WorldPartitionRuntimeCellDataSpatialHash.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "CoreMinimal.h"
#include "WorldPartition/WorldPartitionRuntimeCellData.h"
#include "WorldPartitionRuntimeCellDataSpatialHash.generated.h"
 
class UActorContainer;
class UWorldPartitionRuntimeCell;
 
UCLASS(Within = WorldPartitionRuntimeCell, MinimalAPI)
class UWorldPartitionRuntimeCellDataSpatialHash : public UWorldPartitionRuntimeCellData
{
    GENERATED_UCLASS_BODY()
 
    //~Begin UWorldPartitionRuntimeCellData
    ENGINE_API virtual void ResetStreamingSourceInfo(const FWorldPartitionStreamingContext& Context) const override;
    UE_DEPRECATED(5.6, "Use version that takes a boolean to flag if the cell blocks on slow loading (bBlockOnSlowLoading).")
    ENGINE_API virtual void AppendStreamingSourceInfo(const FWorldPartitionStreamingSource& Source, const FSphericalSector& SourceShape, const FWorldPartitionStreamingContext& Context) const override;
    ENGINE_API virtual void AppendStreamingSourceInfo(const FWorldPartitionStreamingSource& Source, const FSphericalSector& SourceShape, const FWorldPartitionStreamingContext& Context, bool bBlockOnSlowLoading) const override;
    ENGINE_API virtual void MergeStreamingSourceInfo() const override;
    ENGINE_API virtual int32 SortCompare(const UWorldPartitionRuntimeCellData* InOther) const override;
    ENGINE_API virtual FBox GetCellBounds() const override;
    ENGINE_API virtual FBox GetStreamingBounds() const override;
    ENGINE_API virtual bool IsDebugShown() const override;
    //~End UWorldPartitionRuntimeCellData
 
    UPROPERTY()
    FVector Position;
 
    UPROPERTY()
    float Extent;
 
private:
    float ComputeSourceToCellAngleFactor(const FSphericalSector& SourceShape) const;
 
    // Modulated distance to the different streaming sources used to sort relative priority amongst streaming cells
    // The value is affected by :
    // - All sources intersecting the cell
    // - The priority of each source
    // - The distance between the cell and each source
    // - The angle between the cell and each source orientation
    mutable double CachedSourceSortingDistance;
 
    // Source Priorities
    mutable TArray<float> CachedSourcePriorityWeights;
 
    // Square distance from the cell to  the intersecting streaming sources
    mutable TArray<double> CachedSourceSquaredDistances;
 
    // Intersecting streaming source shapes
    mutable TArray<FSphericalSector> CachedInstersectingShapes;
 
    // 2D version of CachedMinBlockOnSlowStreamingRatio
    mutable double CachedMinBlockOnSlowStreamingRatio2D;
 
    // 2D version of CachedMinSquareDistanceToBlockingSource
    mutable double CachedMinSquareDistanceToBlockingSource2D;
 
    // 2D version of CachedMinSlowStreamingRatio
    mutable double CachedMinSlowStreamingRatio2D;
 
    // 2D version of CachedMinSquareDistanceToSource
    mutable double CachedMinSquareDistanceToSource2D;
};