407 lines
13 KiB
JavaScript
407 lines
13 KiB
JavaScript
/**
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* @author spidersharma / http://eduperiment.com/
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*
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* Inspired from Unreal Engine
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* https://docs.unrealengine.com/latest/INT/Engine/Rendering/PostProcessEffects/Bloom/
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*/
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THREE.UnrealBloomPass = function ( resolution, strength, radius, threshold ) {
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THREE.Pass.call( this );
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this.strength = ( strength !== undefined ) ? strength : 1;
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this.radius = radius;
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this.threshold = threshold;
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this.resolution = ( resolution !== undefined ) ? new THREE.Vector2( resolution.x, resolution.y ) : new THREE.Vector2( 256, 256 );
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// create color only once here, reuse it later inside the render function
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this.clearColor = new THREE.Color( 0, 0, 0 );
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// render targets
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var pars = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter, format: THREE.RGBAFormat };
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this.renderTargetsHorizontal = [];
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this.renderTargetsVertical = [];
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this.nMips = 5;
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var resx = Math.round( this.resolution.x / 2 );
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var resy = Math.round( this.resolution.y / 2 );
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this.renderTargetBright = new THREE.WebGLRenderTarget( resx, resy, pars );
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this.renderTargetBright.texture.name = "UnrealBloomPass.bright";
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this.renderTargetBright.texture.generateMipmaps = false;
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for ( var i = 0; i < this.nMips; i ++ ) {
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var renderTargetHorizonal = new THREE.WebGLRenderTarget( resx, resy, pars );
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renderTargetHorizonal.texture.name = "UnrealBloomPass.h" + i;
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renderTargetHorizonal.texture.generateMipmaps = false;
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this.renderTargetsHorizontal.push( renderTargetHorizonal );
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var renderTargetVertical = new THREE.WebGLRenderTarget( resx, resy, pars );
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renderTargetVertical.texture.name = "UnrealBloomPass.v" + i;
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renderTargetVertical.texture.generateMipmaps = false;
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this.renderTargetsVertical.push( renderTargetVertical );
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resx = Math.round( resx / 2 );
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resy = Math.round( resy / 2 );
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}
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// luminosity high pass material
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if ( THREE.LuminosityHighPassShader === undefined )
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console.error( "THREE.UnrealBloomPass relies on THREE.LuminosityHighPassShader" );
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var highPassShader = THREE.LuminosityHighPassShader;
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this.highPassUniforms = THREE.UniformsUtils.clone( highPassShader.uniforms );
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this.highPassUniforms[ "luminosityThreshold" ].value = threshold;
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this.highPassUniforms[ "smoothWidth" ].value = 0.01;
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this.materialHighPassFilter = new THREE.ShaderMaterial( {
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uniforms: this.highPassUniforms,
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vertexShader: highPassShader.vertexShader,
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fragmentShader: highPassShader.fragmentShader,
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defines: {}
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} );
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// Gaussian Blur Materials
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this.separableBlurMaterials = [];
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var kernelSizeArray = [ 3, 5, 7, 9, 11 ];
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var resx = Math.round( this.resolution.x / 2 );
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var resy = Math.round( this.resolution.y / 2 );
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for ( var i = 0; i < this.nMips; i ++ ) {
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this.separableBlurMaterials.push( this.getSeperableBlurMaterial( kernelSizeArray[ i ] ) );
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this.separableBlurMaterials[ i ].uniforms[ "texSize" ].value = new THREE.Vector2( resx, resy );
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resx = Math.round( resx / 2 );
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resy = Math.round( resy / 2 );
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}
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// Composite material
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this.compositeMaterial = this.getCompositeMaterial( this.nMips );
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this.compositeMaterial.uniforms[ "blurTexture1" ].value = this.renderTargetsVertical[ 0 ].texture;
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this.compositeMaterial.uniforms[ "blurTexture2" ].value = this.renderTargetsVertical[ 1 ].texture;
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this.compositeMaterial.uniforms[ "blurTexture3" ].value = this.renderTargetsVertical[ 2 ].texture;
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this.compositeMaterial.uniforms[ "blurTexture4" ].value = this.renderTargetsVertical[ 3 ].texture;
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this.compositeMaterial.uniforms[ "blurTexture5" ].value = this.renderTargetsVertical[ 4 ].texture;
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this.compositeMaterial.uniforms[ "bloomStrength" ].value = strength;
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this.compositeMaterial.uniforms[ "bloomRadius" ].value = 0.1;
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this.compositeMaterial.needsUpdate = true;
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var bloomFactors = [ 1.0, 0.8, 0.6, 0.4, 0.2 ];
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this.compositeMaterial.uniforms[ "bloomFactors" ].value = bloomFactors;
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this.bloomTintColors = [ new THREE.Vector3( 1, 1, 1 ), new THREE.Vector3( 1, 1, 1 ), new THREE.Vector3( 1, 1, 1 ),
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new THREE.Vector3( 1, 1, 1 ), new THREE.Vector3( 1, 1, 1 ) ];
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this.compositeMaterial.uniforms[ "bloomTintColors" ].value = this.bloomTintColors;
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// copy material
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if ( THREE.CopyShader === undefined ) {
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console.error( "THREE.UnrealBloomPass relies on THREE.CopyShader" );
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}
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var copyShader = THREE.CopyShader;
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this.copyUniforms = THREE.UniformsUtils.clone( copyShader.uniforms );
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this.copyUniforms[ "opacity" ].value = 1.0;
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this.materialCopy = new THREE.ShaderMaterial( {
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uniforms: this.copyUniforms,
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vertexShader: copyShader.vertexShader,
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fragmentShader: copyShader.fragmentShader,
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blending: THREE.AdditiveBlending,
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depthTest: false,
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depthWrite: false,
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transparent: true
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} );
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this.enabled = true;
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this.needsSwap = false;
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this.oldClearColor = new THREE.Color();
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this.oldClearAlpha = 1;
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this.basic = new THREE.MeshBasicMaterial();
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this.fsQuad = new THREE.Pass.FullScreenQuad( null );
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};
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THREE.UnrealBloomPass.prototype = Object.assign( Object.create( THREE.Pass.prototype ), {
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constructor: THREE.UnrealBloomPass,
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dispose: function () {
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for ( var i = 0; i < this.renderTargetsHorizontal.length; i ++ ) {
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this.renderTargetsHorizontal[ i ].dispose();
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}
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for ( var i = 0; i < this.renderTargetsVertical.length; i ++ ) {
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this.renderTargetsVertical[ i ].dispose();
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}
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this.renderTargetBright.dispose();
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},
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setSize: function ( width, height ) {
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var resx = Math.round( width / 2 );
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var resy = Math.round( height / 2 );
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this.renderTargetBright.setSize( resx, resy );
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for ( var i = 0; i < this.nMips; i ++ ) {
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this.renderTargetsHorizontal[ i ].setSize( resx, resy );
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this.renderTargetsVertical[ i ].setSize( resx, resy );
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this.separableBlurMaterials[ i ].uniforms[ "texSize" ].value = new THREE.Vector2( resx, resy );
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resx = Math.round( resx / 2 );
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resy = Math.round( resy / 2 );
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}
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},
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render: function ( renderer, writeBuffer, readBuffer, deltaTime, maskActive ) {
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this.oldClearColor.copy( renderer.getClearColor() );
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this.oldClearAlpha = renderer.getClearAlpha();
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var oldAutoClear = renderer.autoClear;
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renderer.autoClear = false;
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renderer.setClearColor( this.clearColor, 0 );
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if ( maskActive ) renderer.state.buffers.stencil.setTest( false );
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// Render input to screen
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if ( this.renderToScreen ) {
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this.fsQuad.material = this.basic;
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this.basic.map = readBuffer.texture;
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renderer.setRenderTarget( null );
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renderer.clear();
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this.fsQuad.render( renderer );
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}
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// 1. Extract Bright Areas
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this.highPassUniforms[ "tDiffuse" ].value = readBuffer.texture;
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this.highPassUniforms[ "luminosityThreshold" ].value = this.threshold;
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this.fsQuad.material = this.materialHighPassFilter;
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renderer.setRenderTarget( this.renderTargetBright );
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renderer.clear();
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this.fsQuad.render( renderer );
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// 2. Blur All the mips progressively
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var inputRenderTarget = this.renderTargetBright;
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for ( var i = 0; i < this.nMips; i ++ ) {
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this.fsQuad.material = this.separableBlurMaterials[ i ];
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this.separableBlurMaterials[ i ].uniforms[ "colorTexture" ].value = inputRenderTarget.texture;
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this.separableBlurMaterials[ i ].uniforms[ "direction" ].value = THREE.UnrealBloomPass.BlurDirectionX;
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renderer.setRenderTarget( this.renderTargetsHorizontal[ i ] );
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renderer.clear();
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this.fsQuad.render( renderer );
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this.separableBlurMaterials[ i ].uniforms[ "colorTexture" ].value = this.renderTargetsHorizontal[ i ].texture;
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this.separableBlurMaterials[ i ].uniforms[ "direction" ].value = THREE.UnrealBloomPass.BlurDirectionY;
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renderer.setRenderTarget( this.renderTargetsVertical[ i ] );
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renderer.clear();
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this.fsQuad.render( renderer );
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inputRenderTarget = this.renderTargetsVertical[ i ];
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}
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// Composite All the mips
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this.fsQuad.material = this.compositeMaterial;
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this.compositeMaterial.uniforms[ "bloomStrength" ].value = this.strength;
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this.compositeMaterial.uniforms[ "bloomRadius" ].value = this.radius;
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this.compositeMaterial.uniforms[ "bloomTintColors" ].value = this.bloomTintColors;
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renderer.setRenderTarget( this.renderTargetsHorizontal[ 0 ] );
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renderer.clear();
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this.fsQuad.render( renderer );
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// Blend it additively over the input texture
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this.fsQuad.material = this.materialCopy;
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this.copyUniforms[ "tDiffuse" ].value = this.renderTargetsHorizontal[ 0 ].texture;
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if ( maskActive ) renderer.state.buffers.stencil.setTest( true );
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if ( this.renderToScreen ) {
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renderer.setRenderTarget( null );
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this.fsQuad.render( renderer );
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} else {
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renderer.setRenderTarget( readBuffer );
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this.fsQuad.render( renderer );
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}
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// Restore renderer settings
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renderer.setClearColor( this.oldClearColor, this.oldClearAlpha );
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renderer.autoClear = oldAutoClear;
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},
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getSeperableBlurMaterial: function ( kernelRadius ) {
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return new THREE.ShaderMaterial( {
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defines: {
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"KERNEL_RADIUS": kernelRadius,
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"SIGMA": kernelRadius
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},
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uniforms: {
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"colorTexture": { value: null },
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"texSize": { value: new THREE.Vector2( 0.5, 0.5 ) },
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"direction": { value: new THREE.Vector2( 0.5, 0.5 ) }
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},
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vertexShader:
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"varying vec2 vUv;\n\
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void main() {\n\
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vUv = uv;\n\
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gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n\
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}",
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fragmentShader:
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"#include <common>\
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varying vec2 vUv;\n\
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uniform sampler2D colorTexture;\n\
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uniform vec2 texSize;\
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uniform vec2 direction;\
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\
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float gaussianPdf(in float x, in float sigma) {\
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return 0.39894 * exp( -0.5 * x * x/( sigma * sigma))/sigma;\
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}\
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// void main() {\n\
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// vec2 invSize = 1.0 / texSize;\
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// float fSigma = float(SIGMA);\
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// float weightSum = gaussianPdf(0.0, fSigma);\
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// vec3 diffuseSum = texture2D( colorTexture, vUv).rgb * weightSum;\
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// for( int i = 1; i < KERNEL_RADIUS; i ++ ) {\
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// float x = float(i);\
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// float w = gaussianPdf(x, fSigma);\
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// vec2 uvOffset = direction * invSize * x;\
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// vec3 sample1 = texture2D( colorTexture, vUv + uvOffset).rgb;\
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// vec3 sample2 = texture2D( colorTexture, vUv - uvOffset).rgb;\
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// diffuseSum += (sample1 + sample2) * w;\
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// weightSum += 2.0 * w;\
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// }\
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// gl_FragColor = vec4(diffuseSum/weightSum, 1.0);\n\
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void main() {\n\
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vec2 invSize = 1.0 / texSize;\
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float fSigma = float(SIGMA);\
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float weightSum = gaussianPdf(0.0, fSigma);\
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vec4 diffuseSum = texture2D( colorTexture, vUv).rgba * weightSum;\
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for( int i = 1; i < KERNEL_RADIUS; i ++ ) {\
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float x = float(i);\
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float w = gaussianPdf(x, fSigma);\
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vec2 uvOffset = direction * invSize * x;\
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vec4 sample1 = texture2D( colorTexture, vUv + uvOffset).rgba;\
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vec4 sample2 = texture2D( colorTexture, vUv - uvOffset).rgba;\
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diffuseSum += (sample1 + sample2) * w;\
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weightSum += 2.0 * w;\
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}\
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gl_FragColor = vec4(diffuseSum/weightSum);\n\
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}"
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} );
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},
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getCompositeMaterial: function ( nMips ) {
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return new THREE.ShaderMaterial( {
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defines: {
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"NUM_MIPS": nMips
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},
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uniforms: {
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"blurTexture1": { value: null },
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"blurTexture2": { value: null },
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"blurTexture3": { value: null },
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"blurTexture4": { value: null },
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"blurTexture5": { value: null },
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"dirtTexture": { value: null },
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"bloomStrength": { value: 1.0 },
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"bloomFactors": { value: null },
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"bloomTintColors": { value: null },
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"bloomRadius": { value: 0.0 }
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},
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vertexShader:
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"varying vec2 vUv;\n\
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void main() {\n\
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vUv = uv;\n\
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gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n\
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}",
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fragmentShader:
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"varying vec2 vUv;\
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uniform sampler2D blurTexture1;\
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uniform sampler2D blurTexture2;\
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uniform sampler2D blurTexture3;\
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uniform sampler2D blurTexture4;\
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uniform sampler2D blurTexture5;\
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uniform sampler2D dirtTexture;\
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uniform float bloomStrength;\
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uniform float bloomRadius;\
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uniform float bloomFactors[NUM_MIPS];\
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uniform vec3 bloomTintColors[NUM_MIPS];\
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\
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float lerpBloomFactor(const in float factor) { \
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float mirrorFactor = 1.2 - factor;\
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return mix(factor, mirrorFactor, bloomRadius);\
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}\
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\
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void main() {\
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gl_FragColor = bloomStrength * ( lerpBloomFactor(bloomFactors[0]) * vec4(bloomTintColors[0], 1.0) * texture2D(blurTexture1, vUv) + \
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lerpBloomFactor(bloomFactors[1]) * vec4(bloomTintColors[1], 1.0) * texture2D(blurTexture2, vUv) + \
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lerpBloomFactor(bloomFactors[2]) * vec4(bloomTintColors[2], 1.0) * texture2D(blurTexture3, vUv) + \
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lerpBloomFactor(bloomFactors[3]) * vec4(bloomTintColors[3], 1.0) * texture2D(blurTexture4, vUv) + \
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lerpBloomFactor(bloomFactors[4]) * vec4(bloomTintColors[4], 1.0) * texture2D(blurTexture5, vUv) );\
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}"
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} );
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}
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} );
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THREE.UnrealBloomPass.BlurDirectionX = new THREE.Vector2( 1.0, 0.0 );
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THREE.UnrealBloomPass.BlurDirectionY = new THREE.Vector2( 0.0, 1.0 );
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