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| /** | |
| * @author WestLangley / http://github.com/WestLangley | |
| * @author zz85 / http://github.com/zz85 | |
| * @author bhouston / http://clara.io | |
| * | |
| * Creates an arrow for visualizing directions | |
| * | |
| * Parameters: | |
| * dir - Vector3 | |
| * origin - Vector3 | |
| * length - Number | |
| * color - color in hex value | |
| * headLength - Number | |
| * headWidth - Number | |
| */ | |
| THREE.ArrowHelper = ( function () { | |
| var lineGeometry = new THREE.Geometry(); | |
| lineGeometry.vertices.push( new THREE.Vector3( 0, 0, 0 ), new THREE.Vector3( 0, 1, 0 ) ); | |
| var coneGeometry = new THREE.CylinderGeometry( 0, 0.5, 1, 5, 1 ); | |
| coneGeometry.translate( 0, - 0.5, 0 ); | |
| return function ArrowHelper( dir, origin, length, color, headLength, headWidth ) { | |
| // dir is assumed to be normalized | |
| THREE.Object3D.call( this ); | |
| if ( color === undefined ) color = 0xffff00; | |
| if ( length === undefined ) length = 1; | |
| if ( headLength === undefined ) headLength = 0.2 * length; | |
| if ( headWidth === undefined ) headWidth = 0.2 * headLength; | |
| this.position.copy( origin ); | |
| this.line = new THREE.Line( lineGeometry, new THREE.LineBasicMaterial( { color: color } ) ); | |
| this.line.matrixAutoUpdate = false; | |
| this.add( this.line ); | |
| this.cone = new THREE.Mesh( coneGeometry, new THREE.MeshBasicMaterial( { color: color } ) ); | |
| this.cone.matrixAutoUpdate = false; | |
| this.add( this.cone ); | |
| this.setDirection( dir ); | |
| this.setLength( length, headLength, headWidth ); | |
| } | |
| }() ); | |
| THREE.ArrowHelper.prototype = Object.create( THREE.Object3D.prototype ); | |
| THREE.ArrowHelper.prototype.constructor = THREE.ArrowHelper; | |
| THREE.ArrowHelper.prototype.setDirection = ( function () { | |
| var axis = new THREE.Vector3(); | |
| var radians; | |
| return function setDirection( dir ) { | |
| // dir is assumed to be normalized | |
| if ( dir.y > 0.99999 ) { | |
| this.quaternion.set( 0, 0, 0, 1 ); | |
| } else if ( dir.y < - 0.99999 ) { | |
| this.quaternion.set( 1, 0, 0, 0 ); | |
| } else { | |
| axis.set( dir.z, 0, - dir.x ).normalize(); | |
| radians = Math.acos( dir.y ); | |
| this.quaternion.setFromAxisAngle( axis, radians ); | |
| } | |
| }; | |
| }() ); | |
| THREE.ArrowHelper.prototype.setLength = function ( length, headLength, headWidth ) { | |
| if ( headLength === undefined ) headLength = 0.2 * length; | |
| if ( headWidth === undefined ) headWidth = 0.2 * headLength; | |
| this.line.scale.set( 1, Math.max( 0, length - headLength ), 1 ); | |
| this.line.updateMatrix(); | |
| this.cone.scale.set( headWidth, headLength, headWidth ); | |
| this.cone.position.y = length; | |
| this.cone.updateMatrix(); | |
| }; | |
| THREE.ArrowHelper.prototype.setColor = function ( color ) { | |
| this.line.material.color.set( color ); | |
| this.cone.material.color.set( color ); | |
| }; |