physics.h

// Copyright © 2015, The Network Protocol Company, Inc. All Rights Reserved.

#ifndef PHYSICS_H
#define PHYSICS_H

#include <stdint.h>
#include "const.h"
#include "vectorial/vec3f.h"
#include "vectorial/quat4f.h"
#include <vector>						// todo: remove this!

using namespace vectorial;

enum PhysicsShape
{
	PHYSICS_SHAPE_CUBE
};

struct PhysicsObjectState
{
	PhysicsObjectState()
	{
		active = true;
		position = vec3f(0,0,0);
		orientation = quat4f(0,0,0,1);
		linear_velocity = vec3f(0,0,0);
		angular_velocity = vec3f(0,0,0);
	}

	bool active;
	vec3f position;
	quat4f orientation;
	vec3f linear_velocity;
	vec3f angular_velocity;
};

class PhysicsManager
{	
	static int * GetInitCount();

public:

	PhysicsManager();
	~PhysicsManager();

	void Initialize();

	void Update( uint64_t tick, double t, float dt, bool paused = false );

	int AddObject( int entity_index, const PhysicsObjectState & object_state, PhysicsShape shape, float scale );

	bool ObjectExists( int index );

	float GetObjectMass( int index );

	void RemoveObject( int index );
	
	void GetObjectState( int index, PhysicsObjectState & object_state ) const;

	void SetObjectState( int index, const PhysicsObjectState & object_state );

	bool IsActive( int index ) const;

	void ApplyForce( int index, const vec3f & force );

	void ApplyTorque( int index, const vec3f & torque );

	void AddPlane( const vec3f & normal, float d );

	void Reset();

	void WalkInteractions( struct EntityManager * entity_manager );

private:

	struct PhysicsInternal * internal;
};

#endif