/*
   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 "math/vector3f.h"
#include "math/color.h"

namespace model
{

/// a fragment of a model, a pointer into a continuues part of the VertexArray containt Tris or Quad data
class Fragment
{
public:
	/// fragment primitive type: triangles or quads
	enum Type {Triangles, Quads};

	/// create a new fragment
	Fragment (Type type, unsigned int material);

	/// add a vertex to the fragment
	size_t add_vertex(math::Vector3f const & vertex, math::Vector3f const &normal, math::Color const & color, bool detail);

	/// VertexArray index of the start of the fragment
	inline size_t start() const { return fragment_start; }

	/// 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 unsigned int material() { return fragment_material; }

private:
	Type			fragment_type;
	size_t			fragment_start;
	size_t			fragment_structural_size;
	size_t			fragment_detail_size;
	unsigned int		fragment_material;
};

}

#endif // __INCLUDED_MODEL_FRAGMENT_H__