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

CCEffect %{
  techniques:
  - name: opaque
    passes:
    - vert: standard-vs
      frag: standard-fs
      properties: &props
        mainColor:                        { value: [1.0, 1.0, 1.0, 1.0], target: albedo, linear: true, editor: { displayName: Albedo, type: color } }
        normalStrength:                   { value: 1.0, target: pbrParams.w, editor: { parent: USE_NORMAL_MAP, slide: true, range: [0, 5.0], step: 0.001 } }
        mainTexture:                      { value: grey, target: albedoMap, editor: { displayName: AlbedoMap } }
        roughness:                        { value: 0.5, target: pbrParams.y, editor: { slide: true, range: [0, 1.0], step: 0.001 } }
        fresnelIntensity:                 { value: 1.5, target: pbrParams.z, editor: { slide: true, range: [0, 3.0], step: 0.001 } }
        normalMap:                        { value: normal, editor : { parent: USE_NORMAL_MAP } }
        normalMapDetailed:                { value: normal, editor : { parent: USE_NORMAL_MAP, tooltip: i18n:ENGINE.assets.effect.propertyTips.normalMap } }
        baseTiling:                       { value: 100.0, target: pbrParams.x, editor: { parent: USE_NORMAL_MAP, range: [1.0, 10000.0] } }
        waterSpeed:                       { value: 0.2, target: waterParam.x, editor: { parent: USE_NORMAL_MAP, slide: true, range: [0, 3.0], step: 0.001 } }
        detailedSpeed:                    { value: 0.2, target: waterParam.y, editor: { parent: USE_NORMAL_MAP, slide: true, range: [0, 3.0], step: 0.001 } }
        detailedTiling:                   { value: 0.2, target: waterParam.z, editor: { parent: USE_NORMAL_MAP, slide: true, range: [0, 1.0], step: 0.001 } }
        detailedIntensity:                { value: 0.5, target: waterParam.w, editor: { parent: USE_NORMAL_MAP, slide: true, range: [0, 1.0], step: 0.001 } }
        waterInScatterColor:              { value: [0.07, 0.13, 0.087, 1.0], target: waterColor, linear: true, editor: { parent: USE_WATER_SCATTERING, type: color } }
        waterScatterCoef:                 { value: 3.0, target: waterColor.w, editor: { parent: USE_WATER_SCATTERING, range: [0, 10.0], tooltip: 'The higher the value, the more turbid or deeper the water is.' } }
      rasterizerState: &r1
        cullMode: none
    - &forward-add
      vert: standard-vs
      frag: standard-fs
      phase: forward-add
      propertyIndex: 0
      embeddedMacros: { CC_FORWARD_ADD: true }
      rasterizerState:
        cullMode: none
      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:
        mainColor:      { value: [1.0, 1.0, 1.0, 1.0], target: albedo, editor: { displayName: Albedo, type: color } }
        mainTexture:    { value: grey, target: albedoMap, editor: { displayName: AlbedoMap } }
    - &reflect-map
      vert: standard-vs
      frag: reflect-map-fs
      phase: reflect-map
      propertyIndex: 0
    - &deferred-forward
      vert: standard-vs
      frag: standard-fs
      phase: deferred-forward
      propertyIndex: 0
      rasterizerState: *r1
  - 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-transparent
      vert: standard-vs
      frag: standard-fs
      embeddedMacros: { CC_PIPELINE_TYPE: 0 }
      phase: deferred-forward
      depthStencilState: *d1
      blendState: *b1
      propertyIndex: 0
}%

CCProgram shared-ubos %{
  uniform Constants {
    vec4 albedo;
    vec4 pbrParams;
    vec4 waterParam;
    vec4 waterColor;
  };
}%

CCProgram macro-remapping %{
  // ui displayed macros
  #pragma define-meta HAS_SECOND_UV
  #pragma define-meta USE_TWOSIDE editor({ tooltip: i18n:ENGINE.assets.effect.propertyTips.USE_TWOSIDE })

  #define CC_SURFACES_USE_SECOND_UV HAS_SECOND_UV
  #define CC_SURFACES_USE_TWO_SIDED USE_TWOSIDE
  #define CC_SURFACES_LIGHTING_USE_FRESNEL 1
  #define CC_SURFACES_LIGHTING_TRANSMIT_SPECULAR 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;
    uniform sampler2D normalMapDetailed;
    #pragma define-meta NORMAL_UV options([v_uv, v_uv1])
  #endif
  #pragma define-meta DEFAULT_UV options([v_uv, v_uv1])


  #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, ALBEDO_UV);
      texColor.rgb = SRGBToLinear(texColor.rgb);
      baseColor *= texColor;
    #endif

    return baseColor;
  }

  #define CC_SURFACES_FRAGMENT_ALPHA_CLIP_ONLY
  void SurfacesFragmentAlphaClipOnly()
  {
  }

  #include <common/effect/special-effects>
  vec3 GetDetailedNormal(vec2 texCoord, float tiling, sampler2D normalMap, sampler2D normalMapDetailed, vec3 N, vec3 T)
  {
    float waterSpeed = waterParam.x;
    float detailedSpeed = waterParam.y;
    float detailedTiling = waterParam.z * tiling;
    float detailedIntensity = waterParam.w;
    float normalIntensity = pbrParams.w;

    vec2 uv = texCoord * tiling + vec2(cc_time.w, cc_time.w) * waterSpeed;
    vec3 nmmp = texture(normalMap, uv).xyz - vec3(0.5);
    vec2 uvDetailed = texCoord * detailedTiling + vec2(0.0, cc_time.w) * detailedSpeed;
    vec3 nmmpDetailed = texture(normalMapDetailed, uvDetailed).xyz - vec3(0.5);
    // normal blending
    nmmp = BlendDetailedNormalMap(nmmp, nmmpDetailed, detailedIntensity);
    return normalize(CalculateNormalFromTangentSpace(nmmp, normalIntensity, N, T, FSInput_mirrorNormal));
  }


  #define CC_SURFACES_FRAGMENT_MODIFY_WORLD_NORMAL
  vec3 SurfacesFragmentModifyWorldNormal()
  {
    vec3 normal = FSInput_worldNormal;
    #if USE_NORMAL_MAP
      normal = GetDetailedNormal(NORMAL_UV, pbrParams.x, normalMap, normalMapDetailed, normalize(normal), normalize(FSInput_worldTangent));
    #endif

    return normalize(normal);
  }

  #define CC_SURFACES_FRAGMENT_MODIFY_IOR
  float SurfacesFragmentModifyIOR()
  {
      return 1.33;
  }
#define CC_SURFACES_FRAGMENT_MODIFY_TRANSMIT_SCATTERING_PARAMS
vec4 SurfacesFragmentModifyTransmitScatteringParams()
{
  #if USE_WATER_SCATTERING
    float depth = max(abs(FSInput_texcoord.x - 0.5), abs(FSInput_texcoord.y - 0.5)) * 2.0;
    depth = saturate(1.0 - depth);
    return vec4(waterColor.w, 1.0, 1.0, depth);
  #else
    return vec4(0.0, 0.0, 0.0, 0.0);
  #endif
}

#define CC_SURFACES_FRAGMENT_MODIFY_TRANSMIT_IN_SCATTERING_COLOR
vec3 SurfacesFragmentModifyTransmitInScatteringColor()
{
    return waterColor.rgb;
}

  #include <surfaces/data-structures/standard>
  #include <lighting-models/includes/common>
  #define CC_SURFACES_LIGHTING_MODIFY_FINAL_RESULT
  void SurfacesLightingModifyFinalResult(inout LightingResult result, in LightingIntermediateData lightingData, in SurfacesMaterialData surfaceData, in LightingMiscData miscData)
  {
    #if CC_SURFACES_LIGHTING_USE_FRESNEL
      result.fresnel = saturate(result.fresnel * pbrParams.z);
    #endif
  }

  #define CC_SURFACES_FRAGMENT_MODIFY_PBRPARAMS
  vec4 SurfacesFragmentModifyPBRParams()
  {
    // ao, roughness, metallic, specularIntensity
    return vec4(1.0, pbrParams.y, 1.0, 0.5);
  }
}%

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>
}%