cocos-creator-template/assets/effects/util/dcc/imported-metallic-roughness.effect

// Copyright (c) 2017-2022 Xiamen Yaji Software Co., Ltd.

CCEffect %{
  techniques:
  - name: opaque
    passes:
    - vert: standard-vs
      frag: standard-fs
      properties: &props
        tilingOffset:         { value: [1.0, 1.0, 0.0, 0.0] }
        mainColor:            { value: [1.0, 1.0, 1.0, 1.0], target: albedo, linear: true, editor: { displayName: BaseColor, type: color } }
        mainTexture:          { value: grey, target: albedoMap, editor: { displayName: BaseColorMap } }
        baseWeightMap:        { value: grey }
        albedoScale:          { value: 1.0, editor: { displayName: BaseWeight } }
        roughness:            { value: 1.0, editor: { slide: true, range: [0, 1.0], step: 0.001 } }
        roughnessMap:         { value: grey }
        metallic:             { value: 1.0, editor: { slide: true, range: [0, 1.0], step: 0.001 } }
        metallicMap:          { value: grey }
        occlusion:            { value: 0.0, editor: { slide: true, range: [0, 1.0], step: 0.001 } }
        occlusionMap:         { value: white }
        specularIntensity:    { value: 0.5, editor: { slide: true, range: [0, 1.0], step: 0.001 } }
        emissiveScale:        { value: 1.0 }
        emissiveScaleMap:     { value: grey }
        emissive:             { value: [0.0, 0.0, 0.0, 1.0], linear: true, editor: { displayName: EmissiveColor, type: color} }
        emissiveMap:          { value: grey, editor: { displayName: EmissiveColorMap } }
        alphaSource:          { value: 1.0, editor: { slide: true, range: [0, 1.0], step: 0.001 } }
        alphaSourceMap:       { value: grey, editor: { parent: USE_OPACITY_MAP } }
        alphaThreshold:       { value: 0.5, editor: { parent: USE_ALPHA_TEST, slide: true, range: [0, 1.0], step: 0.001 } }
        normalStrength:       { value: 1.0, editor: { parent: USE_NORMAL_MAP, slide: true, range: [0, 1.0], step: 0.001 } }
        normalMap:            { value: normal }
    - &forward-add
      vert: standard-vs
      frag: standard-fs
      phase: forward-add
      propertyIndex: 0
      embeddedMacros: { CC_FORWARD_ADD: true }
      depthStencilState:
        depthFunc: equal
        depthTest: true
        depthWrite: false
      blendState:
        targets:
        - blend: true
          blendSrc: one
          blendDst: one
          blendSrcAlpha: zero
          blendDstAlpha: one
    - &shadow-caster
      vert: shadow-caster-vs
      frag: shadow-caster-fs
      phase: shadow-caster
      propertyIndex: 0
      rasterizerState:
        cullMode: front
      properties:
        tilingOffset:   { value: [1.0, 1.0, 0.0, 0.0] }
        mainColor:      { value: [1.0, 1.0, 1.0, 1.0], target: albedo, editor: { displayName: Albedo, type: color } }
        albedoScale:    { value: 1.0, editor: { displayName: BaseWeight } }
        alphaThreshold: { value: 0.5, editor: { parent: USE_ALPHA_TEST } }
        mainTexture:    { value: grey, target: albedoMap, editor: { displayName: AlbedoMap } }
        alphaSource:    { value: 1.0, editor: { slide: true, range: [0, 1.0], step: 0.001 } }
        alphaSourceMap: { value: grey, editor: { parent: USE_OPACITY_MAP } }
    - &deferred-forward
      vert: standard-vs
      frag: standard-fs
      propertyIndex: 0
      phase: deferred-forward
  - name: transparent
    passes:
    - vert: standard-vs
      frag: standard-fs
      embeddedMacros: { CC_FORCE_FORWARD_SHADING: true }
      depthStencilState: &d1
        depthTest: true
        depthWrite: false
      blendState: &b1
        targets:
        - blend: true
          blendSrc: src_alpha
          blendDst: one_minus_src_alpha
          blendDstAlpha: one_minus_src_alpha
      properties: *props
    - *forward-add
    - *shadow-caster
    - &deferred-forward
      vert: standard-vs
      frag: standard-fs
      phase: deferred-forward
      embeddedMacros: { CC_PIPELINE_TYPE: 0 }
      depthStencilState: *d1
      blendState: *b1
      propertyIndex: 0
}%

CCProgram shared-ubos %{
  uniform Constants {
    vec4 tilingOffset;
    vec4 albedo;
    vec4 emissive;
    float emissiveScale;
    float occlusion;
    float roughness;
    float metallic;
    float normalStrength;
    float alphaSource;
    float albedoScale;
    float alphaThreshold;
    float specularIntensity;
  };
}%

CCProgram macro-remapping %{
  // ui displayed macros
  #pragma define-meta HAS_SECOND_UV
  #pragma define-meta USE_TWOSIDE
  #pragma define-meta USE_REFLECTION_DENOISE
  #pragma define-meta IS_ANISOTROPY
  #pragma define-meta USE_VERTEX_COLOR

  #define CC_SURFACES_USE_SECOND_UV HAS_SECOND_UV
  #define CC_SURFACES_USE_TWO_SIDED USE_TWOSIDE
  #define CC_SURFACES_USE_REFLECTION_DENOISE USE_REFLECTION_DENOISE
  #define CC_SURFACES_LIGHTING_ANISOTROPIC IS_ANISOTROPY
  #define CC_SURFACES_USE_VERTEX_COLOR USE_VERTEX_COLOR

  // if disabled, simulate convoluted IBL without convolution
  #pragma define-meta USE_COMPATIBLE_LIGHTING
  #define CC_SURFACES_USE_LEGACY_COMPATIBLE_LIGHTING USE_COMPATIBLE_LIGHTING

  // depend on UI macros
#if IS_ANISOTROPY || USE_NORMAL_MAP
  #define CC_SURFACES_USE_TANGENT_SPACE 1
#endif

  // functionality for each effect
  #define CC_SURFACES_LIGHTING_ANISOTROPIC_ENVCONVOLUTION_COUNT 31
}%

CCProgram surface-vertex %{
  #define CC_SURFACES_VERTEX_MODIFY_UV
  void SurfacesVertexModifyUV(inout SurfacesStandardVertexIntermediate In)
  {
    In.texCoord = In.texCoord * tilingOffset.xy + tilingOffset.zw;
  #if CC_SURFACES_USE_SECOND_UV
    In.texCoord1 = In.texCoord1 * tilingOffset.xy + tilingOffset.zw;
  #endif
  }
}%

CCProgram surface-fragment %{
  #pragma define-meta TEXTURE_UV options([v_uv, v_uv1])
  #if USE_ALBEDO_MAP
    uniform sampler2D albedoMap;
  #endif

  #if USE_WEIGHT_MAP
    uniform sampler2D baseWeightMap;
  #endif

  #if USE_METALLIC_MAP
    #pragma define-meta METALLIC_CHANNEL options([r, g, b, a])
    uniform sampler2D metallicMap;
  #endif

  #if USE_ROUGHNESS_MAP
    #pragma define-meta ROUGHNESS_CHANNEL options([r, g, b, a])
    uniform sampler2D roughnessMap;
  #endif

  #if USE_OCCLUSION_MAP
    #pragma define-meta OCCLUSION_CHANNEL options([r, g, b, a])
    uniform sampler2D occlusionMap;
  #endif

  #if USE_TRANSPARENCY_MAP
    uniform sampler2D transparencyMap;
  #endif

  #if USE_TRANSPARENCYCOLOR_MAP
    uniform sampler2D transparencyColorMap;
  #endif

  #if USE_EMISSIVE_MAP
    uniform sampler2D emissiveMap;
  #endif
  #if USE_EMISSIVESCALE_MAP
    uniform sampler2D emissiveScaleMap;
  #endif

  #if USE_OPACITY_MAP
    #pragma define-meta ALPHA_SOURCE_CHANNEL options([r, g, b, a])
    uniform sampler2D alphaSourceMap;
  #endif

  #if USE_NORMAL_MAP
    uniform sampler2D normalMap;
    #pragma define-meta NORMAL_UV options([v_uv, v_uv1])
  #endif

  float discolor(vec3 srcColor) {
    return dot(GRAY_VECTOR, srcColor);
  }

  #define CC_SURFACES_FRAGMENT_MODIFY_BASECOLOR_AND_TRANSPARENCY
  vec4 SurfacesFragmentModifyBaseColorAndTransparency()
  {
    vec4 baseColor = albedo;
    #if USE_VERTEX_COLOR
      baseColor.rgb *= SRGBToLinear(FSInput_vertexColor.rgb); // use linear
      baseColor.a *= FSInput_vertexColor.a;
    #endif

    #if USE_ALBEDO_MAP
      vec4 texColor = texture(albedoMap, TEXTURE_UV);
      texColor.rgb = SRGBToLinear(texColor.rgb);
      baseColor = texColor;
    #endif

    #if USE_WEIGHT_MAP
        vec4 weightColor = texture(baseWeightMap, TEXTURE_UV);
        weightColor.rgb = SRGBToLinear(weightColor.rgb);
        baseColor.rgb *= weightColor.rgb;
    #else
        baseColor.rgb *= albedoScale;
    #endif
    #if ALPHA_SOURCE_IS_OPACITY
      #if USE_OPACITY_MAP
        baseColor.a = 1.0 - texture(alphaSourceMap, TEXTURE_UV).ALPHA_SOURCE_CHANNEL;
      #else
        baseColor.a = 1.0 - alphaSource;
      #endif
    #else
      #if USE_OPACITY_MAP
        baseColor.a = texture(alphaSourceMap, TEXTURE_UV).ALPHA_SOURCE_CHANNEL;
      #else
        baseColor.a = alphaSource;
      #endif
    #endif
    #if USE_ALPHA_TEST
      if (baseColor.a < alphaThreshold) discard;
    #endif
    return baseColor;
  }

  #define CC_SURFACES_FRAGMENT_ALPHA_CLIP_ONLY
  void SurfacesFragmentAlphaClipOnly()
  {
      #if USE_ALPHA_TEST
        float alpha = albedo.a;
        #if USE_ALBEDO_MAP
          alpha = texture(albedoMap, TEXTURE_UV).a;
        #endif

        #if ALPHA_SOURCE_IS_OPACITY
          #if USE_OPACITY_MAP
            alpha = 1.0 - texture(alphaSourceMap, TEXTURE_UV).ALPHA_SOURCE_CHANNEL;
          #else
            alpha = 1.0 - alphaSource;
          #endif
        #else
          #if USE_OPACITY_MAP
            alpha = texture(alphaSourceMap, TEXTURE_UV).ALPHA_SOURCE_CHANNEL;
          #else
            alpha = alphaSource;
          #endif
        #endif

        if (alpha < alphaThreshold) discard;
      #endif
  }

  #define CC_SURFACES_FRAGMENT_MODIFY_WORLD_NORMAL
  vec3 SurfacesFragmentModifyWorldNormal()
  {
    vec3 normal = FSInput_worldNormal;
    #if USE_NORMAL_MAP
      vec3 nmmp = texture(normalMap, NORMAL_UV).xyz - vec3(0.5);
      normal = CalculateNormalFromTangentSpace(nmmp, normalStrength, normalize(normal.xyz), normalize(FSInput_worldTangent), FSInput_mirrorNormal);
    #endif

    return normalize(normal);
  }

  #define CC_SURFACES_FRAGMENT_MODIFY_EMISSIVE
  vec3 SurfacesFragmentModifyEmissive()
  {
    //emissive color
    vec3 emissiveColor = emissive.rgb;
    #if USE_EMISSIVE_MAP
        emissiveColor.rgb = SRGBToLinear(texture(emissiveMap, TEXTURE_UV).rgb);
    #endif
    //emissive color scale
    #if USE_EMISSIVESCALE_MAP
        vec4 emissiveScaleColor = texture(emissiveScaleMap, TEXTURE_UV);
        emissiveScaleColor.rgb = SRGBToLinear(emissiveScaleColor.rgb);
        emissiveColor.rgb *= emissiveScaleColor.rgb;
    #else
        emissiveColor.rgb *= emissiveScale;
    #endif

    return emissiveColor.rgb;
  }

  #define CC_SURFACES_FRAGMENT_MODIFY_PBRPARAMS
  vec4 SurfacesFragmentModifyPBRParams()
  {
    vec4 pbr = vec4(1.0,1.0,1.0,1.0);
    //ao
    float occlusionValue = 1.0;
    #if USE_OCCLUSION_MAP
       vec4 occlusionColor = texture(occlusionMap, TEXTURE_UV);
       float occlusionColorValue = discolor(occlusionColor.rgb);
       #if USE_OCCLUSION_CHANNEL
           occlusionColor.rgb = SRGBToLinear(occlusionColor.rgb);
           occlusionColorValue = occlusionColor.OCCLUSION_CHANNEL;
       #endif
       occlusionValue = mix(1.0, occlusionColorValue, occlusion);
    #endif
    pbr.x = occlusionValue;

    //roughness
    float roughnessValue = roughness;
    #if USE_ROUGHNESS_MAP
       vec4 roughnessColor = texture(roughnessMap, TEXTURE_UV);
       roughnessValue = discolor(roughnessColor.rgb);
       #if USE_ROUGHNESS_CHANNEL
           roughnessColor.rgb = SRGBToLinear(roughnessColor.rgb);
           roughnessValue = roughnessColor.ROUGHNESS_CHANNEL;
       #endif
    #endif
    //fit specular ior=1.5
    pbr.y = max(0.02, roughnessValue);

    //metallic
    float metallicValue = metallic;
    #if USE_METALLIC_MAP
       vec4 metallicColor = texture(metallicMap, TEXTURE_UV);
       metallicValue = discolor(metallicColor.rgb);
       #if USE_METALLIC_CHANNEL
           metallicColor.rgb = SRGBToLinear(metallicColor.rgb);
           metallicValue = metallicColor.METALLIC_CHANNEL;
       #endif
    #endif
    pbr.z = metallicValue;

    //specularIntensity
    pbr.w = specularIntensity;
    return pbr;
  }
}%

CCProgram standard-vs %{
  precision highp float;

  // 1. surface internal macros, for technique usage or remapping some user (material) macros to surface internal macros
  #include <macro-remapping>
  #include <surfaces/effect-macros/common-macros>

  // 2. common include with corresponding shader stage, include before surface functions
  #include <surfaces/includes/common-vs>

  // 3. user surface functions that can use user (effect) parameters (ubo Constants)
  //    see surfaces/default-functions/xxx.chunk
  #include <shared-ubos>
  #include <surface-vertex>

  // 4. surface include with corresponding shader stage and shading-model (optional)
  #include <surfaces/includes/standard-vs>

  // 5. shader entry with corresponding shader stage and technique usage/type
  #include <shading-entries/main-functions/render-to-scene/vs>
}%


CCProgram shadow-caster-vs %{
  precision highp float;
  #include <macro-remapping>
  #include <surfaces/effect-macros/render-to-shadowmap>
  #include <surfaces/includes/common-vs>
  #include <shared-ubos>
  #include <surface-vertex>
  #include <shading-entries/main-functions/render-to-shadowmap/vs>
}%



CCProgram standard-fs %{
  // shading-model : standard
  // lighting-model : standard (isotropy / anisotropy pbr)
  // shader stage : fs
  // technique usage/type : render-to-scene

  precision highp float;
  // 1. surface internal macros, for technique usage or remapping some user (material) macros to surface internal macros
  #include <macro-remapping>
  #include <surfaces/effect-macros/common-macros>

  // 2. common include with corresponding shader stage, include before surface functions
  #include <surfaces/includes/common-fs>

  // 3. user surface functions that can use user (effect) parameters (ubo Constants)
  //    see surfaces/default-functions/xxx.chunk
  #include <shared-ubos>
  #include <surface-fragment>

  // 4. lighting-model (optional)
  #include <lighting-models/includes/standard>

  // 5. surface include with corresponding shader stage and shading-model (optional)
  #include <surfaces/includes/standard-fs>

  // 6. shader entry with corresponding shader stage and technique usage/type
  #include <shading-entries/main-functions/render-to-scene/fs>
}%

CCProgram shadow-caster-fs %{
  precision highp float;
  #include <macro-remapping>
  #include <surfaces/effect-macros/render-to-shadowmap>
  #include <surfaces/includes/common-fs>
  #include <shared-ubos>
  #include <surface-fragment>
  #include <shading-entries/main-functions/render-to-shadowmap/fs>
}%