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40 行
1.7 KiB
40 行
1.7 KiB
// This file is empty on purpose. Projects can put their custom shadow algorithms in here so they get automatically included by Shadow.hlsl.
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float EvalShadow_CascadedMoment( ShadowContext shadowContext, float3 positionWS, float3 normalWS, int shadowDataIndex, float3 L )
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{
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ShadowData sd = shadowContext.shadowDatas[shadowDataIndex];
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// normal based bias
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positionWS += EvalShadow_NormalBias( normalWS, saturate( dot( normalWS, L ) ), sd.texelSizeRcp.zw, sd.normalBias );
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// load the right shadow data for the current face
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float4 dirShadowSplitSpheres[4];
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uint payloadOffset = EvalShadow_LoadSplitSpheres( shadowContext, shadowDataIndex, dirShadowSplitSpheres );
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int shadowSplitIndex = EvalShadow_GetSplitSphereIndexForDirshadows( positionWS, dirShadowSplitSpheres );
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if (shadowSplitIndex < 0)
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return 1.0;
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// get the shadowmap data for the correct cascade
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sd = shadowContext.shadowDatas[shadowDataIndex + 1 + shadowSplitIndex];
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// get shadowmap texcoords
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float3 posTC = EvalShadow_GetTexcoords( sd, positionWS );
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// sample the texture
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uint texIdx, sampIdx;
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float slice;
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UnpackShadowmapId( sd.id, texIdx, sampIdx, slice );
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uint shadowType, shadowAlgorithm;
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UnpackShadowType( sd.shadowType, shadowType, shadowAlgorithm );
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switch( shadowAlgorithm )
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{
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case (GPUSHADOWALGORITHM_CUSTOM + 1): return 1.0;
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default: return SampleShadow_SelectAlgorithm( shadowContext, sd, payloadOffset, posTC, sd.bias, slice, shadowAlgorithm, texIdx, sampIdx );
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}
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}
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float EvalShadow_CascadedMoment( ShadowContext shadowContext, float3 positionWS, float3 normalWS, int shadowDataIndex, float3 L, float2 unPositionSS )
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{
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return EvalShadow_CascadedMoment( shadowContext, positionWS, normalWS, shadowDataIndex, L );
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}
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