ParticleResources.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
    ParticleResources.h: Declaration of global particle resources.
=============================================================================*/
 
#pragma once
 
#include "CoreMinimal.h"
#include "RenderResource.h"
 
enum { MAX_PARTICLES_PER_INSTANCE = 16 };
extern const int32 GParticleScratchVertexBufferSize;
 
class FParticleTexCoordVertexBuffer : public FVertexBuffer
{
public:
    virtual void InitRHI(FRHICommandListBase& RHICmdList) override;
};
 
extern ENGINE_API TGlobalResource<FParticleTexCoordVertexBuffer> GParticleTexCoordVertexBuffer;
 
class FParticleEightTexCoordVertexBuffer : public FVertexBuffer
{
public:
    virtual void InitRHI(FRHICommandListBase& RHICmdList) override;
};
 
extern TGlobalResource<FParticleEightTexCoordVertexBuffer> GParticleEightTexCoordVertexBuffer;
 
class FParticleIndexBuffer : public FIndexBuffer
{
public:
    virtual void InitRHI(FRHICommandListBase& RHICmdList) override;
};
 
class FSixTriangleParticleIndexBuffer : public FIndexBuffer
{
public:
    virtual void InitRHI(FRHICommandListBase& RHICmdList) override;
};
 
ENGINE_API extern TGlobalResource<FParticleIndexBuffer> GParticleIndexBuffer;
ENGINE_API extern TGlobalResource<FSixTriangleParticleIndexBuffer> GSixTriangleParticleIndexBuffer;
 
typedef FRHIShaderResourceView* FParticleShaderParamRef;
typedef FRHIBuffer* FParticleBufferParamRef;
 
class FParticleScratchVertexBuffer : public FVertexBuffer
{
public:
 
    FParticleShaderParamRef GetShaderParam();
    FParticleBufferParamRef GetBufferParam();
 
    virtual void InitRHI(FRHICommandListBase& RHICmdList) override;
    virtual void ReleaseRHI() override;
 
    static const uint32 Stride = sizeof(FVector4f);
 
private:
 
    FShaderResourceViewRHIRef VertexBufferSRV_A32B32G32R32F;
};
 
extern TGlobalResource<FParticleScratchVertexBuffer> GParticleScratchVertexBuffer;