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/*
   render/model.h
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#ifndef __INCLUDED_CORE_MODEL_H__
#define __INCLUDED_CORE_MODEL_H__

#include <vector>
#include <map>
#include <list>

#include "math/mathlib.h"
#include "math/plane3f.h"
#include "core/entity.h"

namespace core
{

/// one face (polygon) of a model
class Face {
public:
	Face(math::Vector3f const & normal, math::Color const *color=0);
	~Face();

	/// the normal of this face
	inline math::Vector3f const & normal() const { return face_normal; };

	/// the color of this face
	inline math::Color const *color() const { return face_color; };

	/// add a vertex to the face
	void add_vertex(math::Vector3f const &vertex);

	/// face vertexes
	std::vector<math::Vector3f *> 	face_vertex;

private:
	math::Vector3f 			face_normal;
	math::Color			*face_color;
	
};

/// a spacecraft engine
class Engine
{
public:
	Engine(math::Vector3f const & location);
	~Engine();
	
	inline math::Vector3f const & location() const
	{
		return engine_location;
	}
	
private:
	math::Vector3f		engine_location;
};

/// an exterior light
class Light
{
public:
	Light(math::Vector3f const & location, math::Color const & color);
	~Light();
	
	inline math::Vector3f const & location() const { return light_location; }

	inline math::Color const & color() const { return light_color; };
	
private:
	math::Vector3f		light_location;
	math::Color		light_color;
};
	

/// a 3D model contains a list of faces
class Model
{
public:
	/// load a model from disk
	Model(std::string const & name);
	~Model();
	
	/// the name of the model
	inline std::string const & name() const
	{
		return model_name;
	}

	/// maximum values of the bounding box
	inline math::Vector3f const & maxbbox() const { return model_maxbbox; }
	
	/// minimum values of the bounding box
	inline math::Vector3f const & minbbox() const { return model_minbbox; }

	/// radius
	inline float radius() const { return model_radius; }

	/// the Model registry
	static std::map<std::string, Model*> registry;
	
	/* ---- static functions for the Model registry -------------------- */
	
	/// get name model, returns 0 if not found
	static Model *find(std::string const & name);
	
	/// get named model from the registry and load it if necessary
	static Model *get(std::string const & name);
	
	/// clear the model registry
	static void clear();
	
	/// list the content of the model registry
	static void list();

	/// list of Faces
	std::list<Face *>	model_face;

	/// list of Engines
	std::list<Engine *>	model_engine;

	/// list of Lights
	std::list<Light   *>	model_light;

private:
	void make_face(math::Plane3f *face, std::vector<math::Plane3f *> & planes);
	void add_engine(Engine *engine);
	void add_face(Face *face);
	void add_light(Light *light);
	
	std::string		model_name;
	
	float			model_radius;
	float			model_scale;
	bool			model_valid;

	math::Vector3f		model_maxbbox;
	math::Vector3f		model_minbbox;
};

}

#endif // __INCLUDED_RENDER_MODEL_H__