three-stdlib/shaders/DepthLimitedBlurShader.cjs.map

stand-alone library of threejs examples

{"version":3,"file":"DepthLimitedBlurShader.cjs","sources":["../../src/shaders/DepthLimitedBlurShader.ts"],"sourcesContent":["import { Vector2 } from 'three'\nimport type { IUniform, Texture } from 'three'\nimport type { IShader } from './types'\n\nexport type DepthLimitedBlurShaderDefines = {\n  DEPTH_PACKING: number\n  KERNEL_RADIUS: number\n  PERSPECTIVE_CAMERA: number\n}\n\nexport type DepthLimitedBlurShaderUniforms = {\n  cameraFar: IUniform<number>\n  cameraNear: IUniform<number>\n  depthCutoff: IUniform<number>\n  sampleUvOffsets: IUniform<Vector2[]>\n  sampleWeights: IUniform<number[]>\n  size: IUniform<Vector2>\n  tDepth: IUniform<Texture | null>\n  tDiffuse: IUniform<Texture | null>\n}\n\nexport interface IDepthLimitedBlurShader\n  extends IShader<DepthLimitedBlurShaderUniforms, DepthLimitedBlurShaderDefines> {\n  defines: DepthLimitedBlurShaderDefines\n  needsUpdate?: boolean\n}\n\nexport const DepthLimitedBlurShader: IDepthLimitedBlurShader = {\n  defines: {\n    KERNEL_RADIUS: 4,\n    DEPTH_PACKING: 1,\n    PERSPECTIVE_CAMERA: 1,\n  },\n  uniforms: {\n    tDiffuse: { value: null },\n    size: { value: /* @__PURE__ */ new Vector2(512, 512) },\n    sampleUvOffsets: { value: [/* @__PURE__ */ new Vector2(0, 0)] },\n    sampleWeights: { value: [1.0] },\n    tDepth: { value: null },\n    cameraNear: { value: 10 },\n    cameraFar: { value: 1000 },\n    depthCutoff: { value: 10 },\n  },\n  vertexShader: /* glsl */ `\n    #include <common>\n\n    uniform vec2 size;\n\n    varying vec2 vUv;\n    varying vec2 vInvSize;\n\n    void main() {\n    \tvUv = uv;\n    \tvInvSize = 1.0 / size;\n\n    \tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n    }\n  `,\n  fragmentShader: /* glsl */ `\n    #include <common>\n    #include <packing>\n\n    uniform sampler2D tDiffuse;\n    uniform sampler2D tDepth;\n\n    uniform float cameraNear;\n    uniform float cameraFar;\n    uniform float depthCutoff;\n\n    uniform vec2 sampleUvOffsets[ KERNEL_RADIUS + 1 ];\n    uniform float sampleWeights[ KERNEL_RADIUS + 1 ];\n\n    varying vec2 vUv;\n    varying vec2 vInvSize;\n\n    float getDepth( const in vec2 screenPosition ) {\n    \t#if DEPTH_PACKING == 1\n    \treturn unpackRGBAToDepth( texture2D( tDepth, screenPosition ) );\n    \t#else\n    \treturn texture2D( tDepth, screenPosition ).x;\n    \t#endif\n    }\n\n    float getViewZ( const in float depth ) {\n    \t#if PERSPECTIVE_CAMERA == 1\n    \treturn perspectiveDepthToViewZ( depth, cameraNear, cameraFar );\n    \t#else\n    \treturn orthographicDepthToViewZ( depth, cameraNear, cameraFar );\n    \t#endif\n    }\n\n    void main() {\n    \tfloat depth = getDepth( vUv );\n    \tif( depth >= ( 1.0 - EPSILON ) ) {\n    \t\tdiscard;\n    \t}\n\n    \tfloat centerViewZ = -getViewZ( depth );\n    \tbool rBreak = false, lBreak = false;\n\n    \tfloat weightSum = sampleWeights[0];\n    \tvec4 diffuseSum = texture2D( tDiffuse, vUv ) * weightSum;\n\n    \tfor( int i = 1; i <= KERNEL_RADIUS; i ++ ) {\n\n    \t\tfloat sampleWeight = sampleWeights[i];\n    \t\tvec2 sampleUvOffset = sampleUvOffsets[i] * vInvSize;\n\n    \t\tvec2 sampleUv = vUv + sampleUvOffset;\n    \t\tfloat viewZ = -getViewZ( getDepth( sampleUv ) );\n\n    \t\tif( abs( viewZ - centerViewZ ) > depthCutoff ) rBreak = true;\n\n    \t\tif( ! rBreak ) {\n    \t\t\tdiffuseSum += texture2D( tDiffuse, sampleUv ) * sampleWeight;\n    \t\t\tweightSum += sampleWeight;\n    \t\t}\n\n    \t\tsampleUv = vUv - sampleUvOffset;\n    \t\tviewZ = -getViewZ( getDepth( sampleUv ) );\n\n    \t\tif( abs( viewZ - centerViewZ ) > depthCutoff ) lBreak = true;\n\n    \t\tif( ! lBreak ) {\n    \t\t\tdiffuseSum += texture2D( tDiffuse, sampleUv ) * sampleWeight;\n    \t\t\tweightSum += sampleWeight;\n    \t\t}\n\n    \t}\n\n    \tgl_FragColor = diffuseSum / weightSum;\n    }\n  `,\n}\n\nexport const BlurShaderUtils = {\n  createSampleWeights: (kernelRadius: number, stdDev: number): number[] => {\n    const gaussian = (x: number, stdDev: number): number => {\n      return Math.exp(-(x * x) / (2.0 * (stdDev * stdDev))) / (Math.sqrt(2.0 * Math.PI) * stdDev)\n    }\n\n    const weights: number[] = []\n\n    for (let i = 0; i <= kernelRadius; i++) {\n      weights.push(gaussian(i, stdDev))\n    }\n\n    return weights\n  },\n\n  createSampleOffsets: (kernelRadius: number, uvIncrement: Vector2): Vector2[] => {\n    const offsets: Vector2[] = []\n\n    for (let i = 0; i <= kernelRadius; i++) {\n      offsets.push(uvIncrement.clone().multiplyScalar(i))\n    }\n\n    return offsets\n  },\n\n  configure: (shader: IDepthLimitedBlurShader, kernelRadius: number, stdDev: number, uvIncrement: Vector2): void => {\n    shader.defines['KERNEL_RADIUS'] = kernelRadius\n    shader.uniforms['sampleUvOffsets'].value = BlurShaderUtils.createSampleOffsets(kernelRadius, uvIncrement)\n    shader.uniforms['sampleWeights'].value = BlurShaderUtils.createSampleWeights(kernelRadius, stdDev)\n    shader.needsUpdate = true\n  },\n}\n"],"names":["Vector2","stdDev"],"mappings":";;;AA2BO,MAAM,yBAAkD;AAAA,EAC7D,SAAS;AAAA,IACP,eAAe;AAAA,IACf,eAAe;AAAA,IACf,oBAAoB;AAAA,EACtB;AAAA,EACA,UAAU;AAAA,IACR,UAAU,EAAE,OAAO,KAAK;AAAA,IACxB,MAAM,EAAE,2BAA2BA,MAAQ,QAAA,KAAK,GAAG,EAAE;AAAA,IACrD,iBAAiB,EAAE,OAAO,qBAAqBA,MAAQ,QAAA,GAAG,CAAC,CAAC,EAAE;AAAA,IAC9D,eAAe,EAAE,OAAO,CAAC,CAAG,EAAE;AAAA,IAC9B,QAAQ,EAAE,OAAO,KAAK;AAAA,IACtB,YAAY,EAAE,OAAO,GAAG;AAAA,IACxB,WAAW,EAAE,OAAO,IAAK;AAAA,IACzB,aAAa,EAAE,OAAO,GAAG;AAAA,EAC3B;AAAA,EACA;AAAA;AAAA,IAAyB;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EAezB;AAAA;AAAA,IAA2B;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AA2E7B;AAEO,MAAM,kBAAkB;AAAA,EAC7B,qBAAqB,CAAC,cAAsB,WAA6B;AACjE,UAAA,WAAW,CAAC,GAAWC,YAA2B;AACtD,aAAO,KAAK,IAAI,EAAE,IAAI,MAAM,KAAOA,UAASA,SAAQ,KAAK,KAAK,KAAK,IAAM,KAAK,EAAE,IAAIA;AAAAA,IAAA;AAGtF,UAAM,UAAoB,CAAA;AAE1B,aAAS,IAAI,GAAG,KAAK,cAAc,KAAK;AACtC,cAAQ,KAAK,SAAS,GAAG,MAAM,CAAC;AAAA,IAClC;AAEO,WAAA;AAAA,EACT;AAAA,EAEA,qBAAqB,CAAC,cAAsB,gBAAoC;AAC9E,UAAM,UAAqB,CAAA;AAE3B,aAAS,IAAI,GAAG,KAAK,cAAc,KAAK;AACtC,cAAQ,KAAK,YAAY,MAAQ,EAAA,eAAe,CAAC,CAAC;AAAA,IACpD;AAEO,WAAA;AAAA,EACT;AAAA,EAEA,WAAW,CAAC,QAAiC,cAAsB,QAAgB,gBAA+B;AACzG,WAAA,QAAQ,eAAe,IAAI;AAClC,WAAO,SAAS,iBAAiB,EAAE,QAAQ,gBAAgB,oBAAoB,cAAc,WAAW;AACxG,WAAO,SAAS,eAAe,EAAE,QAAQ,gBAAgB,oBAAoB,cAAc,MAAM;AACjG,WAAO,cAAc;AAAA,EACvB;AACF;;;"}