Added forgotten file.

src/extras/plugins/LensFlarePlugin.js

+/**
+ * @author mikael emtinger / http://gomo.se/
+ * @author alteredq / http://alteredqualia.com/
+ */
+
+THREE.LensFlarePlugin = function ( ) {
+
+	var _gl, _renderer, _lensFlare = {};
+
+	this.init = function ( renderer ) {
+
+		_gl = renderer.context;
+		_renderer = renderer;
+
+		_lensFlare.vertices = new Float32Array( 8 + 8 );
+		_lensFlare.faces = new Uint16Array( 6 );
+
+		var i = 0;
+		_lensFlare.vertices[ i++ ] = -1; _lensFlare.vertices[ i++ ] = -1;	// vertex
+		_lensFlare.vertices[ i++ ] = 0;  _lensFlare.vertices[ i++ ] = 0;	// uv... etc.
+
+		_lensFlare.vertices[ i++ ] = 1;  _lensFlare.vertices[ i++ ] = -1;
+		_lensFlare.vertices[ i++ ] = 1;  _lensFlare.vertices[ i++ ] = 0;
+
+		_lensFlare.vertices[ i++ ] = 1;  _lensFlare.vertices[ i++ ] = 1;
+		_lensFlare.vertices[ i++ ] = 1;  _lensFlare.vertices[ i++ ] = 1;
+
+		_lensFlare.vertices[ i++ ] = -1; _lensFlare.vertices[ i++ ] = 1;
+		_lensFlare.vertices[ i++ ] = 0;  _lensFlare.vertices[ i++ ] = 1;
+
+		i = 0;
+		_lensFlare.faces[ i++ ] = 0; _lensFlare.faces[ i++ ] = 1; _lensFlare.faces[ i++ ] = 2;
+		_lensFlare.faces[ i++ ] = 0; _lensFlare.faces[ i++ ] = 2; _lensFlare.faces[ i++ ] = 3;
+
+		// buffers
+
+		_lensFlare.vertexBuffer     = _gl.createBuffer();
+		_lensFlare.elementBuffer    = _gl.createBuffer();
+
+		_gl.bindBuffer( _gl.ARRAY_BUFFER, _lensFlare.vertexBuffer );
+		_gl.bufferData( _gl.ARRAY_BUFFER, _lensFlare.vertices, _gl.STATIC_DRAW );
+
+		_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, _lensFlare.elementBuffer );
+		_gl.bufferData( _gl.ELEMENT_ARRAY_BUFFER, _lensFlare.faces, _gl.STATIC_DRAW );
+
+		// textures
+
+		_lensFlare.tempTexture      = _gl.createTexture();
+		_lensFlare.occlusionTexture = _gl.createTexture();
+
+		_gl.bindTexture( _gl.TEXTURE_2D, _lensFlare.tempTexture );
+		_gl.texImage2D( _gl.TEXTURE_2D, 0, _gl.RGB, 16, 16, 0, _gl.RGB, _gl.UNSIGNED_BYTE, null );
+		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_WRAP_S, _gl.CLAMP_TO_EDGE );
+		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_WRAP_T, _gl.CLAMP_TO_EDGE );
+		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_MAG_FILTER, _gl.NEAREST );
+		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_MIN_FILTER, _gl.NEAREST );
+
+		_gl.bindTexture( _gl.TEXTURE_2D, _lensFlare.occlusionTexture );
+		_gl.texImage2D( _gl.TEXTURE_2D, 0, _gl.RGBA, 16, 16, 0, _gl.RGBA, _gl.UNSIGNED_BYTE, null );
+		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_WRAP_S, _gl.CLAMP_TO_EDGE );
+		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_WRAP_T, _gl.CLAMP_TO_EDGE );
+		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_MAG_FILTER, _gl.NEAREST );
+		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_MIN_FILTER, _gl.NEAREST );
+
+		if ( _gl.getParameter( _gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS ) <= 0 ) {
+
+			_lensFlare.hasVertexTexture = false;
+			_lensFlare.program = createProgram( THREE.ShaderFlares[ "lensFlare" ] );
+
+		} else {
+
+			_lensFlare.hasVertexTexture = true;
+			_lensFlare.program = createProgram( THREE.ShaderFlares[ "lensFlareVertexTexture" ] );
+
+		}
+
+		_lensFlare.attributes = {};
+		_lensFlare.uniforms = {};
+
+		_lensFlare.attributes.vertex       = _gl.getAttribLocation ( _lensFlare.program, "position" );
+		_lensFlare.attributes.uv           = _gl.getAttribLocation ( _lensFlare.program, "uv" );
+
+		_lensFlare.uniforms.renderType     = _gl.getUniformLocation( _lensFlare.program, "renderType" );
+		_lensFlare.uniforms.map            = _gl.getUniformLocation( _lensFlare.program, "map" );
+		_lensFlare.uniforms.occlusionMap   = _gl.getUniformLocation( _lensFlare.program, "occlusionMap" );
+		_lensFlare.uniforms.opacity        = _gl.getUniformLocation( _lensFlare.program, "opacity" );
+		_lensFlare.uniforms.color          = _gl.getUniformLocation( _lensFlare.program, "color" );
+		_lensFlare.uniforms.scale          = _gl.getUniformLocation( _lensFlare.program, "scale" );
+		_lensFlare.uniforms.rotation       = _gl.getUniformLocation( _lensFlare.program, "rotation" );
+		_lensFlare.uniforms.screenPosition = _gl.getUniformLocation( _lensFlare.program, "screenPosition" );
+
+		_lensFlare.attributesEnabled = false;
+
+	};
+
+
+	/*
+	 * Render lens flares
+	 * Method: renders 16x16 0xff00ff-colored points scattered over the light source area,
+	 *         reads these back and calculates occlusion.
+	 *         Then _lensFlare.update_lensFlares() is called to re-position and
+	 *         update transparency of flares. Then they are rendered.
+	 *
+	 */
+
+	this.render = function ( scene, camera, viewportWidth, viewportHeight ) {
+
+		var _flaresList = scene.__webglFlares;
+
+		var object;
+
+		var o, ol = _flaresList.length;
+		var f, fl, flare;
+
+		var tempPosition = new THREE.Vector3();
+
+		var invAspect = viewportHeight / viewportWidth;
+		var halfViewportWidth = viewportWidth * 0.5;
+		var halfViewportHeight = viewportHeight * 0.5;
+
+		var size = 16 / viewportHeight;
+
+		var scale = new THREE.Vector2( size * invAspect, size );
+
+		var screenPosition = new THREE.Vector3( 1, 1, 0 );
+		var screenPositionPixels = new THREE.Vector2( 1, 1 );
+
+		var uniforms = _lensFlare.uniforms;
+		var attributes = _lensFlare.attributes;
+
+		// set _lensFlare program and reset blending
+
+		_gl.useProgram( _lensFlare.program );
+
+		if ( ! _lensFlare.attributesEnabled ) {
+
+			_gl.enableVertexAttribArray( _lensFlare.attributes.vertex );
+			_gl.enableVertexAttribArray( _lensFlare.attributes.uv );
+
+			_lensFlare.attributesEnabled = true;
+
+		}
+
+		// loop through all lens flares to update their occlusion and positions
+		// setup gl and common used attribs/unforms
+
+		_gl.uniform1i( uniforms.occlusionMap, 0 );
+		_gl.uniform1i( uniforms.map, 1 );
+
+		_gl.bindBuffer( _gl.ARRAY_BUFFER, _lensFlare.vertexBuffer );
+		_gl.vertexAttribPointer( attributes.vertex, 2, _gl.FLOAT, false, 2 * 8, 0 );
+		_gl.vertexAttribPointer( attributes.uv, 2, _gl.FLOAT, false, 2 * 8, 8 );
+
+		_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, _lensFlare.elementBuffer );
+
+		_gl.disable( _gl.CULL_FACE );
+		_gl.depthMask( false );
+
+		for ( o = 0; o < ol; o ++ ) {
+
+			size = 16 / viewportHeight;
+			scale.set( size * invAspect, size );
+
+			// calc object screen position
+
+			object = _flaresList[ o ];
+
+			tempPosition.set( object.matrixWorld.n14, object.matrixWorld.n24, object.matrixWorld.n34 );
+
+			camera.matrixWorldInverse.multiplyVector3( tempPosition );
+			camera.projectionMatrix.multiplyVector3( tempPosition );
+
+
+			// setup arrays for gl programs
+
+			screenPosition.copy( tempPosition )
+
+			screenPositionPixels.x = screenPosition.x * halfViewportWidth + halfViewportWidth;
+			screenPositionPixels.y = screenPosition.y * halfViewportHeight + halfViewportHeight;
+
+
+			// screen cull
+
+			if ( _lensFlare.hasVertexTexture || (
+				screenPositionPixels.x > 0 &&
+				screenPositionPixels.x < viewportWidth &&
+				screenPositionPixels.y > 0 &&
+				screenPositionPixels.y < viewportHeight ) ) {
+
+				// save current RGB to temp texture
+
+				_gl.activeTexture( _gl.TEXTURE1 );
+				_gl.bindTexture( _gl.TEXTURE_2D, _lensFlare.tempTexture );
+				_gl.copyTexImage2D( _gl.TEXTURE_2D, 0, _gl.RGB, screenPositionPixels.x - 8, screenPositionPixels.y - 8, 16, 16, 0 );
+
+
+				// render pink quad
+
+				_gl.uniform1i( uniforms.renderType, 0 );
+				_gl.uniform2f( uniforms.scale, scale.x, scale.y );
+				_gl.uniform3f( uniforms.screenPosition, screenPosition.x, screenPosition.y, screenPosition.z );
+
+				_gl.disable( _gl.BLEND );
+				_gl.enable( _gl.DEPTH_TEST );
+
+				_gl.drawElements( _gl.TRIANGLES, 6, _gl.UNSIGNED_SHORT, 0 );
+
+
+				// copy result to occlusionMap
+
+				_gl.activeTexture( _gl.TEXTURE0 );
+				_gl.bindTexture( _gl.TEXTURE_2D, _lensFlare.occlusionTexture );
+				_gl.copyTexImage2D( _gl.TEXTURE_2D, 0, _gl.RGBA, screenPositionPixels.x - 8, screenPositionPixels.y - 8, 16, 16, 0 );
+
+
+				// restore graphics
+
+				_gl.uniform1i( uniforms.renderType, 1 );
+				_gl.disable( _gl.DEPTH_TEST );
+
+				_gl.activeTexture( _gl.TEXTURE1 );
+				_gl.bindTexture( _gl.TEXTURE_2D, _lensFlare.tempTexture );
+				_gl.drawElements( _gl.TRIANGLES, 6, _gl.UNSIGNED_SHORT, 0 );
+
+
+				// update object positions
+
+				object.positionScreen.copy( screenPosition )
+
+				if ( object.customUpdateCallback ) {
+
+					object.customUpdateCallback( object );
+
+				} else {
+
+					object.updateLensFlares();
+
+				}
+
+				// render flares
+
+				_gl.uniform1i( uniforms.renderType, 2 );
+				_gl.enable( _gl.BLEND );
+
+				for ( f = 0, fl = object.lensFlares.length; f < fl; f ++ ) {
+
+					flare = object.lensFlares[ f ];
+
+					if ( flare.opacity > 0.001 && flare.scale > 0.001 ) {
+
+						screenPosition.x = flare.x;
+						screenPosition.y = flare.y;
+						screenPosition.z = flare.z;
+
+						size = flare.size * flare.scale / viewportHeight;
+
+						scale.x = size * invAspect;
+						scale.y = size;
+
+						_gl.uniform3f( uniforms.screenPosition, screenPosition.x, screenPosition.y, screenPosition.z );
+						_gl.uniform2f( uniforms.scale, scale.x, scale.y );
+						_gl.uniform1f( uniforms.rotation, flare.rotation );
+
+						_gl.uniform1f( uniforms.opacity, flare.opacity );
+						_gl.uniform3f( uniforms.color, flare.color.r, flare.color.g, flare.color.b );
+
+						_renderer.setBlending( flare.blending );
+						_renderer.setTexture( flare.texture, 1 );
+
+						_gl.drawElements( _gl.TRIANGLES, 6, _gl.UNSIGNED_SHORT, 0 );
+
+					}
+
+				}
+
+			}
+
+		}
+
+		// restore gl
+
+		_gl.enable( _gl.CULL_FACE );
+		_gl.enable( _gl.DEPTH_TEST );
+		_gl.depthMask( true );
+
+	};
+
+	function createProgram ( shader ) {
+
+		var program = _gl.createProgram();
+
+		var fragmentShader = _gl.createShader( _gl.FRAGMENT_SHADER );
+		var vertexShader = _gl.createShader( _gl.VERTEX_SHADER );
+
+		_gl.shaderSource( fragmentShader, shader.fragmentShader );
+		_gl.shaderSource( vertexShader, shader.vertexShader );
+
+		_gl.compileShader( fragmentShader );
+		_gl.compileShader( vertexShader );
+
+		_gl.attachShader( program, fragmentShader );
+		_gl.attachShader( program, vertexShader );
+
+		_gl.linkProgram( program );
+
+		return program;
+
+	};
+
+};
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