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#ifndef PHYSICS_HH

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#define PHYSICS_HH

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#include "Vector.hh"

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#include <ClanLib/core.h>

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const uint16_t PHYSICS_TICK_MS = 10;

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// forward-declare

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class PhysicsObject;

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class PhysicsWorld {

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    friend class PhysicsObject;

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    private:

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        CL_Timer tick_timer;

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    protected:

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        std::vector<PhysicsObject*> objects;

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        Vector gravity;

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        Vector dimensions;

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        CL_SlotContainer slots;

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        PhysicsWorld (Vector gravity, Vector dimensions);

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    public:

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        void addObject (PhysicsObject *object);

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        void tick (void);

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};

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class PhysicsObject {

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    protected:

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        PhysicsWorld &world;

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        float mass;

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        Vector position;

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        Vector velocity;

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        PhysicsObject (PhysicsWorld &world, float mass, Vector position, Vector velocity);

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        virtual void applyForce (Vector force, uint16_t dt);

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        void updatePhysics (Vector position, Vector velocity);

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    private:

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        void updatePosition (void);

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    public:

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        Vector getPosition (void);

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        void tick (void);

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};

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#endif