Code Cleanup;
This commit is contained in:
Misaki
308
Runtime/HDRP/Shaders/Includes/Lighting/UtsLightEvaluation.hlsl
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308
Runtime/HDRP/Shaders/Includes/Lighting/UtsLightEvaluation.hlsl
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#ifndef UTS_LIGHT_EVALUATION
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#define UTS_LIGHT_EVALUATION
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#if FP_BUFFER
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#define SATURATE_IF_SDR(x) (x)
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#define SATURATE_BASE_COLOR_IF_SDR(x) (x)
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#else
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#define SATURATE_IF_SDR(x) saturate(x)
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#define SATURATE_BASE_COLOR_IF_SDR(x) saturate(x)
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#endif
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#define APPLY_WEIGHT(x, y, t) lerp(x, x * y, t)
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// not in materials
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int _ToonLightHiCutFilter;
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int _ToonEvAdjustmentCurve;
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float _ToonEvAdjustmentValueArray[128];
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float _ToonEvAdjustmentValueMin;
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float _ToonEvAdjustmentValueMax;
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float _ToonEvAdjustmentCompensation;
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float _ToonIgnoreExposureMultiplier;
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struct UTSLightData
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{
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float3 lightDirection;
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float3 lightColor;
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float diffuseDimmer;
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float specularDimmer;
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float3 shadowTint;
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float penumbraTint;
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SHADOW_TYPE shadowValue;
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};
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float3 ApplyCurrentExposureMultiplier(float3 color)
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{
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return color * lerp(GetCurrentExposureMultiplier(), 1, _ToonIgnoreExposureMultiplier);
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}
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float3 AccumulateUTSAggregateLighting(AggregateLighting aggregateLighting, UtsBSDFData bsdfData)
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{
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float3 directLighting = aggregateLighting.direct.diffuse + aggregateLighting.direct.specular;
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float3 indirectLighting = ApplyCurrentExposureMultiplier(aggregateLighting.indirect.specularReflected * bsdfData.fresnel0 * _IR_Intensity + aggregateLighting.indirect.specularTransmitted * bsdfData.diffuseColor * _ID_Intensity);
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return SATURATE_IF_SDR(directLighting + indirectLighting);
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}
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float3 ConvertFromEV100(float3 EV100)
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{
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float3 value = pow(2, EV100) * 2.5f;
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return value;
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}
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float3 ConvertToEV100(float3 value)
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{
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return log2(value * 0.4f);
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}
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float WeightSample(PositionInputs positionInput)
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{
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// Center-weighted
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const float2 kCenter = _ScreenParams.xy * 0.5;
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const float weight = pow(length((kCenter.xy - positionInput.positionSS.xy) / _ScreenParams.xy), 1.0);
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return 1.0 - saturate(weight);
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}
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float3 ApplyCompensation(float3 originalColor)
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{
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float3 ev100_Color = ConvertToEV100(originalColor) + _ToonEvAdjustmentCompensation * 0.5f;
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float3 resultColor = max(0, ConvertFromEV100(ev100_Color));
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return resultColor;
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}
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float3 GetExposureAdjustedColor(float3 originalColor)
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{
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if (_ToonEvAdjustmentCurve != 0)
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{
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float3 ev100_Color = ConvertToEV100(originalColor);
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ev100_Color = clamp(ev100_Color, _ToonEvAdjustmentValueMin, _ToonEvAdjustmentValueMax);
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float3 ev100_remap = (ev100_Color - _ToonEvAdjustmentValueMin) * (128 - 1) / (_ToonEvAdjustmentValueMax - _ToonEvAdjustmentValueMin);
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ev100_remap = clamp(ev100_remap, 0.0, 127.0);
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int3 ev100_idx = (int3) ev100_remap;
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float3 ev100_lerp = ev100_remap - ev100_idx;
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float3 ev100_remapped;
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ev100_remapped.r = _ToonEvAdjustmentValueArray[ev100_idx.r] + (_ToonEvAdjustmentValueArray[ev100_idx.r + 1] - _ToonEvAdjustmentValueArray[ev100_idx.r]) * ev100_lerp.r;
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ev100_remapped.g = _ToonEvAdjustmentValueArray[ev100_idx.g] + (_ToonEvAdjustmentValueArray[ev100_idx.g + 1] - _ToonEvAdjustmentValueArray[ev100_idx.g]) * ev100_lerp.g;
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ev100_remapped.b = _ToonEvAdjustmentValueArray[ev100_idx.b] + (_ToonEvAdjustmentValueArray[ev100_idx.b + 1] - _ToonEvAdjustmentValueArray[ev100_idx.b]) * ev100_lerp.b;
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float3 resultColor = ConvertFromEV100(ev100_remapped);
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return resultColor;
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}
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else // else is neccessary to avoid warrnings.
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{
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return originalColor;
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}
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}
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float GetLightAttenuation(float3 lightColor)
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{
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float lightAttenuation = rateR * lightColor.r + rateG * lightColor.g + rateB * lightColor.b;
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return lightAttenuation;
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}
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float3 GetLimitedLightColor(float3 lightColor)
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{
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lightColor = ApplyCurrentExposureMultiplier(lightColor);
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float3 result = lerp(lightColor, saturate(lightColor), _Is_Filter_LightColor);
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return result;
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}
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IndirectLighting UtsEvaluateBSDF_ScreenSpaceReflection(PositionInputs posInput, PreLightData preLightData, inout float reflectionHierarchyWeight)
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{
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IndirectLighting lighting;
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ZERO_INITIALIZE(IndirectLighting, lighting);
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// TODO: this texture is sparse (mostly black). Can we avoid reading every texel? How about using Hi-S?
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float4 ssrLighting = LOAD_TEXTURE2D_X(_SsrLightingTexture, posInput.positionSS);
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InversePreExposeSsrLighting(ssrLighting);
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// Apply the weight on the ssr contribution (if required)
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ApplyScreenSpaceReflectionWeight(ssrLighting);
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reflectionHierarchyWeight = ssrLighting.a;
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lighting.specularReflected = ssrLighting.rgb * preLightData.specularFGD;
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return lighting;
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}
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void UtsEvaluateBSDF_BakeDiffuse(PositionInputs posInput, PreLightData preLightData, UtsBSDFData bsdfData, float3 V, inout BuiltinData builtinData, out float3 lightInReflDir)
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{
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lightInReflDir = 0.0;
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#if defined(PROBE_VOLUMES_L1) || defined(PROBE_VOLUMES_L2)
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lightInReflDir = float3(-1, -1, -1); // This variable is used with APV for reflection probe normalization - see code for LIGHTFEATUREFLAGS_ENV
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#endif
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#if !defined(_SURFACE_TYPE_TRANSPARENT) && !defined(SCREEN_SPACE_INDIRECT_DIFFUSE_DISABLED)
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if (_IndirectDiffuseMode != INDIRECTDIFFUSEMODE_OFF)
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{
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builtinData.bakeDiffuseLighting = LOAD_TEXTURE2D_X(_IndirectDiffuseTexture, posInput.positionSS).xyz * GetInverseCurrentExposureMultiplier();
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}
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else
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#endif
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{
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#if defined(PROBE_VOLUMES_L1) || defined(PROBE_VOLUMES_L2)
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if (_EnableProbeVolumes)
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{
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// Reflect normal to get lighting for reflection probe tinting
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float3 R = reflect(-V, bsdfData.normalWS);
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#if defined(_PBR_Mode_OFF) || defined(_PBR_Mode_TOON)
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float3 normalWS = 0.0;
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float3 backNormalWS = 0.0;
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#else
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float3 normalWS = bsdfData.normalWS;
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float3 backNormalWS = -bsdfData.normalWS;
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#endif
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EvaluateAdaptiveProbeVolume(GetAbsolutePositionWS(posInput.positionWS),
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bsdfData.normalWS, -bsdfData.normalWS,
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R, V,
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posInput.positionSS, builtinData.renderingLayers,
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builtinData.bakeDiffuseLighting, builtinData.backBakeDiffuseLighting, lightInReflDir);
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}
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else // If probe volume is disabled we fallback on the ambient probes
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{
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builtinData.bakeDiffuseLighting = EvaluateAmbientProbe(bsdfData.normalWS);
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builtinData.backBakeDiffuseLighting = EvaluateAmbientProbe(-bsdfData.normalWS);
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}
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#endif
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}
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}
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void UtsEvaluateMatCap(PositionInputs posInput, UtsBSDFData bsdfData, float perceptualRoughness, inout BuiltinData builtinData)
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{
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float3 positionVS = mul(UNITY_MATRIX_V, float4(posInput.positionWS, 1.0)).xyz;
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float3 normalVS = mul(UNITY_MATRIX_V, float4(bsdfData.normalWS, 1.0)).xyz;
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float3 PcrossN = cross(normalize(positionVS), normalVS);
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float2 uv = PcrossN.yx;
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uv.x *= -1;
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uv = uv * 0.5 + 0.5;
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builtinData.bakeDiffuseLighting = SAMPLE_TEXTURE2D_LOD(_MatCapMap, s_linear_clamp_sampler, uv, PerceptualRoughnessToMipmapLevel(perceptualRoughness)).rgb * GetInverseCurrentExposureMultiplier();
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}
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void UtsEvaluateRamp(PositionInputs posInput, UtsBSDFData bsdfData, inout BuiltinData builtinData)
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{
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}
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IndirectLighting UtsEvaluateBSDF_Env(LightLoopContext lightLoopContext, PositionInputs posInput, PreLightData preLightData, EnvLightData lightData, UtsBSDFData bsdfData, int influenceShapeType, int GPUImageBasedLightingType, inout float hierarchyWeight)
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{
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IndirectLighting lighting;
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ZERO_INITIALIZE(IndirectLighting, lighting);
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if (GPUImageBasedLightingType == GPUIMAGEBASEDLIGHTINGTYPE_REFRACTION)
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{
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return lighting;
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}
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float3 envLighting;
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float3 positionWS = posInput.positionWS;
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float weight = 1.0;
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float3 R = preLightData.iblR;
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if (!IsEnvIndexTexture2D(lightData.envIndex)) // ENVCACHETYPE_CUBEMAP
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{
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R = GetSpecularDominantDir(bsdfData.normalWS, R, preLightData.iblPerceptualRoughness, ClampNdotV(preLightData.NdotV));
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// When we are rough, we tend to see outward shifting of the reflection when at the boundary of the projection volume
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// Also it appear like more sharp. To avoid these artifact and at the same time get better match to reference we lerp to original unmodified reflection.
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// Formula is empirical.
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float roughness = PerceptualRoughnessToRoughness(preLightData.iblPerceptualRoughness);
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R = lerp(R, preLightData.iblR, saturate(smoothstep(0, 1, roughness * roughness)));
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}
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// Note: using influenceShapeType and projectionShapeType instead of (lightData|proxyData).shapeType allow to make compiler optimization in case the type is know (like for sky)
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float intersectionDistance = EvaluateLight_EnvIntersection(positionWS, bsdfData.normalWS, lightData, influenceShapeType, R, weight);
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// Don't do clear coating for refraction
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float3 coatR = preLightData.coatIblR;
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if (GPUImageBasedLightingType == GPUIMAGEBASEDLIGHTINGTYPE_REFLECTION && HasFlag(bsdfData.materialFeatures, MATERIALFEATUREFLAGS_LIT_CLEAR_COAT))
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{
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float unusedWeight = 0.0;
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EvaluateLight_EnvIntersection(positionWS, bsdfData.normalWS, lightData, influenceShapeType, coatR, unusedWeight);
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}
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float3 F = preLightData.specularFGD;
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float4 preLD = SampleEnvWithDistanceBaseRoughness(lightLoopContext, posInput, lightData, R, preLightData.iblPerceptualRoughness, intersectionDistance);
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weight *= preLD.a; // Used by planar reflection to discard pixel
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if (GPUImageBasedLightingType == GPUIMAGEBASEDLIGHTINGTYPE_REFLECTION)
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{
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envLighting = F * preLD.rgb;
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// Apply the main lobe weight and update main reflection hierarchyWeight:
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UpdateLightingHierarchyWeights(hierarchyWeight, weight);
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envLighting *= weight;
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}
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envLighting *= lightData.multiplier;
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if (GPUImageBasedLightingType == GPUIMAGEBASEDLIGHTINGTYPE_REFLECTION)
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{
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lighting.specularReflected = envLighting;
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}
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return lighting;
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}
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DirectLighting UtsEvaluateShading_Directional(LightLoopContext lightLoopContext, PositionInputs posInput, BuiltinData builtinData, DirectionalLightData lightData, UtsBSDFData bsdfData, float3 V)
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{
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DirectLighting lighting;
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ZERO_INITIALIZE(DirectLighting, lighting);
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float3 L = - lightData.forward;
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float NdotL = dot(bsdfData.normalWS, L);
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float halfLambert = 0.5 * NdotL + 0.5;
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SHADOW_TYPE shadow = EvaluateShadow_Directional(lightLoopContext, posInput, lightData, builtinData, bsdfData.normalWS);
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float systemShadows = saturate(shadow + 0.5f + _Tweak_SystemShadowsLevel > 0.0 ? shadow + 0.5f + _Tweak_SystemShadowsLevel : 0.0);
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float shadingGrade = lerp(halfLambert, halfLambert * systemShadows, _Set_SystemShadowsToBase );
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float firstColorFeatherForMask = lerp(_1st_ShadeColor_Feather, 0.0f, max(_ComposerMaskMode, _FirstShadeOverridden));
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float finalShadow = saturate((shadingGrade - (_1st_ShadeColor_Step - firstColorFeatherForMask)) / (_1st_ShadeColor_Step - (_1st_ShadeColor_Step - firstColorFeatherForMask))); // Base and 1st Shade Mask
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if (lightData.diffuseDimmer > 0.0 && finalShadow > 0.0)
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{
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float secondColorFeatherForMask = lerp(_2nd_ShadeColor_Feather, 0.0f, max(_SecondShadeOverridden, _ComposerMaskMode));
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float shadeShadow = saturate((halfLambert - (_ShadeColor_Step - secondColorFeatherForMask)) / (_ShadeColor_Step - (_ShadeColor_Step - secondColorFeatherForMask))); // 1st and 2nd Shades Mask
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float3 diffuseTerm = lerp(lerp(bsdfData.secondShadingDiffuseColor, bsdfData.firstShadingDiffuseColor, shadeShadow), bsdfData.diffuseColor, finalShadow);
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float3 specularTerm = ComputeSpecularTerm(V, L, bsdfData) * finalShadow;
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float4 lightColor = EvaluateLight_Directional(lightLoopContext, posInput, lightData);
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lightColor.rgb *= ComputeShadowColor(systemShadows, lightData.shadowTint, lightData.penumbraTint) * lightColor.a * _Light_Intensity_Multiplier;
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lightColor.rgb = GetLimitedLightColor(lightColor.rgb);
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lighting.diffuse = diffuseTerm * lightColor.rgb * lightData.diffuseDimmer;
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lighting.specular += specularTerm * lightColor.rgb * lightData.specularDimmer;
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}
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return lighting;
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}
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void UtsPostEvaluateBSDF(PositionInputs posInput, PreLightData preLightData, UtsBSDFData bsdfData, BuiltinData builtinData, AggregateLighting lighting, out LightLoopOutput lightLoopOutput)
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{
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AmbientOcclusionFactor aoFactor;
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GetScreenSpaceAmbientOcclusionMultibounce(posInput.positionSS, preLightData.NdotV, bsdfData.perceptualRoughness, bsdfData.ambientOcclusion, bsdfData.specularOcclusion, bsdfData.diffuseColor, bsdfData.fresnel0, aoFactor);
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builtinData.bakeDiffuseLighting = APPLY_WEIGHT(builtinData.bakeDiffuseLighting, aoFactor.indirectAmbientOcclusion, _AO_Factor);
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lighting.indirect.specularReflected = APPLY_WEIGHT(lighting.indirect.specularReflected, aoFactor.indirectSpecularOcclusion, _AO_Factor);
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lighting.direct.diffuse = APPLY_WEIGHT(lighting.direct.diffuse, aoFactor.directAmbientOcclusion, _AO_Factor);
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lighting.direct.specular = APPLY_WEIGHT(lighting.direct.specular, aoFactor.directSpecularOcclusion, _AO_Factor);
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builtinData.bakeDiffuseLighting = ApplyCurrentExposureMultiplier(builtinData.bakeDiffuseLighting * bsdfData.diffuseColor * _ID_Intensity);
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lighting.indirect.specularReflected = ApplyCurrentExposureMultiplier(lighting.indirect.specularReflected * bsdfData.fresnel0 * _IR_Intensity);
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lightLoopOutput.diffuseLighting = lighting.direct.diffuse + builtinData.bakeDiffuseLighting + builtinData.emissiveColor;
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lightLoopOutput.specularLighting = lighting.direct.specular + lighting.indirect.specularReflected;
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// Rescale the GGX to account for the multiple scattering.
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lightLoopOutput.specularLighting *= 1.0 + bsdfData.fresnel0 * preLightData.energyCompensation;
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}
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#endif
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