three-stdlib/shaders/SSAOShader.cjs.map

stand-alone library of threejs examples

{"version":3,"file":"SSAOShader.cjs","sources":["../../src/shaders/SSAOShader.ts"],"sourcesContent":["import { Matrix4, Vector2 } from 'three'\n\n/**\n * References:\n * http://john-chapman-graphics.blogspot.com/2013/01/ssao-tutorial.html\n * https://learnopengl.com/Advanced-Lighting/SSAO\n * https://github.com/McNopper/OpenGL/blob/master/Example28/shader/ssao.frag.glsl\n */\n\nexport const SSAOShader = {\n  defines: {\n    PERSPECTIVE_CAMERA: 1,\n    KERNEL_SIZE: 32,\n  },\n\n  uniforms: {\n    tDiffuse: { value: null },\n    tNormal: { value: null },\n    tDepth: { value: null },\n    tNoise: { value: null },\n    kernel: { value: null },\n    cameraNear: { value: null },\n    cameraFar: { value: null },\n    resolution: { value: new Vector2() },\n    cameraProjectionMatrix: { value: new Matrix4() },\n    cameraInverseProjectionMatrix: { value: new Matrix4() },\n    kernelRadius: { value: 8 },\n    minDistance: { value: 0.005 },\n    maxDistance: { value: 0.05 },\n  },\n\n  vertexShader: [\n    'varying vec2 vUv;',\n\n    'void main() {',\n\n    '\tvUv = uv;',\n\n    '\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',\n\n    '}',\n  ].join('\\n'),\n\n  fragmentShader: [\n    'uniform sampler2D tDiffuse;',\n    'uniform sampler2D tNormal;',\n    'uniform sampler2D tDepth;',\n    'uniform sampler2D tNoise;',\n\n    'uniform vec3 kernel[ KERNEL_SIZE ];',\n\n    'uniform vec2 resolution;',\n\n    'uniform float cameraNear;',\n    'uniform float cameraFar;',\n    'uniform mat4 cameraProjectionMatrix;',\n    'uniform mat4 cameraInverseProjectionMatrix;',\n\n    'uniform float kernelRadius;',\n    'uniform float minDistance;', // avoid artifacts caused by neighbour fragments with minimal depth difference\n    'uniform float maxDistance;', // avoid the influence of fragments which are too far away\n\n    'varying vec2 vUv;',\n\n    '#include <packing>',\n\n    'float getDepth( const in vec2 screenPosition ) {',\n\n    '\treturn texture2D( tDepth, screenPosition ).x;',\n\n    '}',\n\n    'float getLinearDepth( const in vec2 screenPosition ) {',\n\n    '\t#if PERSPECTIVE_CAMERA == 1',\n\n    '\t\tfloat fragCoordZ = texture2D( tDepth, screenPosition ).x;',\n    '\t\tfloat viewZ = perspectiveDepthToViewZ( fragCoordZ, cameraNear, cameraFar );',\n    '\t\treturn viewZToOrthographicDepth( viewZ, cameraNear, cameraFar );',\n\n    '\t#else',\n\n    '\t\treturn texture2D( tDepth, screenPosition ).x;',\n\n    '\t#endif',\n\n    '}',\n\n    'float getViewZ( const in float depth ) {',\n\n    '\t#if PERSPECTIVE_CAMERA == 1',\n\n    '\t\treturn perspectiveDepthToViewZ( depth, cameraNear, cameraFar );',\n\n    '\t#else',\n\n    '\t\treturn orthographicDepthToViewZ( depth, cameraNear, cameraFar );',\n\n    '\t#endif',\n\n    '}',\n\n    'vec3 getViewPosition( const in vec2 screenPosition, const in float depth, const in float viewZ ) {',\n\n    '\tfloat clipW = cameraProjectionMatrix[2][3] * viewZ + cameraProjectionMatrix[3][3];',\n\n    '\tvec4 clipPosition = vec4( ( vec3( screenPosition, depth ) - 0.5 ) * 2.0, 1.0 );',\n\n    '\tclipPosition *= clipW; // unprojection.',\n\n    '\treturn ( cameraInverseProjectionMatrix * clipPosition ).xyz;',\n\n    '}',\n\n    'vec3 getViewNormal( const in vec2 screenPosition ) {',\n\n    '\treturn unpackRGBToNormal( texture2D( tNormal, screenPosition ).xyz );',\n\n    '}',\n\n    'void main() {',\n\n    '\tfloat depth = getDepth( vUv );',\n    '\tfloat viewZ = getViewZ( depth );',\n\n    '\tvec3 viewPosition = getViewPosition( vUv, depth, viewZ );',\n    '\tvec3 viewNormal = getViewNormal( vUv );',\n\n    ' vec2 noiseScale = vec2( resolution.x / 4.0, resolution.y / 4.0 );',\n    '\tvec3 random = texture2D( tNoise, vUv * noiseScale ).xyz;',\n\n    // compute matrix used to reorient a kernel vector\n\n    '\tvec3 tangent = normalize( random - viewNormal * dot( random, viewNormal ) );',\n    '\tvec3 bitangent = cross( viewNormal, tangent );',\n    '\tmat3 kernelMatrix = mat3( tangent, bitangent, viewNormal );',\n\n    ' float occlusion = 0.0;',\n\n    ' for ( int i = 0; i < KERNEL_SIZE; i ++ ) {',\n\n    '\t\tvec3 sampleVector = kernelMatrix * kernel[ i ];', // reorient sample vector in view space\n    '\t\tvec3 samplePoint = viewPosition + ( sampleVector * kernelRadius );', // calculate sample point\n\n    '\t\tvec4 samplePointNDC = cameraProjectionMatrix * vec4( samplePoint, 1.0 );', // project point and calculate NDC\n    '\t\tsamplePointNDC /= samplePointNDC.w;',\n\n    '\t\tvec2 samplePointUv = samplePointNDC.xy * 0.5 + 0.5;', // compute uv coordinates\n\n    '\t\tfloat realDepth = getLinearDepth( samplePointUv );', // get linear depth from depth texture\n    '\t\tfloat sampleDepth = viewZToOrthographicDepth( samplePoint.z, cameraNear, cameraFar );', // compute linear depth of the sample view Z value\n    '\t\tfloat delta = sampleDepth - realDepth;',\n\n    '\t\tif ( delta > minDistance && delta < maxDistance ) {', // if fragment is before sample point, increase occlusion\n\n    '\t\t\tocclusion += 1.0;',\n\n    '\t\t}',\n\n    '\t}',\n\n    '\tocclusion = clamp( occlusion / float( KERNEL_SIZE ), 0.0, 1.0 );',\n\n    '\tgl_FragColor = vec4( vec3( 1.0 - occlusion ), 1.0 );',\n\n    '}',\n  ].join('\\n'),\n}\n\nexport const SSAODepthShader = {\n  defines: {\n    PERSPECTIVE_CAMERA: 1,\n  },\n\n  uniforms: {\n    tDepth: { value: null },\n    cameraNear: { value: null },\n    cameraFar: { value: null },\n  },\n\n  vertexShader: [\n    'varying vec2 vUv;',\n\n    'void main() {',\n\n    '\tvUv = uv;',\n    '\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',\n\n    '}',\n  ].join('\\n'),\n\n  fragmentShader: [\n    'uniform sampler2D tDepth;',\n\n    'uniform float cameraNear;',\n    'uniform float cameraFar;',\n\n    'varying vec2 vUv;',\n\n    '#include <packing>',\n\n    'float getLinearDepth( const in vec2 screenPosition ) {',\n\n    '\t#if PERSPECTIVE_CAMERA == 1',\n\n    '\t\tfloat fragCoordZ = texture2D( tDepth, screenPosition ).x;',\n    '\t\tfloat viewZ = perspectiveDepthToViewZ( fragCoordZ, cameraNear, cameraFar );',\n    '\t\treturn viewZToOrthographicDepth( viewZ, cameraNear, cameraFar );',\n\n    '\t#else',\n\n    '\t\treturn texture2D( tDepth, screenPosition ).x;',\n\n    '\t#endif',\n\n    '}',\n\n    'void main() {',\n\n    '\tfloat depth = getLinearDepth( vUv );',\n    '\tgl_FragColor = vec4( vec3( 1.0 - depth ), 1.0 );',\n\n    '}',\n  ].join('\\n'),\n}\n\nexport const SSAOBlurShader = {\n  uniforms: {\n    tDiffuse: { value: null },\n    resolution: { value: new Vector2() },\n  },\n\n  vertexShader: [\n    'varying vec2 vUv;',\n\n    'void main() {',\n\n    '\tvUv = uv;',\n    '\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',\n\n    '}',\n  ].join('\\n'),\n\n  fragmentShader: [\n    'uniform sampler2D tDiffuse;',\n\n    'uniform vec2 resolution;',\n\n    'varying vec2 vUv;',\n\n    'void main() {',\n\n    '\tvec2 texelSize = ( 1.0 / resolution );',\n    '\tfloat result = 0.0;',\n\n    '\tfor ( int i = - 2; i <= 2; i ++ ) {',\n\n    '\t\tfor ( int j = - 2; j <= 2; j ++ ) {',\n\n    '\t\t\tvec2 offset = ( vec2( float( i ), float( j ) ) ) * texelSize;',\n    '\t\t\tresult += texture2D( tDiffuse, vUv + offset ).r;',\n\n    '\t\t}',\n\n    '\t}',\n\n    '\tgl_FragColor = vec4( vec3( result / ( 5.0 * 5.0 ) ), 1.0 );',\n\n    '}',\n  ].join('\\n'),\n}\n"],"names":["Vector2","Matrix4"],"mappings":";;;AASO,MAAM,aAAa;AAAA,EACxB,SAAS;AAAA,IACP,oBAAoB;AAAA,IACpB,aAAa;AAAA,EACf;AAAA,EAEA,UAAU;AAAA,IACR,UAAU,EAAE,OAAO,KAAK;AAAA,IACxB,SAAS,EAAE,OAAO,KAAK;AAAA,IACvB,QAAQ,EAAE,OAAO,KAAK;AAAA,IACtB,QAAQ,EAAE,OAAO,KAAK;AAAA,IACtB,QAAQ,EAAE,OAAO,KAAK;AAAA,IACtB,YAAY,EAAE,OAAO,KAAK;AAAA,IAC1B,WAAW,EAAE,OAAO,KAAK;AAAA,IACzB,YAAY,EAAE,OAAO,IAAIA,MAAAA,UAAU;AAAA,IACnC,wBAAwB,EAAE,OAAO,IAAIC,MAAAA,UAAU;AAAA,IAC/C,+BAA+B,EAAE,OAAO,IAAIA,MAAAA,UAAU;AAAA,IACtD,cAAc,EAAE,OAAO,EAAE;AAAA,IACzB,aAAa,EAAE,OAAO,KAAM;AAAA,IAC5B,aAAa,EAAE,OAAO,KAAK;AAAA,EAC7B;AAAA,EAEA,cAAc;AAAA,IACZ;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,EAAA,EACA,KAAK,IAAI;AAAA,EAEX,gBAAgB;AAAA,IACd;AAAA,IACA;AAAA,IACA;AAAA,IACA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IACA;AAAA,IACA;AAAA,IACA;AAAA,IAEA;AAAA,IACA;AAAA;AAAA,IACA;AAAA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IACA;AAAA,IACA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IACA;AAAA,IAEA;AAAA,IACA;AAAA,IAEA;AAAA,IACA;AAAA;AAAA,IAIA;AAAA,IACA;AAAA,IACA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA;AAAA,IACA;AAAA;AAAA,IAEA;AAAA;AAAA,IACA;AAAA,IAEA;AAAA;AAAA,IAEA;AAAA;AAAA,IACA;AAAA;AAAA,IACA;AAAA,IAEA;AAAA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,EAAA,EACA,KAAK,IAAI;AACb;AAEO,MAAM,kBAAkB;AAAA,EAC7B,SAAS;AAAA,IACP,oBAAoB;AAAA,EACtB;AAAA,EAEA,UAAU;AAAA,IACR,QAAQ,EAAE,OAAO,KAAK;AAAA,IACtB,YAAY,EAAE,OAAO,KAAK;AAAA,IAC1B,WAAW,EAAE,OAAO,KAAK;AAAA,EAC3B;AAAA,EAEA,cAAc;AAAA,IACZ;AAAA,IAEA;AAAA,IAEA;AAAA,IACA;AAAA,IAEA;AAAA,EAAA,EACA,KAAK,IAAI;AAAA,EAEX,gBAAgB;AAAA,IACd;AAAA,IAEA;AAAA,IACA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IACA;AAAA,IACA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IACA;AAAA,IAEA;AAAA,EAAA,EACA,KAAK,IAAI;AACb;AAEO,MAAM,iBAAiB;AAAA,EAC5B,UAAU;AAAA,IACR,UAAU,EAAE,OAAO,KAAK;AAAA,IACxB,YAAY,EAAE,OAAO,IAAID,MAAAA,UAAU;AAAA,EACrC;AAAA,EAEA,cAAc;AAAA,IACZ;AAAA,IAEA;AAAA,IAEA;AAAA,IACA;AAAA,IAEA;AAAA,EAAA,EACA,KAAK,IAAI;AAAA,EAEX,gBAAgB;AAAA,IACd;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IACA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IACA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,IAEA;AAAA,EAAA,EACA,KAAK,IAAI;AACb;;;;"}