Skip to content

D
dragonwell8_jdk

openanolis / dragonwell8_jdk

通知 4
Star 2
Fork 0
D
dragonwell8_jdk
提交 ed328ea1 编写于 作者: M mrkam
浏览文件
操作

7027682: /applets/Fractal demo needs to be improved 

Reviewed-by: alexp
上级 4e480fb9
隐藏空白更改
内联 并排
Showing with 138 addition and 84 deletion
src/share/demo/applets/Fractal/CLSFractal.java
浏览文件 @ ed328ea1
/*
* Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
......@@ -29,13 +29,13 @@
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
*/
import java.awt.Graphics;
import java.util.Stack;
import java.util.Vector;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.List;
/**
* A (not-yet) Context sensitive L-System Fractal applet class.
......@@ -50,9 +50,11 @@ import java.awt.event.*;
*
* @author Jim Graham
*/
@SuppressWarnings("serial")
public class CLSFractal
extends java.applet.Applet
implements Runnable, MouseListener {
extends java.applet.Applet
implements Runnable, MouseListener {
Thread kicker;
ContextLSystem cls;
int fractLevel = 1;
......@@ -67,31 +69,48 @@ public class CLSFractal
int border;
boolean normalizescaling;
@Override
public void init() {
String s;
cls = new ContextLSystem(this);
s = getParameter("level");
if (s != null) fractLevel = Integer.parseInt(s);
if (s != null) {
fractLevel = Integer.parseInt(s);
}
s = getParameter("incremental");
if (s != null) incrementalUpdates = s.equalsIgnoreCase("true");
if (s != null) {
incrementalUpdates = s.equalsIgnoreCase("true");
}
s = getParameter("delay");
if (s != null) repaintDelay = Integer.parseInt(s);
if (s != null) {
repaintDelay = Integer.parseInt(s);
}
s = getParameter("startAngle");
if (s != null) startAngle = Float.valueOf(s).floatValue();
if (s != null) {
startAngle = Float.valueOf(s).floatValue();
}
s = getParameter("rotAngle");
if (s != null) rotAngle = Float.valueOf(s).floatValue();
if (s != null) {
rotAngle = Float.valueOf(s).floatValue();
}
rotAngle = rotAngle / 360 * 2 * 3.14159265358f;
s = getParameter("border");
if (s != null) border = Integer.parseInt(s);
if (s != null) {
border = Integer.parseInt(s);
}
s = getParameter("normalizescale");
if (s != null) normalizescaling = s.equalsIgnoreCase("true");
if (s != null) {
normalizescaling = s.equalsIgnoreCase("true");
}
addMouseListener(this);
}
@Override
public void destroy() {
removeMouseListener(this);
}
@Override
public void run() {
Thread me = Thread.currentThread();
boolean needsRepaint = false;
......@@ -99,7 +118,10 @@ public class CLSFractal
cls.generate();
if (kicker == me && incrementalUpdates) {
repaint();
try {Thread.sleep(repaintDelay);} catch (InterruptedException e){}
try {
Thread.sleep(repaintDelay);
} catch (InterruptedException ignored) {
}
} else {
needsRepaint = true;
}
......@@ -112,22 +134,27 @@ public class CLSFractal
}
}
@Override
public void start() {
kicker = new Thread(this);
kicker.start();
}
@Override
public void stop() {
kicker = null;
}
/*1.1 event handling */
/*1.1 event handling */
@Override
public void mouseClicked(MouseEvent e) {
}
@Override
public void mousePressed(MouseEvent e) {
}
@Override
public void mouseReleased(MouseEvent e) {
cls = new ContextLSystem(this);
savedPath = null;
......@@ -135,14 +162,16 @@ public class CLSFractal
e.consume();
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
String savedPath;
@Override
public void paint(Graphics g) {
String fractalPath = cls.getPath();
if (fractalPath == null) {
......@@ -155,13 +184,14 @@ public class CLSFractal
}
for (int i = 0; i < border; i++) {
g.draw3DRect(i, i, getSize().width - i * 2, getSize().height - i * 2,false);
g.draw3DRect(i, i, getSize().width - i * 2, getSize().height - i * 2,
false);
}
render(g, fractalPath);
}
void render(Graphics g, String path) {
Stack turtleStack = new Stack();
Stack<CLSTurtle> turtleStack = new Stack<CLSTurtle>();
CLSTurtle turtle;
if (g == null) {
......@@ -172,11 +202,13 @@ public class CLSFractal
turtle = new CLSTurtle(startAngle, 0, 0, 0, 0, 1, 1);
} else {
float frwidth = Xmax - Xmin;
if (frwidth == 0)
if (frwidth == 0) {
frwidth = 1;
}
float frheight = Ymax - Ymin;
if (frheight == 0)
if (frheight == 0) {
frheight = 1;
}
float xscale = (getSize().width - border * 2 - 1) / frwidth;
float yscale = (getSize().height - border * 2 - 1) / frheight;
int xoff = border;
......@@ -184,84 +216,102 @@ public class CLSFractal
if (normalizescaling) {
if (xscale < yscale) {
yoff += ((getSize().height - border * 2)
- ((Ymax - Ymin) * xscale)) / 2;
- ((Ymax - Ymin) * xscale)) / 2;
yscale = xscale;
} else if (yscale < xscale) {
xoff += ((getSize().width - border * 2)
- ((Xmax - Xmin) * yscale)) / 2;
- ((Xmax - Xmin) * yscale)) / 2;
xscale = yscale;
}
}
turtle = new CLSTurtle(startAngle, 0 - Xmin, 0 - Ymin,
xoff, yoff, xscale, yscale);
xoff, yoff, xscale, yscale);
}
for (int pos = 0; pos < path.length(); pos++) {
switch (path.charAt(pos)) {
case '+':
turtle.rotate(rotAngle);
break;
case '-':
turtle.rotate(-rotAngle);
break;
case '[':
turtleStack.push(turtle);
turtle = new CLSTurtle(turtle);
break;
case ']':
turtle = (CLSTurtle) turtleStack.pop();
break;
case 'f':
turtle.jump();
break;
case 'F':
if (g == null) {
includePt(turtle.X, turtle.Y);
case '+':
turtle.rotate(rotAngle);
break;
case '-':
turtle.rotate(-rotAngle);
break;
case '[':
turtleStack.push(turtle);
turtle = new CLSTurtle(turtle);
break;
case ']':
turtle = turtleStack.pop();
break;
case 'f':
turtle.jump();
includePt(turtle.X, turtle.Y);
} else {
turtle.draw(g);
}
break;
default:
break;
break;
case 'F':
if (g == null) {
includePt(turtle.X, turtle.Y);
turtle.jump();
includePt(turtle.X, turtle.Y);
} else {
turtle.draw(g);
}
break;
default:
break;
}
}
}
void includePt(float x, float y) {
if (x < Xmin)
if (x < Xmin) {
Xmin = x;
if (x > Xmax)
}
if (x > Xmax) {
Xmax = x;
if (y < Ymin)
}
if (y < Ymin) {
Ymin = y;
if (y > Ymax)
}
if (y > Ymax) {
Ymax = y;
}
}
@Override
public String getAppletInfo() {
return "Title: CLSFractal 1.1f, 27 Mar 1995 \nAuthor: Jim Graham \nA "
+ "(not yet) Context Sensitive L-System production rule. \n"
+ "This class encapsulates a production rule for a Context "
+ "Sensitive\n L-System \n(pred, succ, lContext, rContext)."
+ " The matches() method, however, does not \n(yet) verify "
+ "the lContext and rContext parts of the rule.";
}
public String getAppletInfo() {
return "Title: CLSFractal 1.1f, 27 Mar 1995 \nAuthor: Jim Graham \nA (not yet) Context Sensitive L-System production rule. \nThis class encapsulates a production rule for a Context Sensitive\n L-System \n(pred, succ, lContext, rContext). The matches() method, however, does not \n(yet) verify the lContext and rContext parts of the rule.";
}
public String[][] getParameterInfo() {
String[][] info = {
{"level", "int", "Maximum number of recursions. Default is 1."},
{"incremental","boolean","Whether or not to repaint between recursions. Default is true."},
{"delay","integer","Sets delay between repaints. Default is 50."},
{"startAngle","float","Sets the starting angle. Default is 0."},
{"rotAngle","float","Sets the rotation angle. Default is 45."},
{"border","integer","Width of border. Default is 2."},
{"normalizeScale","boolean","Whether or not to normalize the scaling. Default is true."},
{"pred","String","Initializes the rules for Context Sensitive L-Systems."},
{"succ","String","Initializes the rules for Context Sensitive L-Systems."},
{"lContext","String","Initializes the rules for Context Sensitive L-Systems."},
{"rContext","String","Initializes the rules for Context Sensitive L-Systems."}
};
return info;
}
@Override
public String[][] getParameterInfo() {
String[][] info = {
{ "level", "int", "Maximum number of recursions. Default is 1." },
{ "incremental", "boolean", "Whether or not to repaint between "
+ "recursions. Default is true." },
{ "delay", "integer", "Sets delay between repaints. Default is 50." },
{ "startAngle", "float", "Sets the starting angle. Default is 0." },
{ "rotAngle", "float", "Sets the rotation angle. Default is 45." },
{ "border", "integer", "Width of border. Default is 2." },
{ "normalizeScale", "boolean", "Whether or not to normalize "
+ "the scaling. Default is true." },
{ "pred", "String",
"Initializes the rules for Context Sensitive L-Systems." },
{ "succ", "String",
"Initializes the rules for Context Sensitive L-Systems." },
{ "lContext", "String",
"Initializes the rules for Context Sensitive L-Systems." },
{ "rContext", "String",
"Initializes the rules for Context Sensitive L-Systems." }
};
return info;
}
}
/**
* A Logo turtle class designed to support Context sensitive L-Systems.
*
......@@ -271,6 +321,7 @@ public class CLSFractal
* @author Jim Graham
*/
class CLSTurtle {
float angle;
float X;
float Y;
......@@ -280,7 +331,7 @@ class CLSTurtle {
int yoff;
public CLSTurtle(float ang, float x, float y,
int xorg, int yorg, float sx, float sy) {
int xorg, int yorg, float sx, float sy) {
angle = ang;
scaleX = sx;
scaleY = sy;
......@@ -313,12 +364,13 @@ class CLSTurtle {
float x = X + (float) Math.cos(angle) * scaleX;
float y = Y + (float) Math.sin(angle) * scaleY;
g.drawLine((int) X + xoff, (int) Y + yoff,
(int) x + xoff, (int) y + yoff);
(int) x + xoff, (int) y + yoff);
X = x;
Y = y;
}
}
/**
* A (non-)Context sensitive L-System class.
*
......@@ -330,22 +382,23 @@ class CLSTurtle {
* @author Jim Graham
*/
class ContextLSystem {
String axiom;
Vector rules = new Vector();
List<CLSRule> rules = new ArrayList<CLSRule>();
int level;
public ContextLSystem(java.applet.Applet app) {
axiom = app.getParameter("axiom");
int num = 1;
while (true) {
String pred = app.getParameter("pred"+num);
String succ = app.getParameter("succ"+num);
String pred = app.getParameter("pred" + num);
String succ = app.getParameter("succ" + num);
if (pred == null || succ == null) {
break;
}
rules.addElement(new CLSRule(pred, succ,
app.getParameter("lContext"+num),
app.getParameter("rContext"+num)));
rules.add(new CLSRule(pred, succ,
app.getParameter("lContext" + num),
app.getParameter("rContext" + num)));
num++;
}
currentPath = new StringBuffer(axiom);
......@@ -355,7 +408,6 @@ class ContextLSystem {
public int getLevel() {
return level;
}
StringBuffer currentPath;
public synchronized String getPath() {
......@@ -385,7 +437,7 @@ class ContextLSystem {
public CLSRule findRule(int pos) {
for (int i = 0; i < rules.size(); i++) {
CLSRule rule = (CLSRule) rules.elementAt(i);
CLSRule rule = rules.get(i);
if (rule.matches(currentPath, pos)) {
return rule;
}
......@@ -394,6 +446,7 @@ class ContextLSystem {
}
}
/**
* A Context sensitive L-System production rule.
*
......@@ -405,6 +458,7 @@ class ContextLSystem {
* @author Jim Graham
*/
class CLSRule {
String pred;
String succ;
String lContext;
......
src/share/demo/applets/Fractal/example1.html
浏览文件 @ ed328ea1
......@@ -5,7 +5,7 @@
<body>
<h1>Fractals 1.1</h1>
<hr>
<applet applet code="CLSFractal.class" width=500 height=120>
<applet code="CLSFractal.class" width=500 height=120>
<param name=level value="5">
<param name=rotangle value="45">
<param name=succ1 value="F-F++F-F">
......
Markdown is supported
0% 或 .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑！
想要评论请 注册 或