60 lines
1.6 KiB
JavaScript
60 lines
1.6 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.SpotLightHelper = function ( light ) {
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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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var geometry = new THREE.CylinderGeometry( 0, 1, 1, 8, 1, true );
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geometry.applyMatrix( new THREE.Matrix4().makeTranslation( 0, - 0.5, 0 ) );
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geometry.applyMatrix( new THREE.Matrix4().makeRotationX( - Math.PI / 2 ) );
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var material = new THREE.MeshBasicMaterial( { wireframe: true, fog: false } );
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this.cone = new THREE.Mesh( geometry, material );
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this.add( this.cone );
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this.update();
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};
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THREE.SpotLightHelper.prototype = Object.create( THREE.Object3D.prototype );
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THREE.SpotLightHelper.prototype.constructor = THREE.SpotLightHelper;
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THREE.SpotLightHelper.prototype.dispose = function () {
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this.cone.geometry.dispose();
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this.cone.material.dispose();
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};
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THREE.SpotLightHelper.prototype.update = function () {
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var vector = new THREE.Vector3();
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var vector2 = new THREE.Vector3();
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return function () {
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var coneLength = this.light.distance ? this.light.distance : 10000;
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var coneWidth = coneLength * Math.tan( this.light.angle );
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this.cone.scale.set( coneWidth, coneWidth, coneLength );
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vector.setFromMatrixPosition( this.light.matrixWorld );
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vector2.setFromMatrixPosition( this.light.target.matrixWorld );
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this.cone.lookAt( vector2.sub( vector ) );
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this.cone.material.color.copy( this.light.color ).multiplyScalar( this.light.intensity );
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};
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}();
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