58 lines
1.6 KiB
JavaScript
58 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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*/
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THREE.HemisphereLightHelper = function ( light, sphereSize ) {
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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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this.colors = [ new THREE.Color(), new THREE.Color() ];
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var geometry = new THREE.SphereGeometry( sphereSize, 4, 2 );
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geometry.applyMatrix( new THREE.Matrix4().makeRotationX( - Math.PI / 2 ) );
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for ( var i = 0, il = 8; i < il; i ++ ) {
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geometry.faces[ i ].color = this.colors[ i < 4 ? 0 : 1 ];
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}
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var material = new THREE.MeshBasicMaterial( { vertexColors: THREE.FaceColors, wireframe: true } );
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this.lightSphere = new THREE.Mesh( geometry, material );
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this.add( this.lightSphere );
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this.update();
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};
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THREE.HemisphereLightHelper.prototype = Object.create( THREE.Object3D.prototype );
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THREE.HemisphereLightHelper.prototype.constructor = THREE.HemisphereLightHelper;
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THREE.HemisphereLightHelper.prototype.dispose = function () {
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this.lightSphere.geometry.dispose();
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this.lightSphere.material.dispose();
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};
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THREE.HemisphereLightHelper.prototype.update = function () {
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var vector = new THREE.Vector3();
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return function () {
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this.colors[ 0 ].copy( this.light.color ).multiplyScalar( this.light.intensity );
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this.colors[ 1 ].copy( this.light.groundColor ).multiplyScalar( this.light.intensity );
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this.lightSphere.lookAt( vector.setFromMatrixPosition( this.light.matrixWorld ).negate() );
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this.lightSphere.geometry.colorsNeedUpdate = true;
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}
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}();
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