InstancedSkinnedMeshSceneProxy.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "InstancedSkinnedMeshSceneProxyDesc.h"
#include "InstanceDataSceneProxy.h"
#include "NaniteSceneProxy.h"
#include "SkeletalMeshSceneProxy.h"
 
struct FInstancedSkinnedMeshData
{
    FInstancedSkinnedMeshData(const FInstancedSkinnedMeshSceneProxyDesc& InMeshDesc);
 
    bool GetInstanceDrawDistanceMinMax(FVector2f& OutCullRange) const;
 
    void SetInstanceCullDistance_RenderThread(float StartCullDistance, float EndCullDistance);
 
    FInstanceDataUpdateTaskInfo *GetInstanceDataUpdateTaskInfo() const
    {
        return InstanceDataSceneProxy ? InstanceDataSceneProxy->GetUpdateTaskInfo() : nullptr;
    }
 
    TSharedPtr<FInstanceDataSceneProxy, ESPMode::ThreadSafe> InstanceDataSceneProxy;
    float AnimationMinScreenSize = 0.0f;
    uint32 InstanceMinDrawDistance = 0;
    uint32 InstanceStartCullDistance = 0;
    uint32 InstanceEndCullDistance = 0;
};
 
class FNaniteInstancedSkinnedMeshSceneProxy : public Nanite::FSkinnedSceneProxy
{
public:
    using Super = Nanite::FSkinnedSceneProxy;
 
    FNaniteInstancedSkinnedMeshSceneProxy(const Nanite::FMaterialAudit& MaterialAudit, UInstancedSkinnedMeshComponent* InComponent, FSkeletalMeshRenderData* InRenderData)
        : FNaniteInstancedSkinnedMeshSceneProxy(MaterialAudit, FInstancedSkinnedMeshSceneProxyDesc(InComponent), InRenderData)
    {}
 
    FNaniteInstancedSkinnedMeshSceneProxy(const Nanite::FMaterialAudit& MaterialAudit, const FInstancedSkinnedMeshSceneProxyDesc& InMeshDesc, FSkeletalMeshRenderData* InRenderData);
 
#if RHI_RAYTRACING
    virtual ERayTracingPrimitiveFlags GetCachedRayTracingInstance(FRayTracingInstance& RayTracingInstance) override
    {
        static const auto RayTracingInstancedSkeletalMeshesCVar = IConsoleManager::Get().FindTConsoleVariableDataInt(TEXT("r.RayTracing.Geometry.InstancedSkeletalMeshes"));
 
        if (RayTracingInstancedSkeletalMeshesCVar && RayTracingInstancedSkeletalMeshesCVar->GetValueOnRenderThread() <= 0)
        {
            return ERayTracingPrimitiveFlags::Exclude;
        }
 
        return Super::GetCachedRayTracingInstance(RayTracingInstance);
    }
#endif
 
    virtual bool GetInstanceDrawDistanceMinMax(FVector2f& OutCullRange) const override
    {
        return Data.GetInstanceDrawDistanceMinMax(OutCullRange);
    }
 
    virtual void SetInstanceCullDistance_RenderThread(float StartCullDistance, float EndCullDistance) override
    {
        Data.SetInstanceCullDistance_RenderThread(StartCullDistance, EndCullDistance);
    }
 
    virtual FInstanceDataUpdateTaskInfo *GetInstanceDataUpdateTaskInfo() const override
    {
        return Data.GetInstanceDataUpdateTaskInfo();
    }
 
    // FPrimitiveSceneProxy interface.
    virtual SIZE_T GetTypeHash() const override
    {
        static size_t UniquePointer;
        return reinterpret_cast<size_t>(&UniquePointer);
    }
 
    virtual float GetAnimationMinScreenSize() const  override
    {
        return Data.AnimationMinScreenSize;
    }
 
private:
    FInstancedSkinnedMeshData Data;
};
 
class FInstancedSkinnedMeshSceneProxy : public FSkeletalMeshSceneProxy
{
public:
    using Super = FSkeletalMeshSceneProxy;
    
    FInstancedSkinnedMeshSceneProxy(const FInstancedSkinnedMeshSceneProxyDesc& InMeshDesc, FSkeletalMeshRenderData* InRenderData);
 
#if RHI_RAYTRACING
    virtual ERayTracingPrimitiveFlags GetCachedRayTracingInstance(FRayTracingInstance& RayTracingInstance) override
    {
        static const auto RayTracingInstancedSkeletalMeshesCVar = IConsoleManager::Get().FindTConsoleVariableDataInt(TEXT("r.RayTracing.Geometry.InstancedSkeletalMeshes"));
 
        if (RayTracingInstancedSkeletalMeshesCVar && RayTracingInstancedSkeletalMeshesCVar->GetValueOnRenderThread() <= 0)
        {
            return ERayTracingPrimitiveFlags::Exclude;
        }
 
        return Super::GetCachedRayTracingInstance(RayTracingInstance);
    }
 
    virtual void GetDynamicRayTracingInstances(FRayTracingInstanceCollector& Collector) override
    {
        checkNoEntry();
    }
#endif
 
    virtual bool GetInstanceDrawDistanceMinMax(FVector2f& OutCullRange) const override
    {
        return Data.GetInstanceDrawDistanceMinMax(OutCullRange);
    }
 
    virtual void SetInstanceCullDistance_RenderThread(float StartCullDistance, float EndCullDistance) override
    {
        Data.SetInstanceCullDistance_RenderThread(StartCullDistance, EndCullDistance);
    }
 
    virtual FInstanceDataUpdateTaskInfo *GetInstanceDataUpdateTaskInfo() const override
    {
        return Data.GetInstanceDataUpdateTaskInfo();
    }
 
    // FPrimitiveSceneProxy interface.
    virtual SIZE_T GetTypeHash() const override
    {
        static size_t UniquePointer;
        return reinterpret_cast<size_t>(&UniquePointer);
    }
 
    virtual float GetAnimationMinScreenSize() const  override
    {
        return Data.AnimationMinScreenSize;
    }
 
private:
    FInstancedSkinnedMeshData Data;
};