GeometryCollectionCollisionStructureManager.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "GeometryCollection/GeometryCollection.h"
#include "GeometryCollection/GeometryCollectionSimulationCoreTypes.h"
#include "GeometryCollection/GeometryCollectionSimulationTypes.h"
#include "UObject/ObjectMacros.h"
 
namespace Chaos { class FErrorReporter; }
 
namespace Chaos
{
    class FTriangleMesh;
    class FLevelSet;
 
    template <typename T, int d>
    class TParticles;
    using FParticles = TParticles<FReal, 3>;
}
 
 
 
class FCollisionStructureManager
{
public:
    CHAOS_API FCollisionStructureManager();
    virtual ~FCollisionStructureManager() {}
 
    typedef TArray<Chaos::FVec3> FPoints;
    typedef Chaos::FBVHParticles FSimplicial;
    typedef Chaos::FImplicitObject FImplicit;
 
    static CHAOS_API FSimplicial* NewSimplicial(
        const Chaos::FParticles& Vertices,
        const Chaos::FTriangleMesh& TriMesh,
        const Chaos::FImplicitObject* Implicit,
        const int32 CollisionParticlesMaxInput);
    
    static CHAOS_API FSimplicial* NewSimplicial(
        const Chaos::FParticles& AllParticles,
        const TManagedArray<int32>& BoneMap,
        const ECollisionTypeEnum CollisionType,
        Chaos::FTriangleMesh& TriMesh,
        const float CollisionParticlesFraction);
 
    static CHAOS_API void UpdateImplicitFlags(
        FImplicit* Implicit, 
        const ECollisionTypeEnum CollisionType);
 
    static CHAOS_API Chaos::FImplicitObjectRef NewImplicit(
        Chaos::FErrorReporter ErrorReporter,
        const Chaos::FParticles& MeshParticles,
        const Chaos::FTriangleMesh& TriMesh,
        const FBox& CollisionBounds,
        const Chaos::FReal Radius,
        const int32 MinRes,
        const int32 MaxRes,
        const float CollisionObjectReduction,
        const ECollisionTypeEnum CollisionType,
        const EImplicitTypeEnum ImplicitType);
 
    static CHAOS_API Chaos::FImplicitObjectRef NewImplicitBox(
        const FBox& CollisionBounds,
        const float CollisionObjectReduction,
        const ECollisionTypeEnum CollisionType);
 
    static CHAOS_API Chaos::FImplicitObjectRef NewImplicitSphere(
        const Chaos::FReal Radius,
        const float CollisionObjectReduction,
        const ECollisionTypeEnum CollisionType);
 
    static CHAOS_API Chaos::FImplicitObjectRef NewImplicitCapsule(
        const Chaos::FReal Radius,
        const Chaos::FReal Length,
        const float CollisionObjectReduction,
        const ECollisionTypeEnum CollisionType);
 
    static CHAOS_API Chaos::FImplicitObjectRef NewImplicitCapsule(
        const FBox& CollisionBounds,
        const float CollisionObjectReduction,
        const ECollisionTypeEnum CollisionType);
 
    static CHAOS_API Chaos::FImplicitObjectRef NewImplicitConvex(
        const TArray<int32>& ConvexIndices,
        const TManagedArray<Chaos::FConvexPtr>* ConvexGeometry,
        const ECollisionTypeEnum CollisionType,
        const FTransform& MassTransform,
        const Chaos::FReal CollisionMarginFraction,
        const float CollisionObjectReduction);
 
    static CHAOS_API Chaos::FImplicitObjectRef NewImplicitLevelset(
        Chaos::FErrorReporter ErrorReporter,
        const Chaos::FParticles& MeshParticles,
        const Chaos::FTriangleMesh& TriMesh,
        const FBox& CollisionBounds,
        const int32 MinRes,
        const int32 MaxRes,
        const float CollisionObjectReduction,
        const ECollisionTypeEnum CollisionType);
 
    static CHAOS_API Chaos::FLevelSetRef NewLevelset(
        Chaos::FErrorReporter ErrorReporter,
        const Chaos::FParticles& MeshParticles,
        const Chaos::FTriangleMesh& TriMesh,
        const FBox& CollisionBounds,
        const int32 MinRes,
        const int32 MaxRes,
        const ECollisionTypeEnum CollisionType);
 
    static CHAOS_API FVector CalculateUnitMassInertiaTensor(
        const FBox& BoundingBox,
        const Chaos::FReal Radius,
        const EImplicitTypeEnum ImplicitType);
 
    static CHAOS_API Chaos::FReal CalculateVolume(
        const FBox& BoundingBox,
        const Chaos::FReal Radius,
        const EImplicitTypeEnum ImplicitType);
};