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235 行
12 KiB
235 行
12 KiB
#ifndef UNITY_MATERIAL_INCLUDED
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#define UNITY_MATERIAL_INCLUDED
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#include "../../Core/ShaderLibrary/Color.hlsl"
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#include "../../Core/ShaderLibrary/Packing.hlsl"
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#include "../../Core/ShaderLibrary/BSDF.hlsl"
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#include "../../Core/ShaderLibrary/Debug.hlsl"
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#include "../../Core/ShaderLibrary/GeometricTools.hlsl"
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#include "../../Core/ShaderLibrary/CommonMaterial.hlsl"
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#include "../../Core/ShaderLibrary/EntityLighting.hlsl"
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#include "../../Core/ShaderLibrary/ImageBasedLighting.hlsl"
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#include "../Sky/AtmosphericScattering/AtmosphericScattering.hlsl"
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// Guidelines for Material Keyword.
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// There is a set of Material Keyword that a HD shaders must define (or not define). We call them system KeyWord.
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// .Shader need to define:
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// - _SURFACE_TYPE_TRANSPARENT if they use a transparent material
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// - _BLENDMODE_ALPHA, _BLENDMODE_ADD, _BLENDMODE_MULTIPLY, _BLENDMODE_PRE_MULTIPLY for blend mode
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// - _BLENDMODE_PRESERVE_SPECULAR_LIGHTING for correct lighting when blend mode are use with a Lit material
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// - _ENABLE_FOG_ON_TRANSPARENT if fog is enable on transparent surface
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//-----------------------------------------------------------------------------
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// ApplyBlendMode function
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//-----------------------------------------------------------------------------
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float4 ApplyBlendMode(float3 diffuseLighting, float3 specularLighting, float opacity)
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{
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// ref: http://advances.realtimerendering.com/other/2016/naughty_dog/NaughtyDog_TechArt_Final.pdf
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// Lit transparent object should have reflection and tramission.
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// Transmission when not using "rough refraction mode" (with fetch in preblured background) is handled with blend mode.
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// However reflection should not be affected by blend mode. For example a glass should still display reflection and not lose the highlight when blend
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// This is the purpose of following function, "Cancel" the blend mode effect on the specular lighting but not on the diffuse lighting
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#ifdef _BLENDMODE_PRESERVE_SPECULAR_LIGHTING
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// In the case of _BLENDMODE_ALPHA the code should be float4(diffuseLighting + (specularLighting / max(opacity, 0.01)), opacity)
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// However this have precision issue when reaching 0, so we change the blend mode and apply src * src_a inside the shader instead
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#if defined(_BLENDMODE_ADD) || defined(_BLENDMODE_ALPHA)
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return float4(diffuseLighting * opacity + specularLighting, opacity);
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#else // defined(_BLENDMODE_MULTIPLY) || defined(_BLENDMODE_PRE_MULTIPLY)
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return float4(diffuseLighting + specularLighting, opacity);
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#endif
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#else
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#if defined(_BLENDMODE_ADD) || defined(_BLENDMODE_ALPHA)
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return float4((diffuseLighting + specularLighting) * opacity, opacity);
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#else // defined(_BLENDMODE_MULTIPLY) || defined(_BLENDMODE_PRE_MULTIPLY)
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return float4(diffuseLighting + specularLighting, opacity);
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#endif
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#endif
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}
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float4 ApplyBlendMode(float3 color, float opacity)
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{
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return ApplyBlendMode(color, float3(0.0, 0.0, 0.0), opacity);
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}
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//-----------------------------------------------------------------------------
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// Fog sampling function for materials
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//-----------------------------------------------------------------------------
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// Used for transparent object. input color is color + alpha of the original transparent pixel.
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// This must be call after ApplyBlendMode to work correctly
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float4 EvaluateAtmosphericScattering(PositionInputs posInput, float4 inputColor)
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{
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float4 result = inputColor;
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#ifdef _ENABLE_FOG_ON_TRANSPARENT
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float4 fog = EvaluateAtmosphericScattering(posInput);
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#if defined(_BLENDMODE_ALPHA)
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// Regular alpha blend need to multiply fog color by opacity (as we do src * src_a inside the shader)
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result.rgb = lerp(result.rgb, fog.rgb * result.a, fog.a);
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#elif defined(_BLENDMODE_ADD)
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// For additive, we just need to fade to black with fog density (black + background == background color == fog color)
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result.rgb = result.rgb * (1.0 - fog.a);
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#elif defined(_BLENDMODE_MULTIPLY)
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// For multiplicative, we just need to fade to white with fog density (white * background == background color == fog color)
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result.rgb = lerp(result.rgb, float3(1.0, 1.0, 1.0), fog.a);
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#elif defined(_BLENDMODE_PRE_MULTIPLY)
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// For Pre-Multiplied Alpha Blend, we need to multiply fog color by src alpha to match regular alpha blending formula.
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result.rgb = lerp(result.rgb, fog.rgb * result.a, fog.a);
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#endif
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#else
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// Evaluation of fog for opaque objects is currently done in a full screen pass independent from any material parameters.
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// but this funtction is called in generic forward shader code so we need it to be neutral in this case.
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#endif
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return result;
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}
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//-----------------------------------------------------------------------------
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// BuiltinData
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//-----------------------------------------------------------------------------
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#include "Builtin/BuiltinData.hlsl"
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//-----------------------------------------------------------------------------
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// Material definition
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//-----------------------------------------------------------------------------
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// Here we include all the different lighting model supported by the renderloop based on define done in .shader
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// Only one deferred layout is allowed for a HDRenderPipeline, this will be detect by the redefinition of GBUFFERMATERIAL_COUNT
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// If GBUFFERMATERIAL_COUNT is define two time, the shaders will not compile
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#ifdef UNITY_MATERIAL_LIT
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#include "Lit/Lit.hlsl"
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#elif defined(UNITY_MATERIAL_UNLIT)
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#include "Unlit/Unlit.hlsl"
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#elif defined(UNITY_MATERIAL_IRIDESCENCE)
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//#include "Iridescence/Iridescence.hlsl"
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#endif
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//-----------------------------------------------------------------------------
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// Define for GBuffer management
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//-----------------------------------------------------------------------------
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#ifdef GBUFFERMATERIAL_COUNT
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#if GBUFFERMATERIAL_COUNT == 2
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#define OUTPUT_GBUFFER(NAME) \
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out GBufferType0 MERGE_NAME(NAME, 0) : SV_Target0, \
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out GBufferType1 MERGE_NAME(NAME, 1) : SV_Target1
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#define DECLARE_GBUFFER_TEXTURE(NAME) \
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TEXTURE2D(MERGE_NAME(NAME, 0)); \
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TEXTURE2D(MERGE_NAME(NAME, 1));
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#define FETCH_GBUFFER(NAME, TEX, unCoord2) \
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GBufferType0 MERGE_NAME(NAME, 0) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 0), unCoord2); \
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GBufferType1 MERGE_NAME(NAME, 1) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 1), unCoord2);
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#define ENCODE_INTO_GBUFFER(SURFACE_DATA, BAKE_DIFFUSE_LIGHTING, NAME) EncodeIntoGBuffer(SURFACE_DATA, BAKE_DIFFUSE_LIGHTING, MERGE_NAME(NAME,0), MERGE_NAME(NAME,1))
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#define DECODE_FROM_GBUFFER(NAME, FEATURE_FLAGS, BSDF_DATA, BAKE_DIFFUSE_LIGHTING) DecodeFromGBuffer(MERGE_NAME(NAME,0), MERGE_NAME(NAME,1), FEATURE_FLAGS, BSDF_DATA, BAKE_DIFFUSE_LIGHTING)
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#define MATERIAL_FEATURE_FLAGS_FROM_GBUFFER(NAME) MaterialFeatureFlagsFromGBuffer(MERGE_NAME(NAME,0), MERGE_NAME(NAME,1))
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#if SHADEROPTIONS_VELOCITY_IN_GBUFFER
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#define OUTPUT_GBUFFER_VELOCITY(NAME) ,out float4 NAME : SV_Target2
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#endif
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#elif GBUFFERMATERIAL_COUNT == 3
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#define OUTPUT_GBUFFER(NAME) \
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out GBufferType0 MERGE_NAME(NAME, 0) : SV_Target0, \
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out GBufferType1 MERGE_NAME(NAME, 1) : SV_Target1, \
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out GBufferType2 MERGE_NAME(NAME, 2) : SV_Target2
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#define DECLARE_GBUFFER_TEXTURE(NAME) \
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TEXTURE2D(MERGE_NAME(NAME, 0)); \
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TEXTURE2D(MERGE_NAME(NAME, 1)); \
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TEXTURE2D(MERGE_NAME(NAME, 2));
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#define FETCH_GBUFFER(NAME, TEX, unCoord2) \
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GBufferType0 MERGE_NAME(NAME, 0) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 0), unCoord2); \
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GBufferType1 MERGE_NAME(NAME, 1) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 1), unCoord2); \
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GBufferType2 MERGE_NAME(NAME, 2) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 2), unCoord2);
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#define ENCODE_INTO_GBUFFER(SURFACE_DATA, BAKE_DIFFUSE_LIGHTING, NAME) EncodeIntoGBuffer(SURFACE_DATA, BAKE_DIFFUSE_LIGHTING, MERGE_NAME(NAME,0), MERGE_NAME(NAME,1), MERGE_NAME(NAME,2))
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#define DECODE_FROM_GBUFFER(NAME, FEATURE_FLAGS, BSDF_DATA, BAKE_DIFFUSE_LIGHTING) DecodeFromGBuffer(MERGE_NAME(NAME,0), MERGE_NAME(NAME,1), MERGE_NAME(NAME,2), FEATURE_FLAGS, BSDF_DATA, BAKE_DIFFUSE_LIGHTING)
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#define MATERIAL_FEATURE_FLAGS_FROM_GBUFFER(NAME) MaterialFeatureFlagsFromGBuffer(MERGE_NAME(NAME,0), MERGE_NAME(NAME,1), MERGE_NAME(NAME,2))
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#if SHADEROPTIONS_VELOCITY_IN_GBUFFER
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#define OUTPUT_GBUFFER_VELOCITY(NAME) ,out float4 NAME : SV_Target3
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#endif
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#elif GBUFFERMATERIAL_COUNT == 4
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#define OUTPUT_GBUFFER(NAME) \
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out GBufferType0 MERGE_NAME(NAME, 0) : SV_Target0, \
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out GBufferType1 MERGE_NAME(NAME, 1) : SV_Target1, \
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out GBufferType2 MERGE_NAME(NAME, 2) : SV_Target2, \
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out GBufferType3 MERGE_NAME(NAME, 3) : SV_Target3
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#define DECLARE_GBUFFER_TEXTURE(NAME) \
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TEXTURE2D(MERGE_NAME(NAME, 0)); \
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TEXTURE2D(MERGE_NAME(NAME, 1)); \
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TEXTURE2D(MERGE_NAME(NAME, 2)); \
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TEXTURE2D(MERGE_NAME(NAME, 3));
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#define FETCH_GBUFFER(NAME, TEX, unCoord2) \
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GBufferType0 MERGE_NAME(NAME, 0) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 0), unCoord2); \
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GBufferType1 MERGE_NAME(NAME, 1) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 1), unCoord2); \
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GBufferType2 MERGE_NAME(NAME, 2) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 2), unCoord2); \
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GBufferType3 MERGE_NAME(NAME, 3) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 3), unCoord2);
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#define ENCODE_INTO_GBUFFER(SURFACE_DATA, BAKE_DIFFUSE_LIGHTING, NAME) EncodeIntoGBuffer(SURFACE_DATA, BAKE_DIFFUSE_LIGHTING, MERGE_NAME(NAME, 0), MERGE_NAME(NAME, 1), MERGE_NAME(NAME, 2), MERGE_NAME(NAME, 3))
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#define DECODE_FROM_GBUFFER(NAME, FEATURE_FLAGS, BSDF_DATA, BAKE_DIFFUSE_LIGHTING) DecodeFromGBuffer(MERGE_NAME(NAME, 0), MERGE_NAME(NAME, 1), MERGE_NAME(NAME, 2), MERGE_NAME(NAME, 3), FEATURE_FLAGS, BSDF_DATA, BAKE_DIFFUSE_LIGHTING)
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#define MATERIAL_FEATURE_FLAGS_FROM_GBUFFER(NAME) MaterialFeatureFlagsFromGBuffer(MERGE_NAME(NAME, 0), MERGE_NAME(NAME, 1), MERGE_NAME(NAME, 2), MERGE_NAME(NAME, 3))
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#if SHADEROPTIONS_VELOCITY_IN_GBUFFER
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#define OUTPUT_GBUFFER_VELOCITY(NAME) ,out float4 NAME : SV_Target4
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#endif
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#elif GBUFFERMATERIAL_COUNT == 5
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#define OUTPUT_GBUFFER(NAME) \
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out GBufferType0 MERGE_NAME(NAME, 0) : SV_Target0, \
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out GBufferType1 MERGE_NAME(NAME, 1) : SV_Target1, \
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out GBufferType2 MERGE_NAME(NAME, 2) : SV_Target2, \
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out GBufferType3 MERGE_NAME(NAME, 3) : SV_Target3, \
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out GBufferType4 MERGE_NAME(NAME, 4) : SV_Target4
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#define DECLARE_GBUFFER_TEXTURE(NAME) \
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TEXTURE2D(MERGE_NAME(NAME, 0)); \
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TEXTURE2D(MERGE_NAME(NAME, 1)); \
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TEXTURE2D(MERGE_NAME(NAME, 2)); \
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TEXTURE2D(MERGE_NAME(NAME, 3)); \
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TEXTURE2D(MERGE_NAME(NAME, 4));
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#define FETCH_GBUFFER(NAME, TEX, unCoord2) \
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GBufferType0 MERGE_NAME(NAME, 0) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 0), unCoord2); \
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GBufferType1 MERGE_NAME(NAME, 1) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 1), unCoord2); \
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GBufferType2 MERGE_NAME(NAME, 2) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 2), unCoord2); \
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GBufferType3 MERGE_NAME(NAME, 3) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 3), unCoord2); \
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GBufferType4 MERGE_NAME(NAME, 4) = LOAD_TEXTURE2D(MERGE_NAME(TEX, 4), unCoord2);
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#define ENCODE_INTO_GBUFFER(SURFACE_DATA, BAKE_DIFFUSE_LIGHTING, NAME) EncodeIntoGBuffer(SURFACE_DATA, BAKE_DIFFUSE_LIGHTING, MERGE_NAME(NAME, 0), MERGE_NAME(NAME, 1), MERGE_NAME(NAME, 2), MERGE_NAME(NAME, 3), MERGE_NAME(NAME, 4))
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#define DECODE_FROM_GBUFFER(NAME, FEATURE_FLAGS, BSDF_DATA, BAKE_DIFFUSE_LIGHTING) DecodeFromGBuffer(MERGE_NAME(NAME, 0), MERGE_NAME(NAME, 1), MERGE_NAME(NAME, 2), MERGE_NAME(NAME, 3), MERGE_NAME(NAME, 4), FEATURE_FLAGS, BSDF_DATA, BAKE_DIFFUSE_LIGHTING)
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#define MATERIAL_FEATURE_FLAGS_FROM_GBUFFER(NAME) MaterialFeatureFlagsFromGBuffer(MERGE_NAME(NAME, 0), MERGE_NAME(NAME, 1), MERGE_NAME(NAME, 2), MERGE_NAME(NAME, 3), MERGE_NAME(NAME, 4))
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#if SHADEROPTIONS_VELOCITY_IN_GBUFFER
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#define OUTPUT_GBUFFER_VELOCITY(NAME) ,out float4 NAME : SV_Target5
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#endif
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#endif
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#if SHADEROPTIONS_VELOCITY_IN_GBUFFER
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#define ENCODE_VELOCITY_INTO_GBUFFER(VELOCITY, NAME) EncodeVelocity(VELOCITY, NAME)
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#else
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#define OUTPUT_GBUFFER_VELOCITY(NAME)
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#define ENCODE_VELOCITY_INTO_GBUFFER(VELOCITY, NAME)
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#endif
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#endif // #ifdef GBUFFERMATERIAL_COUNT
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#endif // UNITY_MATERIAL_INCLUDED
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