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/**
* @author alteredq / http://alteredqualia.com/
*/
THREE.BloomPass = function ( strength, kernelSize, sigma, resolution ) {
THREE.Pass.call( this );
strength = ( strength !== undefined ) ? strength : 1;
kernelSize = ( kernelSize !== undefined ) ? kernelSize : 25;
sigma = ( sigma !== undefined ) ? sigma : 4.0;
resolution = ( resolution !== undefined ) ? resolution : 256;
// render targets
var pars = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter, format: THREE.RGBAFormat };
this.renderTargetX = new THREE.WebGLRenderTarget( resolution, resolution, pars );
this.renderTargetX.texture.name = "BloomPass.x";
this.renderTargetY = new THREE.WebGLRenderTarget( resolution, resolution, pars );
this.renderTargetY.texture.name = "BloomPass.y";
// copy material
if ( THREE.CopyShader === undefined )
console.error( "THREE.BloomPass relies on THREE.CopyShader" );
var copyShader = THREE.CopyShader;
this.copyUniforms = THREE.UniformsUtils.clone( copyShader.uniforms );
this.copyUniforms[ "opacity" ].value = strength;
this.materialCopy = new THREE.ShaderMaterial( {
uniforms: this.copyUniforms,
vertexShader: copyShader.vertexShader,
fragmentShader: copyShader.fragmentShader,
blending: THREE.AdditiveBlending,
transparent: true
} );
// convolution material
if ( THREE.ConvolutionShader === undefined )
console.error( "THREE.BloomPass relies on THREE.ConvolutionShader" );
var convolutionShader = THREE.ConvolutionShader;
this.convolutionUniforms = THREE.UniformsUtils.clone( convolutionShader.uniforms );
this.convolutionUniforms[ "uImageIncrement" ].value = THREE.BloomPass.blurX;
this.convolutionUniforms[ "cKernel" ].value = THREE.ConvolutionShader.buildKernel( sigma );
this.materialConvolution = new THREE.ShaderMaterial( {
uniforms: this.convolutionUniforms,
vertexShader: convolutionShader.vertexShader,
fragmentShader: convolutionShader.fragmentShader,
defines: {
"KERNEL_SIZE_FLOAT": kernelSize.toFixed( 1 ),
"KERNEL_SIZE_INT": kernelSize.toFixed( 0 )
}
} );
this.needsSwap = false;
this.fsQuad = new THREE.Pass.FullScreenQuad( null );
};
THREE.BloomPass.prototype = Object.assign( Object.create( THREE.Pass.prototype ), {
constructor: THREE.BloomPass,
render: function ( renderer, writeBuffer, readBuffer, deltaTime, maskActive ) {
if ( maskActive ) renderer.context.disable( renderer.context.STENCIL_TEST );
// Render quad with blured scene into texture (convolution pass 1)
this.fsQuad.material = this.materialConvolution;
this.convolutionUniforms[ "tDiffuse" ].value = readBuffer.texture;
this.convolutionUniforms[ "uImageIncrement" ].value = THREE.BloomPass.blurX;
renderer.setRenderTarget( this.renderTargetX );
renderer.clear();
this.fsQuad.render( renderer );
// Render quad with blured scene into texture (convolution pass 2)
this.convolutionUniforms[ "tDiffuse" ].value = this.renderTargetX.texture;
this.convolutionUniforms[ "uImageIncrement" ].value = THREE.BloomPass.blurY;
renderer.setRenderTarget( this.renderTargetY );
renderer.clear();
this.fsQuad.render( renderer );
// Render original scene with superimposed blur to texture
this.fsQuad.material = this.materialCopy;
this.copyUniforms[ "tDiffuse" ].value = this.renderTargetY.texture;
if ( maskActive ) renderer.context.enable( renderer.context.STENCIL_TEST );
renderer.setRenderTarget( readBuffer );
if ( this.clear ) renderer.clear();
this.fsQuad.render( renderer );
}
} );
THREE.BloomPass.blurX = new THREE.Vector2( 0.001953125, 0.0 );
THREE.BloomPass.blurY = new THREE.Vector2( 0.0, 0.001953125 );
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