126 lines
2.2 KiB
JavaScript
126 lines
2.2 KiB
JavaScript
/**
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* @author bhouston / http://exocortex.com
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*/
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THREE.Line3 = function ( start, end ) {
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this.start = ( start !== undefined ) ? start : new THREE.Vector3();
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this.end = ( end !== undefined ) ? end : new THREE.Vector3();
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};
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THREE.Line3.prototype = {
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constructor: THREE.Line3,
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set: function ( start, end ) {
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this.start.copy( start );
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this.end.copy( end );
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return this;
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},
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copy: function ( line ) {
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this.start.copy( line.start );
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this.end.copy( line.end );
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return this;
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},
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center: function ( optionalTarget ) {
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var result = optionalTarget || new THREE.Vector3();
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return result.addVectors( this.start, this.end ).multiplyScalar( 0.5 );
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},
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delta: function ( optionalTarget ) {
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var result = optionalTarget || new THREE.Vector3();
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return result.subVectors( this.end, this.start );
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},
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distanceSq: function () {
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return this.start.distanceToSquared( this.end );
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},
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distance: function () {
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return this.start.distanceTo( this.end );
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},
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at: function ( t, optionalTarget ) {
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var result = optionalTarget || new THREE.Vector3();
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return this.delta( result ).multiplyScalar( t ).add( this.start );
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},
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closestPointToPointParameter: function () {
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var startP = new THREE.Vector3();
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var startEnd = new THREE.Vector3();
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return function ( point, clampToLine ) {
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startP.subVectors( point, this.start );
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startEnd.subVectors( this.end, this.start );
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var startEnd2 = startEnd.dot( startEnd );
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var startEnd_startP = startEnd.dot( startP );
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var t = startEnd_startP / startEnd2;
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if ( clampToLine ) {
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t = THREE.Math.clamp( t, 0, 1 );
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}
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return t;
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};
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}(),
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closestPointToPoint: function ( point, clampToLine, optionalTarget ) {
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var t = this.closestPointToPointParameter( point, clampToLine );
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var result = optionalTarget || new THREE.Vector3();
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return this.delta( result ).multiplyScalar( t ).add( this.start );
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},
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applyMatrix4: function ( matrix ) {
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this.start.applyMatrix4( matrix );
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this.end.applyMatrix4( matrix );
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return this;
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},
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equals: function ( line ) {
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return line.start.equals( this.start ) && line.end.equals( this.end );
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},
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clone: function () {
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return new THREE.Line3().copy( this );
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}
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};
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