CollectionSelectionFacade.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
#include "Containers/UnrealString.h"
#include "Containers/Array.h"
#include "GeometryCollection/ManagedArrayCollection.h"
 
namespace GeometryCollection::Facades
{
 
    class FSelectionFacade
    {
        CHAOS_API void InitUnboundedGroup(FName GroupName, FName DependencyGroup);
        CHAOS_API void InitWeightedUnboundedGroup(FName GroupName, FName DependencyGroup);
        CHAOS_API void InitBoundedGroup(FName GroupName, FName DependencyGroup, FName BoneDependencyGroup);
        CHAOS_API void InitWeightedBoundedGroup(FName GroupName, FName DependencyGroup, FName BoneDependencyGroup);
 
    public:
 
        // groups
        static CHAOS_API const FName UnboundGroup;
        static CHAOS_API const FName WeightedUnboundGroup;
        static CHAOS_API const FName BoundGroup;
        static CHAOS_API const FName WeightedBoundGroup;
 
        // Attributes
        static CHAOS_API const FName IndexAttribute;
        static CHAOS_API const FName WeightAttribute;
        static CHAOS_API const FName BoneIndexAttribute;
 
        struct FSelectionKey {
            FSelectionKey(int32 InIndex = INDEX_NONE, FName InGroupName = "") :
                Index(InIndex), GroupName(InGroupName) {}
            int32 Index;
            FName GroupName;
        };
 
        CHAOS_API FSelectionFacade(FManagedArrayCollection& InSelf);
        CHAOS_API FSelectionFacade(const FManagedArrayCollection& InSelf);
 
        bool IsConst() const { return Collection==nullptr; }
 
        CHAOS_API FSelectionKey AddSelection(const TArray<int32>& Indices, FName DependencyGroup);
 
        CHAOS_API FSelectionKey AddSelection(const TArray<int32>& Indices, const TArray<float>& Weights, FName DependencyGroup);
 
        CHAOS_API FSelectionKey AddSelection(const int32 BoneIndex, const TArray<int32>& Indices, FName DependencyGroup, FName BoneDependencyGroup = FName(""));
 
        CHAOS_API FSelectionKey AddSelection(const int32 BoneIndex, const TArray<int32>& Indices, const TArray<float>& Weights, FName DependencyGroup, FName BoneDependencyGroup = FName(""));
 
        CHAOS_API void GetSelection(const FSelectionKey& Key, TArray<int32>& Indices) const;
 
        CHAOS_API void GetSelection(const FSelectionKey& Key, TArray<int32>& Indices, TArray<float>& Weights) const;
 
        CHAOS_API void GetSelection(const FSelectionKey& Key, int32& BoneIndex, TArray<int32>& Indices) const;
 
        CHAOS_API void GetSelection(const FSelectionKey& Key, int32& BoneIndex, TArray<int32>& Indices, TArray<float>& Weights) const;
 
    private:
 
        // const collection will be a null pointer, 
        // while non-const will be valid.
        const FManagedArrayCollection& ConstCollection;
        FManagedArrayCollection* Collection = nullptr;
    };
 
}