75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
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// Copyright 2020-2024 CesiumGS, Inc. and Contributors
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#pragma once
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#include "CesiumCommon.h"
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#include "Engine/StaticMesh.h"
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#include "LocalVertexFactory.h"
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#include "RHIDefinitions.h"
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#include "RHIResources.h"
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#include "Rendering/PositionVertexBuffer.h"
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#include "Runtime/Launch/Resources/Version.h"
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#include "SceneManagement.h"
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/**
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* This generates the indices necessary for point attenuation in a
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* FCesiumGltfPointsComponent.
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*/
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class FCesiumPointAttenuationIndexBuffer : public FIndexBuffer {
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public:
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FCesiumPointAttenuationIndexBuffer(
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const int32& NumPoints,
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const bool bAttenuationSupported)
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: NumPoints(NumPoints), bAttenuationSupported(bAttenuationSupported) {}
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virtual void InitRHI(FRHICommandListBase& RHICmdList) override;
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private:
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// The number of points in the original point mesh. Not to be confused with
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// the number of vertices in the attenuated point mesh.
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const int32 NumPoints;
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const bool bAttenuationSupported;
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};
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/**
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* The parameters to be passed as UserData to the
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* shader.
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*/
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struct FCesiumPointAttenuationBatchElementUserData {
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FRHIShaderResourceView* PositionBuffer;
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FRHIShaderResourceView* PackedTangentsBuffer;
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FRHIShaderResourceView* ColorBuffer;
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FRHIShaderResourceView* TexCoordBuffer;
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uint32 NumTexCoords;
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uint32 bHasPointColors;
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FVector3f AttenuationParameters;
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};
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class FCesiumPointAttenuationBatchElementUserDataWrapper
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: public FOneFrameResource {
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public:
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FCesiumPointAttenuationBatchElementUserData Data;
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};
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class FCesiumPointAttenuationVertexFactory : public FLocalVertexFactory {
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DECLARE_VERTEX_FACTORY_TYPE(FCesiumPointAttenuationVertexFactory);
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public:
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// Sets default values for this component's properties
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FCesiumPointAttenuationVertexFactory(
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ERHIFeatureLevel::Type InFeatureLevel,
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const FPositionVertexBuffer* PositionVertexBuffer);
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static bool ShouldCompilePermutation(
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const FVertexFactoryShaderPermutationParameters& Parameters);
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static void ModifyCompilationEnvironment(
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const FVertexFactoryShaderPermutationParameters& Parameters,
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FShaderCompilerEnvironment& OutEnvironment);
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private:
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virtual void InitRHI(FRHICommandListBase& RHICmdList) override;
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virtual void ReleaseRHI() override;
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};
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