/* === S Y N F I G ========================================================= */

/*!	\file synfig/rendering/primitive/bend.h

**	\brief Bend Header

**

**	$Id$

**

**	\legal

**	......... ... 2019 Ivan Mahonin

**

**	This package is free software; you can redistribute it and/or

**	modify it under the terms of the GNU General Public License as

**	published by the Free Software Foundation; either version 2 of

**	the License, or (at your option) any later version.

**

**	This package is distributed in the hope that it will be useful,

**	but WITHOUT ANY WARRANTY; without even the implied warranty of

**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

**	General Public License for more details.

**	\endlegal

*/

/* ========================================================================= */

/* === S T A R T =========================================================== */

#ifndef __SYNFIG_RENDERING_BEND_H

#define __SYNFIG_RENDERING_BEND_H

/* === H E A D E R S ======================================================= */

#include <vector></vector>

#include <etl handle=""></etl>

#include <synfig vector.h=""></synfig>

#include <synfig matrix.h=""></synfig>

#include "contour.h"

/* === M A C R O S ========================================================= */

/* === T Y P E D E F S ===================================================== */

/* === C L A S S E S & S T R U C T S ======================================= */

namespace synfig

{

namespace rendering

{

class Bend: public etl::shared_object

{

public:

	typedef etl::handle<bend> Handle;</bend>

	enum Mode

	{

		NONE   = 0,

		FLAT   = 1,

		ROUND  = 2,

		CORNER = 3

	};

	typedef unsigned int Hints;

	class Point {

	public:

		Vector p;

		Vector t0, t1;

		Vector tn0, tn1;

		Mode mode;

		bool e0, e1;

		Real l;

		Real length;

		Point(): mode(NONE), e0(), e1(), l(), length() { }

	};

	typedef std::vector<point> PointList;</point>

	PointList points;

	void add(const Vector &p, const Vector &t0, const Vector &t1, Mode mode, bool calc_length, int segments);

	void loop(bool calc_length, int segments);

	void tails();

	Real l0() const

		{ return points.empty() ? Real() : points.front().l; }

	Real l1() const

		{ return points.empty() ? Real() : points.back().l; }

	Real length0() const

		{ return points.empty() ? Real() : points.front().length; }

	Real length1() const

		{ return points.empty() ? Real() : points.back().length; }

	PointList::const_iterator find_by_l(Real l) const;

	PointList::const_iterator find(Real length) const;

	Real length_by_l(Real length) const;

	Point interpolate(Real length) const;

	void bend(Contour &dst, const Contour &src, const Matrix &matrix, int segments) const;

};

} /* end namespace rendering */

} /* end namespace synfig */

/* -- E N D ----------------------------------------------------------------- */

#endif