70 lines
2.5 KiB
HLSL
70 lines
2.5 KiB
HLSL
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "../Common.ush"
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#include "../SceneData.ush"
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#include "/Engine/Shared/NaniteDefinitions.h"
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#include "NaniteDataDecode.ush"
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#ifndef DISABLE_DISPLACEMENT_BOUNDS
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#define DISABLE_DISPLACEMENT_BOUNDS 0
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#endif
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FInstanceSceneData GetInstanceSceneDataUnchecked(inout FVisibleCluster VisibleCluster)
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{
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FInstanceSceneData InstanceData = GetInstanceSceneDataUnchecked( VisibleCluster.InstanceId );
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#if NANITE_IMPOSTERS_SUPPORTED
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// Couldn't have been stored so signals this is an imposter
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if( VisibleCluster.Flags == (1 << NANITE_NUM_CULLING_FLAG_BITS) )
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{
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const uint MaxStreamingPages = 1 << 12;
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VisibleCluster.PageIndex = MaxStreamingPages + (InstanceData.NaniteRuntimeResourceID & NANITE_MAX_GPU_PAGES_MASK);
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}
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#endif
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return InstanceData;
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}
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FInstanceDynamicData CalculateInstanceDynamicData( FNaniteView NaniteView, FInstanceSceneData InstanceData, bool bSetUpForCulling = false)
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{
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FInstanceDynamicData DynamicData;
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DynamicData.LocalToTranslatedWorld = DFFastToTranslatedWorld(InstanceData.LocalToWorld, NaniteView.PreViewTranslation);
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if (bSetUpForCulling)
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{
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DynamicData.PrevLocalToTranslatedWorld = DFFastToTranslatedWorld(InstanceData.PrevLocalToWorld, NaniteView.PrevPreViewTranslationHZB);
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}
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else
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{
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DynamicData.PrevLocalToTranslatedWorld = DFFastToTranslatedWorld(InstanceData.PrevLocalToWorld, NaniteView.PrevPreViewTranslation);
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}
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DynamicData.bHasMoved = GetSceneData().FrameNumber == InstanceData.LastUpdateSceneFrameNumber;
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return DynamicData;
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}
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float GetAbsMaxMaterialDisplacement(FPrimitiveSceneData PrimitiveData)
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{
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#if DISABLE_DISPLACEMENT_BOUNDS
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return 0.0f;
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#else
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return max(-PrimitiveData.MinMaterialDisplacement, PrimitiveData.MaxMaterialDisplacement);
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#endif
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}
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float GetMaxMaterialDisplacementExtent(FPrimitiveSceneData PrimitiveData, bool bFallbackRaster, bool bIsShadowPass)
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{
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const bool bDisplacementEnabled = !bFallbackRaster || bIsShadowPass ||
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(PrimitiveData.PixelProgrammableDistanceSquared <= 0.0f && PrimitiveData.MaterialDisplacementFadeOutSize <= 0.0f);
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return bDisplacementEnabled ? GetAbsMaxMaterialDisplacement(PrimitiveData) : 0.0f;
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}
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float3 GetLocalMaxWPOExtent(FPrimitiveSceneData PrimitiveData, FInstanceSceneData InstanceData, bool bEnableWPO = true)
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{
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const bool bHasAlwaysEvalWPOMaterial = (PrimitiveData.Flags & PRIMITIVE_SCENE_DATA_FLAG_HAS_ALWAYS_EVALUATE_WPO_MATERIALS) != 0;
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return (bEnableWPO || bHasAlwaysEvalWPOMaterial) ? abs(PrimitiveData.MaxWPOExtent * InstanceData.InvNonUniformScale) : (float3)0;
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}
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