104 lines
2.3 KiB
JavaScript
104 lines
2.3 KiB
JavaScript
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/**
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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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import { Vector3 } from '../math/Vector3.js';
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import { Object3D } from '../core/Object3D.js';
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import { LineSegments } from '../objects/LineSegments.js';
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import { LineBasicMaterial } from '../materials/LineBasicMaterial.js';
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import { Float32BufferAttribute } from '../core/BufferAttribute.js';
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import { BufferGeometry } from '../core/BufferGeometry.js';
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function SpotLightHelper( light, color ) {
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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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this.color = color;
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var geometry = new BufferGeometry();
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var positions = [
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0, 0, 0, 0, 0, 1,
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0, 0, 0, 1, 0, 1,
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0, 0, 0, - 1, 0, 1,
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0, 0, 0, 0, 1, 1,
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0, 0, 0, 0, - 1, 1
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];
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for ( var i = 0, j = 1, l = 32; i < l; i ++, j ++ ) {
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var p1 = ( i / l ) * Math.PI * 2;
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var p2 = ( j / l ) * Math.PI * 2;
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positions.push(
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Math.cos( p1 ), Math.sin( p1 ), 1,
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Math.cos( p2 ), Math.sin( p2 ), 1
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);
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}
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geometry.addAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );
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var material = new LineBasicMaterial( { fog: false } );
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this.cone = new LineSegments( geometry, material );
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this.add( this.cone );
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this.update();
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}
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SpotLightHelper.prototype = Object.create( Object3D.prototype );
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SpotLightHelper.prototype.constructor = SpotLightHelper;
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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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SpotLightHelper.prototype.update = function () {
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var vector = new Vector3();
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var vector2 = new Vector3();
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return function update() {
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this.light.updateMatrixWorld();
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var coneLength = this.light.distance ? this.light.distance : 1000;
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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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if ( this.color !== undefined ) {
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this.cone.material.color.set( this.color );
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} else {
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this.cone.material.color.copy( this.light.color );
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}
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};
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}();
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export { SpotLightHelper };
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