PBDCollisionConstraintHandle.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "CoreMinimal.h"
 
#include "Chaos/CollisionResolutionTypes.h"
#include "Chaos/ConstraintHandle.h"
#include "Chaos/PBDConstraintContainer.h"
 
namespace Chaos
{
    class FPBDCollisionConstraints;
    class FPBDCollisionConstraint;
    class FPBDCollisionContainerSolver;
 
    enum class ECollisionCCDType
    {
        // Standard contact constraint
        Disabled,
 
        // Swept contact constraint
        Enabled,
    };
 
    enum ECollisionConstraintDirection
    {
        // Particle 1 is on top
        Particle0ToParticle1,
 
        // Particle 0 is on top
        Particle1ToParticle0,
 
        // Neither particle is on top
        NoRestingDependency
    };
 
    class FPBDCollisionConstraintHandle : public TIntrusiveConstraintHandle<FPBDCollisionConstraint>
    {
    public:
        using Base = TIntrusiveConstraintHandle<FPBDCollisionConstraint>;
        using FImplicitPair = TPair<const FImplicitObject*, const FImplicitObject*>;
        using FGeometryPair = TPair<const TGeometryParticleHandle<FReal, 3>*, const TGeometryParticleHandle<FReal, 3>*>;
        using FHandleKey = TPair<FImplicitPair, FGeometryPair>;
 
        FPBDCollisionConstraintHandle()
            : TIntrusiveConstraintHandle<FPBDCollisionConstraint>()
        {
        }
 
        const FPBDCollisionConstraint& GetContact() const;
        FPBDCollisionConstraint& GetContact();
 
        UE_DEPRECATED(4.27, "Use GetContact()")
        const FPBDCollisionConstraint& GetPointContact() const { return GetContact(); }
 
        UE_DEPRECATED(4.27, "Use GetContact()")
        FPBDCollisionConstraint& GetPointContact() { return GetContact(); }
 
        UE_DEPRECATED(4.27, "Use GetContact()")
        const FPBDCollisionConstraint& GetSweptPointContact() const { return GetContact(); }
 
        UE_DEPRECATED(4.27, "Use GetContact()")
        FPBDCollisionConstraint& GetSweptPointContact() { return GetContact(); }
 
        bool GetCCDEnabled() const;
 
        virtual void SetEnabled(bool InEnabled) override final;
 
        virtual bool IsEnabled() const override final;
 
        virtual bool IsProbe() const override final;
 
        FVec3 GetAccumulatedImpulse() const;
 
        // Declared final so that TPBDConstraintGraphRuleImpl::AddToGraph() does not need to hit vtable
        virtual FParticlePair GetConstrainedParticles() const override final;
 
        const FPBDCollisionConstraints* ConcreteContainer() const;
        FPBDCollisionConstraints* ConcreteContainer();
 
        static CHAOS_API const FConstraintHandleTypeID& StaticType();
    };
 
}