82 lines
1.9 KiB
JavaScript
82 lines
1.9 KiB
JavaScript
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/**
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* @author abelnation / http://github.com/abelnation
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* @author Mugen87 / http://github.com/Mugen87
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* @author WestLangley / http://github.com/WestLangley
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*/
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import { Object3D } from '../core/Object3D.js';
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import { Line } from '../objects/Line.js';
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import { LineBasicMaterial } from '../materials/LineBasicMaterial.js';
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import { BufferGeometry } from '../core/BufferGeometry.js';
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import { BufferAttribute } from '../core/BufferAttribute.js';
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function RectAreaLightHelper( 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 material = new LineBasicMaterial( { fog: false } );
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var geometry = new BufferGeometry();
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geometry.addAttribute( 'position', new BufferAttribute( new Float32Array( 5 * 3 ), 3 ) );
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this.line = new Line( geometry, material );
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this.add( this.line );
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this.update();
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}
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RectAreaLightHelper.prototype = Object.create( Object3D.prototype );
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RectAreaLightHelper.prototype.constructor = RectAreaLightHelper;
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RectAreaLightHelper.prototype.dispose = function () {
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this.children[ 0 ].geometry.dispose();
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this.children[ 0 ].material.dispose();
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};
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RectAreaLightHelper.prototype.update = function () {
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// calculate new dimensions of the helper
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var hx = this.light.width * 0.5;
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var hy = this.light.height * 0.5;
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var position = this.line.geometry.attributes.position;
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var array = position.array;
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// update vertices
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array[ 0 ] = hx; array[ 1 ] = - hy; array[ 2 ] = 0;
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array[ 3 ] = hx; array[ 4 ] = hy; array[ 5 ] = 0;
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array[ 6 ] = - hx; array[ 7 ] = hy; array[ 8 ] = 0;
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array[ 9 ] = - hx; array[ 10 ] = - hy; array[ 11 ] = 0;
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array[ 12 ] = hx; array[ 13 ] = - hy; array[ 14 ] = 0;
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position.needsUpdate = true;
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if ( this.color !== undefined ) {
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this.line.material.color.set( this.color );
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} else {
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this.line.material.color.copy( this.light.color );
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}
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};
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export { RectAreaLightHelper };
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