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- Local = main array of lights in ForwardLightData (which currently translates to visibible in view frustum) - Grid = cell inside the light grid. #rb Krzysztof.Narkowicz [CL 29717147 by tiago costa in ue5-main branch]
31 lines
1.3 KiB
Plaintext
31 lines
1.3 KiB
Plaintext
// Copyright Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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VirtualShadowMapLightGrid.ush:
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=============================================================================*/
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#pragma once
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#include "../Common.ush"
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#include "../LightGridCommon.ush"
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FCulledLightsGridData VirtualShadowMapGetLightsGrid(uint2 PixelPos, float SceneDepth)
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{
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// Has no effect unless INSTANCED_STEREO is enabled. Used in GetLightGridData to select ForwardLightData or ForwardLightDataISR, but then only uses redundant parameters anyway.
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uint EyeIndex = 0U;
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uint GridLinearIndex = ComputeLightGridCellIndex(PixelPos, SceneDepth, EyeIndex);
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FCulledLightsGridData CulledLightGridData = GetCulledLightsGrid(GridLinearIndex, EyeIndex);
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// Replace light count with our pruned count
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CulledLightGridData.NumLights = VirtualShadowMap.NumCulledLightsGrid[GridLinearIndex];
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return CulledLightGridData;
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}
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FLocalLightData VirtualShadowMapGetLocalLightData(FCulledLightsGridData GridData, uint Index)
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{
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const uint ListIndex = GridData.DataStartIndex + Index;
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checkStructuredBufferAccessSlow(VirtualShadowMap.LightGridData, ListIndex);
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const uint LightGridLightIndex = VirtualShadowMap.LightGridData[ListIndex];
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return GetLocalLightDataNonStereo(LightGridLightIndex);
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}
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