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#ifndef __BODYSYSTEMCPU_H__
#define __BODYSYSTEMCPU_H__

#include "bodysystem.h"

// CPU Body System
template <typename T> class BodySystemCPU : public BodySystem<T>
{
public:
    BodySystemCPU(int numBodies);
    virtual ~BodySystemCPU();

    virtual void loadTipsyFile(const std::string &filename);

    virtual void update(T deltaTime);

    virtual void setSoftening(T softening) { m_softeningSquared = softening * softening; }
    virtual void setDamping(T damping) { m_damping = damping; }

    virtual T   *getArray(BodyArray array);
    virtual void setArray(BodyArray array, const T *data);

    virtual unsigned int getCurrentReadBuffer() const { return 0; }

    virtual unsigned int getNumBodies() const { return m_numBodies; }

protected:             // methods
    BodySystemCPU() {} // default constructor

    virtual void _initialize(int numBodies);
    virtual void _finalize();

    void _computeNBodyGravitation();
    void _integrateNBodySystem(T deltaTime);

protected: // data
    int  m_numBodies;
    bool m_bInitialized;

    T *m_pos;
    T *m_vel;
    T *m_force;

    T m_softeningSquared;
    T m_damping;
};

#include "bodysystemcpu_impl.h"

#endif // __BODYSYSTEMCPU_H__
