ScriptableRenderPipeline/Assets/ScriptableRenderLoop/HDRenderLoop/Material/LayeredLit/LayeredLit.shader

Shader "HDRenderLoop/LayeredLit"
{
    Properties
    {
        // Following set of parameters represent the parameters node inside the MaterialGraph.
        // They are use to fill a SurfaceData. With a MaterialGraph this should not exist.

        // Reminder. Color here are in linear but the UI (color picker) do the conversion sRGB to linear
        _BaseColor0("BaseColor0", Color) = (1, 1, 1, 1)
        _BaseColor1("BaseColor1", Color) = (1, 1, 1, 1)
        _BaseColor2("BaseColor2", Color) = (1, 1, 1, 1)
        _BaseColor3("BaseColor3", Color) = (1, 1, 1, 1)

        _BaseColorMap0("BaseColorMap0", 2D) = "white" {}
        _BaseColorMap1("BaseColorMap1", 2D) = "white" {}
        _BaseColorMap2("BaseColorMap2", 2D) = "white" {}
        _BaseColorMap3("BaseColorMap3", 2D) = "white" {}

        _Metallic0("Metallic0", Range(0.0, 1.0)) = 0
        _Metallic1("Metallic1", Range(0.0, 1.0)) = 0
        _Metallic2("Metallic2", Range(0.0, 1.0)) = 0
        _Metallic3("Metallic3", Range(0.0, 1.0)) = 0

        _Smoothness0("Smoothness0", Range(0.0, 1.0)) = 0.5
        _Smoothness1("Smoothness1", Range(0.0, 1.0)) = 0.5
        _Smoothness2("Smoothness2", Range(0.0, 1.0)) = 0.5
        _Smoothness3("Smoothness3", Range(0.0, 1.0)) = 0.5

        _MaskMap0("MaskMap0", 2D) = "white" {}
        _MaskMap1("MaskMap1", 2D) = "white" {}
        _MaskMap2("MaskMap2", 2D) = "white" {}
        _MaskMap3("MaskMap3", 2D) = "white" {}

        _SpecularOcclusionMap0("SpecularOcclusion0", 2D) = "white" {}
        _SpecularOcclusionMap1("SpecularOcclusion1", 2D) = "white" {}
        _SpecularOcclusionMap2("SpecularOcclusion2", 2D) = "white" {}
        _SpecularOcclusionMap3("SpecularOcclusion3", 2D) = "white" {}

        _NormalMap0("NormalMap0", 2D) = "bump" {}
        _NormalMap1("NormalMap1", 2D) = "bump" {}
        _NormalMap2("NormalMap2", 2D) = "bump" {}
        _NormalMap3("NormalMap3", 2D) = "bump" {}

        _HeightMap0("HeightMap0", 2D) = "black" {}
        _HeightMap1("HeightMap1", 2D) = "black" {}
        _HeightMap2("HeightMap2", 2D) = "black" {}
        _HeightMap3("HeightMap3", 2D) = "black" {}

        _HeightScale0("Height Scale0", Float) = 1
        _HeightScale1("Height Scale1", Float) = 1
        _HeightScale2("Height Scale2", Float) = 1
        _HeightScale3("Height Scale3", Float) = 1

        _HeightBias0("Height Bias0", Float) = 0
        _HeightBias1("Height Bias1", Float) = 0
        _HeightBias2("Height Bias2", Float) = 0
        _HeightBias3("Height Bias3", Float) = 0

        _DetailMap0("DetailMap0", 2D) = "black" {}
        _DetailMap1("DetailMap1", 2D) = "black" {}
        _DetailMap2("DetailMap2", 2D) = "black" {}
        _DetailMap3("DetailMap3", 2D) = "black" {}

        _DetailMask0("DetailMask0", 2D) = "white" {}
        _DetailMask1("DetailMask1", 2D) = "white" {}
        _DetailMask2("DetailMask2", 2D) = "white" {}
        _DetailMask3("DetailMask3", 2D) = "white" {}

        _DetailAlbedoScale0("_DetailAlbedoScale0", Range(-2.0, 2.0)) = 1
        _DetailAlbedoScale1("_DetailAlbedoScale1", Range(-2.0, 2.0)) = 1
        _DetailAlbedoScale2("_DetailAlbedoScale2", Range(-2.0, 2.0)) = 1
        _DetailAlbedoScale3("_DetailAlbedoScale3", Range(-2.0, 2.0)) = 1

        _DetailNormalScale0("_DetailNormalScale0", Range(0.0, 2.0)) = 1
        _DetailNormalScale1("_DetailNormalScale1", Range(0.0, 2.0)) = 1
        _DetailNormalScale2("_DetailNormalScale2", Range(0.0, 2.0)) = 1
        _DetailNormalScale3("_DetailNormalScale3", Range(0.0, 2.0)) = 1

        _DetailSmoothnessScale0("_DetailSmoothnessScale0", Range(-2.0, 2.0)) = 1
        _DetailSmoothnessScale1("_DetailSmoothnessScale1", Range(-2.0, 2.0)) = 1
        _DetailSmoothnessScale2("_DetailSmoothnessScale2", Range(-2.0, 2.0)) = 1
        _DetailSmoothnessScale3("_DetailSmoothnessScale3", Range(-2.0, 2.0)) = 1

        _DetailHeightScale0("_DetailHeightScale0", Range(-2.0, 2.0)) = 1
        _DetailHeightScale1("_DetailHeightScale1", Range(-2.0, 2.0)) = 1
        _DetailHeightScale2("_DetailHeightScale2", Range(-2.0, 2.0)) = 1
        _DetailHeightScale3("_DetailHeightScale3", Range(-2.0, 2.0)) = 1

        _DetailAOScale0("_DetailAOScale0", Range(-2.0, 2.0)) = 1
        _DetailAOScale1("_DetailAOScale1", Range(-2.0, 2.0)) = 1
        _DetailAOScale2("_DetailAOScale2", Range(-2.0, 2.0)) = 1
        _DetailAOScale3("_DetailAOScale3", Range(-2.0, 2.0)) = 1

        // Specific to planar mapping
        _TexWorldScale0("TexWorldScale0", Float) = 1.0
        _TexWorldScale1("TexWorldScale1", Float) = 1.0
        _TexWorldScale2("TexWorldScale2", Float) = 1.0
        _TexWorldScale3("TexWorldScale3", Float) = 1.0

        // Blend mask between layer
        _LayerMaskMap("LayerMaskMap", 2D) = "white" {}
        [ToggleOff]  _LayerMaskVertexColor("Use Vertex Color Mask", Float) = 0.0

        _EmissiveColor("EmissiveColor", Color) = (0, 0, 0)
        _EmissiveColorMap("EmissiveColorMap", 2D) = "white" {}
        _EmissiveIntensity("EmissiveIntensity", Float) = 0

        [ToggleOff]     _DistortionOnly("Distortion Only", Float) = 0.0
        [ToggleOff]     _DistortionDepthTest("Distortion Only", Float) = 0.0

        [ToggleOff]  _AlphaCutoffEnable("Alpha Cutoff Enable", Float) = 0.0

        _AlphaCutoff("Alpha Cutoff", Range(0.0, 1.0)) = 0.5

        // Blending state
        [HideInInspector] _SurfaceType("__surfacetype", Float) = 0.0
        [HideInInspector] _BlendMode ("__blendmode", Float) = 0.0
        [HideInInspector] _SrcBlend ("__src", Float) = 1.0
        [HideInInspector] _DstBlend ("__dst", Float) = 0.0
        [HideInInspector] _ZWrite ("__zw", Float) = 1.0
        [HideInInspector] _CullMode("__cullmode", Float) = 2.0

        [Enum(None, 0, DoubleSided, 1, DoubleSidedLigthingFlip, 2, DoubleSidedLigthingMirror, 3)] _DoubleSidedMode("Double sided mode", Float) = 0

        [Enum(Mask Alpha, 0, BaseColor Alpha, 1)] _SmoothnessTextureChannel("Smoothness texture channel", Float) = 1
        [Enum(TangentSpace, 0, ObjectSpace, 1)] _NormalMapSpace("NormalMap space", Float) = 0
        [Enum(Parallax, 0, Displacement, 1)] _HeightMapMode("Heightmap usage", Float) = 0
        [Enum(DetailMapNormal, 0, DetailMapAOHeight, 1)] _DetailMapMode("DetailMap mode", Float) = 0
        [Enum(Use Emissive Color, 0, Use Emissive Mask, 1)] _EmissiveColorMode("Emissive color mode", Float) = 1

        [HideInInspector] _LayerCount("_LayerCount", Float) = 2.0

        _TexWorldScale0("Scale to apply on world coordinate", Float) = 1.0
        _TexWorldScale1("Scale to apply on world coordinate", Float) = 1.0
        _TexWorldScale2("Scale to apply on world coordinate", Float) = 1.0
        _TexWorldScale3("Scale to apply on world coordinate", Float) = 1.0

        [Enum(UV0, 0, UV1, 1, UV3, 2, Planar, 3, Triplanar, 4)] _UVBase0("UV Set for base0", Float) = 0
        [Enum(UV0, 0, UV1, 1, UV3, 2, Planar, 3, Triplanar, 4)] _UVBase1("UV Set for base1", Float) = 0
        [Enum(UV0, 0, UV1, 1, UV3, 2, Planar, 3, Triplanar, 4)] _UVBase2("UV Set for base2", Float) = 0
        [Enum(UV0, 0, UV1, 1, UV3, 2, Planar, 3, Triplanar, 4)] _UVBase3("UV Set for base3", Float) = 0

        [HideInInspector] _UVMappingMask0("_UVMappingMask0", Color) = (1, 0, 0, 0)
        [HideInInspector] _UVMappingMask1("_UVMappingMask1", Color) = (1, 0, 0, 0)
        [HideInInspector] _UVMappingMask2("_UVMappingMask2", Color) = (1, 0, 0, 0)
        [HideInInspector] _UVMappingMask3("_UVMappingMask3", Color) = (1, 0, 0, 0)

        [Enum(UV0, 0, UV1, 1, UV3, 2)] _UVDetail0("UV Set for detail0", Float) = 0
        [Enum(UV0, 0, UV1, 1, UV3, 2)] _UVDetail1("UV Set for detail1", Float) = 0
        [Enum(UV0, 0, UV1, 1, UV3, 2)] _UVDetail2("UV Set for detail2", Float) = 0
        [Enum(UV0, 0, UV1, 1, UV3, 2)] _UVDetail3("UV Set for detail3", Float) = 0

        [HideInInspector] _UVDetailsMappingMask0("_UVDetailsMappingMask0", Float) = 0
        [HideInInspector] _UVDetailsMappingMask1("_UVDetailsMappingMask1", Float) = 0
        [HideInInspector] _UVDetailsMappingMask2("_UVDetailsMappingMask2", Float) = 0
        [HideInInspector] _UVDetailsMappingMask3("_UVDetailsMappingMask3", Float) = 0

        // Unused but to be able to share litUI.Sahder and layeredUI.Shader
        [HideInInspector] _UVBase("UV Set for base", Float) = 0
        [HideInInspector] _UVDetail("UV Set for base", Float) = 0
        [HideInInspector] _TexWorldScale("Scale to apply on world coordinate", Float) = 1.0
        [HideInInspector] _UVMappingMask("_UVMappingMask", Color) = (1, 0, 0, 0)
        [HideInInspector] _UVDetailsMappingMask("_UVDetailsMappingMask", Color) = (1, 0, 0, 0)
    }

    HLSLINCLUDE

    #pragma target 5.0
    #pragma only_renderers d3d11 // TEMP: unitl we go futher in dev

    #pragma shader_feature _ALPHATEST_ON
    #pragma shader_feature _ _DOUBLESIDED_LIGHTING_FLIP _DOUBLESIDED_LIGHTING_MIRROR

    #pragma shader_feature _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A
    #pragma shader_feature _LAYER_MAPPING_TRIPLANAR_0
    #pragma shader_feature _LAYER_MAPPING_TRIPLANAR_1
    #pragma shader_feature _LAYER_MAPPING_TRIPLANAR_2
    #pragma shader_feature _LAYER_MAPPING_TRIPLANAR_3
    #pragma shader_feature _DETAIL_MAP_WITH_NORMAL
    #pragma shader_feature _NORMALMAP_TANGENT_SPACE   
    #pragma shader_feature _HEIGHTMAP_AS_DISPLACEMENT
    #pragma shader_feature _REQUIRE_UV3
    #pragma shader_feature _EMISSIVE_COLOR

    #pragma shader_feature _NORMALMAP
    #pragma shader_feature _MASKMAP
    #pragma shader_feature _SPECULAROCCLUSIONMAP
    #pragma shader_feature _EMISSIVE_COLOR_MAP
    #pragma shader_feature _HEIGHTMAP
    #pragma shader_feature _DETAIL_MAP
    #pragma shader_feature _LAYER_MASK_VERTEX_COLOR
    #pragma shader_feature _ _LAYEREDLIT_3_LAYERS _LAYEREDLIT_4_LAYERS

    #pragma multi_compile LIGHTMAP_OFF LIGHTMAP_ON
    #pragma multi_compile DIRLIGHTMAP_OFF DIRLIGHTMAP_COMBINED
    #pragma multi_compile DYNAMICLIGHTMAP_OFF DYNAMICLIGHTMAP_ON
    // TODO: We should have this keyword only if VelocityInGBuffer is enable, how to do that ?
    //#pragma multi_compile VELOCITYOUTPUT_OFF VELOCITYOUTPUT_ON 

    //-------------------------------------------------------------------------------------
    // Define
    //-------------------------------------------------------------------------------------

    #define UNITY_MATERIAL_LIT // Need to be define before including Material.hlsl

    //-------------------------------------------------------------------------------------
    // Include
    //-------------------------------------------------------------------------------------

    #include "common.hlsl"
    #include "Assets/ScriptableRenderLoop/HDRenderLoop/ShaderConfig.cs.hlsl"
    #include "Assets/ScriptableRenderLoop/HDRenderLoop/ShaderVariables.hlsl"
    #include "Assets/ScriptableRenderLoop/HDRenderLoop/Material/Attributes.hlsl"
    #include "Assets/ScriptableRenderLoop/HDRenderLoop/ShaderPass/ShaderPass.cs.hlsl"    

    //-------------------------------------------------------------------------------------
    // variable declaration
    //-------------------------------------------------------------------------------------


    #define _MAX_LAYER 4

    #if defined(_LAYEREDLIT_4_LAYERS)
    #   define _LAYER_COUNT 4
    #elif defined(_LAYEREDLIT_3_LAYERS)
    #   define _LAYER_COUNT 3
    #else
    #   define _LAYER_COUNT 2
    #endif

    // Set of users variables
    #define PROP_DECL(type, name) type name, name##0, name##1, name##2, name##3;
    #define PROP_DECL_TEX2D(name)\
        TEXTURE2D(name##0); \
        SAMPLER2D(sampler##name##0); \
        TEXTURE2D(name##1); \
        TEXTURE2D(name##2); \
        TEXTURE2D(name##3);

    //-------------------------------------------------------------------------------------
    // variable declaration
    //-------------------------------------------------------------------------------------

    // Set of users variables
    PROP_DECL(float4, _BaseColor);
    PROP_DECL_TEX2D(_BaseColorMap);

    PROP_DECL(float, _Metallic);
    PROP_DECL(float, _Smoothness);
    PROP_DECL_TEX2D(_MaskMap);
    PROP_DECL_TEX2D(_SpecularOcclusionMap);

    PROP_DECL_TEX2D(_NormalMap);
    PROP_DECL_TEX2D(_HeightMap);

    PROP_DECL_TEX2D(_DetailMask);
    PROP_DECL_TEX2D(_DetailMap);
    float4 _DetailMap0_ST;
    float4 _DetailMap1_ST;
    float4 _DetailMap2_ST;
    float4 _DetailMap3_ST;
    PROP_DECL(float, _UVDetail);
    PROP_DECL(float, _DetailAlbedoScale);
    PROP_DECL(float, _DetailNormalScale);
    PROP_DECL(float, _DetailSmoothnessScale);
    PROP_DECL(float, _DetailHeightScale);
    PROP_DECL(float, _DetailAOScale);

    PROP_DECL(float, _HeightScale);
    PROP_DECL(float, _HeightBias);

    TEXTURE2D(_DiffuseLightingMap);
    SAMPLER2D(sampler_DiffuseLightingMap);

    TEXTURE2D(_LayerMaskMap);
    SAMPLER2D(sampler_LayerMaskMap);

    float3 _EmissiveColor;
    TEXTURE2D(_EmissiveColorMap);
    SAMPLER2D(sampler_EmissiveColorMap);
    float _EmissiveIntensity;

    PROP_DECL(float, _TexWorldScale);
    PROP_DECL(float4, _UVMappingMask);
    PROP_DECL(float4, _UVDetailsMappingMask);

    float _AlphaCutoff;

    ENDHLSL

    SubShader
    {
        Tags { "RenderType"="Opaque" "PerformanceChecks"="False" }
        LOD 300

       Pass
        {
            Name "GBuffer"  // Name is not used
            Tags { "LightMode" = "GBuffer" } // This will be only for opaque object based on the RenderQueue index

            Cull  [_CullMode]

            HLSLPROGRAM

            #pragma vertex VertDefault
            #pragma fragment Frag

            #define SHADERPASS SHADERPASS_GBUFFER
            #define LAYERED_LIT_SHADER

            #include "../../Material/Material.hlsl"
            #include "../Lit/LitData.hlsl"
            #include "../Lit/LitSharePass.hlsl"    

            #include "../../ShaderPass/ShaderPassGBuffer.hlsl"

            ENDHLSL
        }

        Pass
        {
            Name "Debug"
            Tags{ "LightMode" = "DebugViewMaterial" }

            Cull[_CullMode]

            HLSLPROGRAM

            #pragma vertex VertDefault
            #pragma fragment Frag

            #define SHADERPASS SHADERPASS_DEBUG_VIEW_MATERIAL
            #define LAYERED_LIT_SHADER

            #include "../../Material/Material.hlsl"
            #include "../Lit/LitData.hlsl"
            #include "../Lit/LitSharePass.hlsl"

            #include "../../ShaderPass/ShaderPassDebugViewMaterial.hlsl"

            ENDHLSL
        }

        // Extracts information for lightmapping, GI (emission, albedo, ...)
        // This pass it not used during regular rendering.
        Pass
        {
            Name "META"
            Tags{ "LightMode" = "Meta" }

            Cull Off

            HLSLPROGRAM

            // Lightmap memo
            // DYNAMICLIGHTMAP_ON is used when we have an "enlighten lightmap" ie a lightmap updated at runtime by enlighten.This lightmap contain indirect lighting from realtime lights and realtime emissive material.Offline baked lighting(from baked material / light, 
            // both direct and indirect lighting) will hand up in the "regular" lightmap->LIGHTMAP_ON.

            #pragma vertex Vert
            #pragma fragment Frag

            #define SHADERPASS SHADERPASS_LIGHT_TRANSPORT
            #define LAYERED_LIT_SHADER
            #include "../../Material/Material.hlsl"
            #include "../Lit/LitData.hlsl"
            #include "../Lit/LitMetaPass.hlsl"

            #include "../../ShaderPass/ShaderPassLightTransport.hlsl"

            ENDHLSL
        }

        Pass
        {
            Name "Motion Vectors"
            Tags{ "LightMode" = "MotionVectors" } // Caution, this need to be call like this to setup the correct parameters by C++ (legacy Unity)

            Cull[_CullMode]

            ZTest LEqual
            ZWrite Off // TODO: Test Z equal here.

            HLSLPROGRAM

            #pragma vertex Vert
            #pragma fragment Frag

            #define SHADERPASS SHADERPASS_VELOCITY
            #define LAYERED_LIT_SHADER
            #include "../../Material/Material.hlsl"         
            #include "../Lit/LitData.hlsl"
            #include "../Lit/LitVelocityPass.hlsl"

            #include "../../ShaderPass/ShaderPassVelocity.hlsl"

            ENDHLSL
        }

        Pass
        {
            Name "ShadowCaster"
            Tags{ "LightMode" = "ShadowCaster" }

            Cull[_CullMode]

            ZWrite On ZTest LEqual

            HLSLPROGRAM

            #pragma vertex Vert
            #pragma fragment Frag

            #define SHADERPASS SHADERPASS_DEPTH_ONLY
            #define LAYERED_LIT_SHADER
            #include "../../Material/Material.hlsl"
            #include "../Lit/LitData.hlsl"
            #include "../Lit/LitDepthPass.hlsl"

            #include "../../ShaderPass/ShaderPassDepthOnly.hlsl"

            ENDHLSL
        }

        Pass
        {
            Name "DepthOnly"
            Tags{ "LightMode" = "DepthOnly" }

            Cull[_CullMode]

            ZWrite On ZTest LEqual

            HLSLPROGRAM

            #pragma vertex Vert
            #pragma fragment Frag

            #define SHADERPASS SHADERPASS_DEPTH_ONLY
            #define LAYERED_LIT_SHADER
            #include "../../Material/Material.hlsl"
            #include "../Lit/LitData.hlsl"
            #include "../Lit/LitDepthPass.hlsl"

            #include "../../ShaderPass/ShaderPassDepthOnly.hlsl"

            ENDHLSL
        }

        Pass
        {
            Name "Forward" // Name is not used
            Tags{ "LightMode" = "Forward" } // This will be only for transparent object based on the RenderQueue index

            Blend[_SrcBlend][_DstBlend]
            ZWrite[_ZWrite]
            Cull[_CullMode]

            HLSLPROGRAM

            #pragma vertex VertDefault
            #pragma fragment Frag

            #define SHADERPASS SHADERPASS_FORWARD
            // TEMP until pragma work in include
            // #include "../../Lighting/Forward.hlsl"
            #pragma multi_compile LIGHTLOOP_SINGLE_PASS
            #define LAYERED_LIT_SHADER
            //#pragma multi_compile SHADOWFILTERING_FIXED_SIZE_PCF

            #include "../../Lighting/Lighting.hlsl"
            #include "../Lit/LitData.hlsl"
            #include "../Lit/LitSharePass.hlsl"

            #include "../../ShaderPass/ShaderPassForward.hlsl"

            ENDHLSL
        }
    }

	CustomEditor "UnityEditor.Experimental.ScriptableRenderLoop.LayeredLitGUI"
}