unity-tech-cn
/
ScriptableRenderPipeline
29
0
派生 3
代码 合并请求 版本发布
浏览代码

Merge remote-tracking branch 'refs/remotes/origin/Unity-2017.3' into Add-refraction-cubemap-support 

# Conflicts:

#	ScriptableRenderPipeline/HDRenderPipeline/Lighting/TilePass/TilePassLoop.hlsl
#	ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.hlsl
/Add-support-for-light-specular-color-tint
sebastienlagarde 7 年前
当前提交
e2537ce0
共有 2 个文件被更改，包括 181 次插入 和 134 次删除
  1. 48
      ScriptableRenderPipeline/HDRenderPipeline/Lighting/TilePass/TilePassLoop.hlsl
  2. 267
      ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.hlsl

48
ScriptableRenderPipeline/HDRenderPipeline/Lighting/TilePass/TilePassLoop.hlsl
查看文件


// This struct is define in the material. the Lightloop must not access it
// PostEvaluateBSDF call at the end will convert Lighting to diffuse and specular lighting
Lighting lighting;
ZERO_INITIALIZE(Lighting, lighting); // LightLoop is in charge of initializing the struct
AggregateLighting aggregateLighting;
ZERO_INITIALIZE(AggregateLighting, aggregateLighting); // LightLoop is in charge of initializing the struct
uint i = 0; // Declare once to avoid the D3D11 compiler warning.

{
EvaluateBSDF_Directional(context, V, posInput, preLightData, _DirectionalLightDatas[i], bsdfData, lighting);
DirectLighting lighting = EvaluateBSDF_Directional(context, V, posInput, preLightData, _DirectionalLightDatas[i], bsdfData);
AccumulateDirectLighting(lighting, aggregateLighting);
}
}

for (i = 0; i < punctualLightCount; ++i)
{
int punctualIndex = FetchIndex(punctualLightStart, i);
EvaluateBSDF_Punctual(context, V, posInput, preLightData, _LightDatas[punctualIndex], bsdfData, _LightDatas[punctualIndex].lightType, lighting);
DirectLighting lighting = EvaluateBSDF_Punctual(context, V, posInput, preLightData, _LightDatas[punctualIndex], bsdfData, _LightDatas[punctualIndex].lightType);
AccumulateDirectLighting(lighting, aggregateLighting);
}
#else

EvaluateBSDF_Punctual(context, V, posInput, preLightData, _LightDatas[i], bsdfData, _LightDatas[i].lightType, lighting);
DirectLighting lighting = EvaluateBSDF_Punctual(context, V, posInput, preLightData, _LightDatas[i], bsdfData, _LightDatas[i].lightType);
AccumulateDirectLighting(lighting, aggregateLighting);
}
#endif

while (i < areaLightCount && lightType == GPULIGHTTYPE_LINE)
{
EvaluateBSDF_Area(context, V, posInput, preLightData, _LightDatas[areaIndex], bsdfData, GPULIGHTTYPE_LINE, lighting);
DirectLighting lighting = EvaluateBSDF_Area(context, V, posInput, preLightData, _LightDatas[areaIndex], bsdfData, GPULIGHTTYPE_LINE);
AccumulateDirectLighting(lighting, aggregateLighting);
i++;
areaIndex = i < areaLightCount ? FetchIndex(areaLightStart, i) : 0;
lightType = i < areaLightCount ? _LightDatas[areaIndex].lightType : 0xFF;

{
EvaluateBSDF_Area(context, V, posInput, preLightData, _LightDatas[areaIndex], bsdfData, GPULIGHTTYPE_RECTANGLE, lighting);
DirectLighting lighting = EvaluateBSDF_Area(context, V, posInput, preLightData, _LightDatas[areaIndex], bsdfData, GPULIGHTTYPE_RECTANGLE);
AccumulateDirectLighting(lighting, aggregateLighting);
i++;
areaIndex = i < areaLightCount ? FetchIndex(areaLightStart, i) : 0;
lightType = i < areaLightCount ? _LightDatas[areaIndex].lightType : 0xFF;

for (i = _PunctualLightCount; i < _PunctualLightCount + _AreaLightCount; ++i)
{
EvaluateBSDF_Area(context, V, posInput, preLightData, _LightDatas[i], bsdfData, _LightDatas[i].lightType, lighting);
DirectLighting lighting = EvaluateBSDF_Area(context, V, posInput, preLightData, _LightDatas[i], bsdfData, _LightDatas[i].lightType);
AccumulateDirectLighting(lighting, aggregateLighting);
}
#endif

if (featureFlags & LIGHTFEATUREFLAGS_SSREFRACTION)
{
EvaluateBSDF_SSRefraction(context, V, posInput, preLightData, bsdfData, lighting, refractionHierarchyWeight);
IndirectLighting lighting = EvaluateBSDF_SSRefraction(context, V, posInput, preLightData, bsdfData, refractionHierarchyWeight);
AccumulateIndirectLighting(lighting, aggregateLighting);
EvaluateBSDF_SSReflection(context, V, posInput, preLightData, bsdfData, lighting, reflectionHierarchyWeight);
IndirectLighting lighting = EvaluateBSDF_SSReflection(context, V, posInput, preLightData, bsdfData, reflectionHierarchyWeight);
AccumulateIndirectLighting(lighting, aggregateLighting);
}
if (featureFlags & LIGHTFEATUREFLAGS_ENV || featureFlags & LIGHTFEATUREFLAGS_SKY)

#else
uint envLightIndex = i;
#endif
EvaluateBSDF_Env( context, V, posInput, preLightData, _EnvLightDatas[envLightIndex], bsdfData, _EnvLightDatas[envLightIndex].envShapeType,
GPUIMAGEBASEDLIGHTINGTYPE_REFLECTION, lighting, reflectionHierarchyWeight);
IndirectLighting lighting = EvaluateBSDF_Env( context, V, posInput, preLightData, _EnvLightDatas[envLightIndex], bsdfData, _EnvLightDatas[envLightIndex].envShapeType,
GPUIMAGEBASEDLIGHTINGTYPE_REFLECTION, reflectionHierarchyWeight);
AccumulateIndirectLighting(lighting, aggregateLighting);
}
// Refraction probe and reflection probe will process exactly the same weight. It will be good for performance to be able to share this computation

#else
uint envLightIndex = i;
#endif
EvaluateBSDF_Env( context, V, posInput, preLightData, _EnvLightDatas[envLightIndex], bsdfData, _EnvLightDatas[envLightIndex].envShapeType,
GPUIMAGEBASEDLIGHTINGTYPE_REFRACTION, lighting, refractionHierarchyWeight);
IndirectLighting lighting = EvaluateBSDF_Env( context, V, posInput, preLightData, _EnvLightDatas[envLightIndex], bsdfData, _EnvLightDatas[envLightIndex].envShapeType,
GPUIMAGEBASEDLIGHTINGTYPE_REFRACTION, reflectionHierarchyWeight);
AccumulateIndirectLighting(lighting, aggregateLighting);
}
}
}

// The sky is a single cubemap texture separate from the reflection probe texture array (different resolution and compression)
context.sampleReflection = SINGLE_PASS_CONTEXT_SAMPLE_SKY;
EnvLightData envLightSky = InitSkyEnvLightData(0); // The sky data are generated on the fly so the compiler can optimize the code
EvaluateBSDF_Env(context, V, posInput, preLightData, envLightSky, bsdfData, ENVSHAPETYPE_SKY, GPUIMAGEBASEDLIGHTINGTYPE_REFLECTION, lighting, reflectionHierarchyWeight);
IndirectLighting lighting = EvaluateBSDF_Env(context, V, posInput, preLightData, envLightSky, bsdfData, ENVSHAPETYPE_SKY, GPUIMAGEBASEDLIGHTINGTYPE_REFLECTION, reflectionHierarchyWeight);
AccumulateIndirectLighting(lighting, aggregateLighting);
}
if (featureFlags & LIGHTFEATUREFLAGS_SSREFRACTION)

// The sky is a single cubemap texture separate from the reflection probe texture array (different resolution and compression)
context.sampleReflection = SINGLE_PASS_CONTEXT_SAMPLE_SKY;
EnvLightData envLightSky = InitSkyEnvLightData(0); // The sky data are generated on the fly so the compiler can optimize the code
EvaluateBSDF_Env(context, V, posInput, preLightData, envLightSky, bsdfData, ENVSHAPETYPE_SKY, GPUIMAGEBASEDLIGHTINGTYPE_REFRACTION, lighting, refractionHierarchyWeight);
IndirectLighting lighting = EvaluateBSDF_Env(context, V, posInput, preLightData, envLightSky, bsdfData, ENVSHAPETYPE_SKY, GPUIMAGEBASEDLIGHTINGTYPE_REFRACTION, reflectionHierarchyWeight);
AccumulateIndirectLighting(lighting, aggregateLighting);
}
}
}

// PostEvaluateBSDF will perform any operation wanted by the material and sum everything into diffuseLighting and specularLighting
PostEvaluateBSDF( context, V, posInput, preLightData, bsdfData, bakeDiffuseLighting, lighting,
PostEvaluateBSDF( context, V, posInput, preLightData, bsdfData, bakeDiffuseLighting, aggregateLighting,
diffuseLighting, specularLighting);
ApplyDebug(context, posInput.positionWS, diffuseLighting, specularLighting);

267
ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.hlsl
查看文件


#ifdef HAS_LIGHTLOOP
//-----------------------------------------------------------------------------
//
// Lighting structure for light accumulation
// This structure allow to accumulate lighting accross the Lit material
// It is init to zero and transfer by the LightLoop, but the LightLoop can't access its content.
struct Lighting
// These structure allow to accumulate lighting accross the Lit material
// AggregateLighting is init to zero and transfer to EvaluateBSDF, but the LightLoop can't access its content.
struct DirectLighting
float3 directDiffuse;
float3 directSpecular;
float3 refraction;
float3 envSpecular;
float3 diffuse;
float3 specular;
struct IndirectLighting
{
float3 specularReflected;
float3 specularTransmitted;
};
struct AggregateLighting
{
DirectLighting direct;
IndirectLighting indirect;
};
void AccumulateDirectLighting(DirectLighting src, inout AggregateLighting dst)
{
dst.direct.diffuse += src.diffuse;
dst.direct.specular += src.specular;
}
void AccumulateIndirectLighting(IndirectLighting src, inout AggregateLighting dst)
{
dst.indirect.specularReflected += src.specularReflected;
dst.indirect.specularTransmitted += src.specularTransmitted;
}
//-----------------------------------------------------------------------------
// BSDF share between directional light, punctual light and area light (reference)

return cookie;
}
void EvaluateBSDF_Directional(LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput, PreLightData preLightData,
DirectionalLightData lightData, BSDFData bsdfData,
inout Lighting lighting)
DirectLighting EvaluateBSDF_Directional( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput, PreLightData preLightData,
DirectionalLightData lightData, BSDFData bsdfData)
DirectLighting lighting;
ZERO_INITIALIZE(DirectLighting, lighting);
float3 positionWS = posInput.positionWS;
float3 L = -lightData.forward; // Lights are pointing backward in Unity

float3 diffuseLighting = float3(0, 0, 0);
float3 specularLighting = float3(0, 0, 0);
float shadow = 1;
float shadow = 1.0;
[branch] if (lightData.shadowIndex >= 0)
{

[branch] if (illuminance > 0.0)
{
BSDF(V, L, positionWS, preLightData, bsdfData, diffuseLighting, specularLighting);
BSDF(V, L, positionWS, preLightData, bsdfData, lighting.diffuse, lighting.specular);
diffuseLighting *= illuminance * lightData.diffuseScale;
specularLighting *= illuminance * lightData.specularScale;
lighting.diffuse *= illuminance * lightData.diffuseScale;
lighting.specular *= illuminance * lightData.specularScale;
}
[branch] if (bsdfData.enableTransmission)

float illuminance = Lambert() * ComputeWrappedDiffuseLighting(-NdotL, SSS_WRAP_LIGHT);
// We use diffuse lighting for accumulation since it is going to be blurred during the SSS pass.
diffuseLighting += EvaluateTransmission(bsdfData, illuminance * lightData.diffuseScale, shadow);
lighting.diffuse += EvaluateTransmission(bsdfData, illuminance * lightData.diffuseScale, shadow);
diffuseLighting *= lightData.color;
specularLighting *= lightData.color;
lighting.diffuse *= lightData.color;
lighting.specular *= lightData.color;
lighting.directDiffuse += diffuseLighting;
lighting.directSpecular += specularLighting;
return lighting;
}
//-----------------------------------------------------------------------------

return attenuation * GetAngleAttenuation(L, -lightData.forward, lightData.angleScale, lightData.angleOffset);
}
void EvaluateBSDF_Punctual( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData, int GPULightType,
inout Lighting lighting)
DirectLighting EvaluateBSDF_Punctual( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData, int GPULightType)
DirectLighting lighting;
ZERO_INITIALIZE(DirectLighting, lighting);
float3 positionWS = posInput.positionWS;
int lightType = GPULightType;

lightData.diffuseScale *= attenuation;
lightData.specularScale *= attenuation;
float3 diffuseLighting = float3(0.0, 0.0, 0.0);
float3 specularLighting = float3(0.0, 0.0, 0.0);
float shadow = 1.0;
[branch] if (lightData.shadowIndex >= 0)

[branch] if (illuminance > 0.0)
{
bsdfData.roughness = max(bsdfData.roughness, lightData.minRoughness); // Simulate that a punctual ligth have a radius with this hack
BSDF(V, L, positionWS, preLightData, bsdfData, diffuseLighting, specularLighting);
bsdfData.roughness = max(bsdfData.roughness, lightData.minRoughness); // Simulate that a punctual light have a radius with this hack
BSDF(V, L, positionWS, preLightData, bsdfData, lighting.diffuse, lighting.specular);
diffuseLighting *= illuminance * lightData.diffuseScale;
specularLighting *= illuminance * lightData.specularScale;
lighting.diffuse *= illuminance * lightData.diffuseScale;
lighting.specular *= illuminance * lightData.specularScale;
}
[branch] if (bsdfData.enableTransmission)

float illuminance = Lambert() * ComputeWrappedDiffuseLighting(-NdotL, SSS_WRAP_LIGHT);
// We use diffuse lighting for accumulation since it is going to be blurred during the SSS pass.
diffuseLighting += EvaluateTransmission(bsdfData, illuminance * lightData.diffuseScale, shadow);
lighting.diffuse += EvaluateTransmission(bsdfData, illuminance * lightData.diffuseScale, shadow);
diffuseLighting *= lightData.color;
specularLighting *= lightData.color;
lighting.diffuse *= lightData.color;
lighting.specular *= lightData.color;
lighting.directDiffuse += diffuseLighting;
lighting.directSpecular += specularLighting;
return lighting;
}
#include "LitReference.hlsl"

//-----------------------------------------------------------------------------
void EvaluateBSDF_Line(LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData,
inout Lighting lighting)
DirectLighting EvaluateBSDF_Line( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData)
DirectLighting lighting;
ZERO_INITIALIZE(DirectLighting, lighting);
float3 diffuseLighting = float3(0.0, 0.0, 0.0);
float3 specularLighting = float3(0.0, 0.0, 0.0);
diffuseLighting, specularLighting);
lighting.diffuse, lighting.specular);
#else
float len = lightData.size.x;
float3 T = lightData.right;

axis, invAspectRatio);
// Terminate if the shaded point is too far away.
if (intensity == 0.0) return;
if (intensity == 0.0)
return lighting;
lightData.diffuseScale *= intensity;
lightData.specularScale *= intensity;

{
ltcValue = LTCEvaluate(P1, P2, B, preLightData.ltcTransformDiffuse);
ltcValue *= lightData.diffuseScale;
diffuseLighting = bsdfData.diffuseColor * (preLightData.ltcMagnitudeDiffuse * ltcValue);
lighting.diffuse = bsdfData.diffuseColor * (preLightData.ltcMagnitudeDiffuse * ltcValue);
}
[branch] if (bsdfData.enableTransmission)

ltcValue *= lightData.diffuseScale;
// We use diffuse lighting for accumulation since it is going to be blurred during the SSS pass.
diffuseLighting += EvaluateTransmission(bsdfData, ltcValue, 1);
lighting.diffuse += EvaluateTransmission(bsdfData, ltcValue, 1);
}
// Evaluate the coat part

{
ltcValue = LTCEvaluate(P1, P2, B, preLightData.ltcTransformSpecular);
ltcValue *= lightData.specularScale;
specularLighting += preLightData.ltcMagnitudeFresnel * ltcValue;
lighting.specular += preLightData.ltcMagnitudeFresnel * ltcValue;
diffuseLighting *= lightData.color;
specularLighting *= lightData.color;
lighting.diffuse *= lightData.color;
lighting.specular *= lightData.color;
lighting.directDiffuse += diffuseLighting;
lighting.directSpecular += specularLighting;
return lighting;
}
//-----------------------------------------------------------------------------

// #define ELLIPSOIDAL_ATTENUATION
void EvaluateBSDF_Rect( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData,
inout Lighting lighting)
DirectLighting EvaluateBSDF_Rect( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData)
DirectLighting lighting;
ZERO_INITIALIZE(DirectLighting, lighting);
float3 diffuseLighting = float3(0.0, 0.0, 0.0);
float3 specularLighting = float3(0.0, 0.0, 0.0);
diffuseLighting, specularLighting);
lighting.diffuse, lighting.specular);
#else
float3 unL = lightData.positionWS - positionWS;

// The light is back-facing.
return;
return lighting;
}
// Rotate the light direction into the light space.

#endif
// Terminate if the shaded point is too far away.
if (intensity == 0.0) return;
if (intensity == 0.0)
return lighting;
lightData.diffuseScale *= intensity;
lightData.specularScale *= intensity;

// Polygon irradiance in the transformed configuration.
ltcValue = PolygonIrradiance(mul(lightVerts, preLightData.ltcTransformDiffuse));
ltcValue *= lightData.diffuseScale;
diffuseLighting = bsdfData.diffuseColor * (preLightData.ltcMagnitudeDiffuse * ltcValue);
lighting.diffuse = bsdfData.diffuseColor * (preLightData.ltcMagnitudeDiffuse * ltcValue);
}
[branch] if (bsdfData.enableTransmission)

ltcValue *= lightData.diffuseScale;
// We use diffuse lighting for accumulation since it is going to be blurred during the SSS pass.
diffuseLighting += EvaluateTransmission(bsdfData, ltcValue, 1);
lighting.diffuse += EvaluateTransmission(bsdfData, ltcValue, 1);
}
// Evaluate the coat part

// ltcValue = LTCEvaluate(lightVerts, V, bsdfData.coatNormalWS, preLightData.coatNdotV, preLightData.ltcXformClearCoat);
// specularLighting = preLightData.ltcClearCoatFresnelTerm * (ltcValue * bsdfData.coatCoverage);
// lighting.specular = preLightData.ltcClearCoatFresnelTerm * (ltcValue * bsdfData.coatCoverage);
// modify matL value based on Fresnel transmission
// matL = mul(matL, preLightData.ltcCoatT);

// Polygon irradiance in the transformed configuration.
ltcValue = PolygonIrradiance(mul(lightVerts, preLightData.ltcTransformSpecular));
ltcValue *= lightData.specularScale;
specularLighting += preLightData.ltcMagnitudeFresnel * ltcValue;
lighting.specular += preLightData.ltcMagnitudeFresnel * ltcValue;
diffuseLighting *= lightData.color;
specularLighting *= lightData.color;
lighting.diffuse *= lightData.color;
lighting.specular *= lightData.color;
lighting.directDiffuse += diffuseLighting;
lighting.directSpecular += specularLighting;
return lighting;
void EvaluateBSDF_Area( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData, int GPULightType,
inout Lighting lighting)
DirectLighting EvaluateBSDF_Area( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData, int GPULightType)
EvaluateBSDF_Line(lightLoopContext, V, posInput, preLightData, lightData, bsdfData, lighting);
return EvaluateBSDF_Line(lightLoopContext, V, posInput, preLightData, lightData, bsdfData);
EvaluateBSDF_Rect(lightLoopContext, V, posInput, preLightData, lightData, bsdfData, lighting);
return EvaluateBSDF_Rect(lightLoopContext, V, posInput, preLightData, lightData, bsdfData);
}
}

void EvaluateBSDF_SSReflection( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, BSDFData bsdfData,
inout Lighting lighting, inout float hierarchyWeight)
IndirectLighting EvaluateBSDF_SSReflection(LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, BSDFData bsdfData,
inout float hierarchyWeight)
IndirectLighting lighting;
ZERO_INITIALIZE(IndirectLighting, lighting);
return lighting;
void EvaluateBSDF_SSRefraction( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, BSDFData bsdfData,
inout Lighting lighting, inout float hierarchyWeight)
IndirectLighting EvaluateBSDF_SSRefraction(LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, BSDFData bsdfData,
inout float hierarchyWeight)
IndirectLighting lighting;
ZERO_INITIALIZE(IndirectLighting, lighting);
#if HAS_REFRACTION
// Refraction process:
// 1. Depending on the shape model, we calculate the refracted point in world space and the optical depth

// b. Multiply by the transmittance for absorption (depends on the optical depth)
float3 diffuseLighting = float3(0.0, 0.0, 0.0);
float3 refractedBackPointWS = float3(0.0, 0.0, 0.0);
float opticalDepth = 0.0;

|| any(refractedBackPointSS > 1.0))
{
// Do nothing and don't update the hierarchy weight so we can fall back on refraction probe
return;
return lighting;
diffuseLighting = SAMPLE_TEXTURE2D_LOD(_GaussianPyramidColorTexture, s_trilinear_clamp_sampler, refractedBackPointSS, mipLevel).rgb;
lighting.specularTransmitted = SAMPLE_TEXTURE2D_LOD(_GaussianPyramidColorTexture, s_trilinear_clamp_sampler, refractedBackPointSS, mipLevel).rgb;
diffuseLighting *= transmittance;
lighting.specularTransmitted *= transmittance;
UpdateLightingHierarchyWeights(hierarchyWeight, weight);
lighting.refraction += diffuseLighting * weight;
UpdateLightingHierarchyWeights(hierarchyWeight, weight); // Shouldn't be needed, but safer in case we decide to change hiearchy priority
lighting.specularTransmitted *= weight;
return lighting;
}
//-----------------------------------------------------------------------------

// _preIntegratedFGD and _CubemapLD are unique for each BRDF
void EvaluateBSDF_Env( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, EnvLightData lightData, BSDFData bsdfData, int envShapeType, int GPUImageBasedLightingType,
inout Lighting lighting, inout float hierarchyWeight)
IndirectLighting EvaluateBSDF_Env( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, EnvLightData lightData, BSDFData bsdfData, int envShapeType, int GPUImageBasedLightingType,
inout float hierarchyWeight)
IndirectLighting lighting;
ZERO_INITIALIZE(IndirectLighting, lighting);
return ;
return lighting;
float3 envLighting = float3(0.0, 0.0, 0.0);
float3 specularLighting = float3(0.0, 0.0, 0.0);
specularLighting = IntegrateSpecularGGXIBLRef(lightLoopContext, V, preLightData, lightData, bsdfData);
envLighting = IntegrateSpecularGGXIBLRef(lightLoopContext, V, preLightData, lightData, bsdfData);
/*
#ifdef LIT_DIFFUSE_LAMBERT_BRDF
lighting.directDiffuse += IntegrateLambertIBLRef(lightData, V, bsdfData);
#else
lighting.directDiffuse += IntegrateDisneyDiffuseIBLRef(lightLoopContext, V, preLightData, lightData, bsdfData);
#endif
*/
hierarchyWeight = 0.0;
// TODO: Do refraction reference (is it even possible ?)
// #ifdef LIT_DIFFUSE_LAMBERT_BRDF
// envLighting += IntegrateLambertIBLRef(lightData, V, bsdfData);
// #else
// envLighting += IntegrateDisneyDiffuseIBLRef(lightLoopContext, V, preLightData, lightData, bsdfData);
// #endif
weight = 1.0;
#else

// Evaluate the Clear Coat color
float4 preLD = SampleEnv(lightLoopContext, lightData.envIndex, coatR, 0.0);
specularLighting += F * preLD.rgb * bsdfData.coatCoverage;
envLighting += F * preLD.rgb * bsdfData.coatCoverage;
// Change the Fresnel term to account for transmission through Clear Coat and reflection on the base layer.
F = Sqr(-F * bsdfData.coatCoverage + 1.0);

specularLighting += F * preLD.rgb * preLightData.specularFGD;
envLighting += F * preLD.rgb * preLightData.specularFGD;
#endif

lighting.envSpecular += specularLighting * weight;
lighting.specularReflected = envLighting * weight;
lighting.refraction += specularLighting * weight;
lighting.specularTransmitted = envLighting * weight;
return lighting;
}
//-----------------------------------------------------------------------------

void PostEvaluateBSDF( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, BSDFData bsdfData, float3 bakeDiffuseLighting, Lighting lighting,
PreLightData preLightData, BSDFData bsdfData, float3 bakeDiffuseLighting, AggregateLighting lighting,
out float3 diffuseLighting, out float3 specularLighting)
{
// Use GTAOMultiBounce approximation for ambient occlusion (allow to get a tint from the baseColor)

// Try to mimic multibounce with specular color. Not the point of the original formula but ok result.
// Take the min of screenspace specular occlusion and visibility cone specular occlusion
#if GTAO_MULTIBOUNCE_APPROX
lighting.envSpecular *= GTAOMultiBounce(min(bsdfData.specularOcclusion, specularOcclusion), bsdfData.fresnel0);
lighting.indirect.specularReflected *= GTAOMultiBounce(min(bsdfData.specularOcclusion, specularOcclusion), bsdfData.fresnel0);
lighting.envSpecular *= lerp(_AmbientOcclusionParam.rgb, float3(1.0, 1.0, 1.0), min(bsdfData.specularOcclusion, specularOcclusion));
lighting.indirect.specularReflected *= lerp(_AmbientOcclusionParam.rgb, float3(1.0, 1.0, 1.0), min(bsdfData.specularOcclusion, specularOcclusion));
lighting.directDiffuse *=
lighting.direct.diffuse *=
#if GTAO_MULTIBOUNCE_APPROX
GTAOMultiBounce(directAmbientOcclusion, bsdfData.diffuseColor);
#else

diffuseLighting = lighting.directDiffuse + bakeDiffuseLighting;
diffuseLighting = lighting.direct.diffuse + bakeDiffuseLighting;
// Physically speaking, it should be transmittanceMask should be 1, but for artistic reasons, we let the value varie
// Physically speaking, it should be transmittanceMask should be 1, but for artistic reasons, we let the value vary
diffuseLighting = lerp(diffuseLighting, lighting.refraction, bsdfData.transmittanceMask);
diffuseLighting = lerp(diffuseLighting, lighting.indirect.specularTransmitted, bsdfData.transmittanceMask);
specularLighting = lighting.directSpecular + lighting.envSpecular;
specularLighting = lighting.direct.specular + lighting.indirect.specularReflected;
// Rescale the GGX to account for the multiple scattering.
specularLighting *= 1.0 + bsdfData.fresnel0 * preLightData.energyCompensation;

撰写 预览
正在加载...
取消
保存