NaniteVertexFactory.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "RenderingThread.h"
#include "ShaderParameters.h"
#include "VertexFactory.h"
#include "LocalVertexFactory.h"
#include "PrimitiveViewRelevance.h"
 
// Vertex factory that performs Nanite base pass material shading with 
// compute shaders instead of vertex and pixel shaders.
class FNaniteVertexFactory final : public FVertexFactory
{
    DECLARE_VERTEX_FACTORY_TYPE_API(FNaniteVertexFactory, ENGINE_API);
 
public:
    FNaniteVertexFactory(ERHIFeatureLevel::Type FeatureLevel);
    ENGINE_API ~FNaniteVertexFactory();
 
    ENGINE_API virtual void InitRHI(FRHICommandListBase& RHICmdList) override final;
 
    static ENGINE_API bool ShouldCompilePermutation(const FVertexFactoryShaderPermutationParameters& Parameters);
    static ENGINE_API void ModifyCompilationEnvironment(const FVertexFactoryShaderPermutationParameters& Parameters, FShaderCompilerEnvironment& OutEnvironment);
};