/**
* @author alteredq / http://alteredqualia.com/
* @author mrdoob / http://mrdoob.com/
* @author WestLangley / http://github.com/WestLangley
*/
export class DirectionalLightHelper {
   // THREE.DirectionalLightHelper = function(light, size) {
   //    THREE.Object3D.call(this);
   //    this.light = light;
   //    this.light.updateMatrixWorld();
   //    this.matrix = light.matrixWorld;
   //    this.matrixAutoUpdate = false;
   //    size = size || 1;
   //    var geometry = new THREE.Geometry();
   //    geometry.vertices.push(
   //       new THREE.Vector3(- size, size, 0),
   //       new THREE.Vector3(size, size, 0),
   //       new THREE.Vector3(size, - size, 0),
   //       new THREE.Vector3(- size, - size, 0),
   //       new THREE.Vector3(- size, size, 0)
   //    );
   //    var material = new THREE.LineBasicMaterial({ fog: false });
   //    material.color.copy(this.light.color).multiplyScalar(this.light.intensity);
   //    this.lightPlane = new THREE.Line(geometry, material);
   //    this.add(this.lightPlane);
   //    geometry = new THREE.Geometry();
   //    geometry.vertices.push(
   //       new THREE.Vector3(),
   //       new THREE.Vector3()
   //    );
   //    material = new THREE.LineBasicMaterial({ fog: false });
   //    material.color.copy(this.light.color).multiplyScalar(this.light.intensity);
   //    this.targetLine = new THREE.Line(geometry, material);
   //    this.add(this.targetLine);
   //    this.update();
   // };
   // THREE.DirectionalLightHelper.prototype = Object.create(THREE.Object3D.prototype);
   // THREE.DirectionalLightHelper.prototype.constructor = THREE.DirectionalLightHelper;
   // THREE.DirectionalLightHelper.prototype.dispose = function() {
   //    this.lightPlane.geometry.dispose();
   //    this.lightPlane.material.dispose();
   //    this.targetLine.geometry.dispose();
   //    this.targetLine.material.dispose();
   // };
   // THREE.DirectionalLightHelper.prototype.update = function() {
   //    var v1 = new THREE.Vector3();
   //    var v2 = new THREE.Vector3();
   //    var v3 = new THREE.Vector3();
   //    return function() {
   //       v1.setFromMatrixPosition(this.light.matrixWorld);
   //       v2.setFromMatrixPosition(this.light.target.matrixWorld);
   //       v3.subVectors(v2, v1);
   //       this.lightPlane.lookAt(v3);
   //       this.lightPlane.material.color.copy(this.light.color).multiplyScalar(this.light.intensity);
   //       this.targetLine.geometry.vertices[1].copy(v3);
   //       this.targetLine.geometry.verticesNeedUpdate = true;
   //       this.targetLine.material.color.copy(this.lightPlane.material.color);
   //    };
   // } ();
}