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three.js

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提交 ef188f3c 编写于 作者: M Mr.doob
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build/three.js
浏览文件 @ ef188f3c
...@@ -5454,53 +5454,70 @@ THREE.Ray.prototype = { ...@@ -5454,53 +5454,70 @@ THREE.Ray.prototype = {
}(), }(),
distanceSqToSegment: function ( v0, v1, optionalPointOnRay, optionalPointOnSegment ) { distanceSqToSegment: function () {
// from http://www.geometrictools.com/LibMathematics/Distance/Wm5DistRay3Segment3.cpp var segCenter = new THREE.Vector3();
// It returns the min distance between the ray and the segment var segDir = new THREE.Vector3();
// defined by v0 and v1 var diff = new THREE.Vector3();
// It can also set two optional targets :
// - The closest point on the ray return function ( v0, v1, optionalPointOnRay, optionalPointOnSegment ) {
// - The closest point on the segment
// from http://www.geometrictools.com/LibMathematics/Distance/Wm5DistRay3Segment3.cpp
// It returns the min distance between the ray and the segment
// defined by v0 and v1
// It can also set two optional targets :
// - The closest point on the ray
// - The closest point on the segment
segCenter.copy( v0 ).add( v1 ).multiplyScalar( 0.5 );
segDir.copy( v1 ).sub( v0 ).normalize();
diff.copy( this.origin ).sub( segCenter );
var segExtent = v0.distanceTo( v1 ) * 0.5;
var a01 = - this.direction.dot( segDir );
var b0 = diff.dot( this.direction );
var b1 = - diff.dot( segDir );
var c = diff.lengthSq();
var det = Math.abs( 1 - a01 * a01 );
var s0, s1, sqrDist, extDet;
if ( det > 0 ) {
// The ray and segment are not parallel.
s0 = a01 * b1 - b0;
s1 = a01 * b0 - b1;
extDet = segExtent * det;
var segCenter = v0.clone().add( v1 ).multiplyScalar( 0.5 ); if ( s0 >= 0 ) {
var segDir = v1.clone().sub( v0 ).normalize();
var segExtent = v0.distanceTo( v1 ) * 0.5;
var diff = this.origin.clone().sub( segCenter );
var a01 = - this.direction.dot( segDir );
var b0 = diff.dot( this.direction );
var b1 = - diff.dot( segDir );
var c = diff.lengthSq();
var det = Math.abs( 1 - a01 * a01 );
var s0, s1, sqrDist, extDet;
if ( det > 0 ) { if ( s1 >= - extDet ) {
// The ray and segment are not parallel. if ( s1 <= extDet ) {
s0 = a01 * b1 - b0; // region 0
s1 = a01 * b0 - b1; // Minimum at interior points of ray and segment.
extDet = segExtent * det;
if ( s0 >= 0 ) { var invDet = 1 / det;
s0 *= invDet;
s1 *= invDet;
sqrDist = s0 * ( s0 + a01 * s1 + 2 * b0 ) + s1 * ( a01 * s0 + s1 + 2 * b1 ) + c;
if ( s1 >= - extDet ) { } else {
if ( s1 <= extDet ) { // region 1
// region 0 s1 = segExtent;
// Minimum at interior points of ray and segment. s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
var invDet = 1 / det; }
s0 *= invDet;
s1 *= invDet;
sqrDist = s0 * ( s0 + a01 * s1 + 2 * b0 ) + s1 * ( a01 * s0 + s1 + 2 * b1 ) + c;
} else { } else {
// region 1 // region 5
s1 = segExtent; s1 = - segExtent;
s0 = Math.max( 0, - ( a01 * s1 + b0 ) ); s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c; sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
...@@ -5508,69 +5525,62 @@ THREE.Ray.prototype = { ...@@ -5508,69 +5525,62 @@ THREE.Ray.prototype = {
} else { } else {
// region 5 if ( s1 <= - extDet ) {
s1 = - segExtent; // region 4
s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
} s0 = Math.max( 0, - ( - a01 * segExtent + b0 ) );
s1 = ( s0 > 0 ) ? - segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );
sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
} else { } else if ( s1 <= extDet ) {
if ( s1 <= - extDet ) { // region 3
// region 4 s0 = 0;
s1 = Math.min( Math.max( - segExtent, - b1 ), segExtent );
sqrDist = s1 * ( s1 + 2 * b1 ) + c;
s0 = Math.max( 0, - ( - a01 * segExtent + b0 ) ); } else {
s1 = ( s0 > 0 ) ? - segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );
sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
} else if ( s1 <= extDet ) { // region 2
// region 3 s0 = Math.max( 0, - ( a01 * segExtent + b0 ) );
s1 = ( s0 > 0 ) ? segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );
sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
s0 = 0; }
s1 = Math.min( Math.max( - segExtent, - b1 ), segExtent );
sqrDist = s1 * ( s1 + 2 * b1 ) + c;
} else { }
// region 2 } else {
s0 = Math.max( 0, - ( a01 * segExtent + b0 ) ); // Ray and segment are parallel.
s1 = ( s0 > 0 ) ? segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );
sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
} s1 = ( a01 > 0 ) ? - segExtent : segExtent;
s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
} }
} else { if ( optionalPointOnRay ) {
// Ray and segment are parallel.
s1 = ( a01 > 0 ) ? - segExtent : segExtent; optionalPointOnRay.copy( this.direction ).multiplyScalar( s0 ).add( this.origin );
s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;
}
if ( optionalPointOnRay ) { }
optionalPointOnRay.copy( this.direction.clone().multiplyScalar( s0 ).add( this.origin ) ); if ( optionalPointOnSegment ) {
} optionalPointOnSegment.copy( segDir ).multiplyScalar( s1 ).add( segCenter );
if ( optionalPointOnSegment ) { }
optionalPointOnSegment.copy( segDir.clone().multiplyScalar( s1 ).add( segCenter ) ); return sqrDist;
} };
return sqrDist; }(),
},
isIntersectionSphere: function ( sphere ) { isIntersectionSphere: function ( sphere ) {
......
build/three.min.js
浏览文件 @ ef188f3c
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