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#pragma once
#ifndef VPVL2_EXTENSIONS_WORLD_H_
#define VPVL2_EXTENSIONS_WORLD_H_

#include <vpvl2/Common.h>

/* Bullet Physics */
#include <BulletCollision/CollisionDispatch/btDefaultCollisionConfiguration.h>

struct btDbvtBroadphase;
class btCollisionDispatcher;
class btDiscreteDynamicsWorld;
class btRigidBody;
class btSequentialImpulseConstraintSolver;

namespace vpvl2
{
class IModel;

namespace extensions
{

class VPVL2_API World {
public:
    static const int kDefaultMaxSubSteps;

    World();
    ~World();

    const Vector3 gravity() const;
    btDiscreteDynamicsWorld *dynamicWorldRef() const;
    void setGravity(const Vector3 &value);
    unsigned long randSeed() const;
    Scalar motionFPS() const;
    Scalar fixedTimeStep() const;
    int maxSubSteps() const;
    void setRandSeed(unsigned long value);
    void setPreferredFPS(const Scalar &value) ;
    void setMaxSubSteps(int value);
    void addRigidBody(btRigidBody *value);
    void removeRigidBody(btRigidBody *value);
    void stepSimulation(const Scalar &delta);

private:
    btDefaultCollisionConfiguration m_config;
    btCollisionDispatcher *m_dispatcher;
    btDbvtBroadphase *m_broadphase;
    btSequentialImpulseConstraintSolver *m_solver;
    btDiscreteDynamicsWorld *m_world;
    Scalar m_motionFPS;
    Scalar m_fixedTimeStep;
    int m_maxSubSteps;

    VPVL2_DISABLE_COPY_AND_ASSIGN(World)
};

} /* namespace extensions */
} /* namespace vpvl2 */

#endif
