You've already forked UnrealEngineUWP
mirror of
https://github.com/izzy2lost/UnrealEngineUWP.git
synced 2026-03-26 18:15:20 -07:00
40ce74210e
Controls the amount of temporal dither filtering applied to shadows for this light. Higher filtering can be used to hide aliasing from low-res shadows while lower filtering can be used to limit any filtering when we require crisp, detailed, high-res shadows. #rb andrew.lauritzen #jira UE-197815 [CL 31489434 by wouter dek in 5.4 branch]
100 lines
4.6 KiB
Plaintext
100 lines
4.6 KiB
Plaintext
// Copyright Epic Games, Inc. All Rights Reserved.
|
|
|
|
#pragma once
|
|
|
|
#include "../LargeWorldCoordinates.ush"
|
|
#include "/Engine/Shared/VirtualShadowMapDefinitions.h"
|
|
|
|
// Rougly the same structure as in VirtualShadowMapArray.h, with some logic around LWC values
|
|
struct FVirtualShadowMapProjectionShaderData
|
|
{
|
|
float4x4 ShadowViewToClipMatrix;
|
|
float4x4 TranslatedWorldToShadowUVMatrix;
|
|
float4x4 TranslatedWorldToShadowUVNormalMatrix;
|
|
|
|
float3 LightDirection;
|
|
uint LightType; // Matches ELightComponentType via defines in SSDDefinitions.ush
|
|
|
|
FDFVector3 PreViewTranslation;
|
|
float LightRadius;
|
|
float ResolutionLodBias;
|
|
|
|
float3 ClipmapWorldOriginOffset; // Clipmap origin, in shadow translated world
|
|
|
|
int2 ClipmapCornerRelativeOffset;
|
|
int ClipmapLevel; // "Absolute" level, can be negative
|
|
int ClipmapLevelCountRemaining; // Remaining levels, relative to this one
|
|
|
|
uint Flags;
|
|
float ClipmapLevelWPODistanceDisabledThresholdSquared;
|
|
float LightSourceRadius;
|
|
|
|
// Derived data for convenience when passing the structure around
|
|
int VirtualShadowMapId;
|
|
bool bUnCached; // see VSM_PROJ_FLAG_UNCACHED
|
|
bool bUnreferenced; // see VSM_PROJ_FLAG_UNREFERENCED
|
|
float TexelDitherScale; // Per-light additional dither filtering
|
|
};
|
|
|
|
FVirtualShadowMapProjectionShaderData DecodeVirtualShadowMapProjectionData(ByteAddressBuffer ProjectionData, int VirtualShadowMapId)
|
|
{
|
|
FVirtualShadowMapProjectionShaderData Result;
|
|
Result.VirtualShadowMapId = VirtualShadowMapId;
|
|
|
|
// Seems the FMatrix forces 16-byte alignment, so ensure padding matches the C++ structure size
|
|
const uint Stride = 16 * 18;
|
|
const uint Base = VirtualShadowMapId * Stride;
|
|
|
|
Result.ShadowViewToClipMatrix[0] = asfloat(ProjectionData.Load4(Base + 16*0));
|
|
Result.ShadowViewToClipMatrix[1] = asfloat(ProjectionData.Load4(Base + 16*1));
|
|
Result.ShadowViewToClipMatrix[2] = asfloat(ProjectionData.Load4(Base + 16*2));
|
|
Result.ShadowViewToClipMatrix[3] = asfloat(ProjectionData.Load4(Base + 16*3));
|
|
Result.TranslatedWorldToShadowUVMatrix[0] = asfloat(ProjectionData.Load4(Base + 16*4));
|
|
Result.TranslatedWorldToShadowUVMatrix[1] = asfloat(ProjectionData.Load4(Base + 16*5));
|
|
Result.TranslatedWorldToShadowUVMatrix[2] = asfloat(ProjectionData.Load4(Base + 16*6));
|
|
Result.TranslatedWorldToShadowUVMatrix[3] = asfloat(ProjectionData.Load4(Base + 16*7));
|
|
Result.TranslatedWorldToShadowUVNormalMatrix[0] = asfloat(ProjectionData.Load4(Base + 16*8));
|
|
Result.TranslatedWorldToShadowUVNormalMatrix[1] = asfloat(ProjectionData.Load4(Base + 16*9));
|
|
Result.TranslatedWorldToShadowUVNormalMatrix[2] = asfloat(ProjectionData.Load4(Base + 16*10));
|
|
Result.TranslatedWorldToShadowUVNormalMatrix[3] = asfloat(ProjectionData.Load4(Base + 16*11));
|
|
|
|
// NOTE: Stick with struct-element-sized loads for the moment since we may only be using subsets
|
|
// of the data in the calling code and we want to ensure the compiler has simple DCE options.
|
|
|
|
Result.LightDirection = asfloat(ProjectionData.Load3(Base + (16*12 + 4*0)));
|
|
Result.LightType = (ProjectionData.Load (Base + (16*12 + 4*3)));
|
|
|
|
float3 PreViewTranslationHigh = asfloat(ProjectionData.Load3(Base + (16*13 + 4*0)));
|
|
Result.LightRadius = asfloat(ProjectionData.Load (Base + (16*13 + 4*3)));
|
|
|
|
float3 PreViewTranslationLow = asfloat(ProjectionData.Load3(Base + (16*14 + 4*0)));
|
|
Result.ResolutionLodBias = asfloat(ProjectionData.Load (Base + (16*14 + 4*3)));
|
|
|
|
float3 NegativeClipmapWorldOriginOffset = asfloat(ProjectionData.Load3(Base + (16*15 + 4*0)));
|
|
Result.LightSourceRadius = asfloat(ProjectionData.Load (Base + (16*15 + 4*3)));
|
|
|
|
Result.ClipmapCornerRelativeOffset = asint (ProjectionData.Load2(Base + (16*16 + 4*0)));
|
|
Result.ClipmapLevel = asint (ProjectionData.Load (Base + (16*16 + 4*2)));
|
|
Result.ClipmapLevelCountRemaining = asint (ProjectionData.Load (Base + (16*16 + 4*3)));
|
|
|
|
Result.Flags = (ProjectionData.Load (Base + (16*17 + 4*0)));
|
|
Result.ClipmapLevelWPODistanceDisabledThresholdSquared
|
|
= asfloat(ProjectionData.Load (Base + (16*17 + 4*1)));
|
|
|
|
Result.TexelDitherScale = asfloat(ProjectionData.Load (Base + (16*17 + 4*2)));
|
|
|
|
// Computed data
|
|
Result.PreViewTranslation = MakeDFVector3(PreViewTranslationHigh, PreViewTranslationLow);
|
|
Result.ClipmapWorldOriginOffset = -NegativeClipmapWorldOriginOffset;
|
|
|
|
Result.bUnCached = (Result.Flags & VSM_PROJ_FLAG_UNCACHED) != 0U;
|
|
Result.bUnreferenced = (Result.Flags & VSM_PROJ_FLAG_UNREFERENCED) != 0U;
|
|
|
|
return Result;
|
|
}
|
|
|
|
FVirtualShadowMapProjectionShaderData GetVirtualShadowMapProjectionData(int VirtualShadowMapId)
|
|
{
|
|
return DecodeVirtualShadowMapProjectionData(VirtualShadowMap.ProjectionData, VirtualShadowMapId);
|
|
}
|