fireball/lib/helpers/DirectionalLightHelper.js

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2018-12-25 13:59:22 +00:00
/**
* @author alteredq / http://alteredqualia.com/
* @author mrdoob / http://mrdoob.com/
* @author WestLangley / http://github.com/WestLangley
*/
import { Vector3 } from '../math/Vector3.js';
import { Object3D } from '../core/Object3D.js';
import { Line } from '../objects/Line.js';
import { Float32BufferAttribute } from '../core/BufferAttribute.js';
import { BufferGeometry } from '../core/BufferGeometry.js';
import { LineBasicMaterial } from '../materials/LineBasicMaterial.js';
function DirectionalLightHelper( light, size, color ) {
Object3D.call( this );
this.light = light;
this.light.updateMatrixWorld();
this.matrix = light.matrixWorld;
this.matrixAutoUpdate = false;
this.color = color;
if ( size === undefined ) size = 1;
var geometry = new BufferGeometry();
geometry.addAttribute( 'position', new Float32BufferAttribute( [
- size, size, 0,
size, size, 0,
size, - size, 0,
- size, - size, 0,
- size, size, 0
], 3 ) );
var material = new LineBasicMaterial( { fog: false } );
this.lightPlane = new Line( geometry, material );
this.add( this.lightPlane );
geometry = new BufferGeometry();
geometry.addAttribute( 'position', new Float32BufferAttribute( [ 0, 0, 0, 0, 0, 1 ], 3 ) );
this.targetLine = new Line( geometry, material );
this.add( this.targetLine );
this.update();
}
DirectionalLightHelper.prototype = Object.create( Object3D.prototype );
DirectionalLightHelper.prototype.constructor = DirectionalLightHelper;
DirectionalLightHelper.prototype.dispose = function () {
this.lightPlane.geometry.dispose();
this.lightPlane.material.dispose();
this.targetLine.geometry.dispose();
this.targetLine.material.dispose();
};
DirectionalLightHelper.prototype.update = function () {
var v1 = new Vector3();
var v2 = new Vector3();
var v3 = new Vector3();
return function update() {
v1.setFromMatrixPosition( this.light.matrixWorld );
v2.setFromMatrixPosition( this.light.target.matrixWorld );
v3.subVectors( v2, v1 );
this.lightPlane.lookAt( v3 );
if ( this.color !== undefined ) {
this.lightPlane.material.color.set( this.color );
this.targetLine.material.color.set( this.color );
} else {
this.lightPlane.material.color.copy( this.light.color );
this.targetLine.material.color.copy( this.light.color );
}
this.targetLine.lookAt( v3 );
this.targetLine.scale.z = v3.length();
};
}();
export { DirectionalLightHelper };