InstanceDataTypes.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
 
#include "InstanceDataTypes.generated.h"
 
class FInstanceSceneDataBuffers;
class FInstanceDataUpdateTaskInfo;
class FInstanceDataSceneProxy;
 
USTRUCT(BlueprintType)
struct FPrimitiveInstanceId
{
    GENERATED_BODY()
    inline bool IsValid() const { return Id != INDEX_NONE; }
    inline bool operator==(const FPrimitiveInstanceId &Other) const { return Other.Id == Id;}
 
    inline int32 GetAsIndex() const { return Id; }
 
    friend FArchive& operator<<(FArchive& Ar, FPrimitiveInstanceId& InstanceData)
    {
        Ar << InstanceData.Id;
        return Ar;
    }
 
    int32 Id = INDEX_NONE;
};
 
union FInstanceDataFlags
{
    uint16 Packed;
    struct
    {
        uint16 bHasPerInstanceRandom : 1;
        uint16 bHasPerInstanceCustomData : 1;
        uint16 bHasPerInstanceDynamicData : 1;
        uint16 bHasPerInstanceSkinningData : 1;
        uint16 bHasPerInstanceLMSMUVBias : 1;
        uint16 bHasPerInstanceLocalBounds : 1;
        uint16 bHasPerInstanceHierarchyOffset : 1;
        uint16 bHasPerInstancePayloadExtension : 1;
        uint16 bHasPerInstanceVisible : 1;
        uint16 bHasPerInstanceEditorData : 1;
        uint16 bHasCompressedSpatialHash : 1;
    };
 
    inline bool operator == (FInstanceDataFlags Other) const { return Packed == Other.Packed; }
 
    inline FInstanceDataFlags()
    {
        Packed = 0;
    }
};
 
struct FInstanceDataBufferHeader
{
    int32 NumInstances = 0;
    uint32 PayloadDataStride = 0u;
    FInstanceDataFlags Flags;
    bool bInstanceDataIsGPUOnly : 1 = false;
 
    inline bool operator==(const FInstanceDataBufferHeader& Other) const
    {
        return NumInstances == Other.NumInstances && PayloadDataStride == Other.PayloadDataStride && Flags == Other.Flags && bInstanceDataIsGPUOnly == Other.bInstanceDataIsGPUOnly;
    }
 
    ENGINE_API static const FInstanceDataBufferHeader SinglePrimitiveHeader;
};
 
class FInstanceSceneDataBuffers;
class FInstanceDataUpdateTaskInfo;
class FInstanceDataSceneProxy;