CollectionTetrahedralFacade.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
#include "Chaos/PBDSoftsEvolutionFwd.h"
#include "Containers/UnrealString.h"
#include "Containers/Array.h"
#include "GeometryCollection/ManagedArrayCollection.h"
#include "GeometryCollection/ManagedArrayAccessor.h"
#include "GeometryCollection/Facades/CollectionPositionTargetFacade.h"
 
namespace GeometryCollection::Facades
{
    struct TetrahedralParticleEmbedding
    {
        TetrahedralParticleEmbedding(
            int32 InParticleIndex = INDEX_NONE, 
            int32 InGeometryIndex = INDEX_NONE,
            int32 InTetrahedronIndex = INDEX_NONE,
            TArray<float> InBarycentricWeights = TArray<float>() )
            : ParticleIndex(InParticleIndex)
            , GeometryIndex(InGeometryIndex)
            , TetrahedronIndex(InTetrahedronIndex)
            , BarycentricWeights(InBarycentricWeights) {}
 
        int32 ParticleIndex;
        int32 GeometryIndex;
        int32 TetrahedronIndex;
        TArray<float> BarycentricWeights;
    };
 
    class FTetrahedralFacade
    {
        const FManagedArrayCollection& ConstCollection;
        FManagedArrayCollection* Collection = nullptr;
 
    public:
 
        CHAOS_API FTetrahedralFacade(FManagedArrayCollection& InSelf);
        CHAOS_API FTetrahedralFacade(const FManagedArrayCollection& InSelf);
        CHAOS_API virtual ~FTetrahedralFacade();
 
        CHAOS_API void DefineSchema();
 
        bool IsConst() const { return Collection==nullptr; }
 
        CHAOS_API bool IsValid() const;
 
        bool Intersection(
            const TConstArrayView<Chaos::Softs::FSolverVec3>& SamplePositions, 
            const TConstArrayView<Chaos::Softs::FSolverVec3>& TetarhedronPositions,
            TArray<TetrahedralParticleEmbedding>& OutIntersections) const;
 
        //
        // Attributes
        //
 
        const TManagedArrayAccessor<FIntVector4> Tetrahedron;
        const TManagedArrayAccessor<int32> TetrahedronStart;
        const TManagedArrayAccessor<int32> TetrahedronCount;
        const TManagedArrayAccessor<int32> VertexStart;
        const TManagedArrayAccessor<int32> VertexCount;
        const TManagedArrayAccessor<FVector3f> Vertex;
    };
 
 
}