*e, Pt.Y);
if (xPrev == xE && (e->WindDelta != 0) && (prevE->WindDelta != 0) &&
SlopesEqual(IntPoint(xPrev, Pt.Y), prevE->Top, IntPoint(xE, Pt.Y), e->Top, m_UseFullRange))
{
OutPt* outPt = AddOutPt(prevE, Pt);
AddJoin(result, outPt, e->Top);
}
}
return result;
}
//------------------------------------------------------------------------------
void Clipper::AddLocalMaxPoly(TEdge *e1, TEdge *e2, const IntPoint &Pt)
{
AddOutPt( e1, Pt );
if (e2->WindDelta == 0) AddOutPt(e2, Pt);
if( e1->OutIdx == e2->OutIdx )
{
e1->OutIdx = Unassigned;
e2->OutIdx = Unassigned;
}
else if (e1->OutIdx < e2->OutIdx)
AppendPolygon(e1, e2);
else
AppendPolygon(e2, e1);
}
//------------------------------------------------------------------------------
void Clipper::AddEdgeToSEL(TEdge *edge)
{
//SEL pointers in PEdge are reused to build a list of horizontal edges.
//However, we don't need to worry about order with horizontal edge processing.
if( !m_SortedEdges )
{
m_SortedEdges = edge;
edge->PrevInSEL = 0;
edge->NextInSEL = 0;
}
else
{
edge->NextInSEL = m_SortedEdges;
edge->PrevInSEL = 0;
m_SortedEdges->PrevInSEL = edge;
m_SortedEdges = edge;
}
}
//------------------------------------------------------------------------------
bool Clipper::PopEdgeFromSEL(TEdge *&edge)
{
if (!m_SortedEdges) return false;
edge = m_SortedEdges;
DeleteFromSEL(m_SortedEdges);
return true;
}
//------------------------------------------------------------------------------
void Clipper::CopyAELToSEL()
{
TEdge* e = m_ActiveEdges;
m_SortedEdges = e;
while ( e )
{
e->PrevInSEL = e->PrevInAEL;
e->NextInSEL = e->NextInAEL;
e = e->NextInAEL;
}
}
//------------------------------------------------------------------------------
void Clipper::AddJoin(OutPt *op1, OutPt *op2, const IntPoint OffPt)
{
Join* j = new Join;
j->OutPt1 = op1;
j->OutPt2 = op2;
j->OffPt = OffPt;
m_Joins.push_back(j);
}
//------------------------------------------------------------------------------
void Clipper::ClearJoins()
{
for (JoinList::size_type i = 0; i < m_Joins.size(); i++)
delete m_Joins[i];
m_Joins.resize(0);
}
//------------------------------------------------------------------------------
void Clipper::ClearGhostJoins()
{
for (JoinList::size_type i = 0; i < m_GhostJoins.size(); i++)
delete m_GhostJoins[i];
m_GhostJoins.resize(0);
}
//------------------------------------------------------------------------------
void Clipper::AddGhostJoin(OutPt *op, const IntPoint OffPt)
{
Join* j = new Join;
j->OutPt1 = op;
j->OutPt2 = 0;
j->OffPt = OffPt;
m_GhostJoins.push_back(j);
}
//------------------------------------------------------------------------------
void Clipper::InsertLocalMinimaIntoAEL(const cInt botY)
{
const LocalMinimum *lm;
while (PopLocalMinima(botY, lm))
{
TEdge* lb = lm->LeftBound;
TEdge* rb = lm->RightBound;
OutPt *Op1 = 0;
if (!lb)
{
//nb: don't insert LB into either AEL or SEL
InsertEdgeIntoAEL(rb, 0);
SetWindingCount(*rb);
if (IsContributing(*rb))
Op1 = AddOutPt(rb, rb->Bot);
}
else if (!rb)
{
InsertEdgeIntoAEL(lb, 0);
SetWindingCount(*lb);
if (IsContributing(*lb))
Op1 = AddOutPt(lb, lb->Bot);
InsertScanbeam(lb->Top.Y);
}
else
{
InsertEdgeIntoAEL(lb, 0);
InsertEdgeIntoAEL(rb, lb);
SetWindingCount( *lb );
rb->WindCnt = lb->WindCnt;
rb->WindCnt2 = lb->WindCnt2;
if (IsContributing(*lb))
Op1 = AddLocalMinPoly(lb, rb, lb->Bot);
InsertScanbeam(lb->Top.Y);
}
if (rb)
{
if (IsHorizontal(*rb))
{
AddEdgeToSEL(rb);
if (rb->NextInLML)
InsertScanbeam(rb->NextInLML->Top.Y);
}
else InsertScanbeam( rb->Top.Y );
}
if (!lb || !rb) continue;
//if any output polygons share an edge, they'll need joining later ...
if (Op1 && IsHorizontal(*rb) &&
m_GhostJoins.size() > 0 && (rb->WindDelta != 0))
{
for (JoinList::size_type i = 0; i < m_GhostJoins.size(); ++i)
{
Join* jr = m_GhostJoins[i];
//if the horizontal Rb and a 'ghost' horizontal overlap, then convert
//the 'ghost' join to a real join ready for later ...
if (HorzSegmentsOverlap(jr->OutPt1->Pt.X, jr->OffPt.X, rb->Bot.X, rb->Top.X))
AddJoin(jr->OutPt1, Op1, jr->OffPt);
}
}
if (lb->OutIdx >= 0 && lb->PrevInAEL &&
lb->PrevInAEL->Curr.X == lb->Bot.X &&
lb->PrevInAEL->OutIdx >= 0 &&
SlopesEqual(lb->PrevInAEL->Bot, lb->PrevInAEL->Top, lb->Curr, lb->Top, m_UseFullRange) &&
(lb->WindDelta != 0) && (lb->PrevInAEL->WindDelta != 0))
{
OutPt *Op2 = AddOutPt(lb->PrevInAEL, lb->Bot);
AddJoin(Op1, Op2, lb->Top);
}
if(lb->NextInAEL != rb)
{
if (rb->OutIdx >= 0 && rb->PrevInAEL->OutIdx >= 0 &&
SlopesEqual(rb->PrevInAEL->Curr, rb->PrevInAEL->Top, rb->Curr, rb->Top, m_UseFullRange) &&
(rb->WindDelta != 0) && (rb->PrevInAEL->WindDelta != 0))
{
OutPt *Op2 = AddOutPt(rb->PrevInAEL, rb->Bot);
AddJoin(Op1, Op2, rb->Top);
}
TEdge* e = lb->NextInAEL;
if (e)
{
while( e != rb )
{
//nb: For calculating winding counts etc, IntersectEdges() assumes
//that param1 will be to the Right of param2 ABOVE the intersection ...
IntersectEdges(rb , e , lb->Curr); //order important here
e = e->NextInAEL;
}
}
}
}
}
//------------------------------------------------------------------------------
void Clipper::DeleteFromSEL(TEdge *e)
{
TEdge* SelPrev = e->PrevInSEL;
TEdge* SelNext = e->NextInSEL;
if( !SelPrev && !SelNext && (e != m_SortedEdges) ) return; //already deleted
if( SelPrev ) SelPrev->NextInSEL = SelNext;
else m_SortedEdges = SelNext;
if( SelNext ) SelNext->PrevInSEL = SelPrev;
e->NextInSEL = 0;
e->PrevInSEL = 0;
}
//------------------------------------------------------------------------------
#ifdef use_xyz
void Clipper::SetZ(IntPoint& pt, TEdge& e1, TEdge& e2)
{
if (pt.Z != 0 || !m_ZFill) return;
else if (pt == e1.Bot) pt.Z = e1.Bot.Z;
else if (pt == e1.Top) pt.Z = e1.Top.Z;
else if (pt == e2.Bot) pt.Z = e2.Bot.Z;
else if (pt == e2.Top) pt.Z = e2.Top.Z;
else (*m_ZFill)(e1.Bot, e1.Top, e2.Bot, e2.Top, pt);
}
//------------------------------------------------------------------------------
#endif
void Clipper::IntersectEdges(TEdge *e1, TEdge *e2, IntPoint &Pt)
{
bool e1Contributing = ( e1->OutIdx >= 0 );
bool e2Contributing = ( e2->OutIdx >= 0 );
#ifdef use_xyz
SetZ(Pt, *e1, *e2);
#endif
#ifdef use_lines
//if either edge is on an OPEN path ...
if (e1->WindDelta == 0 || e2->WindDelta == 0)
{
//ignore subject-subject open path intersections UNLESS they
//are both open paths, AND they are both 'contributing maximas' ...
if (e1->WindDelta == 0 && e2->WindDelta == 0) return;
//if intersecting a subj line with a subj poly ...
else if (e1->PolyTyp == e2->PolyTyp &&
e1->WindDelta != e2->WindDelta && m_ClipType == ctUnion)
{
if (e1->WindDelta == 0)
{
if (e2Contributing)
{
AddOutPt(e1, Pt);
if (e1Contributing) e1->OutIdx = Unassigned;
}
}
else
{
if (e1Contributing)
{
AddOutPt(e2, Pt);
if (e2Contributing) e2->OutIdx = Unassigned;
}
}
}
else if (e1->PolyTyp != e2->PolyTyp)
{
//toggle subj open path OutIdx on/off when Abs(clip.WndCnt) == 1 ...
if ((e1->WindDelta == 0) && abs(e2->WindCnt) == 1 &&
(m_ClipType != ctUnion || e2->WindCnt2 == 0))
{
AddOutPt(e1, Pt);
if (e1Contributing) e1->OutIdx = Unassigned;
}
else if ((e2->WindDelta == 0) && (abs(e1->WindCnt) == 1) &&
(m_ClipType != ctUnion || e1->WindCnt2 == 0))
{
AddOutPt(e2, Pt);
if (e2Contributing) e2->OutIdx = Unassigned;
}
}
return;
}
#endif
//update winding counts...
//assumes that e1 will be to the Right of e2 ABOVE the intersection
if ( e1->PolyTyp == e2->PolyTyp )
{
if ( IsEvenOddFillType( *e1) )
{
int oldE1WindCnt = e1->WindCnt;
e1->WindCnt = e2->WindCnt;
e2->WindCnt = oldE1WindCnt;
} else
{
if (e1->WindCnt + e2->WindDelta == 0 ) e1->WindCnt = -e1->WindCnt;
else e1->WindCnt += e2->WindDelta;
if ( e2->WindCnt - e1->WindDelta == 0 ) e2->WindCnt = -e2->WindCnt;
else e2->WindCnt -= e1->WindDelta;
}
} else
{
if (!IsEvenOddFillType(*e2)) e1->WindCnt2 += e2->WindDelta;
else e1->WindCnt2 = ( e1->WindCnt2 == 0 ) ? 1 : 0;
if (!IsEvenOddFillType(*e1)) e2->WindCnt2 -= e1->WindDelta;
else e2->WindCnt2 = ( e2->WindCnt2 == 0 ) ? 1 : 0;
}
PolyFillType e1FillType, e2FillType, e1FillType2, e2FillType2;
if (e1->PolyTyp == ptSubject)
{
e1FillType = m_SubjFillType;
e1FillType2 = m_ClipFillType;
} else
{
e1FillType = m_ClipFillType;
e1FillType2 = m_SubjFillType;
}
if (e2->PolyTyp == ptSubject)
{
e2FillType = m_SubjFillType;
e2FillType2 = m_ClipFillType;
} else
{
e2FillType = m_ClipFillType;
e2FillType2 = m_SubjFillType;
}
cInt e1Wc, e2Wc;
switch (e1FillType)
{
case pftPositive: e1Wc = e1->WindCnt; break;
case pftNegative: e1Wc = -e1->WindCnt; break;
default: e1Wc = Abs(e1->WindCnt);
}
switch(e2FillType)
{
case pftPositive: e2Wc = e2->WindCnt; break;
case pftNegative: e2Wc = -e2->WindCnt; break;
default: e2Wc = Abs(e2->WindCnt);
}
if ( e1Contributing && e2Contributing )
{
if ((e1Wc != 0 && e1Wc != 1) || (e2Wc != 0 && e2Wc != 1) ||
(e1->PolyTyp != e2->PolyTyp && m_ClipType != ctXor) )
{
AddLocalMaxPoly(e1, e2, Pt);
}
else
{
AddOutPt(e1, Pt);
AddOutPt(e2, Pt);
SwapSides( *e1 , *e2 );
SwapPolyIndexes( *e1 , *e2 );
}
}
else if ( e1Contributing )
{
if (e2Wc == 0 || e2Wc == 1)
{
AddOutPt(e1, Pt);
SwapSides(*e1, *e2);
SwapPolyIndexes(*e1, *e2);
}
}
else if ( e2Contributing )
{
if (e1Wc == 0 || e1Wc == 1)
{
AddOutPt(e2, Pt);
SwapSides(*e1, *e2);
SwapPolyIndexes(*e1, *e2);
}
}
else if ( (e1Wc == 0 || e1Wc == 1) && (e2Wc == 0 || e2Wc == 1))
{
//neither edge is currently contributing ...
cInt e1Wc2, e2Wc2;
switch (e1FillType2)
{
case pftPositive: e1Wc2 = e1->WindCnt2; break;
case pftNegative : e1Wc2 = -e1->WindCnt2; break;
default: e1Wc2 = Abs(e1->WindCnt2);
}
switch (e2FillType2)
{
case pftPositive: e2Wc2 = e2->WindCnt2; break;
case pftNegative: e2Wc2 = -e2->WindCnt2; break;
default: e2Wc2 = Abs(e2->WindCnt2);
}
if (e1->PolyTyp != e2->PolyTyp)
{
AddLocalMinPoly(e1, e2, Pt);
}
else if (e1Wc == 1 && e2Wc == 1)
switch( m_ClipType ) {
case ctIntersection:
if (e1Wc2 > 0 && e2Wc2 > 0)
AddLocalMinPoly(e1, e2, Pt);
break;
case ctUnion:
if ( e1Wc2 <= 0 && e2Wc2 <= 0 )
AddLocalMinPoly(e1, e2, Pt);
break;
case ctDifference:
if (((e1->PolyTyp == ptClip) && (e1Wc2 > 0) && (e2Wc2 > 0)) ||
((e1->PolyTyp == ptSubject) && (e1Wc2 <= 0) && (e2Wc2 <= 0)))
AddLocalMinPoly(e1, e2, Pt);
break;
case ctXor:
AddLocalMinPoly(e1, e2, Pt);
}
else
SwapSides( *e1, *e2 );
}
}
//------------------------------------------------------------------------------
void Clipper::SetHoleState(TEdge *e, OutRec *outrec)
{
TEdge *e2 = e->PrevInAEL;
TEdge *eTmp = 0;
while (e2)
{
if (e2->OutIdx >= 0 && e2->WindDelta != 0)
{
if (!eTmp) eTmp = e2;
else if (eTmp->OutIdx == e2->OutIdx) eTmp = 0;
}
e2 = e2->PrevInAEL;
}
if (!eTmp)
{
outrec->FirstLeft = 0;
outrec->IsHole = false;
}
else
{
outrec->FirstLeft = m_PolyOuts[eTmp->OutIdx];
outrec->IsHole = !outrec->FirstLeft->IsHole;
}
}
//------------------------------------------------------------------------------
OutRec* GetLowermostRec(OutRec *outRec1, OutRec *outRec2)
{
//work out which polygon fragment has the correct hole state ...
if (!outRec1->BottomPt)
outRec1->BottomPt = GetBottomPt(outRec1->Pts);
if (!outRec2->BottomPt)
outRec2->BottomPt = GetBottomPt(outRec2->Pts);
OutPt *OutPt1 = outRec1->BottomPt;
OutPt *OutPt2 = outRec2->BottomPt;
if (OutPt1->Pt.Y > OutPt2->Pt.Y) return outRec1;
else if (OutPt1->Pt.Y < OutPt2->Pt.Y) return outRec2;
else if (OutPt1->Pt.X < OutPt2->Pt.X) return outRec1;
else if (OutPt1->Pt.X > OutPt2->Pt.X) return outRec2;
else if (OutPt1->Next == OutPt1) return outRec2;
else if (OutPt2->Next == OutPt2) return outRec1;
else if (FirstIsBottomPt(OutPt1, OutPt2)) return outRec1;
else return outRec2;
}
//------------------------------------------------------------------------------
bool OutRec1RightOfOutRec2(OutRec* outRec1, OutRec* outRec2)
{
do
{
outRec1 = outRec1->FirstLeft;
if (outRec1 == outRec2) return true;
} while (outRec1);
return false;
}
//------------------------------------------------------------------------------
OutRec* Clipper::GetOutRec(int Idx)
{
OutRec* outrec = m_PolyOuts[Idx];
while (outrec != m_PolyOuts[outrec->Idx])
outrec = m_PolyOuts[outrec->Idx];
return outrec;
}
//------------------------------------------------------------------------------
void Clipper::AppendPolygon(TEdge *e1, TEdge *e2)
{
//get the start and ends of both output polygons ...
OutRec *outRec1 = m_PolyOuts[e1->OutIdx];
OutRec *outRec2 = m_PolyOuts[e2->OutIdx];
OutRec *holeStateRec;
if (OutRec1RightOfOutRec2(outRec1, outRec2))
holeStateRec = outRec2;
else if (OutRec1RightOfOutRec2(outRec2, outRec1))
holeStateRec = outRec1;
else
holeStateRec = GetLowermostRec(outRec1, outRec2);
//get the start and ends of both output polygons and
//join e2 poly onto e1 poly and delete pointers to e2 ...
OutPt* p1_lft = outRec1->Pts;
OutPt* p1_rt = p1_lft->Prev;
OutPt* p2_lft = outRec2->Pts;
OutPt* p2_rt = p2_lft->Prev;
//join e2 poly onto e1 poly and delete pointers to e2 ...
if( e1->Side == esLeft )
{
if( e2->Side == esLeft )
{
//z y x a b c
ReversePolyPtLinks(p2_lft);
p2_lft->Next = p1_lft;
p1_lft->Prev = p2_lft;
p1_rt->Next = p2_rt;
p2_rt->Prev = p1_rt;
outRec1->Pts = p2_rt;
} else
{
//x y z a b c
p2_rt->Next = p1_lft;
p1_lft->Prev = p2_rt;
p2_lft->Prev = p1_rt;
p1_rt->Next = p2_lft;
outRec1->Pts = p2_lft;
}
} else
{
if( e2->Side == esRight )
{
//a b c z y x
ReversePolyPtLinks(p2_lft);
p1_rt->Next = p2_rt;
p2_rt->Prev = p1_rt;
p2_lft->Next = p1_lft;
p1_lft->Prev = p2_lft;
} else
{
//a b c x y z
p1_rt->Next = p2_lft;
p2_lft->Prev = p1_rt;
p1_lft->Prev = p2_rt;
p2_rt->Next = p1_lft;
}
}
outRec1->BottomPt = 0;
if (holeStateRec == outRec2)
{
if (outRec2->FirstLeft != outRec1)
outRec1->FirstLeft = outRec2->FirstLeft;
outRec1->IsHole = outRec2->IsHole;
}
outRec2->Pts = 0;
outRec2->BottomPt = 0;
outRec2->FirstLeft = outRec1;
int OKIdx = e1->OutIdx;
int ObsoleteIdx = e2->OutIdx;
e1->OutIdx = Unassigned; //nb: safe because we only get here via AddLocalMaxPoly
e2->OutIdx = Unassigned;
TEdge* e = m_ActiveEdges;
while( e )
{
if( e->OutIdx == ObsoleteIdx )
{
e->OutIdx = OKIdx;
e->Side = e1->Side;
break;
}
e = e->NextInAEL;
}
outRec2->Idx = outRec1->Idx;
}
//------------------------------------------------------------------------------
OutPt* Clipper::AddOutPt(TEdge *e, const IntPoint &pt)
{
if( e->OutIdx < 0 )
{
OutRec *outRec = CreateOutRec();
outRec->IsOpen = (e->WindDelta == 0);
OutPt* newOp = new OutPt;
outRec->Pts = newOp;
newOp->Idx = outRec->Idx;
newOp->Pt = pt;
newOp->Next = newOp;
newOp->Prev = newOp;
if (!outRec->IsOpen)
SetHoleState(e, outRec);
e->OutIdx = outRec->Idx;
return newOp;
} else
{
OutRec *outRec = m_PolyOuts[e->OutIdx];
//OutRec.Pts is the 'Left-most' point & OutRec.Pts.Prev is the 'Right-most'
OutPt* op = outRec->Pts;
bool ToFront = (e->Side == esLeft);
if (ToFront && (pt == op->Pt)) return op;
else if (!ToFront && (pt == op->Prev->Pt)) return op->Prev;
OutPt* newOp = new OutPt;
newOp->Idx = outRec->Idx;
newOp->Pt = pt;
newOp->Next = op;
newOp->Prev = op->Prev;
newOp->Prev->Next = newOp;
op->Prev = newOp;
if (ToFront) outRec->Pts = newOp;
return newOp;
}
}
//------------------------------------------------------------------------------
OutPt* Clipper::GetLastOutPt(TEdge *e)
{
OutRec *outRec = m_PolyOuts[e->OutIdx];
if (e->Side == esLeft)
return outRec->Pts;
else
return outRec->Pts->Prev;
}
//------------------------------------------------------------------------------
void Clipper::ProcessHorizontals()
{
TEdge* horzEdge;
while (PopEdgeFromSEL(horzEdge))
ProcessHorizontal(horzEdge);
}
//------------------------------------------------------------------------------
inline bool IsMinima(TEdge *e)
{
return e && (e->Prev->NextInLML != e) && (e->Next->NextInLML != e);
}
//------------------------------------------------------------------------------
inline bool IsMaxima(TEdge *e, const cInt Y)
{
return e && e->Top.Y == Y && !e->NextInLML;
}
//------------------------------------------------------------------------------
inline bool IsIntermediate(TEdge *e, const cInt Y)
{
return e->Top.Y == Y && e->NextInLML;
}
//------------------------------------------------------------------------------
TEdge *GetMaximaPair(TEdge *e)
{
if ((e->Next->Top == e->Top) && !e->Next->NextInLML)
return e->Next;
else if ((e->Prev->Top == e->Top) && !e->Prev->NextInLML)
return e->Prev;
else return 0;
}
//------------------------------------------------------------------------------
TEdge *GetMaximaPairEx(TEdge *e)
{
//as GetMaximaPair() but returns 0 if MaxPair isn't in AEL (unless it's horizontal)
TEdge* result = GetMaximaPair(e);
if (result && (result->OutIdx == Skip ||
(result->NextInAEL == result->PrevInAEL && !IsHorizontal(*result)))) return 0;
return result;
}
//------------------------------------------------------------------------------
void Clipper::SwapPositionsInSEL(TEdge *Edge1, TEdge *Edge2)
{
if( !( Edge1->NextInSEL ) && !( Edge1->PrevInSEL ) ) return;
if( !( Edge2->NextInSEL ) && !( Edge2->PrevInSEL ) ) return;
if( Edge1->NextInSEL == Edge2 )
{
TEdge* Next = Edge2->NextInSEL;
if( Next ) Next->PrevInSEL = Edge1;
TEdge* Prev = Edge1->PrevInSEL;
if( Prev ) Prev->NextInSEL = Edge2;
Edge2->PrevInSEL = Prev;
Edge2->NextInSEL = Edge1;
Edge1->PrevInSEL = Edge2;
Edge1->NextInSEL = Next;
}
else if( Edge2->NextInSEL == Edge1 )
{
TEdge* Next = Edge1->NextInSEL;
if( Next ) Next->PrevInSEL = Edge2;
TEdge* Prev = Edge2->PrevInSEL;
if( Prev ) Prev->NextInSEL = Edge1;
Edge1->PrevInSEL = Prev;
Edge1->NextInSEL = Edge2;
Edge2->PrevInSEL = Edge1;
Edge2->NextInSEL = Next;
}
else
{
TEdge* Next = Edge1->NextInSEL;
TEdge* Prev = Edge1->PrevInSEL;
Edge1->NextInSEL = Edge2->NextInSEL;
if( Edge1->NextInSEL ) Edge1->NextInSEL->PrevInSEL = Edge1;
Edge1->PrevInSEL = Edge2->PrevInSEL;
if( Edge1->PrevInSEL ) Edge1->PrevInSEL->NextInSEL = Edge1;
Edge2->NextInSEL = Next;
if( Edge2->NextInSEL ) Edge2->NextInSEL->PrevInSEL = Edge2;
Edge2->PrevInSEL = Prev;
if( Edge2->PrevInSEL ) Edge2->PrevInSEL->NextInSEL = Edge2;
}
if( !Edge1->PrevInSEL ) m_SortedEdges = Edge1;
else if( !Edge2->PrevInSEL ) m_SortedEdges = Edge2;
}
//------------------------------------------------------------------------------
TEdge* GetNextInAEL(TEdge *e, Direction dir)
{
return dir == dLeftToRight ? e->NextInAEL : e->PrevInAEL;
}
//------------------------------------------------------------------------------
void GetHorzDirection(TEdge& HorzEdge, Direction& Dir, cInt& Left, cInt& Right)
{
if (HorzEdge.Bot.X < HorzEdge.Top.X)
{
Left = HorzEdge.Bot.X;
Right = HorzEdge.Top.X;
Dir = dLeftToRight;
} else
{
Left = HorzEdge.Top.X;
Right = HorzEdge.Bot.X;
Dir = dRightToLeft;
}
}
//------------------------------------------------------------------------
/*******************************************************************************
* Notes: Horizontal edges (HEs) at scanline intersections (ie at the Top or *
* Bottom of a scanbeam) are processed as if layered. The order in which HEs *
* are processed doesn't matter. HEs intersect with other HE Bot.Xs only [#] *
* (or they could intersect with Top.Xs only, ie EITHER Bot.Xs OR Top.Xs), *
* and with other non-horizontal edges [*]. Once these intersections are *
* processed, intermediate HEs then 'promote' the Edge above (NextInLML) into *
* the AEL. These 'promoted' edges may in turn intersect [%] with other HEs. *
*******************************************************************************/
void Clipper::ProcessHorizontal(TEdge *horzEdge)
{
Direction dir;
cInt horzLeft, horzRight;
bool IsOpen = (horzEdge->WindDelta == 0);
GetHorzDirection(*horzEdge, dir, horzLeft, horzRight);
TEdge* eLastHorz = horzEdge, *eMaxPair = 0;
while (eLastHorz->NextInLML && IsHorizontal(*eLastHorz->NextInLML))
eLastHorz = eLastHorz->NextInLML;
if (!eLastHorz->NextInLML)
eMaxPair = GetMaximaPair(eLastHorz);
MaximaList::const_iterator maxIt;
MaximaList::const_reverse_iterator maxRit;
if (m_Maxima.size() > 0)
{
//get the first maxima in range (X) ...
if (dir == dLeftToRight)
{
maxIt = m_Maxima.begin();
while (maxIt != m_Maxima.end() && *maxIt <= horzEdge->Bot.X) maxIt++;
if (maxIt != m_Maxima.end() && *maxIt >= eLastHorz->Top.X)
maxIt = m_Maxima.end();
}
else
{
maxRit = m_Maxima.rbegin();
while (maxRit != m_Maxima.rend() && *maxRit > horzEdge->Bot.X) maxRit++;
if (maxRit != m_Maxima.rend() && *maxRit <= eLastHorz->Top.X)
maxRit = m_Maxima.rend();
}
}
OutPt* op1 = 0;
for (;;) //loop through consec. horizontal edges
{
bool IsLastHorz = (horzEdge == eLastHorz);
TEdge* e = GetNextInAEL(horzEdge, dir);
while(e)
{
//this code block inserts extra coords into horizontal edges (in output
//polygons) whereever maxima touch these horizontal edges. This helps
//'simplifying' polygons (ie if the Simplify property is set).
if (m_Maxima.size() > 0)
{
if (dir == dLeftToRight)
{
while (maxIt != m_Maxima.end() && *maxIt < e->Curr.X)
{
if (horzEdge->OutIdx >= 0 && !IsOpen)
AddOutPt(horzEdge, IntPoint(*maxIt, horzEdge->Bot.Y));
maxIt++;
}
}
else
{
while (maxRit != m_Maxima.rend() && *maxRit > e->Curr.X)
{
if (horzEdge->OutIdx >= 0 && !IsOpen)
AddOutPt(horzEdge, IntPoint(*maxRit, horzEdge->Bot.Y));
maxRit++;
}
}
};
if ((dir == dLeftToRight && e->Curr.X > horzRight) ||
(dir == dRightToLeft && e->Curr.X < horzLeft)) break;
//Also break if we've got to the end of an intermediate horizontal edge ...
//nb: Smaller Dx's are to the right of larger Dx's ABOVE the horizontal.
if (e->Curr.X == horzEdge->Top.X && horzEdge->NextInLML &&
e->Dx < horzEdge->NextInLML->Dx) break;
if (horzEdge->OutIdx >= 0 && !IsOpen) //note: may be done multiple times
{
#ifdef use_xyz
if (dir == dLeftToRight) SetZ(e->Curr, *horzEdge, *e);
else SetZ(e->Curr, *e, *horzEdge);
#endif
op1 = AddOutPt(horzEdge, e->Curr);
TEdge* eNextHorz = m_SortedEdges;
while (eNextHorz)
{
if (eNextHorz->OutIdx >= 0 &&
HorzSegmentsOverlap(horzEdge->Bot.X,
horzEdge->Top.X, eNextHorz->Bot.X, eNextHorz->Top.X))
{
OutPt* op2 = GetLastOutPt(eNextHorz);
AddJoin(op2, op1, eNextHorz->Top);
}
eNextHorz = eNextHorz->NextInSEL;
}
AddGhostJoin(op1, horzEdge->Bot);
}
//OK, so far we're still in range of the horizontal Edge but make sure
//we're at the last of consec. horizontals when matching with eMaxPair
if(e == eMaxPair && IsLastHorz)
{
if (horzEdge->OutIdx >= 0)
AddLocalMaxPoly(horzEdge, eMaxPair, horzEdge->Top);
DeleteFromAEL(horzEdge);
DeleteFromAEL(eMaxPair);
return;
}
if(dir == dLeftToRight)
{
IntPoint Pt = IntPoint(e->Curr.X, horzEdge->Curr.Y);
IntersectEdges(horzEdge, e, Pt);
}
else
{
IntPoint Pt = IntPoint(e->Curr.X, horzEdge->Curr.Y);
IntersectEdges( e, horzEdge, Pt);
}
TEdge* eNext = GetNextInAEL(e, dir);
SwapPositionsInAEL( horzEdge, e );
e = eNext;
} //end while(e)
//Break out of loop if HorzEdge.NextInLML is not also horizontal ...
if (!horzEdge->NextInLML || !IsHorizontal(*horzEdge->NextInLML)) break;
UpdateEdgeIntoAEL(horzEdge);
if (horzEdge->OutIdx >= 0) AddOutPt(horzEdge, horzEdge->Bot);
GetHorzDirection(*horzEdge, dir, horzLeft, horzRight);
} //end for (;;)
if (horzEdge->OutIdx >= 0 && !op1)
{
op1 = GetLastOutPt(horzEdge);
TEdge* eNextHorz = m_SortedEdges;
while (eNextHorz)
{
if (eNextHorz->OutIdx >= 0 &&
HorzSegmentsOverlap(horzEdge->Bot.X,
horzEdge->Top.X, eNextHorz->Bot.X, eNextHorz->Top.X))
{
OutPt* op2 = GetLastOutPt(eNextHorz);
AddJoin(op2, op1, eNextHorz->Top);
}
eNextHorz = eNextHorz->NextInSEL;
}
AddGhostJoin(op1, horzEdge->Top);
}
if (horzEdge->NextInLML)
{
if(horzEdge->OutIdx >= 0)
{
op1 = AddOutPt( horzEdge, horzEdge->Top);
UpdateEdgeIntoAEL(horzEdge);
if (horzEdge->WindDelta == 0) return;
//nb: HorzEdge is no longer horizontal here
TEdge* ePrev = horzEdge->PrevInAEL;
TEdge* eNext = horzEdge->NextInAEL;
if (ePrev && ePrev->Curr.X == horzEdge->Bot.X &&
ePrev->Curr.Y == horzEdge->Bot.Y && ePrev->WindDelta != 0 &&
(ePrev->OutIdx >= 0 && ePrev->Curr.Y > ePrev->Top.Y &&
SlopesEqual(*horzEdge, *ePrev, m_UseFullRange)))
{
OutPt* op2 = AddOutPt(ePrev, horzEdge->Bot);
AddJoin(op1, op2, horzEdge->Top);
}
else if (eNext && eNext->Curr.X == horzEdge->Bot.X &&
eNext->Curr.Y == horzEdge->Bot.Y && eNext->WindDelta != 0 &&
eNext->OutIdx >= 0 && eNext->Curr.Y > eNext->Top.Y &&
SlopesEqual(*horzEdge, *eNext, m_UseFullRange))
{
OutPt* op2 = AddOutPt(eNext, horzEdge->Bot);
AddJoin(op1, op2, horzEdge->Top);
}
}
else
UpdateEdgeIntoAEL(horzEdge);
}
else
{
if (horzEdge->OutIdx >= 0) AddOutPt(horzEdge, horzEdge->Top);
DeleteFromAEL(horzEdge);
}
}
//------------------------------------------------------------------------------
bool Clipper::ProcessIntersections(const cInt topY)
{
if( !m_ActiveEdges ) return true;
try {
BuildIntersectList(topY);
size_t IlSize = m_IntersectList.size();
if (IlSize == 0) return true;
if (IlSize == 1 || FixupIntersectionOrder()) ProcessIntersectList();
else return false;
}
catch(...)
{
m_SortedEdges = 0;
DisposeIntersectNodes();
throw clipperException("ProcessIntersections error");
}
m_SortedEdges = 0;
return true;
}
//------------------------------------------------------------------------------
void Clipper::DisposeIntersectNodes()
{
for (size_t i = 0; i < m_IntersectList.size(); ++i )
delete m_IntersectList[i];
m_IntersectList.clear();
}
//------------------------------------------------------------------------------
void Clipper::BuildIntersectList(const cInt topY)
{
if ( !m_ActiveEdges ) return;
//prepare for sorting ...
TEdge* e = m_ActiveEdges;
m_SortedEdges = e;
while( e )
{
e->PrevInSEL = e->PrevInAEL;
e->NextInSEL = e->NextInAEL;
e->Curr.X = TopX( *e, topY );
e = e->NextInAEL;
}
//bubblesort ...
bool isModified;
do
{
isModified = false;
e = m_SortedEdges;
while( e->NextInSEL )
{
TEdge *eNext = e->NextInSEL;
IntPoint Pt;
if(e->Curr.X > eNext->Curr.X)
{
IntersectPoint(*e, *eNext, Pt);
if (Pt.Y < topY) Pt = IntPoint(TopX(*e, topY), topY);
IntersectNode * newNode = new IntersectNode;
newNode->Edge1 = e;
newNode->Edge2 = eNext;
newNode->Pt = Pt;
m_IntersectList.push_back(newNode);
SwapPositionsInSEL(e, eNext);
isModified = true;
}
else
e = eNext;
}
if( e->PrevInSEL ) e->PrevInSEL->NextInSEL = 0;
else break;
}
while ( isModified );
m_SortedEdges = 0; //important
}
//------------------------------------------------------------------------------
void Clipper::ProcessIntersectList()
{
for (size_t i = 0; i < m_IntersectList.size(); ++i)
{
IntersectNode* iNode = m_IntersectList[i];
{
IntersectEdges( iNode->Edge1, iNode->Edge2, iNode->Pt);
SwapPositionsInAEL( iNode->Edge1 , iNode->Edge2 );
}
delete iNode;
}
m_IntersectList.clear();
}
//------------------------------------------------------------------------------
bool IntersectListSort(IntersectNode* node1, IntersectNode* node2)
{
return node2->Pt.Y < node1->Pt.Y;
}
//------------------------------------------------------------------------------
inline bool EdgesAdjacent(const IntersectNode &inode)
{
return (inode.Edge1->NextInSEL == inode.Edge2) ||
(inode.Edge1->PrevInSEL == inode.Edge2);
}
//------------------------------------------------------------------------------
bool Clipper::FixupIntersectionOrder()
{
//pre-condition: intersections are sorted Bottom-most first.
//Now it's crucial that intersections are made only between adjacent edges,
//so to ensure this the order of intersections may need adjusting ...
CopyAELToSEL();
std::sort(m_IntersectList.begin(), m_IntersectList.end(), IntersectListSort);
size_t cnt = m_IntersectList.size();
for (size_t i = 0; i < cnt; ++i)
{
if (!EdgesAdjacent(*m_IntersectList[i]))
{
size_t j = i + 1;
while (j < cnt && !EdgesAdjacent(*m_IntersectList[j])) j++;
if (j == cnt) return false;
std::swap(m_IntersectList[i], m_IntersectList[j]);
}
SwapPositionsInSEL(m_IntersectList[i]->Edge1, m_IntersectList[i]->Edge2);
}
return true;
}
//------------------------------------------------------------------------------
void Clipper::DoMaxima(TEdge *e)
{
TEdge* eMaxPair = GetMaximaPairEx(e);
if (!eMaxPair)
{
if (e->OutIdx >= 0)
AddOutPt(e, e->Top);
DeleteFromAEL(e);
return;
}
TEdge* eNext = e->NextInAEL;
while(eNext && eNext != eMaxPair)
{
IntersectEdges(e, eNext, e->Top);
SwapPositionsInAEL(e, eNext);
eNext = e->NextInAEL;
}
if(e->OutIdx == Unassigned && eMaxPair->OutIdx == Unassigned)
{
DeleteFromAEL(e);
DeleteFromAEL(eMaxPair);
}
else if( e->OutIdx >= 0 && eMaxPair->OutIdx >= 0 )
{
if (e->OutIdx >= 0) AddLocalMaxPoly(e, eMaxPair, e->Top);
DeleteFromAEL(e);
DeleteFromAEL(eMaxPair);
}
#ifdef use_lines
else if (e->WindDelta == 0)
{
if (e->OutIdx >= 0)
{
AddOutPt(e, e->Top);
e->OutIdx = Unassigned;
}
DeleteFromAEL(e);
if (eMaxPair->OutIdx >= 0)
{
AddOutPt(eMaxPair, e->Top);
eMaxPair->OutIdx = Unassigned;
}
DeleteFromAEL(eMaxPair);
}
#endif
else throw clipperException("DoMaxima error");
}
//------------------------------------------------------------------------------
void Clipper::ProcessEdgesAtTopOfScanbeam(const cInt topY)
{
TEdge* e = m_ActiveEdges;
while( e )
{
//1. process maxima, treating them as if they're 'bent' horizontal edges,
// but exclude maxima with horizontal edges. nb: e can't be a horizontal.
bool IsMaximaEdge = IsMaxima(e, topY);
if(IsMaximaEdge)
{
TEdge* eMaxPair = GetMaximaPairEx(e);
IsMaximaEdge = (!eMaxPair || !IsHorizontal(*eMaxPair));
}
if(IsMaximaEdge)
{
if (m_StrictSimple) m_Maxima.push_back(e->Top.X);
TEdge* ePrev = e->PrevInAEL;
DoMaxima(e);
if( !ePrev ) e = m_ActiveEdges;
else e = ePrev->NextInAEL;
}
else
{
//2. promote horizontal edges, otherwise update Curr.X and Curr.Y ...
if (IsIntermediate(e, topY) && IsHorizontal(*e->NextInLML))
{
UpdateEdgeIntoAEL(e);
if (e->OutIdx >= 0)
AddOutPt(e, e->Bot);
AddEdgeToSEL(e);
}
else
{
e->Curr.X = TopX( *e, topY );
e->Curr.Y = topY;
#ifdef use_xyz
e->Curr.Z = topY == e->Top.Y ? e->Top.Z : (topY == e->Bot.Y ? e->Bot.Z : 0);
#endif
}
//When StrictlySimple and 'e' is being touched by another edge, then
//make sure both edges have a vertex here ...
if (m_StrictSimple)
{
TEdge* ePrev = e->PrevInAEL;
if ((e->OutIdx >= 0) && (e->WindDelta != 0) && ePrev && (ePrev->OutIdx >= 0) &&
(ePrev->Curr.X == e->Curr.X) && (ePrev->WindDelta != 0))
{
IntPoint pt = e->Curr;
#ifdef use_xyz
SetZ(pt, *ePrev, *e);
#endif
OutPt* op = AddOutPt(ePrev, pt);
OutPt* op2 = AddOutPt(e, pt);
AddJoin(op, op2, pt); //StrictlySimple (type-3) join
}
}
e = e->NextInAEL;
}
}
//3. Process horizontals at the Top of the scanbeam ...
m_Maxima.sort();
ProcessHorizontals();
m_Maxima.clear();
//4. Promote intermediate vertices ...
e = m_ActiveEdges;
while(e)
{
if(IsIntermediate(e, topY))
{
OutPt* op = 0;
if( e->OutIdx >= 0 )
op = AddOutPt(e, e->Top);
UpdateEdgeIntoAEL(e);
//if output polygons share an edge, they'll need joining later ...
TEdge* ePrev = e->PrevInAEL;
TEdge* eNext = e->NextInAEL;
if (ePrev && ePrev->Curr.X == e->Bot.X &&
ePrev->Curr.Y == e->Bot.Y && op &&
ePrev->OutIdx >= 0 && ePrev->Curr.Y > ePrev->Top.Y &&
SlopesEqual(e->Curr, e->Top, ePrev->Curr, ePrev->Top, m_UseFullRange) &&
(e->WindDelta != 0) && (ePrev->WindDelta != 0))
{
OutPt* op2 = AddOutPt(ePrev, e->Bot);
AddJoin(op, op2, e->Top);
}
else if (eNext && eNext->Curr.X == e->Bot.X &&
eNext->Curr.Y == e->Bot.Y && op &&
eNext->OutIdx >= 0 && eNext->Curr.Y > eNext->Top.Y &&
SlopesEqual(e->Curr, e->Top, eNext->Curr, eNext->Top, m_UseFullRange) &&
(e->WindDelta != 0) && (eNext->WindDelta != 0))
{
OutPt* op2 = AddOutPt(eNext, e->Bot);
AddJoin(op, op2, e->Top);
}
}
e = e->NextInAEL;
}
}
//------------------------------------------------------------------------------
void Clipper::FixupOutPolyline(OutRec &outrec)
{
OutPt *pp = outrec.Pts;
OutPt *lastPP = pp->Prev;
while (pp != lastPP)
{
pp = pp->Next;
if (pp->Pt == pp->Prev->Pt)
{
if (pp == lastPP) lastPP = pp->Prev;
OutPt *tmpPP = pp->Prev;
tmpPP->Next = pp->Next;
pp->Next->Prev = tmpPP;
delete pp;
pp = tmpPP;
}
}
if (pp == pp->Prev)
{
DisposeOutPts(pp);
outrec.Pts = 0;
return;
}
}
//------------------------------------------------------------------------------
void Clipper::FixupOutPolygon(OutRec &outrec)
{
//FixupOutPolygon() - removes duplicate points and simplifies consecutive
//parallel edges by removing the middle vertex.
OutPt *lastOK = 0;
outrec.BottomPt = 0;
OutPt *pp = outrec.Pts;
bool preserveCol = m_PreserveCollinear || m_StrictSimple;
for (;;)
{
if (pp->Prev == pp || pp->Prev == pp->Next)
{
DisposeOutPts(pp);
outrec.Pts = 0;
return;
}
//test for duplicate points and collinear edges ...
if ((pp->Pt == pp->Next->Pt) || (pp->Pt == pp->Prev->Pt) ||
(SlopesEqual(pp->Prev->Pt, pp->Pt, pp->Next->Pt, m_UseFullRange) &&
(!preserveCol || !Pt2IsBetweenPt1AndPt3(pp->Prev->Pt, pp->Pt, pp->Next->Pt))))
{
lastOK = 0;
OutPt *tmp = pp;
pp->Prev->Next = pp->Next;
pp->Next->Prev = pp->Prev;
pp = pp->Prev;
delete tmp;
}
else if (pp == lastOK) break;
else
{
if (!lastOK) lastOK = pp;
pp = pp->Next;
}
}
outrec.Pts = pp;
}
//------------------------------------------------------------------------------
int PointCount(OutPt *Pts)
{
if (!Pts) return 0;
int result = 0;
OutPt* p = Pts;
do
{
result++;
p = p->Next;
}
while (p != Pts);
return result;
}
//------------------------------------------------------------------------------
void Clipper::BuildResult(Paths &polys)
{
polys.reserve(m_PolyOuts.size());
for (PolyOutList::size_type i = 0; i < m_PolyOuts.size(); ++i)
{
if (!m_PolyOuts[i]->Pts) continue;
Path pg;
OutPt* p = m_PolyOuts[i]->Pts->Prev;
int cnt = PointCount(p);
if (cnt < 2) continue;
pg.reserve(cnt);
for (int i = 0; i < cnt; ++i)
{
pg.push_back(p->Pt);
p = p->Prev;
}
polys.push_back(pg);
}
}
//------------------------------------------------------------------------------
void Clipper::BuildResult2(PolyTree& polytree)
{
polytree.Clear();
polytree.AllNodes.reserve(m_PolyOuts.size());
//add each output polygon/contour to polytree ...
for (PolyOutList::size_type i = 0; i < m_PolyOuts.size(); i++)
{
OutRec* outRec = m_PolyOuts[i];
int cnt = PointCount(outRec->Pts);
if ((outRec->IsOpen && cnt < 2) || (!outRec->IsOpen && cnt < 3)) continue;
FixHoleLinkage(*outRec);
PolyNode* pn = new PolyNode();
//nb: polytree takes ownership of all the PolyNodes
polytree.AllNodes.push_back(pn);
outRec->PolyNd = pn;
pn->Parent = 0;
pn->Index = 0;
pn->Contour.reserve(cnt);
OutPt *op = outRec->Pts->Prev;
for (int j = 0; j < cnt; j++)
{
pn->Contour.push_back(op->Pt);
op = op->Prev;
}
}
//fixup PolyNode links etc ...
polytree.Childs.reserve(m_PolyOuts.size());
for (PolyOutList::size_type i = 0; i < m_PolyOuts.size(); i++)
{
OutRec* outRec = m_PolyOuts[i];
if (!outRec->PolyNd) continue;
if (outRec->IsOpen)
{
outRec->PolyNd->m_IsOpen = true;
polytree.AddChild(*outRec->PolyNd);
}
else if (outRec->FirstLeft && outRec->FirstLeft->PolyNd)
outRec->FirstLeft->PolyNd->AddChild(*outRec->PolyNd);
else
polytree.AddChild(*outRec->PolyNd);
}
}
//------------------------------------------------------------------------------
void SwapIntersectNodes(IntersectNode &int1, IntersectNode &int2)
{
//just swap the contents (because fIntersectNodes is a single-linked-list)
IntersectNode inode = int1; //gets a copy of Int1
int1.Edge1 = int2.Edge1;
int1.Edge2 = int2.Edge2;
int1.Pt = int2.Pt;
int2.Edge1 = inode.Edge1;
int2.Edge2 = inode.Edge2;
int2.Pt = inode.Pt;
}
//------------------------------------------------------------------------------
inline bool E2InsertsBeforeE1(TEdge &e1, TEdge &e2)
{
if (e2.Curr.X == e1.Curr.X)
{
if (e2.Top.Y > e1.Top.Y)
return e2.Top.X < TopX(e1, e2.Top.Y);
else return e1.Top.X > TopX(e2, e1.Top.Y);
}
else return e2.Curr.X < e1.Curr.X;
}
//------------------------------------------------------------------------------
bool GetOverlap(const cInt a1, const cInt a2, const cInt b1, const cInt b2,
cInt& Left, cInt& Right)
{
if (a1 < a2)
{
if (b1 < b2) {Left = std::max(a1,b1); Right = std::min(a2,b2);}
else {Left = std::max(a1,b2); Right = std::min(a2,b1);}
}
else
{
if (b1 < b2) {Left = std::max(a2,b1); Right = std::min(a1,b2);}
else {Left = std::max(a2,b2); Right = std::min(a1,b1);}
}
return Left < Right;
}
//------------------------------------------------------------------------------
inline void UpdateOutPtIdxs(OutRec& outrec)
{
OutPt* op = outrec.Pts;
do
{
op->Idx = outrec.Idx;
op = op->Prev;
}
while(op != outrec.Pts);
}
//------------------------------------------------------------------------------
void Clipper::InsertEdgeIntoAEL(TEdge *edge, TEdge* startEdge)
{
if(!m_ActiveEdges)
{
edge->PrevInAEL = 0;
edge->NextInAEL = 0;
m_ActiveEdges = edge;
}
else if(!startEdge && E2InsertsBeforeE1(*m_ActiveEdges, *edge))
{
edge->PrevInAEL = 0;
edge->NextInAEL = m_ActiveEdges;
m_ActiveEdges->PrevInAEL = edge;
m_ActiveEdges = edge;
}
else
{
if(!startEdge) startEdge = m_ActiveEdges;
while(startEdge->NextInAEL &&
!E2InsertsBeforeE1(*startEdge->NextInAEL , *edge))
startEdge = startEdge->NextInAEL;
edge->NextInAEL = startEdge->NextInAEL;
if(startEdge->NextInAEL) startEdge->NextInAEL->PrevInAEL = edge;
edge->PrevInAEL = startEdge;
startEdge->NextInAEL = edge;
}
}
//----------------------------------------------------------------------
OutPt* DupOutPt(OutPt* outPt, bool InsertAfter)
{
OutPt* result = new OutPt;
result->Pt = outPt->Pt;
result->Idx = outPt->Idx;
if (InsertAfter)
{
result->Next = outPt->Next;
result->Prev = outPt;
outPt->Next->Prev = result;
outPt->Next = result;
}
else
{
result->Prev = outPt->Prev;
result->Next = outPt;
outPt->Prev->Next = result;
outPt->Prev = result;
}
return result;
}
//------------------------------------------------------------------------------
bool JoinHorz(OutPt* op1, OutPt* op1b, OutPt* op2, OutPt* op2b,
const IntPoint Pt, bool DiscardLeft)
{
Direction Dir1 = (op1->Pt.X > op1b->Pt.X ? dRightToLeft : dLeftToRight);
Direction Dir2 = (op2->Pt.X > op2b->Pt.X ? dRightToLeft : dLeftToRight);
if (Dir1 == Dir2) return false;
//When DiscardLeft, we want Op1b to be on the Left of Op1, otherwise we
//want Op1b to be on the Right. (And likewise with Op2 and Op2b.)
//So, to facilitate this while inserting Op1b and Op2b ...
//when DiscardLeft, make sure we're AT or RIGHT of Pt before adding Op1b,
//otherwise make sure we're AT or LEFT of Pt. (Likewise with Op2b.)
if (Dir1 == dLeftToRight)
{
while (op1->Next->Pt.X <= Pt.X &&
op1->Next->Pt.X >= op1->Pt.X && op1->Next->Pt.Y == Pt.Y)
op1 = op1->Next;
if (DiscardLeft && (op1->Pt.X != Pt.X)) op1 = op1->Next;
op1b = DupOutPt(op1, !DiscardLeft);
if (op1b->Pt != Pt)
{
op1 = op1b;
op1->Pt = Pt;
op1b = DupOutPt(op1, !DiscardLeft);
}
}
else
{
while (op1->Next->Pt.X >= Pt.X &&
op1->Next->Pt.X <= op1->Pt.X && op1->Next->Pt.Y == Pt.Y)
op1 = op1->Next;
if (!DiscardLeft && (op1->Pt.X != Pt.X)) op1 = op1->Next;
op1b = DupOutPt(op1, DiscardLeft);
if (op1b->Pt != Pt)
{
op1 = op1b;
op1->Pt = Pt;
op1b = DupOutPt(op1, DiscardLeft);
}
}
if (Dir2 == dLeftToRight)
{
while (op2->Next->Pt.X <= Pt.X &&
op2->Next->Pt.X >= op2->Pt.X && op2->Next->Pt.Y == Pt.Y)
op2 = op2->Next;
if (DiscardLeft && (op2->Pt.X != Pt.X)) op2 = op2->Next;
op2b = DupOutPt(op2, !DiscardLeft);
if (op2b->Pt != Pt)
{
op2 = op2b;
op2->Pt = Pt;
op2b = DupOutPt(op2, !DiscardLeft);
};
} else
{
while (op2->Next->Pt.X >= Pt.X &&
op2->Next->Pt.X <= op2->Pt.X && op2->Next->Pt.Y == Pt.Y)
op2 = op2->Next;
if (!DiscardLeft && (op2->Pt.X != Pt.X)) op2 = op2->Next;
op2b = DupOutPt(op2, DiscardLeft);
if (op2b->Pt != Pt)
{
op2 = op2b;
op2->Pt = Pt;
op2b = DupOutPt(op2, DiscardLeft);
};
};
if ((Dir1 == dLeftToRight) == DiscardLeft)
{
op1->Prev = op2;
op2->Next = op1;
op1b->Next = op2b;
op2b->Prev = op1b;
}
else
{
op1->Next = op2;
op2->Prev = op1;
op1b->Prev = op2b;
op2b->Next = op1b;
}
return true;
}
//------------------------------------------------------------------------------
bool Clipper::JoinPoints(Join *j, OutRec* outRec1, OutRec* outRec2)
{
OutPt *op1 = j->OutPt1, *op1b;
OutPt *op2 = j->OutPt2, *op2b;
//There are 3 kinds of joins for output polygons ...
//1. Horizontal joins where Join.OutPt1 & Join.OutPt2 are vertices anywhere
//along (horizontal) collinear edges (& Join.OffPt is on the same horizontal).
//2. Non-horizontal joins where Join.OutPt1 & Join.OutPt2 are at the same
//location at the Bottom of the overlapping segment (& Join.OffPt is above).
//3. StrictSimple joins where edges touch but are not collinear and where
//Join.OutPt1, Join.OutPt2 & Join.OffPt all share the same point.
bool isHorizontal = (j->OutPt1->Pt.Y == j->OffPt.Y);
if (isHorizontal && (j->OffPt == j->OutPt1->Pt) &&
(j->OffPt == j->OutPt2->Pt))
{
//Strictly Simple join ...
if (outRec1 != outRec2) return false;
op1b = j->OutPt1->Next;
while (op1b != op1 && (op1b->Pt == j->OffPt))
op1b = op1b->Next;
bool reverse1 = (op1b->Pt.Y > j->OffPt.Y);
op2b = j->OutPt2->Next;
while (op2b != op2 && (op2b->Pt == j->OffPt))
op2b = op2b->Next;
bool reverse2 = (op2b->Pt.Y > j->OffPt.Y);
if (reverse1 == reverse2) return false;
if (reverse1)
{
op1b = DupOutPt(op1, false);
op2b = DupOutPt(op2, true);
op1->Prev = op2;
op2->Next = op1;
op1b->Next = op2b;
op2b->Prev = op1b;
j->OutPt1 = op1;
j->OutPt2 = op1b;
return true;
} else
{
op1b = DupOutPt(op1, true);
op2b = DupOutPt(op2, false);
op1->Next = op2;
op2->Prev = op1;
op1b->Prev = op2b;
op2b->Next = op1b;
j->OutPt1 = op1;
j->OutPt2 = op1b;
return true;
}
}
else if (isHorizontal)
{
//treat horizontal joins differently to non-horizontal joins since with
//them we're not yet sure where the overlapping is. OutPt1.Pt & OutPt2.Pt
//may be anywhere along the horizontal edge.
op1b = op1;
while (op1->Prev->Pt.Y == op1->Pt.Y && op1->Prev != op1b && op1->Prev != op2)
op1 = op1->Prev;
while (op1b->Next->Pt.Y == op1b->Pt.Y && op1b->Next != op1 && op1b->Next != op2)
op1b = op1b->Next;
if (op1b->Next == op1 || op1b->Next == op2) return false; //a flat 'polygon'
op2b = op2;
while (op2->Prev->Pt.Y == op2->Pt.Y && op2->Prev != op2b && op2->Prev != op1b)
op2 = op2->Prev;
while (op2b->Next->Pt.Y == op2b->Pt.Y && op2b->Next != op2 && op2b->Next != op1)
op2b = op2b->Next;
if (op2b->Next == op2 || op2b->Next == op1) return false; //a flat 'polygon'
cInt Left, Right;
//Op1 --> Op1b & Op2 --> Op2b are the extremites of the horizontal edges
if (!GetOverlap(op1->Pt.X, op1b->Pt.X, op2->Pt.X, op2b->Pt.X, Left, Right))
return false;
//DiscardLeftSide: when overlapping edges are joined, a spike will created
//which needs to be cleaned up. However, we don't want Op1 or Op2 caught up
//on the discard Side as either may still be needed for other joins ...
IntPoint Pt;
bool DiscardLeftSide;
if (op1->Pt.X >= Left && op1->Pt.X <= Right)
{
Pt = op1->Pt; DiscardLeftSide = (op1->Pt.X > op1b->Pt.X);
}
else if (op2->Pt.X >= Left&& op2->Pt.X <= Right)
{
Pt = op2->Pt; DiscardLeftSide = (op2->Pt.X > op2b->Pt.X);
}
else if (op1b->Pt.X >= Left && op1b->Pt.X <= Right)
{
Pt = op1b->Pt; DiscardLeftSide = op1b->Pt.X > op1->Pt.X;
}
else
{
Pt = op2b->Pt; DiscardLeftSide = (op2b->Pt.X > op2->Pt.X);
}
j->OutPt1 = op1; j->OutPt2 = op2;
return JoinHorz(op1, op1b, op2, op2b, Pt, DiscardLeftSide);
} else
{
//nb: For non-horizontal joins ...
// 1. Jr.OutPt1.Pt.Y == Jr.OutPt2.Pt.Y
// 2. Jr.OutPt1.Pt > Jr.OffPt.Y
//make sure the polygons are correctly oriented ...
op1b = op1->Next;
while ((op1b->Pt == op1->Pt) && (op1b != op1)) op1b = op1b->Next;
bool Reverse1 = ((op1b->Pt.Y > op1->Pt.Y) ||
!SlopesEqual(op1->Pt, op1b->Pt, j->OffPt, m_UseFullRange));
if (Reverse1)
{
op1b = op1->Prev;
while ((op1b->Pt == op1->Pt) && (op1b != op1)) op1b = op1b->Prev;
if ((op1b->Pt.Y > op1->Pt.Y) ||
!SlopesEqual(op1->Pt, op1b->Pt, j->OffPt, m_UseFullRange)) return false;
};
op2b = op2->Next;
while ((op2b->Pt == op2->Pt) && (op2b != op2))op2b = op2b->Next;
bool Reverse2 = ((op2b->Pt.Y > op2->Pt.Y) ||
!SlopesEqual(op2->Pt, op2b->Pt, j->OffPt, m_UseFullRange));
if (Reverse2)
{
op2b = op2->Prev;
while ((op2b->Pt == op2->Pt) && (op2b != op2)) op2b = op2b->Prev;
if ((op2b->Pt.Y > op2->Pt.Y) ||
!SlopesEqual(op2->Pt, op2b->Pt, j->OffPt, m_UseFullRange)) return false;
}
if ((op1b == op1) || (op2b == op2) || (op1b == op2b) ||
((outRec1 == outRec2) && (Reverse1 == Reverse2))) return false;
if (Reverse1)
{
op1b = DupOutPt(op1, false);
op2b = DupOutPt(op2, true);
op1->Prev = op2;
op2->Next = op1;
op1b->Next = op2b;
op2b->Prev = op1b;
j->OutPt1 = op1;
j->OutPt2 = op1b;
return true;
} else
{
op1b = DupOutPt(op1, true);
op2b = DupOutPt(op2, false);
op1->Next = op2;
op2->Prev = op1;
op1b->Prev = op2b;
op2b->Next = op1b;
j->OutPt1 = op1;
j->OutPt2 = op1b;
return true;
}
}
}
//----------------------------------------------------------------------
static OutRec* ParseFirstLeft(OutRec* FirstLeft)
{
while (FirstLeft && !FirstLeft->Pts)
FirstLeft = FirstLeft->FirstLeft;
return FirstLeft;
}
//------------------------------------------------------------------------------
void Clipper::FixupFirstLefts1(OutRec* OldOutRec, OutRec* NewOutRec)
{
//tests if NewOutRec contains the polygon before reassigning FirstLeft
for (PolyOutList::size_type i = 0; i < m_PolyOuts.size(); ++i)
{
OutRec* outRec = m_PolyOuts[i];
OutRec* firstLeft = ParseFirstLeft(outRec->FirstLeft);
if (outRec->Pts && firstLeft == OldOutRec)
{
if (Poly2ContainsPoly1(outRec->Pts, NewOutRec->Pts))
outRec->FirstLeft = NewOutRec;
}
}
}
//----------------------------------------------------------------------
void Clipper::FixupFirstLefts2(OutRec* InnerOutRec, OutRec* OuterOutRec)
{
//A polygon has split into two such that one is now the inner of the other.
//It's possible that these polygons now wrap around other polygons, so check
//every polygon that's also contained by OuterOutRec's FirstLeft container
//(including 0) to see if they've become inner to the new inner polygon ...
OutRec* orfl = OuterOutRec->FirstLeft;
for (PolyOutList::size_type i = 0; i < m_PolyOuts.size(); ++i)
{
OutRec* outRec = m_PolyOuts[i];
if (!outRec->Pts || outRec == OuterOutRec || outRec == InnerOutRec)
continue;
OutRec* firstLeft = ParseFirstLeft(outRec->FirstLeft);
if (firstLeft != orfl && firstLeft != InnerOutRec && firstLeft != OuterOutRec)
continue;
if (Poly2ContainsPoly1(outRec->Pts, InnerOutRec->Pts))
outRec->FirstLeft = InnerOutRec;
else if (Poly2ContainsPoly1(outRec->Pts, OuterOutRec->Pts))
outRec->FirstLeft = OuterOutRec;
else if (outRec->FirstLeft == InnerOutRec || outRec->FirstLeft == OuterOutRec)
outRec->FirstLeft = orfl;
}
}
//----------------------------------------------------------------------
void Clipper::FixupFirstLefts3(OutRec* OldOutRec, OutRec* NewOutRec)
{
//reassigns FirstLeft WITHOUT testing if NewOutRec contains the polygon
for (PolyOutList::size_type i = 0; i < m_PolyOuts.size(); ++i)
{
OutRec* outRec = m_PolyOuts[i];
OutRec* firstLeft = ParseFirstLeft(outRec->FirstLeft);
if (outRec->Pts && firstLeft == OldOutRec)
outRec->FirstLeft = NewOutRec;
}
}
//----------------------------------------------------------------------
void Clipper::JoinCommonEdges()
{
for (JoinList::size_type i = 0; i < m_Joins.size(); i++)
{
Join* join = m_Joins[i];
OutRec *outRec1 = GetOutRec(join->OutPt1->Idx);
OutRec *outRec2 = GetOutRec(join->OutPt2->Idx);
if (!outRec1->Pts || !outRec2->Pts) continue;
if (outRec1->IsOpen || outRec2->IsOpen) continue;
//get the polygon fragment with the correct hole state (FirstLeft)
//before calling JoinPoints() ...
OutRec *holeStateRec;
if (outRec1 == outRec2) holeStateRec = outRec1;
else if (OutRec1RightOfOutRec2(outRec1, outRec2)) holeStateRec = outRec2;
else if (OutRec1RightOfOutRec2(outRec2, outRec1)) holeStateRec = outRec1;
else holeStateRec = GetLowermostRec(outRec1, outRec2);
if (!JoinPoints(join, outRec1, outRec2)) continue;
if (outRec1 == outRec2)
{
//instead of joining two polygons, we've just created a new one by
//splitting one polygon into two.
outRec1->Pts = join->OutPt1;
outRec1->BottomPt = 0;
outRec2 = CreateOutRec();
outRec2->Pts = join->OutPt2;
//update all OutRec2.Pts Idx's ...
UpdateOutPtIdxs(*outRec2);
if (Poly2ContainsPoly1(outRec2->Pts, outRec1->Pts))
{
//outRec1 contains outRec2 ...
outRec2->IsHole = !outRec1->IsHole;
outRec2->FirstLeft = outRec1;
if (m_UsingPolyTree) FixupFirstLefts2(outRec2, outRec1);
if ((outRec2->IsHole ^ m_ReverseOutput) == (Area(*outRec2) > 0))
ReversePolyPtLinks(outRec2->Pts);
} else if (Poly2ContainsPoly1(outRec1->Pts, outRec2->Pts))
{
//outRec2 contains outRec1 ...
outRec2->IsHole = outRec1->IsHole;
outRec1->IsHole = !outRec2->IsHole;
outRec2->FirstLeft = outRec1->FirstLeft;
outRec1->FirstLeft = outRec2;
if (m_UsingPolyTree) FixupFirstLefts2(outRec1, outRec2);
if ((outRec1->IsHole ^ m_ReverseOutput) == (Area(*outRec1) > 0))
ReversePolyPtLinks(outRec1->Pts);
}
else
{
//the 2 polygons are completely separate ...
outRec2->IsHole = outRec1->IsHole;
outRec2->FirstLeft = outRec1->FirstLeft;
//fixup FirstLeft pointers that may need reassigning to OutRec2
if (m_UsingPolyTree) FixupFirstLefts1(outRec1, outRec2);
}
} else
{
//joined 2 polygons together ...
outRec2->Pts = 0;
outRec2->BottomPt = 0;
outRec2->Idx = outRec1->Idx;
outRec1->IsHole = holeStateRec->IsHole;
if (holeStateRec == outRec2)
outRec1->FirstLeft = outRec2->FirstLeft;
outRec2->FirstLeft = outRec1;
if (m_UsingPolyTree) FixupFirstLefts3(outRec2, outRec1);
}
}
}
//------------------------------------------------------------------------------
// ClipperOffset support functions ...
//------------------------------------------------------------------------------
DoublePoint GetUnitNormal(const IntPoint &pt1, const IntPoint &pt2)
{
if(pt2.X == pt1.X && pt2.Y == pt1.Y)
return DoublePoint(0, 0);
double Dx = (double)(pt2.X - pt1.X);
double dy = (double)(pt2.Y - pt1.Y);
double f = 1 *1.0/ std::sqrt( Dx*Dx + dy*dy );
Dx *= f;
dy *= f;
return DoublePoint(dy, -Dx);
}
//------------------------------------------------------------------------------
// ClipperOffset class
//------------------------------------------------------------------------------
ClipperOffset::ClipperOffset(double miterLimit, double arcTolerance)
{
this->MiterLimit = miterLimit;
this->ArcTolerance = arcTolerance;
m_lowest.X = -1;
}
//------------------------------------------------------------------------------
ClipperOffset::~ClipperOffset()
{
Clear();
}
//------------------------------------------------------------------------------
void ClipperOffset::Clear()
{
for (int i = 0; i < m_polyNodes.ChildCount(); ++i)
delete m_polyNodes.Childs[i];
m_polyNodes.Childs.clear();
m_lowest.X = -1;
}
//------------------------------------------------------------------------------
void ClipperOffset::AddPath(const Path& path, JoinType joinType, EndType endType)
{
int highI = (int)path.size() - 1;
if (highI < 0) return;
PolyNode* newNode = new PolyNode();
newNode->m_jointype = joinType;
newNode->m_endtype = endType;
//strip duplicate points from path and also get index to the lowest point ...
if (endType == etClosedLine || endType == etClosedPolygon)
while (highI > 0 && path[0] == path[highI]) highI--;
newNode->Contour.reserve(highI + 1);
newNode->Contour.push_back(path[0]);
int j = 0, k = 0;
for (int i = 1; i <= highI; i++)
if (newNode->Contour[j] != path[i])
{
j++;
newNode->Contour.push_back(path[i]);
if (path[i].Y > newNode->Contour[k].Y ||
(path[i].Y == newNode->Contour[k].Y &&
path[i].X < newNode->Contour[k].X)) k = j;
}
if (endType == etClosedPolygon && j < 2)
{
delete newNode;
return;
}
m_polyNodes.AddChild(*newNode);
//if this path's lowest pt is lower than all the others then update m_lowest
if (endType != etClosedPolygon) return;
if (m_lowest.X < 0)
m_lowest = IntPoint(m_polyNodes.ChildCount() - 1, k);
else
{
IntPoint ip = m_polyNodes.Childs[(int)m_lowest.X]->Contour[(int)m_lowest.Y];
if (newNode->Contour[k].Y > ip.Y ||
(newNode->Contour[k].Y == ip.Y &&
newNode->Contour[k].X < ip.X))
m_lowest = IntPoint(m_polyNodes.ChildCount() - 1, k);
}
}
//------------------------------------------------------------------------------
void ClipperOffset::AddPaths(const Paths& paths, JoinType joinType, EndType endType)
{
for (Paths::size_type i = 0; i < paths.size(); ++i)
AddPath(paths[i], joinType, endType);
}
//------------------------------------------------------------------------------
void ClipperOffset::FixOrientations()
{
//fixup orientations of all closed paths if the orientation of the
//closed path with the lowermost vertex is wrong ...
if (m_lowest.X >= 0 &&
!Orientation(m_polyNodes.Childs[(int)m_lowest.X]->Contour))
{
for (int i = 0; i < m_polyNodes.ChildCount(); ++i)
{
PolyNode& node = *m_polyNodes.Childs[i];
if (node.m_endtype == etClosedPolygon ||
(node.m_endtype == etClosedLine && Orientation(node.Contour)))
ReversePath(node.Contour);
}
} else
{
for (int i = 0; i < m_polyNodes.ChildCount(); ++i)
{
PolyNode& node = *m_polyNodes.Childs[i];
if (node.m_endtype == etClosedLine && !Orientation(node.Contour))
ReversePath(node.Contour);
}
}
}
//------------------------------------------------------------------------------
void ClipperOffset::Execute(Paths& solution, double delta)
{
solution.clear();
FixOrientations();
DoOffset(delta);
//now clean up 'corners' ...
Clipper clpr;
clpr.AddPaths(m_destPolys, ptSubject, true);
if (delta > 0)
{
clpr.Execute(ctUnion, solution, pftPositive, pftPositive);
}
else
{
IntRect r = clpr.GetBounds();
Path outer(4);
outer[0] = IntPoint(r.left - 10, r.bottom + 10);
outer[1] = IntPoint(r.right + 10, r.bottom + 10);
outer[2] = IntPoint(r.right + 10, r.top - 10);
outer[3] = IntPoint(r.left - 10, r.top - 10);
clpr.AddPath(outer, ptSubject, true);
clpr.ReverseSolution(true);
clpr.Execute(ctUnion, solution, pftNegative, pftNegative);
if (solution.size() > 0) solution.erase(solution.begin());
}
}
//------------------------------------------------------------------------------
void ClipperOffset::Execute(PolyTree& solution, double delta)
{
solution.Clear();
FixOrientations();
DoOffset(delta);
//now clean up 'corners' ...
Clipper clpr;
clpr.AddPaths(m_destPolys, ptSubject, true);
if (delta > 0)
{
clpr.Execute(ctUnion, solution, pftPositive, pftPositive);
}
else
{
IntRect r = clpr.GetBounds();
Path outer(4);
outer[0] = IntPoint(r.left - 10, r.bottom + 10);
outer[1] = IntPoint(r.right + 10, r.bottom + 10);
outer[2] = IntPoint(r.right + 10, r.top - 10);
outer[3] = IntPoint(r.left - 10, r.top - 10);
clpr.AddPath(outer, ptSubject, true);
clpr.ReverseSolution(true);
clpr.Execute(ctUnion, solution, pftNegative, pftNegative);
//remove the outer PolyNode rectangle ...
if (solution.ChildCount() == 1 && solution.Childs[0]->ChildCount() > 0)
{
PolyNode* outerNode = solution.Childs[0];
solution.Childs.reserve(outerNode->ChildCount());
solution.Childs[0] = outerNode->Childs[0];
solution.Childs[0]->Parent = outerNode->Parent;
for (int i = 1; i < outerNode->ChildCount(); ++i)
solution.AddChild(*outerNode->Childs[i]);
}
else
solution.Clear();
}
}
//------------------------------------------------------------------------------
void ClipperOffset::DoOffset(double delta)
{
m_destPolys.clear();
m_delta = delta;
//if Zero offset, just copy any CLOSED polygons to m_p and return ...
if (NEAR_ZERO(delta))
{
m_destPolys.reserve(m_polyNodes.ChildCount());
for (int i = 0; i < m_polyNodes.ChildCount(); i++)
{
PolyNode& node = *m_polyNodes.Childs[i];
if (node.m_endtype == etClosedPolygon)
m_destPolys.push_back(node.Contour);
}
return;
}
//see offset_triginometry3.svg in the documentation folder ...
if (MiterLimit > 2) m_miterLim = 2/(MiterLimit * MiterLimit);
else m_miterLim = 0.5;
double y;
if (ArcTolerance <= 0.0) y = def_arc_tolerance;
else if (ArcTolerance > std::fabs(delta) * def_arc_tolerance)
y = std::fabs(delta) * def_arc_tolerance;
else y = ArcTolerance;
//see offset_triginometry2.svg in the documentation folder ...
double steps = pi / std::acos(1 - y / std::fabs(delta));
if (steps > std::fabs(delta) * pi)
steps = std::fabs(delta) * pi; //ie excessive precision check
m_sin = std::sin(two_pi / steps);
m_cos = std::cos(two_pi / steps);
m_StepsPerRad = steps / two_pi;
if (delta < 0.0) m_sin = -m_sin;
m_destPolys.reserve(m_polyNodes.ChildCount() * 2);
for (int i = 0; i < m_polyNodes.ChildCount(); i++)
{
PolyNode& node = *m_polyNodes.Childs[i];
m_srcPoly = node.Contour;
int len = (int)m_srcPoly.size();
if (len == 0 || (delta <= 0 && (len < 3 || node.m_endtype != etClosedPolygon)))
continue;
m_destPoly.clear();
if (len == 1)
{
if (node.m_jointype == jtRound)
{
double X = 1.0, Y = 0.0;
for (cInt j = 1; j <= steps; j++)
{
m_destPoly.push_back(IntPoint(
Round(m_srcPoly[0].X + X * delta),
Round(m_srcPoly[0].Y + Y * delta)));
double X2 = X;
X = X * m_cos - m_sin * Y;
Y = X2 * m_sin + Y * m_cos;
}
}
else
{
double X = -1.0, Y = -1.0;
for (int j = 0; j < 4; ++j)
{
m_destPoly.push_back(IntPoint(
Round(m_srcPoly[0].X + X * delta),
Round(m_srcPoly[0].Y + Y * delta)));
if (X < 0) X = 1;
else if (Y < 0) Y = 1;
else X = -1;
}
}
m_destPolys.push_back(m_destPoly);
continue;
}
//build m_normals ...
m_normals.clear();
m_normals.reserve(len);
for (int j = 0; j < len - 1; ++j)
m_normals.push_back(GetUnitNormal(m_srcPoly[j], m_srcPoly[j + 1]));
if (node.m_endtype == etClosedLine || node.m_endtype == etClosedPolygon)
m_normals.push_back(GetUnitNormal(m_srcPoly[len - 1], m_srcPoly[0]));
else
m_normals.push_back(DoublePoint(m_normals[len - 2]));
if (node.m_endtype == etClosedPolygon)
{
int k = len - 1;
for (int j = 0; j < len; ++j)
OffsetPoint(j, k, node.m_jointype);
m_destPolys.push_back(m_destPoly);
}
else if (node.m_endtype == etClosedLine)
{
int k = len - 1;
for (int j = 0; j < len; ++j)
OffsetPoint(j, k, node.m_jointype);
m_destPolys.push_back(m_destPoly);
m_destPoly.clear();
//re-build m_normals ...
DoublePoint n = m_normals[len -1];
for (int j = len - 1; j > 0; j--)
m_normals[j] = DoublePoint(-m_normals[j - 1].X, -m_normals[j - 1].Y);
m_normals[0] = DoublePoint(-n.X, -n.Y);
k = 0;
for (int j = len - 1; j >= 0; j--)
OffsetPoint(j, k, node.m_jointype);
m_destPolys.push_back(m_destPoly);
}
else
{
int k = 0;
for (int j = 1; j < len - 1; ++j)
OffsetPoint(j, k, node.m_jointype);
IntPoint pt1;
if (node.m_endtype == etOpenButt)
{
int j = len - 1;
pt1 = IntPoint((cInt)Round(m_srcPoly[j].X + m_normals[j].X *
delta), (cInt)Round(m_srcPoly[j].Y + m_normals[j].Y * delta));
m_destPoly.push_back(pt1);
pt1 = IntPoint((cInt)Round(m_srcPoly[j].X - m_normals[j].X *
delta), (cInt)Round(m_srcPoly[j].Y - m_normals[j].Y * delta));
m_destPoly.push_back(pt1);
}
else
{
int j = len - 1;
k = len - 2;
m_sinA = 0;
m_normals[j] = DoublePoint(-m_normals[j].X, -m_normals[j].Y);
if (node.m_endtype == etOpenSquare)
DoSquare(j, k);
else
DoRound(j, k);
}
//re-build m_normals ...
for (int j = len - 1; j > 0; j--)
m_normals[j] = DoublePoint(-m_normals[j - 1].X, -m_normals[j - 1].Y);
m_normals[0] = DoublePoint(-m_normals[1].X, -m_normals[1].Y);
k = len - 1;
for (int j = k - 1; j > 0; --j) OffsetPoint(j, k, node.m_jointype);
if (node.m_endtype == etOpenButt)
{
pt1 = IntPoint((cInt)Round(m_srcPoly[0].X - m_normals[0].X * delta),
(cInt)Round(m_srcPoly[0].Y - m_normals[0].Y * delta));
m_destPoly.push_back(pt1);
pt1 = IntPoint((cInt)Round(m_srcPoly[0].X + m_normals[0].X * delta),
(cInt)Round(m_srcPoly[0].Y + m_normals[0].Y * delta));
m_destPoly.push_back(pt1);
}
else
{
k = 1;
m_sinA = 0;
if (node.m_endtype == etOpenSquare)
DoSquare(0, 1);
else
DoRound(0, 1);
}
m_destPolys.push_back(m_destPoly);
}
}
}
//------------------------------------------------------------------------------
void ClipperOffset::OffsetPoint(int j, int& k, JoinType jointype)
{
//cross product ...
m_sinA = (m_normals[k].X * m_normals[j].Y - m_normals[j].X * m_normals[k].Y);
if (std::fabs(m_sinA * m_delta) < 1.0)
{
//dot product ...
double cosA = (m_normals[k].X * m_normals[j].X + m_normals[j].Y * m_normals[k].Y );
if (cosA > 0) // angle => 0 degrees
{
m_destPoly.push_back(IntPoint(Round(m_srcPoly[j].X + m_normals[k].X * m_delta),
Round(m_srcPoly[j].Y + m_normals[k].Y * m_delta)));
return;
}
//else angle => 180 degrees
}
else if (m_sinA > 1.0) m_sinA = 1.0;
else if (m_sinA < -1.0) m_sinA = -1.0;
if (m_sinA * m_delta < 0)
{
m_destPoly.push_back(IntPoint(Round(m_srcPoly[j].X + m_normals[k].X * m_delta),
Round(m_srcPoly[j].Y + m_normals[k].Y * m_delta)));
m_destPoly.push_back(m_srcPoly[j]);
m_destPoly.push_back(IntPoint(Round(m_srcPoly[j].X + m_normals[j].X * m_delta),
Round(m_srcPoly[j].Y + m_normals[j].Y * m_delta)));
}
else
switch (jointype)
{
case jtMiter:
{
double r = 1 + (m_normals[j].X * m_normals[k].X +
m_normals[j].Y * m_normals[k].Y);
if (r >= m_miterLim) DoMiter(j, k, r); else DoSquare(j, k);
break;
}
case jtSquare: DoSquare(j, k); break;
case jtRound: DoRound(j, k); break;
}
k = j;
}
//------------------------------------------------------------------------------
void ClipperOffset::DoSquare(int j, int k)
{
double dx = std::tan(std::atan2(m_sinA,
m_normals[k].X * m_normals[j].X + m_normals[k].Y * m_normals[j].Y) / 4);
m_destPoly.push_back(IntPoint(
Round(m_srcPoly[j].X + m_delta * (m_normals[k].X - m_normals[k].Y * dx)),
Round(m_srcPoly[j].Y + m_delta * (m_normals[k].Y + m_normals[k].X * dx))));
m_destPoly.push_back(IntPoint(
Round(m_srcPoly[j].X + m_delta * (m_normals[j].X + m_normals[j].Y * dx)),
Round(m_srcPoly[j].Y + m_delta * (m_normals[j].Y - m_normals[j].X * dx))));
}
//------------------------------------------------------------------------------
void ClipperOffset::DoMiter(int j, int k, double r)
{
double q = m_delta / r;
m_destPoly.push_back(IntPoint(Round(m_srcPoly[j].X + (m_normals[k].X + m_normals[j].X) * q),
Round(m_srcPoly[j].Y + (m_normals[k].Y + m_normals[j].Y) * q)));
}
//------------------------------------------------------------------------------
void ClipperOffset::DoRound(int j, int k)
{
double a = std::atan2(m_sinA,
m_normals[k].X * m_normals[j].X + m_normals[k].Y * m_normals[j].Y);
int steps = std::max((int)Round(m_StepsPerRad * std::fabs(a)), 1);
double X = m_normals[k].X, Y = m_normals[k].Y, X2;
for (int i = 0; i < steps; ++i)
{
m_destPoly.push_back(IntPoint(
Round(m_srcPoly[j].X + X * m_delta),
Round(m_srcPoly[j].Y + Y * m_delta)));
X2 = X;
X = X * m_cos - m_sin * Y;
Y = X2 * m_sin + Y * m_cos;
}
m_destPoly.push_back(IntPoint(
Round(m_srcPoly[j].X + m_normals[j].X * m_delta),
Round(m_srcPoly[j].Y + m_normals[j].Y * m_delta)));
}
//------------------------------------------------------------------------------
// Miscellaneous public functions
//------------------------------------------------------------------------------
void Clipper::DoSimplePolygons()
{
PolyOutList::size_type i = 0;
while (i < m_PolyOuts.size())
{
OutRec* outrec = m_PolyOuts[i++];
OutPt* op = outrec->Pts;
if (!op || outrec->IsOpen) continue;
do //for each Pt in Polygon until duplicate found do ...
{
OutPt* op2 = op->Next;
while (op2 != outrec->Pts)
{
if ((op->Pt == op2->Pt) && op2->Next != op && op2->Prev != op)
{
//split the polygon into two ...
OutPt* op3 = op->Prev;
OutPt* op4 = op2->Prev;
op->Prev = op4;
op4->Next = op;
op2->Prev = op3;
op3->Next = op2;
outrec->Pts = op;
OutRec* outrec2 = CreateOutRec();
outrec2->Pts = op2;
UpdateOutPtIdxs(*outrec2);
if (Poly2ContainsPoly1(outrec2->Pts, outrec->Pts))
{
//OutRec2 is contained by OutRec1 ...
outrec2->IsHole = !outrec->IsHole;
outrec2->FirstLeft = outrec;
if (m_UsingPolyTree) FixupFirstLefts2(outrec2, outrec);
}
else
if (Poly2ContainsPoly1(outrec->Pts, outrec2->Pts))
{
//OutRec1 is contained by OutRec2 ...
outrec2->IsHole = outrec->IsHole;
outrec->IsHole = !outrec2->IsHole;
outrec2->FirstLeft = outrec->FirstLeft;
outrec->FirstLeft = outrec2;
if (m_UsingPolyTree) FixupFirstLefts2(outrec, outrec2);
}
else
{
//the 2 polygons are separate ...
outrec2->IsHole = outrec->IsHole;
outrec2->FirstLeft = outrec->FirstLeft;
if (m_UsingPolyTree) FixupFirstLefts1(outrec, outrec2);
}
op2 = op; //ie get ready for the Next iteration
}
op2 = op2->Next;
}
op = op->Next;
}
while (op != outrec->Pts);
}
}
//------------------------------------------------------------------------------
void ReversePath(Path& p)
{
std::reverse(p.begin(), p.end());
}
//------------------------------------------------------------------------------
void ReversePaths(Paths& p)
{
for (Paths::size_type i = 0; i < p.size(); ++i)
ReversePath(p[i]);
}
//------------------------------------------------------------------------------
void SimplifyPolygon(const Path &in_poly, Paths &out_polys, PolyFillType fillType)
{
Clipper c;
c.StrictlySimple(true);
c.AddPath(in_poly, ptSubject, true);
c.Execute(ctUnion, out_polys, fillType, fillType);
}
//------------------------------------------------------------------------------
void SimplifyPolygons(const Paths &in_polys, Paths &out_polys, PolyFillType fillType)
{
Clipper c;
c.StrictlySimple(true);
c.AddPaths(in_polys, ptSubject, true);
c.Execute(ctUnion, out_polys, fillType, fillType);
}
//------------------------------------------------------------------------------
void SimplifyPolygons(Paths &polys, PolyFillType fillType)
{
SimplifyPolygons(polys, polys, fillType);
}
//------------------------------------------------------------------------------
inline double DistanceSqrd(const IntPoint& pt1, const IntPoint& pt2)
{
double Dx = ((double)pt1.X - pt2.X);
double dy = ((double)pt1.Y - pt2.Y);
return (Dx*Dx + dy*dy);
}
//------------------------------------------------------------------------------
double DistanceFromLineSqrd(
const IntPoint& pt, const IntPoint& ln1, const IntPoint& ln2)
{
//The equation of a line in general form (Ax + By + C = 0)
//given 2 points (x�,y�) & (x�,y�) is ...
//(y� - y�)x + (x� - x�)y + (y� - y�)x� - (x� - x�)y� = 0
//A = (y� - y�); B = (x� - x�); C = (y� - y�)x� - (x� - x�)y�
//perpendicular distance of point (x�,y�) = (Ax� + By� + C)/Sqrt(A� + B�)
//see http://en.wikipedia.org/wiki/Perpendicular_distance
double A = double(ln1.Y - ln2.Y);
double B = double(ln2.X - ln1.X);
double C = A * ln1.X + B * ln1.Y;
C = A * pt.X + B * pt.Y - C;
return (C * C) / (A * A + B * B);
}
//---------------------------------------------------------------------------
bool SlopesNearCollinear(const IntPoint& pt1,
const IntPoint& pt2, const IntPoint& pt3, double distSqrd)
{
//this function is more accurate when the point that's geometrically
//between the other 2 points is the one that's tested for distance.
//ie makes it more likely to pick up 'spikes' ...
if (Abs(pt1.X - pt2.X) > Abs(pt1.Y - pt2.Y))
{
if ((pt1.X > pt2.X) == (pt1.X < pt3.X))
return DistanceFromLineSqrd(pt1, pt2, pt3) < distSqrd;
else if ((pt2.X > pt1.X) == (pt2.X < pt3.X))
return DistanceFromLineSqrd(pt2, pt1, pt3) < distSqrd;
else
return DistanceFromLineSqrd(pt3, pt1, pt2) < distSqrd;
}
else
{
if ((pt1.Y > pt2.Y) == (pt1.Y < pt3.Y))
return DistanceFromLineSqrd(pt1, pt2, pt3) < distSqrd;
else if ((pt2.Y > pt1.Y) == (pt2.Y < pt3.Y))
return DistanceFromLineSqrd(pt2, pt1, pt3) < distSqrd;
else
return DistanceFromLineSqrd(pt3, pt1, pt2) < distSqrd;
}
}
//------------------------------------------------------------------------------
bool PointsAreClose(IntPoint pt1, IntPoint pt2, double distSqrd)
{
double Dx = (double)pt1.X - pt2.X;
double dy = (double)pt1.Y - pt2.Y;
return ((Dx * Dx) + (dy * dy) <= distSqrd);
}
//------------------------------------------------------------------------------
OutPt* ExcludeOp(OutPt* op)
{
OutPt* result = op->Prev;
result->Next = op->Next;
op->Next->Prev = result;
result->Idx = 0;
return result;
}
//------------------------------------------------------------------------------
void CleanPolygon(const Path& in_poly, Path& out_poly, double distance)
{
//distance = proximity in units/pixels below which vertices
//will be stripped. Default ~= sqrt(2).
size_t size = in_poly.size();
if (size == 0)
{
out_poly.clear();
return;
}
OutPt* outPts = new OutPt[size];
for (size_t i = 0; i < size; ++i)
{
outPts[i].Pt = in_poly[i];
outPts[i].Next = &outPts[(i + 1) % size];
outPts[i].Next->Prev = &outPts[i];
outPts[i].Idx = 0;
}
double distSqrd = distance * distance;
OutPt* op = &outPts[0];
while (op->Idx == 0 && op->Next != op->Prev)
{
if (PointsAreClose(op->Pt, op->Prev->Pt, distSqrd))
{
op = ExcludeOp(op);
size--;
}
else if (PointsAreClose(op->Prev->Pt, op->Next->Pt, distSqrd))
{
ExcludeOp(op->Next);
op = ExcludeOp(op);
size -= 2;
}
else if (SlopesNearCollinear(op->Prev->Pt, op->Pt, op->Next->Pt, distSqrd))
{
op = ExcludeOp(op);
size--;
}
else
{
op->Idx = 1;
op = op->Next;
}
}
if (size < 3) size = 0;
out_poly.resize(size);
for (size_t i = 0; i < size; ++i)
{
out_poly[i] = op->Pt;
op = op->Next;
}
delete [] outPts;
}
//------------------------------------------------------------------------------
void CleanPolygon(Path& poly, double distance)
{
CleanPolygon(poly, poly, distance);
}
//------------------------------------------------------------------------------
void CleanPolygons(const Paths& in_polys, Paths& out_polys, double distance)
{
out_polys.resize(in_polys.size());
for (Paths::size_type i = 0; i < in_polys.size(); ++i)
CleanPolygon(in_polys[i], out_polys[i], distance);
}
//------------------------------------------------------------------------------
void CleanPolygons(Paths& polys, double distance)
{
CleanPolygons(polys, polys, distance);
}
//------------------------------------------------------------------------------
void Minkowski(const Path& poly, const Path& path,
Paths& solution, bool isSum, bool isClosed)
{
int delta = (isClosed ? 1 : 0);
size_t polyCnt = poly.size();
size_t pathCnt = path.size();
Paths pp;
pp.reserve(pathCnt);
if (isSum)
for (size_t i = 0; i < pathCnt; ++i)
{
Path p;
p.reserve(polyCnt);
for (size_t j = 0; j < poly.size(); ++j)
p.push_back(IntPoint(path[i].X + poly[j].X, path[i].Y + poly[j].Y));
pp.push_back(p);
}
else
for (size_t i = 0; i < pathCnt; ++i)
{
Path p;
p.reserve(polyCnt);
for (size_t j = 0; j < poly.size(); ++j)
p.push_back(IntPoint(path[i].X - poly[j].X, path[i].Y - poly[j].Y));
pp.push_back(p);
}
solution.clear();
solution.reserve((pathCnt + delta) * (polyCnt + 1));
for (size_t i = 0; i < pathCnt - 1 + delta; ++i)
for (size_t j = 0; j < polyCnt; ++j)
{
Path quad;
quad.reserve(4);
quad.push_back(pp[i % pathCnt][j % polyCnt]);
quad.push_back(pp[(i + 1) % pathCnt][j % polyCnt]);
quad.push_back(pp[(i + 1) % pathCnt][(j + 1) % polyCnt]);
quad.push_back(pp[i % pathCnt][(j + 1) % polyCnt]);
if (!Orientation(quad)) ReversePath(quad);
solution.push_back(quad);
}
}
//------------------------------------------------------------------------------
void MinkowskiSum(const Path& pattern, const Path& path, Paths& solution, bool pathIsClosed)
{
Minkowski(pattern, path, solution, true, pathIsClosed);
Clipper c;
c.AddPaths(solution, ptSubject, true);
c.Execute(ctUnion, solution, pftNonZero, pftNonZero);
}
//------------------------------------------------------------------------------
void TranslatePath(const Path& input, Path& output, const IntPoint delta)
{
//precondition: input != output
output.resize(input.size());
for (size_t i = 0; i < input.size(); ++i)
output[i] = IntPoint(input[i].X + delta.X, input[i].Y + delta.Y);
}
//------------------------------------------------------------------------------
void MinkowskiSum(const Path& pattern, const Paths& paths, Paths& solution, bool pathIsClosed)
{
Clipper c;
for (size_t i = 0; i < paths.size(); ++i)
{
Paths tmp;
Minkowski(pattern, paths[i], tmp, true, pathIsClosed);
c.AddPaths(tmp, ptSubject, true);
if (pathIsClosed)
{
Path tmp2;
TranslatePath(paths[i], tmp2, pattern[0]);
c.AddPath(tmp2, ptClip, true);
}
}
c.Execute(ctUnion, solution, pftNonZero, pftNonZero);
}
//------------------------------------------------------------------------------
void MinkowskiDiff(const Path& poly1, const Path& poly2, Paths& solution)
{
Minkowski(poly1, poly2, solution, false, true);
Clipper c;
c.AddPaths(solution, ptSubject, true);
c.Execute(ctUnion, solution, pftNonZero, pftNonZero);
}
//------------------------------------------------------------------------------
enum NodeType {ntAny, ntOpen, ntClosed};
void AddPolyNodeToPaths(const PolyNode& polynode, NodeType nodetype, Paths& paths)
{
bool match = true;
if (nodetype == ntClosed) match = !polynode.IsOpen();
else if (nodetype == ntOpen) return;
if (!polynode.Contour.empty() && match)
paths.push_back(polynode.Contour);
for (int i = 0; i < polynode.ChildCount(); ++i)
AddPolyNodeToPaths(*polynode.Childs[i], nodetype, paths);
}
//------------------------------------------------------------------------------
void PolyTreeToPaths(const PolyTree& polytree, Paths& paths)
{
paths.resize(0);
paths.reserve(polytree.Total());
AddPolyNodeToPaths(polytree, ntAny, paths);
}
//------------------------------------------------------------------------------
void ClosedPathsFromPolyTree(const PolyTree& polytree, Paths& paths)
{
paths.resize(0);
paths.reserve(polytree.Total());
AddPolyNodeToPaths(polytree, ntClosed, paths);
}
//------------------------------------------------------------------------------
void OpenPathsFromPolyTree(PolyTree& polytree, Paths& paths)
{
paths.resize(0);
paths.reserve(polytree.Total());
//Open paths are top level only, so ...
for (int i = 0; i < polytree.ChildCount(); ++i)
if (polytree.Childs[i]->IsOpen())
paths.push_back(polytree.Childs[i]->Contour);
}
//------------------------------------------------------------------------------
std::ostream& operator <<(std::ostream &s, const IntPoint &p)
{
s << "(" << p.X << "," << p.Y << ")";
return s;
}
//------------------------------------------------------------------------------
std::ostream& operator <<(std::ostream &s, const Path &p)
{
if (p.empty()) return s;
Path::size_type last = p.size() -1;
for (Path::size_type i = 0; i < last; i++)
s << "(" << p[i].X << "," << p[i].Y << "), ";
s << "(" << p[last].X << "," << p[last].Y << ")\n";
return s;
}
//------------------------------------------------------------------------------
std::ostream& operator <<(std::ostream &s, const Paths &p)
{
for (Paths::size_type i = 0; i < p.size(); i++)
s << p[i];
s << "\n";
return s;
}
//------------------------------------------------------------------------------
} //ClipperLib namespace
deploy/lite/utils/clipper.hpp 已删除 100755 → 0
浏览文件 @ 053db15c
/*******************************************************************************
* *
* Author : Angus Johnson *
* Version : 6.4.2 *
* Date : 27 February 2017 *
* Website : http://www.angusj.com *
* Copyright : Angus Johnson 2010-2017 *
* *
* License: *
* Use, modification & distribution is subject to Boost Software License Ver 1. *
* http://www.boost.org/LICENSE_1_0.txt *
* *
* Attributions: *
* The code in this library is an extension of Bala Vatti's clipping algorithm: *
* "A generic solution to polygon clipping" *
* Communications of the ACM, Vol 35, Issue 7 (July 1992) pp 56-63. *
* http://portal.acm.org/citation.cfm?id=129906 *
* *
* Computer graphics and geometric modeling: implementation and algorithms *
* By Max K. Agoston *
* Springer; 1 edition (January 4, 2005) *
* http://books.google.com/books?q=vatti+clipping+agoston *
* *
* See also: *
* "Polygon Offsetting by Computing Winding Numbers" *
* Paper no. DETC2005-85513 pp. 565-575 *
* ASME 2005 International Design Engineering Technical Conferences *
* and Computers and Information in Engineering Conference (IDETC/CIE2005) *
* September 24-28, 2005 , Long Beach, California, USA *
* http://www.me.berkeley.edu/~mcmains/pubs/DAC05OffsetPolygon.pdf *
* *
*******************************************************************************/
#ifndef clipper_hpp
#define clipper_hpp
#define CLIPPER_VERSION "6.4.2"
//use_int32: When enabled 32bit ints are used instead of 64bit ints. This
//improve performance but coordinate values are limited to the range +/- 46340
//#define use_int32
//use_xyz: adds a Z member to IntPoint. Adds a minor cost to perfomance.
//#define use_xyz
//use_lines: Enables line clipping. Adds a very minor cost to performance.
#define use_lines
//use_deprecated: Enables temporary support for the obsolete functions
//#define use_deprecated
#include <vector>
#include <list>
#include <set>
#include <stdexcept>
#include <cstring>
#include <cstdlib>
#include <ostream>
#include <functional>
#include <queue>
namespace ClipperLib {
enum ClipType { ctIntersection, ctUnion, ctDifference, ctXor };
enum PolyType { ptSubject, ptClip };
//By far the most widely used winding rules for polygon filling are
//EvenOdd & NonZero (GDI, GDI+, XLib, OpenGL, Cairo, AGG, Quartz, SVG, Gr32)
//Others rules include Positive, Negative and ABS_GTR_EQ_TWO (only in OpenGL)
//see http://glprogramming.com/red/chapter11.html
enum PolyFillType { pftEvenOdd, pftNonZero, pftPositive, pftNegative };
#ifdef use_int32
typedef int cInt;
static cInt const loRange = 0x7FFF;
static cInt const hiRange = 0x7FFF;
#else
typedef signed long long cInt;
static cInt const loRange = 0x3FFFFFFF;
static cInt const hiRange = 0x3FFFFFFFFFFFFFFFLL;
typedef signed long long long64; //used by Int128 class
typedef unsigned long long ulong64;
#endif
struct IntPoint {
cInt X;
cInt Y;
#ifdef use_xyz
cInt Z;
IntPoint(cInt x = 0, cInt y = 0, cInt z = 0): X(x), Y(y), Z(z) {};
#else
IntPoint(cInt x = 0, cInt y = 0): X(x), Y(y) {};
#endif
friend inline bool operator== (const IntPoint& a, const IntPoint& b)
{
return a.X == b.X && a.Y == b.Y;
}
friend inline bool operator!= (const IntPoint& a, const IntPoint& b)
{
return a.X != b.X || a.Y != b.Y;
}
};
//------------------------------------------------------------------------------
typedef std::vector< IntPoint > Path;
typedef std::vector< Path > Paths;
inline Path& operator <<(Path& poly, const IntPoint& p) {poly.push_back(p); return poly;}
inline Paths& operator <<(Paths& polys, const Path& p) {polys.push_back(p); return polys;}
std::ostream& operator <<(std::ostream &s, const IntPoint &p);
std::ostream& operator <<(std::ostream &s, const Path &p);
std::ostream& operator <<(std::ostream &s, const Paths &p);
struct DoublePoint
{
double X;
double Y;
DoublePoint(double x = 0, double y = 0) : X(x), Y(y) {}
DoublePoint(IntPoint ip) : X((double)ip.X), Y((double)ip.Y) {}
};
//------------------------------------------------------------------------------
#ifdef use_xyz
typedef void (*ZFillCallback)(IntPoint& e1bot, IntPoint& e1top, IntPoint& e2bot, IntPoint& e2top, IntPoint& pt);
#endif
enum InitOptions {ioReverseSolution = 1, ioStrictlySimple = 2, ioPreserveCollinear = 4};
enum JoinType {jtSquare, jtRound, jtMiter};
enum EndType {etClosedPolygon, etClosedLine, etOpenButt, etOpenSquare, etOpenRound};
class PolyNode;
typedef std::vector< PolyNode* > PolyNodes;
class PolyNode
{
public:
PolyNode();
virtual ~PolyNode(){};
Path Contour;
PolyNodes Childs;
PolyNode* Parent;
PolyNode* GetNext() const;
bool IsHole() const;
bool IsOpen() const;
int ChildCount() const;
private:
//PolyNode& operator =(PolyNode& other);
unsigned Index; //node index in Parent.Childs
bool m_IsOpen;
JoinType m_jointype;
EndType m_endtype;
PolyNode* GetNextSiblingUp() const;
void AddChild(PolyNode& child);
friend class Clipper; //to access Index
friend class ClipperOffset;
};
class PolyTree: public PolyNode
{
public:
~PolyTree(){ Clear(); };
PolyNode* GetFirst() const;
void Clear();
int Total() const;
private:
//PolyTree& operator =(PolyTree& other);
PolyNodes AllNodes;
friend class Clipper; //to access AllNodes
};
bool Orientation(const Path &poly);
double Area(const Path &poly);
int PointInPolygon(const IntPoint &pt, const Path &path);
void SimplifyPolygon(const Path &in_poly, Paths &out_polys, PolyFillType fillType = pftEvenOdd);
void SimplifyPolygons(const Paths &in_polys, Paths &out_polys, PolyFillType fillType = pftEvenOdd);
void SimplifyPolygons(Paths &polys, PolyFillType fillType = pftEvenOdd);
void CleanPolygon(const Path& in_poly, Path& out_poly, double distance = 1.415);
void CleanPolygon(Path& poly, double distance = 1.415);
void CleanPolygons(const Paths& in_polys, Paths& out_polys, double distance = 1.415);
void CleanPolygons(Paths& polys, double distance = 1.415);
void MinkowskiSum(const Path& pattern, const Path& path, Paths& solution, bool pathIsClosed);
void MinkowskiSum(const Path& pattern, const Paths& paths, Paths& solution, bool pathIsClosed);
void MinkowskiDiff(const Path& poly1, const Path& poly2, Paths& solution);
void PolyTreeToPaths(const PolyTree& polytree, Paths& paths);
void ClosedPathsFromPolyTree(const PolyTree& polytree, Paths& paths);
void OpenPathsFromPolyTree(PolyTree& polytree, Paths& paths);
void ReversePath(Path& p);
void ReversePaths(Paths& p);
struct IntRect { cInt left; cInt top; cInt right; cInt bottom; };
//enums that are used internally ...
enum EdgeSide { esLeft = 1, esRight = 2};
//forward declarations (for stuff used internally) ...
struct TEdge;
struct IntersectNode;
struct LocalMinimum;
struct OutPt;
struct OutRec;
struct Join;
typedef std::vector < OutRec* > PolyOutList;
typedef std::vector < TEdge* > EdgeList;
typedef std::vector < Join* > JoinList;
typedef std::vector < IntersectNode* > IntersectList;
//------------------------------------------------------------------------------
//ClipperBase is the ancestor to the Clipper class. It should not be
//instantiated directly. This class simply abstracts the conversion of sets of
//polygon coordinates into edge objects that are stored in a LocalMinima list.
class ClipperBase
{
public:
ClipperBase();
virtual ~ClipperBase();
virtual bool AddPath(const Path &pg, PolyType PolyTyp, bool Closed);
bool AddPaths(const Paths &ppg, PolyType PolyTyp, bool Closed);
virtual void Clear();
IntRect GetBounds();
bool PreserveCollinear() {return m_PreserveCollinear;};
void PreserveCollinear(bool value) {m_PreserveCollinear = value;};
protected:
void DisposeLocalMinimaList();
TEdge* AddBoundsToLML(TEdge *e, bool IsClosed);
virtual void Reset();
TEdge* ProcessBound(TEdge* E, bool IsClockwise);
void InsertScanbeam(const cInt Y);
bool PopScanbeam(cInt &Y);
bool LocalMinimaPending();
bool PopLocalMinima(cInt Y, const LocalMinimum *&locMin);
OutRec* CreateOutRec();
void DisposeAllOutRecs();
void DisposeOutRec(PolyOutList::size_type index);
void SwapPositionsInAEL(TEdge *edge1, TEdge *edge2);
void DeleteFromAEL(TEdge *e);
void UpdateEdgeIntoAEL(TEdge *&e);
typedef std::vector<LocalMinimum> MinimaList;
MinimaList::iterator m_CurrentLM;
MinimaList m_MinimaList;
bool m_UseFullRange;
EdgeList m_edges;
bool m_PreserveCollinear;
bool m_HasOpenPaths;
PolyOutList m_PolyOuts;
TEdge *m_ActiveEdges;
typedef std::priority_queue<cInt> ScanbeamList;
ScanbeamList m_Scanbeam;
};
//------------------------------------------------------------------------------
class Clipper : public virtual ClipperBase
{
public:
Clipper(int initOptions = 0);
bool Execute(ClipType clipType,
Paths &solution,
PolyFillType fillType = pftEvenOdd);
bool Execute(ClipType clipType,
Paths &solution,
PolyFillType subjFillType,
PolyFillType clipFillType);
bool Execute(ClipType clipType,
PolyTree &polytree,
PolyFillType fillType = pftEvenOdd);
bool Execute(ClipType clipType,
PolyTree &polytree,
PolyFillType subjFillType,
PolyFillType clipFillType);
bool ReverseSolution() { return m_ReverseOutput; };
void ReverseSolution(bool value) {m_ReverseOutput = value;};
bool StrictlySimple() {return m_StrictSimple;};
void StrictlySimple(bool value) {m_StrictSimple = value;};
//set the callback function for z value filling on intersections (otherwise Z is 0)
#ifdef use_xyz
void ZFillFunction(ZFillCallback zFillFunc);
#endif
protected:
virtual bool ExecuteInternal();
private:
JoinList m_Joins;
JoinList m_GhostJoins;
IntersectList m_IntersectList;
ClipType m_ClipType;
typedef std::list<cInt> MaximaList;
MaximaList m_Maxima;
TEdge *m_SortedEdges;
bool m_ExecuteLocked;
PolyFillType m_ClipFillType;
PolyFillType m_SubjFillType;
bool m_ReverseOutput;
bool m_UsingPolyTree;
bool m_StrictSimple;
#ifdef use_xyz
ZFillCallback m_ZFill; //custom callback
#endif
void SetWindingCount(TEdge& edge);
bool IsEvenOddFillType(const TEdge& edge) const;
bool IsEvenOddAltFillType(const TEdge& edge) const;
void InsertLocalMinimaIntoAEL(const cInt botY);
void InsertEdgeIntoAEL(TEdge *edge, TEdge* startEdge);
void AddEdgeToSEL(TEdge *edge);
bool PopEdgeFromSEL(TEdge *&edge);
void CopyAELToSEL();
void DeleteFromSEL(TEdge *e);
void SwapPositionsInSEL(TEdge *edge1, TEdge *edge2);
bool IsContributing(const TEdge& edge) const;
bool IsTopHorz(const cInt XPos);
void DoMaxima(TEdge *e);
void ProcessHorizontals();
void ProcessHorizontal(TEdge *horzEdge);
void AddLocalMaxPoly(TEdge *e1, TEdge *e2, const IntPoint &pt);
OutPt* AddLocalMinPoly(TEdge *e1, TEdge *e2, const IntPoint &pt);
OutRec* GetOutRec(int idx);
void AppendPolygon(TEdge *e1, TEdge *e2);
void IntersectEdges(TEdge *e1, TEdge *e2, IntPoint &pt);
OutPt* AddOutPt(TEdge *e, const IntPoint &pt);
OutPt* GetLastOutPt(TEdge *e);
bool ProcessIntersections(const cInt topY);
void BuildIntersectList(const cInt topY);
void ProcessIntersectList();
void ProcessEdgesAtTopOfScanbeam(const cInt topY);
void BuildResult(Paths& polys);
void BuildResult2(PolyTree& polytree);
void SetHoleState(TEdge *e, OutRec *outrec);
void DisposeIntersectNodes();
bool FixupIntersectionOrder();
void FixupOutPolygon(OutRec &outrec);
void FixupOutPolyline(OutRec &outrec);
bool IsHole(TEdge *e);
bool FindOwnerFromSplitRecs(OutRec &outRec, OutRec *&currOrfl);
void FixHoleLinkage(OutRec &outrec);
void AddJoin(OutPt *op1, OutPt *op2, const IntPoint offPt);
void ClearJoins();
void ClearGhostJoins();
void AddGhostJoin(OutPt *op, const IntPoint offPt);
bool JoinPoints(Join *j, OutRec* outRec1, OutRec* outRec2);
void JoinCommonEdges();
void DoSimplePolygons();
void FixupFirstLefts1(OutRec* OldOutRec, OutRec* NewOutRec);
void FixupFirstLefts2(OutRec* InnerOutRec, OutRec* OuterOutRec);
void FixupFirstLefts3(OutRec* OldOutRec, OutRec* NewOutRec);
#ifdef use_xyz
void SetZ(IntPoint& pt, TEdge& e1, TEdge& e2);
#endif
};
//------------------------------------------------------------------------------
class ClipperOffset
{
public:
ClipperOffset(double miterLimit = 2.0, double roundPrecision = 0.25);
~ClipperOffset();
void AddPath(const Path& path, JoinType joinType, EndType endType);
void AddPaths(const Paths& paths, JoinType joinType, EndType endType);
void Execute(Paths& solution, double delta);
void Execute(PolyTree& solution, double delta);
void Clear();
double MiterLimit;
double ArcTolerance;
private:
Paths m_destPolys;
Path m_srcPoly;
Path m_destPoly;
std::vector<DoublePoint> m_normals;
double m_delta, m_sinA, m_sin, m_cos;
double m_miterLim, m_StepsPerRad;
IntPoint m_lowest;
PolyNode m_polyNodes;
void FixOrientations();
void DoOffset(double delta);
void OffsetPoint(int j, int& k, JoinType jointype);
void DoSquare(int j, int k);
void DoMiter(int j, int k, double r);
void DoRound(int j, int k);
};
//------------------------------------------------------------------------------
class clipperException : public std::exception
{
public:
clipperException(const char* description): m_descr(description) {}
virtual ~clipperException() throw() {}
virtual const char* what() const throw() {return m_descr.c_str();}
private:
std::string m_descr;
};
//------------------------------------------------------------------------------
} //ClipperLib namespace
#endif //clipper_hpp
deploy/lite/utils/db_post_process.cpp 已删除 100644 → 0
浏览文件 @ 053db15c
// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <iostream>
#include <vector>
#include <math.h>
#include "opencv2/core.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/imgproc.hpp"
#include "clipper.hpp"
#include "clipper.cpp"
void getcontourarea(float ** box, float unclip_ratio, float & distance){
int pts_num=4;
float area = 0.0f;
float dist = 0.0f;
for (int i=0; i<pts_num; i++){
area += box[i][0] * box[(i+1)%pts_num][1] - box[i][1] * box[(i + 1) % pts_num][0];
dist += sqrtf( (box[i][0] - box[(i + 1) % pts_num][0]) * (box[i][0] - box[(i + 1) % pts_num][0]) + (box[i][1] - box[(i + 1) % pts_num][1]) * (box[i][1] - box[(i + 1) % pts_num][1]) );
}
area = fabs(float(area/2.0));
distance = area * unclip_ratio / dist;
}
cv::RotatedRect unclip(float ** box){
float unclip_ratio = 2.0;
float distance = 1.0;
getcontourarea(box, unclip_ratio, distance);
ClipperLib::ClipperOffset offset;
ClipperLib::Path p;
p << ClipperLib::IntPoint(int(box[0][0]), int(box[0][1])) << ClipperLib::IntPoint(int(box[1][0]), int(box[1][1])) <<
ClipperLib::IntPoint(int(box[2][0]), int(box[2][1])) << ClipperLib::IntPoint(int(box[3][0]), int(box[3][1]));
offset.AddPath(p, ClipperLib::jtRound, ClipperLib::etClosedPolygon);
ClipperLib::Paths soln;
offset.Execute(soln, distance);
std::vector<cv::Point2f> points;
for (int j=0; j<soln.size(); j++){
for (int i=0; i< soln[soln.size()-1].size(); i++){
points.emplace_back(soln[j][i].X, soln[j][i].Y);
}
}
cv::RotatedRect res = cv::minAreaRect(points);
return res;
}
float ** Mat2Vec(cv::Mat mat)
{
auto **array = new float*[mat.rows];
for (int i = 0; i<mat.rows; ++i)
array[i] = new float[mat.cols];
for (int i = 0; i < mat.rows; ++i)
{
for (int j = 0; j < mat.cols; ++j)
{
array[i][j] = mat.at<float>(i, j);
}
}
return array;
}
void quickSort(float ** s, int l, int r)
{
if (l < r)
{
int i = l, j = r;
float x = s[l][0];
float * xp = s[l];
while (i < j)
{
while(i < j && s[j][0]>= x)
j--;
if(i < j)
std::swap(s[i++], s[j]);
while(i < j && s[i][0]< x)
i++;
if(i < j)
std::swap(s[j--], s[i]);
}
s[i] = xp;
quickSort(s, l, i - 1);
quickSort(s, i + 1, r);
}
}
void quickSort_vector(std::vector<std::vector<int>> & box, int l, int r, int axis){
if (l < r){
int i = l, j = r;
int x = box[l][axis];
std::vector<int> xp (box[l]);
while (i < j)
{
while(i < j && box[j][axis]>= x)
j--;
if(i < j)
std::swap(box[i++], box[j]);
while(i < j && box[i][axis]< x)
i++;
if(i < j)
std::swap(box[j--], box[i]);
}
box[i] = xp;
quickSort_vector(box, l, i - 1, axis);
quickSort_vector(box, i + 1, r, axis);
}
}
std::vector<std::vector<int>> order_points_clockwise(std::vector<std::vector<int>> pts){
std::vector<std::vector<int>> box = pts;
quickSort_vector(box, 0, int(box.size()-1), 0);
std::vector<std::vector<int>> leftmost = {box[0], box[1]};
std::vector<std::vector<int>> rightmost = {box[2], box[3]};
if (leftmost[0][1]>leftmost[1][1])
std::swap(leftmost[0], leftmost[1]);
if (rightmost[0][1]> rightmost[1][1])
std::swap(rightmost[0], rightmost[1]);
std::vector<std::vector<int>> rect = {leftmost[0], rightmost[0], rightmost[1], leftmost[1]};
return rect;
}
float ** get_mini_boxes(cv::RotatedRect box, float & ssid){
ssid = box.size.width>=box.size.height?box.size.height:box.size.width;
cv::Mat points;
cv::boxPoints(box, points);
// sorted box points
auto array = Mat2Vec(points);
quickSort(array, 0, 3);
float * idx1=array[0], *idx2=array[1], *idx3=array[2], *idx4=array[3];
if (array[3][1]<=array[2][1]) {
idx2 = array[3];
idx3 = array[2];
}
else{
idx2 = array[2];
idx3 = array[3];
}
if (array[1][1]<=array[0][1]){
idx1 = array[1];
idx4 = array[0];
}
else{
idx1 = array[0];
idx4 = array[1];
}
array[0] = idx1;
array[1] = idx2;
array[2] = idx3;
array[3] = idx4;
return array;
}
template<class T>
T clamp(T x, T min, T max)
{
if (x > max)
return max;
if (x < min)
return min;
return x;
}
float clampf(float x, float min, float max){
if (x > max)
return max;
if (x < min)
return min;
return x;
}
float box_score_fast(float ** box_array, cv::Mat pred){
auto array=box_array;
int width = pred.cols;
int height = pred.rows;
float box_x[4]={array[0][0], array[1][0], array[2][0], array[3][0]};
float box_y[4]={array[0][1], array[1][1], array[2][1], array[3][1]};
int xmin = clamp(int(std::floorf(*(std::min_element(box_x, box_x+4)))), 0, width - 1);
int xmax = clamp(int(std::ceilf(*(std::max_element(box_x, box_x+4)))), 0, width - 1);
int ymin = clamp(int(std::floorf(*(std::min_element(box_y, box_y+4)))), 0, height - 1);
int ymax = clamp(int(std::ceilf(*(std::max_element(box_y, box_y+4)))), 0, height - 1);
cv::Mat mask;
mask = cv::Mat::zeros(ymax - ymin + 1, xmax - xmin + 1, CV_8UC1);
cv::Point root_point[4];
root_point[0] = cv::Point(int(array[0][0])-xmin, int(array[0][1])-ymin);
root_point[1] = cv::Point(int(array[1][0])-xmin, int(array[1][1])-ymin);
root_point[2] = cv::Point(int(array[2][0])-xmin, int(array[2][1])-ymin);
root_point[3] = cv::Point(int(array[3][0])-xmin, int(array[3][1])-ymin);
const cv::Point* ppt[1] = {root_point};
int npt[] = {4};
cv::fillPoly(mask, ppt, npt, 1, cv::Scalar(1));
cv::Mat croppedImg;
pred(cv::Rect(xmin, ymin, xmax-xmin+1,ymax-ymin+1)).copyTo(croppedImg);
auto score = cv::mean(croppedImg, mask)[0];
return score;
}
std::vector<std::vector<std::vector<int>>> boxes_from_bitmap(const cv::Mat pred, const cv::Mat bitmap) {
const int min_size=3;
const int max_candidates = 1000;
const float box_thresh=0.5;
int width = bitmap.cols;
int height = bitmap.rows;
std::vector<std::vector<cv::Point>> contours;
std::vector<cv::Vec4i> hierarchy;
cv::findContours(bitmap, contours, hierarchy, cv::RETR_LIST, cv::CHAIN_APPROX_SIMPLE);
int num_contours = contours.size() >= max_candidates ? max_candidates : contours.size();
std::vector<std::vector<std::vector<int>>> boxes;
for (int _i = 0; _i < num_contours; _i++) {
float ssid;
cv::RotatedRect box = cv::minAreaRect(contours[_i]);
auto array = get_mini_boxes(box, ssid);
auto box_for_unclip = array;
//end get_mini_box
if (ssid< min_size) {
continue;
}
float score;
score = box_score_fast(array, pred);
//end box_score_fast
if (score < box_thresh)
continue;
// start for unclip
cv::RotatedRect points = unclip(box_for_unclip);
// end for unclip
cv::RotatedRect clipbox = points;
auto cliparray = get_mini_boxes(clipbox, ssid);
if (ssid < min_size+2) continue;
int dest_width=pred.cols;
int dest_height=pred.rows;
std::vector<std::vector<int>> intcliparray;
for (int num_pt=0; num_pt<4; num_pt++){
std::vector<int> a { int( clampf(roundf(cliparray[num_pt][0]/float(width)*float(dest_width)), 0, float(dest_width)) ),
int( clampf(roundf(cliparray[num_pt][1]/float(height)*float(dest_height)), 0, float(dest_height)) )};
intcliparray.push_back(a);
}
boxes.push_back(intcliparray);
}//end for
return boxes;
}
int _max(int a, int b){
return a>=b?a:b;
}
int _min(int a, int b){
return a>=b?b:a;
}
std::vector<std::vector<std::vector<int>>> filter_tag_det_res(std::vector<std::vector<std::vector<int>>> boxes,
float ratio_h, float ratio_w, cv::Mat srcimg){
int oriimg_h = srcimg.rows;
int oriimg_w = srcimg.cols;
std::vector<std::vector<std::vector<int>>> root_points;
for (int n=0; n<boxes.size(); n++){
boxes[n] = order_points_clockwise(boxes[n]);
for (int m=0; m< boxes[0].size(); m++){
boxes[n][m][0] /= ratio_w;
boxes[n][m][1] /= ratio_h;
boxes[n][m][0] = int(_min(_max(boxes[n][m][0], 0), oriimg_w-1));
boxes[n][m][1] = int(_min(_max(boxes[n][m][1], 0), oriimg_h-1));
}
}
for(int n=0; n<boxes.size(); n++){
int rect_width, rect_height;
rect_width = int(sqrt(pow(boxes[n][0][0] - boxes[n][1][0], 2) + pow(boxes[n][0][1] - boxes[n][1][1], 2)));
rect_height = int(sqrt(pow(boxes[n][0][0] - boxes[n][3][0], 2) + pow(boxes[n][0][1] - boxes[n][3][1], 2)));
if (rect_width <=10 || rect_height<=10)
continue;
root_points.push_back(boxes[n]);
}
return root_points;
}
/*
using namespace std;
// read data from txt file
cv::Mat readtxt2(std::string path, int imgw, int imgh, int imgc) {
std::cout << "read data file from txt file! " << std::endl;
ifstream in(path);
string line;
int count = 0;
int i = 0, j = 0;
std::vector<float> img_mean = {0.485, 0.456, 0.406};
std::vector<float> img_std = {0.229, 0.224, 0.225};
float trainData[imgh][imgw*imgc];
while (getline(in, line)) {
stringstream ss(line);
double x;
while (ss >> x) {
// trainData[i][j] = float(x) * img_std[j % 3] + img_mean[j % 3];
trainData[i][j] = float(x);
j++;
}
i++;
j = 0;
}
cv::Mat pred_map(imgh, imgw*imgc, CV_32FC1, (float *) trainData);
cv::Mat reshape_img = pred_map.reshape(imgc, imgh);
return reshape_img;
}
*/
//using namespace std;
//
//void writetxt(vector<vector<float>> data, std::string save_path){
//
// ofstream fout(save_path);
//
// for (int i = 0; i < data.size(); i++) {
// for (int j=0; j< data[0].size(); j++){
// fout << data[i][j] << " ";
// }
// fout << endl;
// }
// fout << endl;
// fout.close();
//}
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