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chameleon/Assets/Shaders/PictureTessellationLit.shader
T
adminandClaude Fable 5 57a4627b81 PictureFrameBuilder/Shader: lighting parity, HTrace GBuffer pass, absolute frame metrics 
Shader (PictureTessellationLit):
- Lighting parity with URP Lit: lightmaps, shadowmask/mixed, APV, DBuffer
  decals, vertex additional lights, rendering layers, fragment fog
- UniversalGBuffer pass (with tessellation + graded albedo) so HTrace WSGI
  composes correct GI instead of a cyan veil over pictures
- Skip GPU tessellation entirely when strength/displacement is 0
- Inspector ranges matched to builder (-3..3 bump, -10..10 tessellation)

Builder:
- Frame Thickness & Padding are now absolute meters (size-independent)
  instead of fractions of the picture size
- Tooltip updates for the new default/range semantics

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-11 12:30:19 +02:00

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// Forward-only URP PBR shader with hardware tessellation + height-map displacement and an occlusion
// map, built for the PictureFrameBuilder picture surface (works on any mesh with sane UVs).
//
// Deferred+ compatible via the ComplexLit pattern (same as PlayerCamoLit): "UniversalMaterialType" =
// "ComplexLit" stencils these pixels out of the deferred lighting and URP shades them in the
// UniversalForwardOnly pass instead - the only way a custom vertex pipeline (tessellation) can run
// on the deferred path. ALL depth-relevant passes (ShadowCaster / DepthOnly / DepthNormalsOnly) run
// the same hull/domain displacement so shadows, SSAO and depth match the displaced surface.
//
// Displacement = (height - 0.5) * _Displacement * _TessellationStrength along the vertex normal;
// _Displacement is the authored amplitude in meters, _TessellationStrength is the runtime knob the
// PictureFrameBuilder drives per frame (like _BumpScale / _OcclusionStrength).
Shader "Chameleon/PictureTessellationLit"
{
Properties
{
_BaseMap("Albedo", 2D) = "white" {}
_BaseColor("Color", Color) = (1, 1, 1, 1)
_Smoothness("Smoothness", Range(0.0, 1.0)) = 0.5
_Metallic("Metallic", Range(0.0, 1.0)) = 0.0
[Normal] _BumpMap("Normal Map", 2D) = "bump" {}
_BumpScale("Normal Strength", Range(-3.0, 3.0)) = 1.0
_HeightMap("Height Map", 2D) = "gray" {}
_Displacement("Displacement (m)", Range(0.0, 0.2)) = 0.02
_TessellationStrength("Tessellation Strength", Range(-10.0, 10.0)) = 1.0
_TessellationFactor("Tessellation Factor", Range(1.0, 32.0)) = 8.0
_OcclusionMap("Occlusion Map", 2D) = "white" {}
_OcclusionStrength("Occlusion Strength", Range(0.0, 3.0)) = 1.0
_OcclusionContrast("Occlusion Contrast", Range(-1.0, 3.0)) = 0.0
_Brightness("Brightness", Range(0.0, 3.0)) = 1.0
}
SubShader
{
Tags
{
"RenderType" = "Opaque"
"RenderPipeline" = "UniversalPipeline"
"UniversalMaterialType" = "ComplexLit"
"Queue" = "Geometry"
}
LOD 300
HLSLINCLUDE
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
TEXTURE2D(_HeightMap); SAMPLER(sampler_HeightMap);
CBUFFER_START(UnityPerMaterial)
float4 _BaseMap_ST;
half4 _BaseColor;
half _Smoothness;
half _Metallic;
half _BumpScale;
half _Displacement;
half _TessellationStrength;
half _TessellationFactor;
half _OcclusionStrength;
half _OcclusionContrast;
half _Brightness;
CBUFFER_END
struct Attributes
{
float4 positionOS : POSITION;
float3 normalOS : NORMAL;
float4 tangentOS : TANGENT;
float2 uv : TEXCOORD0;
float2 staticLightmapUV : TEXCOORD1;
float2 dynamicLightmapUV : TEXCOORD2;
};
// Hull/domain control point: everything stays in object space until the domain stage.
struct ControlPoint
{
float4 positionOS : INTERNALTESSPOS;
float3 normalOS : NORMAL;
float4 tangentOS : TANGENT;
float2 uv : TEXCOORD0;
float2 staticLightmapUV : TEXCOORD1;
float2 dynamicLightmapUV : TEXCOORD2;
};
struct TessFactors
{
float edge[3] : SV_TessFactor;
float inside : SV_InsideTessFactor;
};
ControlPoint TessVertex(Attributes input)
{
ControlPoint p;
p.positionOS = input.positionOS;
p.normalOS = input.normalOS;
p.tangentOS = input.tangentOS;
p.uv = input.uv;
p.staticLightmapUV = input.staticLightmapUV;
p.dynamicLightmapUV = input.dynamicLightmapUV;
return p;
}
TessFactors PatchConstants(InputPatch<ControlPoint, 3> patch)
{
TessFactors f;
// No displacement -> no reason to subdivide (keeps the wireframe a plain grid).
half factor = (_TessellationStrength == 0.0h || _Displacement == 0.0h) ? 1.0h : _TessellationFactor;
f.edge[0] = factor;
f.edge[1] = factor;
f.edge[2] = factor;
f.inside = factor;
return f;
}
[domain("tri")]
[outputcontrolpoints(3)]
[outputtopology("triangle_cw")]
[partitioning("fractional_odd")]
[patchconstantfunc("PatchConstants")]
ControlPoint TessHull(InputPatch<ControlPoint, 3> patch, uint id : SV_OutputControlPointID)
{
return patch[id];
}
#define TESS_INTERPOLATE(field) (patch[0].field * bary.x + patch[1].field * bary.y + patch[2].field * bary.z)
// Barycentric interpolation + height displacement along the vertex normal; each pass turns
// the resulting object-space vertex into its own varyings in its domain function.
Attributes TessInterpolate(OutputPatch<ControlPoint, 3> patch, float3 bary)
{
Attributes v;
v.positionOS = TESS_INTERPOLATE(positionOS);
v.normalOS = normalize(TESS_INTERPOLATE(normalOS));
v.tangentOS = TESS_INTERPOLATE(tangentOS);
v.uv = TESS_INTERPOLATE(uv);
v.staticLightmapUV = TESS_INTERPOLATE(staticLightmapUV);
v.dynamicLightmapUV = TESS_INTERPOLATE(dynamicLightmapUV);
float height = SAMPLE_TEXTURE2D_LOD(_HeightMap, sampler_HeightMap, TRANSFORM_TEX(v.uv, _BaseMap), 0).r;
v.positionOS.xyz += v.normalOS * ((height - 0.5) * _Displacement * _TessellationStrength);
return v;
}
ENDHLSL
Pass
{
Name "ForwardLit"
Tags { "LightMode" = "UniversalForwardOnly" }
ZWrite On
Cull Back
HLSLPROGRAM
#pragma target 4.6
#pragma vertex TessVertex
#pragma hull TessHull
#pragma domain ForwardDomain
#pragma fragment ForwardFragment
// Keyword set mirrored from URP Lit.shader's ForwardLit pass (Universal Pipeline +
// Unity defined keywords) so every lighting feature the standard Lit supports works
// here too: lightmaps, shadowmask/mixed lighting, APV probe volumes, decals (DBuffer),
// vertex additional lights, rendering-layer output, reflection probe rotation.
#pragma multi_compile _ _MAIN_LIGHT_SHADOWS _MAIN_LIGHT_SHADOWS_CASCADE _MAIN_LIGHT_SHADOWS_SCREEN
#pragma multi_compile _ _ADDITIONAL_LIGHTS_VERTEX _ADDITIONAL_LIGHTS
#pragma multi_compile _ EVALUATE_SH_MIXED EVALUATE_SH_VERTEX
#pragma multi_compile_fragment _ _ADDITIONAL_LIGHT_SHADOWS
#pragma multi_compile_fragment _ _REFLECTION_PROBE_BLENDING
#pragma multi_compile_fragment _ _REFLECTION_PROBE_BOX_PROJECTION
#pragma multi_compile_fragment _ _REFLECTION_PROBE_ATLAS
#pragma multi_compile_fragment _ _SHADOWS_SOFT _SHADOWS_SOFT_LOW _SHADOWS_SOFT_MEDIUM _SHADOWS_SOFT_HIGH
#pragma multi_compile_fragment _ _SCREEN_SPACE_OCCLUSION
#pragma multi_compile_fragment _ _SCREEN_SPACE_IRRADIANCE
#pragma multi_compile_fragment _ _DBUFFER_MRT1 _DBUFFER_MRT2 _DBUFFER_MRT3
#pragma multi_compile_fragment _ _LIGHT_COOKIES
#pragma multi_compile _ _LIGHT_LAYERS
#pragma multi_compile _ _CLUSTER_LIGHT_LOOP
#include_with_pragmas "Packages/com.unity.render-pipelines.universal/ShaderLibrary/RenderingLayers.hlsl"
#pragma multi_compile _ LIGHTMAP_SHADOW_MIXING
#pragma multi_compile _ SHADOWS_SHADOWMASK
#pragma multi_compile _ DIRLIGHTMAP_COMBINED
#pragma multi_compile _ LIGHTMAP_ON
#pragma multi_compile_fragment _ LIGHTMAP_BICUBIC_SAMPLING
#pragma multi_compile_fragment _ REFLECTION_PROBE_ROTATION
#pragma multi_compile _ DYNAMICLIGHTMAP_ON
#pragma multi_compile _ USE_LEGACY_LIGHTMAPS
#include_with_pragmas "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Fog.hlsl"
#include_with_pragmas "Packages/com.unity.render-pipelines.universal/ShaderLibrary/ProbeVolumeVariants.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DBuffer.hlsl"
TEXTURE2D(_BaseMap); SAMPLER(sampler_BaseMap);
TEXTURE2D(_BumpMap); SAMPLER(sampler_BumpMap);
TEXTURE2D(_OcclusionMap); SAMPLER(sampler_OcclusionMap);
struct Varyings
{
float4 positionCS : SV_POSITION;
float2 uv : TEXCOORD0;
float3 positionWS : TEXCOORD1;
float3 normalWS : TEXCOORD2;
float4 tangentWS : TEXCOORD3; // w = bitangent sign
#ifdef _ADDITIONAL_LIGHTS_VERTEX
half4 fogFactorAndVertexLight : TEXCOORD4; // x: fog, yzw: vertex light
#else
half fogFactor : TEXCOORD4;
#endif
DECLARE_LIGHTMAP_OR_SH(staticLightmapUV, vertexSH, 5);
#ifdef DYNAMICLIGHTMAP_ON
float2 dynamicLightmapUV : TEXCOORD6;
#endif
#ifdef USE_APV_PROBE_OCCLUSION
float4 probeOcclusion : TEXCOORD7;
#endif
};
[domain("tri")]
Varyings ForwardDomain(TessFactors factors, OutputPatch<ControlPoint, 3> patch, float3 bary : SV_DomainLocation)
{
Attributes v = TessInterpolate(patch, bary);
VertexPositionInputs pos = GetVertexPositionInputs(v.positionOS.xyz);
VertexNormalInputs nrm = GetVertexNormalInputs(v.normalOS, v.tangentOS);
Varyings o = (Varyings)0;
o.positionCS = pos.positionCS;
o.positionWS = pos.positionWS;
o.normalWS = nrm.normalWS;
o.tangentWS = float4(nrm.tangentWS, v.tangentOS.w * GetOddNegativeScale());
o.uv = TRANSFORM_TEX(v.uv, _BaseMap);
half fogFactor = 0;
#if !defined(_FOG_FRAGMENT)
fogFactor = ComputeFogFactor(pos.positionCS.z);
#endif
#ifdef _ADDITIONAL_LIGHTS_VERTEX
o.fogFactorAndVertexLight = half4(fogFactor, VertexLighting(pos.positionWS, nrm.normalWS));
#else
o.fogFactor = fogFactor;
#endif
OUTPUT_LIGHTMAP_UV(v.staticLightmapUV, unity_LightmapST, o.staticLightmapUV);
#ifdef DYNAMICLIGHTMAP_ON
o.dynamicLightmapUV = v.dynamicLightmapUV * unity_DynamicLightmapST.xy + unity_DynamicLightmapST.zw;
#endif
OUTPUT_SH4(pos.positionWS, o.normalWS, GetWorldSpaceNormalizeViewDir(pos.positionWS), o.vertexSH, o.probeOcclusion);
return o;
}
void ForwardFragment(
Varyings input
, out half4 outColor : SV_Target0
#ifdef _WRITE_RENDERING_LAYERS
, out uint outRenderingLayers : SV_Target1
#endif
)
{
half4 albedo = SAMPLE_TEXTURE2D(_BaseMap, sampler_BaseMap, input.uv) * _BaseColor;
// Height-weighted brightness: raised areas get the full multiplier, deep areas stay
// untouched (height 0.5 = mid-gray default when no map is bound -> half effect).
half heightBr = SAMPLE_TEXTURE2D(_HeightMap, sampler_HeightMap, input.uv).r;
albedo.rgb *= lerp(1.0h, _Brightness, heightBr);
half3 normalTS = UnpackNormalScale(SAMPLE_TEXTURE2D(_BumpMap, sampler_BumpMap, input.uv), _BumpScale);
half occ = SAMPLE_TEXTURE2D(_OcclusionMap, sampler_OcclusionMap, input.uv).g;
// Contrast around mid-gray: 0 = as sampled, -1 = flat (no occlusion detail), 3 = 4x.
occ = saturate((occ - 0.5h) * (1.0h + _OcclusionContrast) + 0.5h);
float sgn = input.tangentWS.w;
float3 bitangentWS = sgn * cross(input.normalWS, input.tangentWS.xyz);
half3x3 tbn = half3x3(input.tangentWS.xyz, bitangentWS, input.normalWS);
InputData inputData = (InputData)0;
inputData.positionWS = input.positionWS;
inputData.positionCS = input.positionCS;
inputData.normalWS = NormalizeNormalPerPixel(TransformTangentToWorld(normalTS, tbn));
inputData.viewDirectionWS = GetWorldSpaceNormalizeViewDir(input.positionWS);
inputData.normalizedScreenSpaceUV = GetNormalizedScreenSpaceUV(input.positionCS);
#if defined(_MAIN_LIGHT_SHADOWS_SCREEN)
inputData.shadowCoord = float4(inputData.normalizedScreenSpaceUV, 0, 1);
#else
inputData.shadowCoord = TransformWorldToShadowCoord(input.positionWS);
#endif
#ifdef _ADDITIONAL_LIGHTS_VERTEX
inputData.fogCoord = InitializeInputDataFog(float4(input.positionWS, 1.0), input.fogFactorAndVertexLight.x);
inputData.vertexLighting = input.fogFactorAndVertexLight.yzw;
#else
inputData.fogCoord = InitializeInputDataFog(float4(input.positionWS, 1.0), input.fogFactor);
#endif
// Baked GI exactly like LitForwardPass.InitializeBakedGIData: lightmaps (static/
// dynamic), APV probe volumes, screen-space irradiance, shadowmask - else SH.
#if defined(_SCREEN_SPACE_IRRADIANCE)
inputData.bakedGI = SAMPLE_GI(_ScreenSpaceIrradiance, input.positionCS.xy);
#elif defined(DYNAMICLIGHTMAP_ON)
inputData.bakedGI = SAMPLE_GI(input.staticLightmapUV, input.dynamicLightmapUV, input.vertexSH, inputData.normalWS);
inputData.shadowMask = SAMPLE_SHADOWMASK(input.staticLightmapUV);
#elif !defined(LIGHTMAP_ON) && (defined(PROBE_VOLUMES_L1) || defined(PROBE_VOLUMES_L2))
inputData.bakedGI = SAMPLE_GI(input.vertexSH,
GetAbsolutePositionWS(inputData.positionWS),
inputData.normalWS,
inputData.viewDirectionWS,
input.positionCS.xy,
input.probeOcclusion,
inputData.shadowMask);
#else
inputData.bakedGI = SAMPLE_GI(input.staticLightmapUV, input.vertexSH, inputData.normalWS);
inputData.shadowMask = SAMPLE_SHADOWMASK(input.staticLightmapUV);
#endif
SurfaceData surfaceData = (SurfaceData)0;
surfaceData.albedo = albedo.rgb;
surfaceData.alpha = 1;
surfaceData.metallic = _Metallic;
surfaceData.smoothness = _Smoothness;
surfaceData.normalTS = normalTS;
// Strength > 1 keeps darkening past the authored map (saturate stops negatives).
surfaceData.occlusion = saturate(LerpWhiteTo(occ, _OcclusionStrength));
#if defined(_DBUFFER)
ApplyDecalToSurfaceData(input.positionCS, surfaceData, inputData);
#endif
half4 color = UniversalFragmentPBR(inputData, surfaceData);
color.rgb = MixFog(color.rgb, inputData.fogCoord);
outColor = color;
#ifdef _WRITE_RENDERING_LAYERS
outRenderingLayers = EncodeMeshRenderingLayer();
#endif
}
ENDHLSL
}
Pass
{
Name "ShadowCaster"
Tags { "LightMode" = "ShadowCaster" }
ZWrite On
ZTest LEqual
ColorMask 0
Cull Back
HLSLPROGRAM
#pragma target 4.6
#pragma vertex TessVertex
#pragma hull TessHull
#pragma domain ShadowDomain
#pragma fragment ShadowFragment
// NOT multi_compile_vertex: the keyword is consumed in the DOMAIN stage here.
#pragma multi_compile _ _CASTING_PUNCTUAL_LIGHT_SHADOW
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Shadows.hlsl"
float3 _LightDirection;
float3 _LightPosition;
struct ShadowVaryings
{
float4 positionCS : SV_POSITION;
};
[domain("tri")]
ShadowVaryings ShadowDomain(TessFactors factors, OutputPatch<ControlPoint, 3> patch, float3 bary : SV_DomainLocation)
{
Attributes v = TessInterpolate(patch, bary);
float3 positionWS = TransformObjectToWorld(v.positionOS.xyz);
float3 normalWS = TransformObjectToWorldNormal(v.normalOS);
#if defined(_CASTING_PUNCTUAL_LIGHT_SHADOW)
float3 lightDirectionWS = normalize(_LightPosition - positionWS);
#else
float3 lightDirectionWS = _LightDirection;
#endif
float4 positionCS = TransformWorldToHClip(ApplyShadowBias(positionWS, normalWS, lightDirectionWS));
#if UNITY_REVERSED_Z
positionCS.z = min(positionCS.z, UNITY_NEAR_CLIP_VALUE);
#else
positionCS.z = max(positionCS.z, UNITY_NEAR_CLIP_VALUE);
#endif
ShadowVaryings o;
o.positionCS = positionCS;
return o;
}
half4 ShadowFragment() : SV_Target
{
return 0;
}
ENDHLSL
}
Pass
{
Name "DepthOnly"
Tags { "LightMode" = "DepthOnly" }
ZWrite On
ColorMask R
Cull Back
HLSLPROGRAM
#pragma target 4.6
#pragma vertex TessVertex
#pragma hull TessHull
#pragma domain DepthDomain
#pragma fragment DepthFragment
struct DepthVaryings
{
float4 positionCS : SV_POSITION;
};
[domain("tri")]
DepthVaryings DepthDomain(TessFactors factors, OutputPatch<ControlPoint, 3> patch, float3 bary : SV_DomainLocation)
{
Attributes v = TessInterpolate(patch, bary);
DepthVaryings o;
o.positionCS = TransformObjectToHClip(v.positionOS.xyz);
return o;
}
half DepthFragment(DepthVaryings input) : SV_Target
{
return input.positionCS.z;
}
ENDHLSL
}
Pass
{
// Deferred+'s normals prepass draws ONLY this tag (the forward path draws both), see the
// PlayerCamoLit fix - geometric (displaced) normal is enough for SSAO/HTrace.
Name "DepthNormalsOnly"
Tags { "LightMode" = "DepthNormalsOnly" }
ZWrite On
Cull Back
HLSLPROGRAM
#pragma target 4.6
#pragma vertex TessVertex
#pragma hull TessHull
#pragma domain DepthNormalsDomain
#pragma fragment DepthNormalsFragment
// Same as URP Lit's DepthNormals pass: decals need the rendering-layers target.
#include_with_pragmas "Packages/com.unity.render-pipelines.universal/ShaderLibrary/RenderingLayers.hlsl"
struct DepthNormalsVaryings
{
float4 positionCS : SV_POSITION;
float3 normalWS : TEXCOORD0;
};
[domain("tri")]
DepthNormalsVaryings DepthNormalsDomain(TessFactors factors, OutputPatch<ControlPoint, 3> patch, float3 bary : SV_DomainLocation)
{
Attributes v = TessInterpolate(patch, bary);
DepthNormalsVaryings o;
o.positionCS = TransformObjectToHClip(v.positionOS.xyz);
o.normalWS = TransformObjectToWorldNormal(v.normalOS);
return o;
}
void DepthNormalsFragment(
DepthNormalsVaryings input
, out half4 outNormalWS : SV_Target0
#ifdef _WRITE_RENDERING_LAYERS
, out uint outRenderingLayers : SV_Target1
#endif
)
{
outNormalWS = half4(NormalizeNormalPerPixel(input.normalWS), 0);
#ifdef _WRITE_RENDERING_LAYERS
outRenderingLayers = EncodeMeshRenderingLayer();
#endif
}
ENDHLSL
}
Pass
{
// The project renders forward(+); the ONLY consumer of this pass is HTrace WSGI, which
// renders its thin GBuffer through the "UniversalGBuffer" tag and composites its traced
// irradiance from GBuffer0.rgb (albedo) / GBuffer1.a (occlusion) AFTER post-processing.
// Without it these pixels keep stale GBuffer data and get wrong injected GI (the cyan
// sky tint) - same failure class as the HeroCutout/PlayerCamo GBuffer fixes. Albedo is
// graded exactly like the forward pass (brightness/occlusion/contrast) so the injected
// indirect light matches the visible picture.
Name "GBuffer"
Tags { "LightMode" = "UniversalGBuffer" }
ZWrite On
ZTest LEqual
Cull Back
HLSLPROGRAM
#pragma target 4.6
#pragma exclude_renderers gles3 glcore
#pragma vertex TessVertex
#pragma hull TessHull
#pragma domain GBufferDomain
#pragma fragment GBufferFragment
#pragma multi_compile _ _MAIN_LIGHT_SHADOWS _MAIN_LIGHT_SHADOWS_CASCADE _MAIN_LIGHT_SHADOWS_SCREEN
#pragma multi_compile_fragment _ _REFLECTION_PROBE_BLENDING
#pragma multi_compile_fragment _ _REFLECTION_PROBE_BOX_PROJECTION
#pragma multi_compile_fragment _ _SHADOWS_SOFT _SHADOWS_SOFT_LOW _SHADOWS_SOFT_MEDIUM _SHADOWS_SOFT_HIGH
#pragma multi_compile_fragment _ _DBUFFER_MRT1 _DBUFFER_MRT2 _DBUFFER_MRT3
#pragma multi_compile_fragment _ _RENDER_PASS_ENABLED
#pragma multi_compile _ _CLUSTER_LIGHT_LOOP
#pragma multi_compile _ EVALUATE_SH_MIXED EVALUATE_SH_VERTEX
#include_with_pragmas "Packages/com.unity.render-pipelines.universal/ShaderLibrary/RenderingLayers.hlsl"
#pragma multi_compile _ LIGHTMAP_SHADOW_MIXING
#pragma multi_compile _ SHADOWS_SHADOWMASK
#pragma multi_compile _ DIRLIGHTMAP_COMBINED
#pragma multi_compile _ LIGHTMAP_ON
#pragma multi_compile_fragment _ LIGHTMAP_BICUBIC_SAMPLING
#pragma multi_compile_fragment _ REFLECTION_PROBE_ROTATION
#pragma multi_compile _ DYNAMICLIGHTMAP_ON
#pragma multi_compile _ USE_LEGACY_LIGHTMAPS
#pragma multi_compile_fragment _ _GBUFFER_NORMALS_OCT
#pragma multi_compile_fragment _ _SCREEN_SPACE_IRRADIANCE
#include_with_pragmas "Packages/com.unity.render-pipelines.universal/ShaderLibrary/ProbeVolumeVariants.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/GBufferOutput.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DBuffer.hlsl"
TEXTURE2D(_BaseMap); SAMPLER(sampler_BaseMap);
TEXTURE2D(_BumpMap); SAMPLER(sampler_BumpMap);
TEXTURE2D(_OcclusionMap); SAMPLER(sampler_OcclusionMap);
struct GBufferVaryings
{
float4 positionCS : SV_POSITION;
float2 uv : TEXCOORD0;
float3 positionWS : TEXCOORD1;
float3 normalWS : TEXCOORD2;
float4 tangentWS : TEXCOORD3; // w = bitangent sign
DECLARE_LIGHTMAP_OR_SH(staticLightmapUV, vertexSH, 4);
#ifdef DYNAMICLIGHTMAP_ON
float2 dynamicLightmapUV : TEXCOORD5;
#endif
#ifdef USE_APV_PROBE_OCCLUSION
float4 probeOcclusion : TEXCOORD6;
#endif
};
[domain("tri")]
GBufferVaryings GBufferDomain(TessFactors factors, OutputPatch<ControlPoint, 3> patch, float3 bary : SV_DomainLocation)
{
Attributes v = TessInterpolate(patch, bary);
VertexPositionInputs pos = GetVertexPositionInputs(v.positionOS.xyz);
VertexNormalInputs nrm = GetVertexNormalInputs(v.normalOS, v.tangentOS);
GBufferVaryings o = (GBufferVaryings)0;
o.positionCS = pos.positionCS;
o.positionWS = pos.positionWS;
o.normalWS = nrm.normalWS;
o.tangentWS = float4(nrm.tangentWS, v.tangentOS.w * GetOddNegativeScale());
o.uv = TRANSFORM_TEX(v.uv, _BaseMap);
OUTPUT_LIGHTMAP_UV(v.staticLightmapUV, unity_LightmapST, o.staticLightmapUV);
#ifdef DYNAMICLIGHTMAP_ON
o.dynamicLightmapUV = v.dynamicLightmapUV * unity_DynamicLightmapST.xy + unity_DynamicLightmapST.zw;
#endif
OUTPUT_SH4(pos.positionWS, o.normalWS, GetWorldSpaceNormalizeViewDir(pos.positionWS), o.vertexSH, o.probeOcclusion);
return o;
}
GBufferFragOutput GBufferFragment(GBufferVaryings input)
{
// Surface build mirrors ForwardFragment 1:1 (graded albedo, contrast'd occlusion).
half4 albedo = SAMPLE_TEXTURE2D(_BaseMap, sampler_BaseMap, input.uv) * _BaseColor;
half heightBr = SAMPLE_TEXTURE2D(_HeightMap, sampler_HeightMap, input.uv).r;
albedo.rgb *= lerp(1.0h, _Brightness, heightBr);
half3 normalTS = UnpackNormalScale(SAMPLE_TEXTURE2D(_BumpMap, sampler_BumpMap, input.uv), _BumpScale);
half occ = SAMPLE_TEXTURE2D(_OcclusionMap, sampler_OcclusionMap, input.uv).g;
occ = saturate((occ - 0.5h) * (1.0h + _OcclusionContrast) + 0.5h);
half occlusion = saturate(LerpWhiteTo(occ, _OcclusionStrength));
float sgn = input.tangentWS.w;
float3 bitangentWS = sgn * cross(input.normalWS, input.tangentWS.xyz);
half3x3 tbn = half3x3(input.tangentWS.xyz, bitangentWS, input.normalWS);
InputData inputData = (InputData)0;
inputData.positionWS = input.positionWS;
inputData.positionCS = input.positionCS;
inputData.normalWS = NormalizeNormalPerPixel(TransformTangentToWorld(normalTS, tbn));
inputData.viewDirectionWS = GetWorldSpaceNormalizeViewDir(input.positionWS);
inputData.normalizedScreenSpaceUV = GetNormalizedScreenSpaceUV(input.positionCS);
#if defined(_MAIN_LIGHT_SHADOWS_SCREEN)
inputData.shadowCoord = float4(inputData.normalizedScreenSpaceUV, 0, 1);
#else
inputData.shadowCoord = TransformWorldToShadowCoord(input.positionWS);
#endif
#if defined(_SCREEN_SPACE_IRRADIANCE)
inputData.bakedGI = SAMPLE_GI(_ScreenSpaceIrradiance, input.positionCS.xy);
#elif defined(DYNAMICLIGHTMAP_ON)
inputData.bakedGI = SAMPLE_GI(input.staticLightmapUV, input.dynamicLightmapUV, input.vertexSH, inputData.normalWS);
inputData.shadowMask = SAMPLE_SHADOWMASK(input.staticLightmapUV);
#elif !defined(LIGHTMAP_ON) && (defined(PROBE_VOLUMES_L1) || defined(PROBE_VOLUMES_L2))
inputData.bakedGI = SAMPLE_GI(input.vertexSH,
GetAbsolutePositionWS(inputData.positionWS),
inputData.normalWS,
inputData.viewDirectionWS,
input.positionCS.xy,
input.probeOcclusion,
inputData.shadowMask);
#else
inputData.bakedGI = SAMPLE_GI(input.staticLightmapUV, input.vertexSH, inputData.normalWS);
inputData.shadowMask = SAMPLE_SHADOWMASK(input.staticLightmapUV);
#endif
SurfaceData surfaceData = (SurfaceData)0;
surfaceData.albedo = saturate(albedo.rgb); // GBuffer0 is UNORM; HTrace multiplies GI by it
surfaceData.alpha = 1;
surfaceData.metallic = _Metallic;
surfaceData.smoothness = _Smoothness;
surfaceData.normalTS = normalTS;
surfaceData.occlusion = occlusion;
#if defined(_DBUFFER)
ApplyDecalToSurfaceData(input.positionCS, surfaceData, inputData);
#endif
BRDFData brdfData;
InitializeBRDFData(surfaceData.albedo, surfaceData.metallic, surfaceData.specular, surfaceData.smoothness, surfaceData.alpha, brdfData);
Light mainLight = GetMainLight(inputData.shadowCoord, inputData.positionWS, inputData.shadowMask);
MixRealtimeAndBakedGI(mainLight, inputData.normalWS, inputData.bakedGI, inputData.shadowMask);
half3 color = GlobalIllumination(brdfData, (BRDFData)0, 0,
inputData.bakedGI, surfaceData.occlusion, inputData.positionWS,
inputData.normalWS, inputData.viewDirectionWS, inputData.normalizedScreenSpaceUV);
return PackGBuffersBRDFData(brdfData, inputData, surfaceData.smoothness, color, surfaceData.occlusion);
}
ENDHLSL
}
}
FallBack "Universal Render Pipeline/Lit"
}
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