three-stdlib/shaders/BokehShader.js

stand-alone library of threejs examples

const BokehShader = {
  defines: {
    DEPTH_PACKING: 1,
    PERSPECTIVE_CAMERA: 1
  },
  uniforms: {
    tColor: { value: null },
    tDepth: { value: null },
    focus: { value: 1 },
    aspect: { value: 1 },
    aperture: { value: 0.025 },
    maxblur: { value: 0.01 },
    nearClip: { value: 1 },
    farClip: { value: 1e3 }
  },
  vertexShader: [
    "varying vec2 vUv;",
    "void main() {",
    "	vUv = uv;",
    "	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
    "}"
  ].join("\n"),
  fragmentShader: [
    "#include <common>",
    "varying vec2 vUv;",
    "uniform sampler2D tColor;",
    "uniform sampler2D tDepth;",
    "uniform float maxblur;",
    // max blur amount
    "uniform float aperture;",
    // aperture - bigger values for shallower depth of field
    "uniform float nearClip;",
    "uniform float farClip;",
    "uniform float focus;",
    "uniform float aspect;",
    "#include <packing>",
    "float getDepth( const in vec2 screenPosition ) {",
    "	#if DEPTH_PACKING == 1",
    "	return unpackRGBAToDepth( texture2D( tDepth, screenPosition ) );",
    "	#else",
    "	return texture2D( tDepth, screenPosition ).x;",
    "	#endif",
    "}",
    "float getViewZ( const in float depth ) {",
    "	#if PERSPECTIVE_CAMERA == 1",
    "	return perspectiveDepthToViewZ( depth, nearClip, farClip );",
    "	#else",
    "	return orthographicDepthToViewZ( depth, nearClip, farClip );",
    "	#endif",
    "}",
    "void main() {",
    "	vec2 aspectcorrect = vec2( 1.0, aspect );",
    "	float viewZ = getViewZ( getDepth( vUv ) );",
    "	float factor = ( focus + viewZ );",
    // viewZ is <= 0, so this is a difference equation
    "	vec2 dofblur = vec2 ( clamp( factor * aperture, -maxblur, maxblur ) );",
    "	vec2 dofblur9 = dofblur * 0.9;",
    "	vec2 dofblur7 = dofblur * 0.7;",
    "	vec2 dofblur4 = dofblur * 0.4;",
    "	vec4 col = vec4( 0.0 );",
    "	col += texture2D( tColor, vUv.xy );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.0,   0.4  ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.15,  0.37 ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.29,  0.29 ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.37,  0.15 ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.40,  0.0  ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.37, -0.15 ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.29, -0.29 ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.15, -0.37 ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.0,  -0.4  ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.15,  0.37 ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.29,  0.29 ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.37,  0.15 ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.4,   0.0  ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.37, -0.15 ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.29, -0.29 ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.15, -0.37 ) * aspectcorrect ) * dofblur );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.15,  0.37 ) * aspectcorrect ) * dofblur9 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.37,  0.15 ) * aspectcorrect ) * dofblur9 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.37, -0.15 ) * aspectcorrect ) * dofblur9 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.15, -0.37 ) * aspectcorrect ) * dofblur9 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.15,  0.37 ) * aspectcorrect ) * dofblur9 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.37,  0.15 ) * aspectcorrect ) * dofblur9 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.37, -0.15 ) * aspectcorrect ) * dofblur9 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.15, -0.37 ) * aspectcorrect ) * dofblur9 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.29,  0.29 ) * aspectcorrect ) * dofblur7 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.40,  0.0  ) * aspectcorrect ) * dofblur7 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.29, -0.29 ) * aspectcorrect ) * dofblur7 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.0,  -0.4  ) * aspectcorrect ) * dofblur7 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.29,  0.29 ) * aspectcorrect ) * dofblur7 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.4,   0.0  ) * aspectcorrect ) * dofblur7 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.29, -0.29 ) * aspectcorrect ) * dofblur7 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.0,   0.4  ) * aspectcorrect ) * dofblur7 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.29,  0.29 ) * aspectcorrect ) * dofblur4 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.4,   0.0  ) * aspectcorrect ) * dofblur4 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.29, -0.29 ) * aspectcorrect ) * dofblur4 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.0,  -0.4  ) * aspectcorrect ) * dofblur4 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.29,  0.29 ) * aspectcorrect ) * dofblur4 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.4,   0.0  ) * aspectcorrect ) * dofblur4 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2( -0.29, -0.29 ) * aspectcorrect ) * dofblur4 );",
    "	col += texture2D( tColor, vUv.xy + ( vec2(  0.0,   0.4  ) * aspectcorrect ) * dofblur4 );",
    "	gl_FragColor = col / 41.0;",
    "	gl_FragColor.a = 1.0;",
    "}"
  ].join("\n")
};
export {
  BokehShader
};
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