simple-skin.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: Albedo, type: color } }
        albedoScale:                      { value: [1.0, 1.0, 1.0], target: albedoScaleAndCutoff.xyz }
        alphaThreshold:                   { value: 0.5, target: albedoScaleAndCutoff.w, editor: { parent: USE_ALPHA_TEST, slide: true, range: [0, 1.0], step: 0.001 } }
        occlusion:                        { value: 0.0, target: pbrParams.x, editor: { slide: true, range: [0, 1.0], step: 0.001 } }
        roughness:                        { value: 0.5, target: pbrParams.y, editor: { slide: true, range: [0, 1.0], step: 0.001 } }
        specularIntensity:                { value: 0.5, target: pbrParams.w, editor: { slide: true, range: [0.0, 1.0], step: 0.001 } }
        normalStrength:                   { value: 1.0, target: emissiveScaleParam.w, editor: { parent: USE_NORMAL_MAP, slide: true, range: [0, 5.0], step: 0.001 } }
        mainTexture:                      { value: grey, target: albedoMap, editor: { displayName: AlbedoMap } }
        normalMap:                        { value: normal }
        pbrMap:                           { value: grey, editor: { displayName: PbrOrRoughnessMap } }
        occlusionMap:                     { value: white }
        sssIntensity:                     { value: 1.0, target: scatterParams.z, editor: { parent: USE_NORMAL_MAP, slide: true, range: [0, 1.0], step: 0.001 } }
        preIntegratedSkinMap:             { value: grey, editor: { parent: USE_PREINTEGRATED_SKIN } }
        sssCurvatureMap:                  { value: white, editor: { parent: USE_PREINTEGRATED_SKIN } }
        sssCurvature:                     { value: 0.1, target: scatterParams.w, editor: { parent: USE_PREINTEGRATED_SKIN, slide: true, range: [0, 1.0], step: 0.001 } }
        sssColoration:                    { value: 1.0, target: dualLobeParams.z, editor: { parent: USE_PREINTEGRATED_SKIN, slide: true, range: [0, 10.0], step: 0.001 } }
        cavityMap:                        { value: white, editor: { tooltip: 'cavity map or specular map' } }
        maskMap:                          { value: black, editor: { parent: USE_BACK_LIT } }
        thickness:                        { value: 0.0, target: scatterParams.x, editor: { parent: USE_BACK_LIT, displayName: Object Thickness, range: [0, 1000.0], tooltip: 'i18n:ENGINE.assets.effect.propertyTips.transmitThicknessWithShadowMap' } }
        extinction:                       { value: 0.0, target: scatterParams.y, editor: { parent: USE_BACK_LIT, displayName: Transmit Scatter Extinction, slide: true, range: [0, 10.0], step: 0.001, tooltip: 'i18n:ENGINE.assets.effect.propertyTips.transmitExtinctionWithShadowMap' } }
        transmitColor:                    { value: [1.0, 0.2, 0.1, 1.0], linear: true, editor: { parent: USE_BACK_LIT, displayName: Transmit Scatter Color, type: color, tooltip: 'The color of scattered lighting, red for human skin' } }
        dualLobeRoughness:                { value: 0.5, target: dualLobeParams.x, editor: { parent: USE_DUAL_LOBE_SPECULAR, range: [0, 1.0] } }
        dualLobeIntensity:                { value: 0.02, target: dualLobeParams.w, editor: { parent: USE_DUAL_LOBE_SPECULAR, slide: true, range: [0, 0.1], step: 0.001 } }
      rasterizerState: &r1
        cullMode: None
      depthStencilState: &d1
        depthFunc: less_equal
        depthTest: true
        depthWrite: true

    - &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: none
      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, 1.0, 1.0], target: albedoScaleAndCutoff.xyz }
        alphaThreshold: { value: 0.5, target: albedoScaleAndCutoff.w, editor: { parent: USE_ALPHA_TEST } }
        mainTexture:    { value: grey, target: albedoMap, editor: { displayName: AlbedoMap } }

    - &deferred-forward
      vert: standard-vs
      frag: standard-fs
      phase: deferred-forward
      propertyIndex: 0
      rasterizerState: *r1
      depthStencilState: *d1

  - name: transparent
    passes:
    - vert: standard-vs
      frag: standard-fs
      embeddedMacros: { CC_FORCE_FORWARD_SHADING: true }
      depthStencilState: &dt
        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-transparent
      vert: standard-vs
      frag: standard-fs
      phase: deferred-forward
      embeddedMacros: { CC_PIPELINE_TYPE: 0 }
      depthStencilState: *dt
      blendState: *b1
      propertyIndex: 0
}%

CCProgram shared-ubos %{
  uniform Constants {
    vec4 tilingOffset;
    vec4 albedo;
    vec4 albedoScaleAndCutoff;
    vec4 pbrParams;
    vec4 emissiveScaleParam;
    vec4 transmitColor;
    vec4 scatterParams;
    vec4 dualLobeParams;
  };
}%

CCProgram macro-remapping %{
  // ui displayed macros
  #pragma define-meta HAS_SECOND_UV
  #pragma define-meta USE_TWOSIDE
  #pragma define-meta USE_VERTEX_COLOR
  #pragma define-meta USE_BACK_LIT
  #pragma define-meta USE_PREINTEGRATED_SKIN
  #pragma define-meta USE_DUAL_LOBE_SPECULAR

  #define CC_SURFACES_USE_SECOND_UV HAS_SECOND_UV
  #define CC_SURFACES_USE_TWO_SIDED USE_TWOSIDE
  #define CC_SURFACES_USE_VERTEX_COLOR USE_VERTEX_COLOR

  #define CC_SURFACES_LIGHTING_DUAL_LOBE_SPECULAR USE_DUAL_LOBE_SPECULAR
  #define CC_SURFACES_LIGHTING_TRANSMIT_DIFFUSE USE_BACK_LIT
  #define CC_SURFACES_LIGHTING_USE_SHADOWMAP_TRANSMIT USE_BACK_LIT
  #define CC_SURFACES_LIGHTING_SSS 1

  // depend on UI macros
#if USE_NORMAL_MAP
  #define CC_SURFACES_USE_TANGENT_SPACE 1
#endif
}%

CCProgram surface-vertex %{
}%

CCProgram surface-fragment %{
  #if USE_ALBEDO_MAP
    uniform sampler2D albedoMap;
    #pragma define-meta ALBEDO_UV options([v_uv, v_uv1])
  #endif
  #if USE_NORMAL_MAP
    uniform sampler2D normalMap;
    #pragma define-meta NORMAL_UV options([v_uv, v_uv1])
  #endif
  #pragma define-meta DEFAULT_UV options([v_uv, v_uv1])
  #if USE_PBR_MAP
    uniform sampler2D pbrMap;
  #endif
  #if USE_OCCLUSION_MAP
    uniform sampler2D occlusionMap;
  #endif

  #pragma define OCCLUSION_CHANNEL          r
  #pragma define ROUGHNESS_CHANNEL          g
  #pragma define METALLIC_CHANNEL           b
  #pragma define SPECULAR_INTENSITY_CHANNEL a

  #if USE_ALPHA_TEST
    #pragma define-meta ALPHA_TEST_CHANNEL options([a, r])
  #endif

  //////////////////User Defines
  #if USE_BACK_LIT
    uniform sampler2D maskMap;
  #endif
  #if USE_PREINTEGRATED_SKIN
    uniform sampler2D sssCurvatureMap;
  #endif
    uniform sampler2D cavityMap;

  #define CC_SURFACES_FRAGMENT_MODIFY_TRANSMIT_SCATTERING_PARAMS
  vec4 SurfacesFragmentModifyTransmitScatteringParams()
  {
    return vec4(scatterParams.y * 50.0, 0.0, 1.0, 0.01);
  }

  #define CC_SURFACES_FRAGMENT_MODIFY_TRANSMIT_DIFFUSE_PARAMS
  vec4 SurfacesFragmentModifyTransmitDiffuseParams()
  {
    float mask = 1.0;
    #if USE_BACK_LIT
      mask = texture(maskMap, FSInput_texcoord).x;
    #endif
    return vec4(scatterParams.x, mask, 1.0, 1.0);
  }

  #define CC_SURFACES_FRAGMENT_MODIFY_TRANSMIT_IN_SCATTERING_COLOR
  vec3 SurfacesFragmentModifyTransmitInScatteringColor()
  {
    return vec3(0.0);//1.0, 0.2, 0.05);
  }

  #define CC_SURFACES_FRAGMENT_MODIFY_TRANSMIT_OUT_SCATTERING_COLOR
  vec3 SurfacesFragmentModifyTransmitOutScatteringColor()
  {
    return transmitColor.rgb;
  }
  #define CC_SURFACES_FRAGMENT_MODIFY_DUAL_LOBE_SPECULAR_PARAMS
  vec4 SurfacesFragmentModifyDualLobeSpecularParams(float roughness)
  {
    return vec4(dualLobeParams.x * roughness, 0.0, 0.0, dualLobeParams.w);
  }

  #define CC_SURFACES_FRAGMENT_MODIFY_SSS_PARAMS
  vec4 SurfacesFragmentModifySSSParams()
  {
    float sssCurvature = scatterParams.w;
    #if USE_PREINTEGRATED_SKIN
      sssCurvature *= texture(sssCurvatureMap, FSInput_texcoord).x;
    #endif
    return vec4(scatterParams.z, sssCurvature, dualLobeParams.z, 0.0);
  }

  #define CC_SURFACES_FRAGMENT_MODIFY_PBRPARAMS
  vec4 SurfacesFragmentModifyPBRParams()
  {
    vec4 pbr = pbrParams;
    pbr.x = 1.0;
    pbr.z = 0.0;
    #if USE_PBR_MAP
      // ao and metallic ignored from pbrMap
      vec4 res = texture(pbrMap, DEFAULT_UV);
      pbr.y *= res.ROUGHNESS_CHANNEL;
      pbr.w *= res.SPECULAR_INTENSITY_CHANNEL;
    #endif
    #if USE_OCCLUSION_MAP
      pbr.x = mix(1.0, texture(occlusionMap, DEFAULT_UV).OCCLUSION_CHANNEL, pbrParams.x);
    #endif

    float cavity = texture(cavityMap, FSInput_texcoord).x;
    pbr.w *= cavity;
    return pbr;
  }

  #include <common-functions>
  #include <lighting-models/default-functions/simple-skin>
}%

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>
}%


CCProgram reflect-map-fs %{
  precision highp float;
  #include <macro-remapping>
  #include <surfaces/effect-macros/common-macros>
  #include <surfaces/includes/common-fs>
  #include <shared-ubos>
  #include <surface-fragment>
  #include <lighting-models/includes/standard>
  #include <surfaces/includes/standard-fs>
  #include <shading-entries/main-functions/render-to-reflectmap/fs>
}%