1 /**
  2  * @author mikael emtinger / http://gomo.se/
  3  * @author alteredq / http://alteredqualia.com/
  4  */
  5 
  6 /**@constructor*/
  7 THREE.LensFlare = function ( texture, size, distance, blending, color ) {
  8 
  9 	THREE.Object3D.call( this );
 10 
 11 	this.lensFlares = [];
 12 
 13 	this.positionScreen = new THREE.Vector3();
 14 	this.customUpdateCallback = undefined;
 15 
 16 	if( texture !== undefined ) {
 17 
 18 		this.add( texture, size, distance, blending, color );
 19 
 20 	}
 21 
 22 };
 23 
 24 THREE.LensFlare.prototype = Object.create( THREE.Object3D.prototype );
 25 
 26 
 27 /*
 28  * Add: adds another flare
 29  */
 30 
 31 THREE.LensFlare.prototype.add = function ( texture, size, distance, blending, color, opacity ) {
 32 
 33 	if( size === undefined ) size = -1;
 34 	if( distance === undefined ) distance = 0;
 35 	if( opacity === undefined ) opacity = 1;
 36 	if( color === undefined ) color = new THREE.Color( 0xffffff );
 37 	if( blending === undefined ) blending = THREE.NormalBlending;
 38 
 39 	distance = Math.min( distance, Math.max( 0, distance ) );
 40 
 41 	this.lensFlares.push( { texture: texture, 			// THREE.Texture
 42 		                    size: size, 				// size in pixels (-1 = use texture.width)
 43 		                    distance: distance, 		// distance (0-1) from light source (0=at light source)
 44 		                    x: 0, y: 0, z: 0,			// screen position (-1 => 1) z = 0 is ontop z = 1 is back
 45 		                    scale: 1, 					// scale
 46 		                    rotation: 1, 				// rotation
 47 		                    opacity: opacity,			// opacity
 48 							color: color,				// color
 49 		                    blending: blending } );		// blending
 50 
 51 };
 52 
 53 
 54 /*
 55  * Update lens flares update positions on all flares based on the screen position
 56  * Set myLensFlare.customUpdateCallback to alter the flares in your project specific way.
 57  */
 58 
 59 THREE.LensFlare.prototype.updateLensFlares = function () {
 60 
 61 	var f, fl = this.lensFlares.length;
 62 	var flare;
 63 	var vecX = -this.positionScreen.x * 2;
 64 	var vecY = -this.positionScreen.y * 2;
 65 
 66 	for( f = 0; f < fl; f ++ ) {
 67 
 68 		flare = this.lensFlares[ f ];
 69 
 70 		flare.x = this.positionScreen.x + vecX * flare.distance;
 71 		flare.y = this.positionScreen.y + vecY * flare.distance;
 72 
 73 		flare.wantedRotation = flare.x * Math.PI * 0.25;
 74 		flare.rotation += ( flare.wantedRotation - flare.rotation ) * 0.25;
 75 
 76 	}
 77 
 78 };
 79 
 80 
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