/*
   model/fragment.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_MODEL_FRAGMENT_H__
#define __INCLUDED_MODEL_FRAGMENT_H__

#include <list>

#include "math/axis.h"
#include "math/vector3f.h"
#include "math/vector2f.h"
#include "model/material.h"

namespace model
{

/// a fragment of a model, a pointer into a continuous part of the VertexArray containing tris or quads
class Fragment
{
public:
	/// fragment primitive type: triangles or quads
	enum Type {Triangles, Quads};
	
	/// create a new fragment
	Fragment(Type type, const Material *material);

	/**
	 * @brief copy constructor
	 */
	Fragment(const Fragment &other);
	
	/// add a vertex to the fragment
	size_t add_vertex(math::Vector3f const & vertex, math::Vector3f const &normal, bool detail);

	/// add a vertex to the fragment
	size_t add_vertex(math::Vector3f const & vertex, math::Vector3f const &normal, math::Vector2f const &texcoord, bool detail);
	
	/// the type of primitives this fragment consists of
	inline Type type() const
	{
		return fragment_type;
	}
	
	/// VertexArray index of the start of the fragment
	inline size_t index() const
	{
		return fragment_index;
	}
	
	/// number of structural vertices in the fragment
	inline size_t structural_size() const
	{
		return fragment_structural_size;
	}
	
	/// number of detail vertices in the fragment
	inline size_t detail_size() const
	{
		return fragment_detail_size;
	}
	
	/// material flags
	inline const Material * material() const
	{
		return fragment_material;
	}
	
private:
	Type			fragment_type;
	size_t			fragment_index;
	size_t			fragment_structural_size;
	size_t			fragment_detail_size;
	const Material *	fragment_material;
};

/// a collection of fragments
/**
 * a FragmentGroup contains the model fragments for one class in the .map file.
 * worldspawn is a FragmentGroup
 */
class FragmentGroup
{
public:
	enum Type {None = 0, Rotate = 1, Door = 2 };

	typedef std::list<Fragment *>::iterator iterator;

	FragmentGroup();

	~FragmentGroup();

	inline const Type type() const { return group_type; }

	inline const math::Vector3f &location() const { return group_location; }

	inline const math::Axis & axis() const { return group_axis; }

	inline const float speed() const { return group_speed; }

	inline const float scale() const { return group_scale; }
	
	inline const bool transform() const { return group_transform; }

	
	inline void set_type(const Type type) { group_type = type; }

	inline void set_location(const math::Vector3f &location) { group_location.assign(location); }

	inline void set_axis(const math::Axis &axis) { group_axis.assign(axis); }

	inline void set_speed(const float speed) { group_speed = speed; }

	inline void set_scale(const float scale) { group_scale = scale; }

	inline void set_transform(const bool transform) { group_transform = transform; }
	
	inline iterator begin() { return  group_fragments.begin(); }

	inline iterator end() { return group_fragments.end(); }
	
	inline const size_t size() const { return group_fragments.size(); }
	
	inline void add_fragment(Fragment *fragment) { group_fragments.push_back(fragment); }

	void clear();

private:
	/// type definition for a list of model fragments
	typedef std::list<Fragment *> Fragments;

	Fragments		group_fragments;
	math::Vector3f		group_location;
	math::Axis		group_axis;

	Type			group_type;
	float			group_speed;
	float			group_scale;

	bool			group_transform;
};

}

#endif // __INCLUDED_MODEL_FRAGMENT_H__