| 1 | /**
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| 2 | * @author bhouston / http://exocortex.com
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| 3 | */
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| 4 |
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| 5 | THREE.Line3 = function ( start, end ) {
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| 6 |
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| 7 | this.start = ( start !== undefined ) ? start : new THREE.Vector3();
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| 8 | this.end = ( end !== undefined ) ? end : new THREE.Vector3();
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| 9 |
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| 10 | };
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| 11 |
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| 12 | THREE.Line3.prototype = {
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| 13 |
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| 14 | constructor: THREE.Line3,
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| 15 |
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| 16 | set: function ( start, end ) {
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| 17 |
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| 18 | this.start.copy( start );
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| 19 | this.end.copy( end );
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| 20 |
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| 21 | return this;
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| 22 |
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| 23 | },
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| 24 |
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| 25 | copy: function ( line ) {
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| 26 |
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| 27 | this.start.copy( line.start );
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| 28 | this.end.copy( line.end );
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| 29 |
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| 30 | return this;
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| 31 |
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| 32 | },
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| 33 |
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| 34 | center: function ( optionalTarget ) {
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| 35 |
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| 36 | var result = optionalTarget || new THREE.Vector3();
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| 37 | return result.addVectors( this.start, this.end ).multiplyScalar( 0.5 );
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| 38 |
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| 39 | },
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| 40 |
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| 41 | delta: function ( optionalTarget ) {
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| 42 |
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| 43 | var result = optionalTarget || new THREE.Vector3();
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| 44 | return result.subVectors( this.end, this.start );
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| 45 |
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| 46 | },
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| 47 |
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| 48 | distanceSq: function () {
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| 49 |
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| 50 | return this.start.distanceToSquared( this.end );
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| 51 |
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| 52 | },
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| 53 |
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| 54 | distance: function () {
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| 55 |
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| 56 | return this.start.distanceTo( this.end );
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| 57 |
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| 58 | },
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| 59 |
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| 60 | at: function ( t, optionalTarget ) {
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| 61 |
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| 62 | var result = optionalTarget || new THREE.Vector3();
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| 63 |
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| 64 | return this.delta( result ).multiplyScalar( t ).add( this.start );
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| 65 |
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| 66 | },
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| 67 |
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| 68 | closestPointToPointParameter: function() {
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| 69 |
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| 70 | var startP = new THREE.Vector3();
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| 71 | var startEnd = new THREE.Vector3();
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| 72 |
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| 73 | return function ( point, clampToLine ) {
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| 74 |
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| 75 | startP.subVectors( point, this.start );
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| 76 | startEnd.subVectors( this.end, this.start );
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| 77 |
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| 78 | var startEnd2 = startEnd.dot( startEnd );
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| 79 | var startEnd_startP = startEnd.dot( startP );
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| 80 |
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| 81 | var t = startEnd_startP / startEnd2;
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| 82 |
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| 83 | if ( clampToLine ) {
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| 84 |
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| 85 | t = THREE.Math.clamp( t, 0, 1 );
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| 86 |
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| 87 | }
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| 88 |
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| 89 | return t;
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| 90 |
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| 91 | };
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| 92 |
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| 93 | }(),
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| 94 |
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| 95 | closestPointToPoint: function ( point, clampToLine, optionalTarget ) {
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| 96 |
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| 97 | var t = this.closestPointToPointParameter( point, clampToLine );
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| 98 |
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| 99 | var result = optionalTarget || new THREE.Vector3();
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| 100 |
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| 101 | return this.delta( result ).multiplyScalar( t ).add( this.start );
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| 102 |
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| 103 | },
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| 104 |
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| 105 | applyMatrix4: function ( matrix ) {
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| 106 |
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| 107 | this.start.applyMatrix4( matrix );
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| 108 | this.end.applyMatrix4( matrix );
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| 109 |
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| 110 | return this;
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| 111 |
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| 112 | },
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| 113 |
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| 114 | equals: function ( line ) {
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| 115 |
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| 116 | return line.start.equals( this.start ) && line.end.equals( this.end );
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| 117 |
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| 118 | },
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| 119 |
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| 120 | clone: function () {
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| 121 |
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| 122 | return new THREE.Line3().copy( this );
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| 123 |
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| 124 | }
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| 125 |
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| 126 | };
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