97 lines
2.3 KiB
JavaScript
97 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 Mugen87 / https://github.com/Mugen87
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*/
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import { Vector3 } from '../math/Vector3.js';
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import { Color } from '../math/Color.js';
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import { Object3D } from '../core/Object3D.js';
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import { Mesh } from '../objects/Mesh.js';
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import { VertexColors } from '../constants.js';
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import { MeshBasicMaterial } from '../materials/MeshBasicMaterial.js';
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import { OctahedronBufferGeometry } from '../geometries/OctahedronGeometry.js';
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import { BufferAttribute } from '../core/BufferAttribute.js';
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function HemisphereLightHelper( light, size, 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 OctahedronBufferGeometry( size );
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geometry.rotateY( Math.PI * 0.5 );
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this.material = new MeshBasicMaterial( { wireframe: true, fog: false } );
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if ( this.color === undefined ) this.material.vertexColors = VertexColors;
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var position = geometry.getAttribute( 'position' );
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var colors = new Float32Array( position.count * 3 );
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geometry.addAttribute( 'color', new BufferAttribute( colors, 3 ) );
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this.add( new Mesh( geometry, this.material ) );
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this.update();
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}
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HemisphereLightHelper.prototype = Object.create( Object3D.prototype );
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HemisphereLightHelper.prototype.constructor = HemisphereLightHelper;
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HemisphereLightHelper.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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HemisphereLightHelper.prototype.update = function () {
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var vector = new Vector3();
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var color1 = new Color();
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var color2 = new Color();
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return function update() {
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var mesh = this.children[ 0 ];
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if ( this.color !== undefined ) {
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this.material.color.set( this.color );
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} else {
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var colors = mesh.geometry.getAttribute( 'color' );
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color1.copy( this.light.color );
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color2.copy( this.light.groundColor );
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for ( var i = 0, l = colors.count; i < l; i ++ ) {
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var color = ( i < ( l / 2 ) ) ? color1 : color2;
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colors.setXYZ( i, color.r, color.g, color.b );
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}
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colors.needsUpdate = true;
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}
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mesh.lookAt( vector.setFromMatrixPosition( this.light.matrixWorld ).negate() );
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};
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}();
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export { HemisphereLightHelper };
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