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/**
* @author abelnation / http://github.com/abelnation
* @author Mugen87 / http://github.com/Mugen87
* @author WestLangley / http://github.com/WestLangley
*
* This helper must be added as a child of the light
*/
import { Line } from '../objects/Line.js';
import { Mesh } from '../objects/Mesh.js';
import { LineBasicMaterial } from '../materials/LineBasicMaterial.js';
import { MeshBasicMaterial } from '../materials/MeshBasicMaterial.js';
import { Float32BufferAttribute } from '../core/BufferAttribute.js';
import { BufferGeometry } from '../core/BufferGeometry.js';
import { BackSide } from '../constants.js';
function RectAreaLightHelper( light, color ) {
this.type = 'RectAreaLightHelper';
this.light = light;
this.color = color; // optional hardwired color for the helper
var positions = [ 1, 1, 0, - 1, 1, 0, - 1, - 1, 0, 1, - 1, 0, 1, 1, 0 ];
var geometry = new BufferGeometry();
geometry.addAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );
geometry.computeBoundingSphere();
var material = new LineBasicMaterial( { fog: false } );
Line.call( this, geometry, material );
//
var positions2 = [ 1, 1, 0, - 1, 1, 0, - 1, - 1, 0, 1, 1, 0, - 1, - 1, 0, 1, - 1, 0 ];
var geometry2 = new BufferGeometry();
geometry2.addAttribute( 'position', new Float32BufferAttribute( positions2, 3 ) );
geometry2.computeBoundingSphere();
this.add( new Mesh( geometry2, new MeshBasicMaterial( { side: BackSide, fog: false } ) ) );
this.update();
}
RectAreaLightHelper.prototype = Object.create( Line.prototype );
RectAreaLightHelper.prototype.constructor = RectAreaLightHelper;
RectAreaLightHelper.prototype.update = function () {
this.scale.set( 0.5 * this.light.width, 0.5 * this.light.height, 1 );
if ( this.color !== undefined ) {
this.material.color.set( this.color );
this.children[ 0 ].material.color.set( this.color );
} else {
this.material.color.copy( this.light.color ).multiplyScalar( this.light.intensity );
// prevent hue shift
var c = this.material.color;
var max = Math.max( c.r, c.g, c.b );
if ( max > 1 ) c.multiplyScalar( 1 / max );
this.children[ 0 ].material.color.copy( this.material.color );
}
};
RectAreaLightHelper.prototype.dispose = function () {
this.geometry.dispose();
this.material.dispose();
this.children[ 0 ].geometry.dispose();
this.children[ 0 ].material.dispose();
};
export { RectAreaLightHelper };
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