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/**
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 * @author alteredq / http://alteredqualia.com/
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 */
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THREE.DotScreenPass = function ( center, angle, scale ) {
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	var shader = THREE.ShaderExtras[ "dotscreen" ];
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	this.uniforms = THREE.UniformsUtils.clone( shader.uniforms );
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	if ( center !== undefined )
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		this.uniforms[ "center" ].value.copy( center );
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	if ( angle !== undefined )	this.uniforms[ "angle"].value = angle;
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	if ( scale !== undefined )	this.uniforms[ "scale"].value = scale;
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	this.material = new THREE.ShaderMaterial( {
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		uniforms: this.uniforms,
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		vertexShader: shader.vertexShader,
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		fragmentShader: shader.fragmentShader
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	} );
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	this.enabled = true;
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	this.renderToScreen = false;
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	this.needsSwap = true;
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};
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THREE.DotScreenPass.prototype = {
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	render: function ( renderer, writeBuffer, readBuffer, delta ) {
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		this.uniforms[ "tDiffuse" ].texture = readBuffer;
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		this.uniforms[ "tSize" ].value.set( readBuffer.width, readBuffer.height );
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		THREE.EffectComposer.quad.material = this.material;
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		if ( this.renderToScreen ) {
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			renderer.render( THREE.EffectComposer.scene, THREE.EffectComposer.camera );
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		} else {
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			renderer.render( THREE.EffectComposer.scene, THREE.EffectComposer.camera, writeBuffer, false );
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		}
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	}
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};
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