source: trunk/test/Physics/EasyPhysics.h @ 1632 Tweet

//
// Lol Engine
//
// Copyright: (c) 2010-2012 Sam Hocevar <sam@hocevar.net>
//            (c) 2009-2012 Benjamin Huet <huet.benjamin@gmail.com>
//   This program is free software; you can redistribute it and/or
//   modify it under the terms of the Do What The Fuck You Want To
//   Public License, Version 2, as published by Sam Hocevar. See
//   http://sam.zoy.org/projects/COPYING.WTFPL for more details.
//

//
// The EasyPhysic class
// ------------------
//

#if !defined __EASYPHYSICS_EASYPHYSICS_H__
#define __EASYPHYSICS_EASYPHYSICS_H__

#ifdef HAVE_PHYS_USE_BULLET
#include "core.h"
#include <bullet/btBulletDynamicsCommon.h>
#include <bullet/btBulletCollisionCommon.h>
#endif

namespace lol
{

namespace phys
{

class EasyPhysic
{

#ifdef HAVE_PHYS_USE_BULLET

public:
        EasyPhysic();
        ~EasyPhysic();

        void SetShapeToBox(lol::vec3& box_size);
        void SetShapeToSphere(float radius);
        void SetShapeToCone(float radius, float height);
        void SetShapeToCylinder(lol::vec3& cyl_size);
        void SetShapeToCapsule(float radius, float height);

        bool CanChangeCollisionChannel() { return (m_rigid_body == NULL); }
        void SetTransform(const lol::vec3& base_location, const lol::quat& base_rotation=lol::quat(lol::mat4(1.0f)));
        void SetMass(float mass);
        void InitBodyToRigid(bool ZeroMassIsKinematic=false);
        void AddToSimulation(class Simulation* current_simulation);
        mat4 GetTransform();

protected:
        void SetLocalInertia(float mass);
        void SetShapeTo(btCollisionShape* collision_shape);

        btCollisionObject*                                                      m_collision_object;

        btRigidBody*                                                            m_rigid_body;
        btVector3                                                                       m_local_inertia;

        btCollisionShape*                                                       m_collision_shape;
        btMotionState*                                                          m_motion_state;

#else  // NO PHYSIC IMPLEMENTATION

public:
        EasyPhysic() { }

        void SetShapeToBox(lol::vec3& BoxSize) { }
        void SetShapeToSphere(float radius) { }
        void SetShapeToCone(float radius, float height) { }
        void SetShapeToCylinder(lol::vec3& cyl_size) { }
        void SetShapeToCapsule(float radius, float height) { }

        bool CanChangeCollisionChannel() { return true; }
        void SetTransform(const lol::vec3& base_location, const lol::quat& base_rotation=lol::quat(lol::mat4(1.0f))) { }
        void SetMass(float mass) { }
        void InitBodyToRigid() { }
        void AddToSimulation(class Simulation* current_simulation) { }
        mat4 GetTransform() { return mat4(1.0f); }

#endif // PHYSIC IMPLEMENTATION

public:
        //Sets the collision Group & Mask.
        //Mask can change at runtime, not group !
        bool SetCollisionChannel(int NewGroup, int NewMask)
        {
                if (CanChangeCollisionChannel())
                {
                        m_collision_group = (1<<NewGroup);
                        m_collision_mask = NewMask;
                        return true;
                }
                return false;
        }
        int GetCollisionGroup() { return m_collision_group; }
        int GetCollisionMask()  { return m_collision_mask; }

protected:
        lol::mat4                                                                       m_local_to_world;
        float                                                                           m_mass;
        int                                                                                     m_collision_group;
        int                                                                                     m_collision_mask;
};

class EasyConstraint
{
        EasyConstraint()
        {
                //btPoint2PointConstraint(bA, bB, PivotA, PivotB)
                //btHingeConstraint(bA, bB, TransfA, TransfB, UseRefA)
                //btSliderConstraint(bA, bB, TransfA, TransfB, UseRefA)
                //btConeTwistConstraint(bA, bB, TransfA, TransfB)
                //btGeneric6DofConstraint(bA, bB, TransfA, TransfB, UseRefA)
        }

#ifdef HAVE_PHYS_USE_BULLET

        btTypedConstraint*                      m_typed_constraint;

#else  // NO PHYSIC IMPLEMENTATION

#endif // PHYSIC IMPLEMENTATION

};

} /* namespace phys */

} /* namespace lol */

#endif /* __EASYPHYSICS_EASYPHYSICS_H__ */