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- PR #9563 contributed by tuxerr, with modifications - InstancedView UB duplicates per-view View UB properties in arrays and uses ViewIndex to index into them when creating resolved ViewState (instead of a branch). - Paves the way for potential "always-on ISR". #jira UE-163717 #review @Robert.Srinivasiah, @Christopher.Waters, @Yuriy.ODonnell, @Jules.Blok #preflight 6386ed9b170bc34a93076918 #rb Yuriy.ODonnell [CL 23341764 by tuxerr in ue5-main branch]
79 lines
2.7 KiB
Plaintext
79 lines
2.7 KiB
Plaintext
// Copyright Epic Games, Inc. All Rights Reserved..
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/*=============================================================================
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InstancedStereo.usf: Resolve which view uniforms in a stereo pair to use.
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=============================================================================*/
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#pragma once
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// Explictly include view uniform buffers
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#include "/Engine/Generated/UniformBuffers/View.ush"
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#include "/Engine/Generated/UniformBuffers/InstancedView.ush"
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// ViewState, GetPrimaryView and GetInstancedView are generated by the shader compiler to ensure View uniform buffer changes are up to date.
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// see GenerateInstancedStereoCode()
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#include "/Engine/Generated/GeneratedInstancedStereo.ush"
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void FinalizeViewState(inout ViewState InOutView)
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{
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InOutView.WorldToClip = MakeLWCInverseMatrix(InOutView.MatrixTilePosition, InOutView.RelativeWorldToClip);
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InOutView.ClipToWorld = MakeLWCMatrix(InOutView.MatrixTilePosition, InOutView.ClipToRelativeWorld);
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InOutView.ScreenToWorld = MakeLWCMatrix(InOutView.MatrixTilePosition, InOutView.ScreenToRelativeWorld);
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InOutView.PrevClipToWorld = MakeLWCMatrix(InOutView.MatrixTilePosition, InOutView.PrevClipToRelativeWorld);
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InOutView.WorldCameraOrigin = MakeLWCVector3(InOutView.ViewTilePosition, InOutView.RelativeWorldCameraOrigin);
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InOutView.WorldViewOrigin = MakeLWCVector3(InOutView.ViewTilePosition, InOutView.RelativeWorldViewOrigin);
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InOutView.PrevWorldCameraOrigin = MakeLWCVector3(InOutView.ViewTilePosition, InOutView.PrevRelativeWorldCameraOrigin);
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InOutView.PrevWorldViewOrigin = MakeLWCVector3(InOutView.ViewTilePosition, InOutView.PrevRelativeWorldViewOrigin);
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InOutView.PreViewTranslation = MakeLWCVector3(-InOutView.ViewTilePosition, InOutView.RelativePreViewTranslation);
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InOutView.PrevPreViewTranslation = MakeLWCVector3(-InOutView.ViewTilePosition, InOutView.RelativePrevPreViewTranslation);
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}
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#define PrimaryView GetPrimaryView()
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static ViewState ResolvedView = (ViewState)0.0f;
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ViewState ResolveView()
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{
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return GetPrimaryView();
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}
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#if (INSTANCED_STEREO || MOBILE_MULTI_VIEW)
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ViewState ResolveView(uint ViewIndex)
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{
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return GetInstancedView(ViewIndex);
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}
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#endif
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#if INSTANCED_STEREO
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static const float EyeOffsetScale[2] = { -1.0, 1.0 };
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static const float4 EyeClipEdge[2] = { float4(-1.0, 0.0, 0.0, 1.0), float4(1.0, 0.0, 0.0, 1.0) };
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#endif
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bool IsInstancedStereo()
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{
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#if INSTANCED_STEREO
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return (uint)InstancedView_StereoPassIndex[1] > 0;
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#else
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return false;
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#endif
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}
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uint GetEyeIndex(uint InstanceId)
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{
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#if INSTANCED_STEREO
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return IsInstancedStereo() ? InstanceId & 1 : 0;
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#else
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return 0;
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#endif
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}
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uint GetInstanceId(uint InstanceId)
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{
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#if INSTANCED_STEREO
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return IsInstancedStereo() ? InstanceId / 2 : InstanceId;
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#else
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return InstanceId;
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#endif
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}
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