////  ObjectConstraintBallSocket.h//  libraries/physics/src////  Created by Seth Alves 2017-4-29//  Copyright 2017 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #ifndef hifi_ObjectConstraintBallSocket_h#define hifi_ObjectConstraintBallSocket_h #include "ObjectConstraint.h" // http://bulletphysics.org/Bullet/BulletFull/classbtBallSocketConstraint.html class ObjectConstraintBallSocket : public ObjectConstraint {public:    ObjectConstraintBallSocket(const QUuid& id, EntityItemPointer ownerEntity);    virtual ~ObjectConstraintBallSocket();     virtual void prepareForPhysicsSimulation() override;     virtual bool updateArguments(QVariantMap arguments) override;    virtual QVariantMap getArguments() override;     virtual QByteArray serialize() const override;    virtual void deserialize(QByteArray serializedArguments) override;     virtual QList<btRigidBody*> getRigidBodies() override;    virtual btTypedConstraint* getConstraint() override; protected:    static const uint16_t constraintVersion;     void updateBallSocket();     glm::vec3 _pivotInA;    glm::vec3 _pivotInB;}; #endif // hifi_ObjectConstraintBallSocket_h