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1722da7465
- Raytracing shadows/reflections/AO/GI/etc and path tracer now work in large worlds. - Updated parts of Lumen using raytracing to work in large worlds. - This change doesn't not address (all) GPU Lightmass issues in large worlds. Changes: - Build TLAS with instances in translated world space. - Move ray origin to translated world space. - Updated raytracing shaders to use translated world space (most LWCHackToFloat in these shaders are now gone). - Store gather points positions in translated world space. - Removed unused RayTracingDynamicMeshVS(...) #rb Yuriy.ODonnell, Patrick.Kelly, chris.kulla, rob.krajcarski #jira UE-140558 #preflight 620bb3ff4353dc61c7f51e64 [CL 18995354 by tiago costa in ue5-main branch]
40 lines
1.9 KiB
Plaintext
40 lines
1.9 KiB
Plaintext
// Copyright Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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PositionReconstructionCommon.ush: utils functions used in multiple ray generation shaders
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=============================================================================*/
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#pragma once
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float3 ReconstructTranslatedWorldPositionFromDeviceZ(uint2 PixelCoord, float DeviceZ)
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{
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float4 TranslatedWorldPosition = mul(float4(PixelCoord + 0.5, DeviceZ, 1), View.SVPositionToTranslatedWorld);
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TranslatedWorldPosition.xyz /= TranslatedWorldPosition.w;
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return TranslatedWorldPosition.xyz;
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}
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void ReconstructTranslatedWorldPositionAndCameraDirectionFromDeviceZ(uint2 PixelCoord, float DeviceZ, out float3 OutTranslatedWorldPosition, out float3 OutCameraDirection)
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{
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float4 TranslatedWorldPosition = mul(float4(PixelCoord + 0.5, DeviceZ, 1), View.SVPositionToTranslatedWorld);
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TranslatedWorldPosition.xyz /= TranslatedWorldPosition.w;
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OutTranslatedWorldPosition = TranslatedWorldPosition.xyz;
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OutCameraDirection = normalize(TranslatedWorldPosition.xyz - View.TranslatedWorldCameraOrigin);
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}
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float3 ReconstructTranslatedWorldPositionFromDepth(float2 UV, float SceneDepth)
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{
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float2 ScreenPosition = (UV - View.ScreenPositionScaleBias.wz) / View.ScreenPositionScaleBias.xy;
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float4 HomogeneousWorldPosition = mul(float4(ScreenPosition * SceneDepth, SceneDepth, 1), PrimaryView.ScreenToTranslatedWorld);
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float3 TranslatedWorldPosition = HomogeneousWorldPosition.xyz / HomogeneousWorldPosition.w;
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return TranslatedWorldPosition;
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}
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float3 ReconstructWorldPositionFromDepth(float2 UV, float Depth)
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{
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float2 ScreenPosition = (UV - View.ScreenPositionScaleBias.wz) / View.ScreenPositionScaleBias.xy;
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float4 HomogeneousWorldPosition = mul(float4(ScreenPosition * Depth, Depth, 1), LWCHackToFloat(PrimaryView.ScreenToWorld));
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float3 WorldPosition = HomogeneousWorldPosition.xyz / HomogeneousWorldPosition.w;
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return WorldPosition;
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}
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