82 lines
2.2 KiB
JavaScript
82 lines
2.2 KiB
JavaScript
/**
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* @author alteredq / http://alteredqualia.com/
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* @author mrdoob / http://mrdoob.com/
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* @author WestLangley / http://github.com/WestLangley
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*/
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THREE.DirectionalLightHelper = function ( light, size ) {
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THREE.Object3D.call( this );
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this.light = light;
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this.light.updateMatrixWorld();
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this.matrix = light.matrixWorld;
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this.matrixAutoUpdate = false;
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size = size || 1;
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var geometry = new THREE.Geometry();
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geometry.vertices.push(
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new THREE.Vector3( - size, size, 0 ),
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new THREE.Vector3( size, size, 0 ),
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new THREE.Vector3( size, - size, 0 ),
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new THREE.Vector3( - size, - size, 0 ),
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new THREE.Vector3( - size, size, 0 )
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);
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var material = new THREE.LineBasicMaterial( { fog: false } );
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material.color.copy( this.light.color ).multiplyScalar( this.light.intensity );
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this.lightPlane = new THREE.Line( geometry, material );
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this.add( this.lightPlane );
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geometry = new THREE.Geometry();
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geometry.vertices.push(
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new THREE.Vector3(),
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new THREE.Vector3()
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);
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material = new THREE.LineBasicMaterial( { fog: false } );
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material.color.copy( this.light.color ).multiplyScalar( this.light.intensity );
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this.targetLine = new THREE.Line( geometry, material );
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this.add( this.targetLine );
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this.update();
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};
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THREE.DirectionalLightHelper.prototype = Object.create( THREE.Object3D.prototype );
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THREE.DirectionalLightHelper.prototype.constructor = THREE.DirectionalLightHelper;
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THREE.DirectionalLightHelper.prototype.dispose = function () {
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this.lightPlane.geometry.dispose();
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this.lightPlane.material.dispose();
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this.targetLine.geometry.dispose();
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this.targetLine.material.dispose();
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};
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THREE.DirectionalLightHelper.prototype.update = function () {
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var v1 = new THREE.Vector3();
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var v2 = new THREE.Vector3();
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var v3 = new THREE.Vector3();
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return function () {
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v1.setFromMatrixPosition( this.light.matrixWorld );
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v2.setFromMatrixPosition( this.light.target.matrixWorld );
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v3.subVectors( v2, v1 );
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this.lightPlane.lookAt( v3 );
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this.lightPlane.material.color.copy( this.light.color ).multiplyScalar( this.light.intensity );
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this.targetLine.geometry.vertices[ 1 ].copy( v3 );
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this.targetLine.geometry.verticesNeedUpdate = true;
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this.targetLine.material.color.copy( this.lightPlane.material.color );
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};
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}();
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