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

/*!	\file ducktransform_rotate.h

**	\brief Template Header

**

**	$Id$

**

**	\legal

**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley

**

**	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_STUDIO_DUCK_TRANSFORM_ROTATE_H

#define __SYNFIG_STUDIO_DUCK_TRANSFORM_ROTATE_H

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

#include "duckmatic.h"

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

/* === 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 studio {

class Transform_Rotate : public synfig::Transform

{

private:

	//synfig::Angle angle;

	synfig::Vector origin;

	synfig::Real sin_val;

	synfig::Real cos_val;

public:

	Transform_Rotate(const synfig::GUID& guid, const synfig::Angle& angle,const synfig::Vector& origin=synfig::Vector(0,0)):

		Transform(guid),

		//angle(angle),

		origin(origin),

		sin_val(synfig::Angle::sin(angle).get()),

		cos_val(synfig::Angle::cos(angle).get())

	{

	}

	synfig::Vector perform(const synfig::Vector& x)const

	{

		synfig::Point pos(x-origin);

		return synfig::Point(cos_val*pos[0]-sin_val*pos[1],sin_val*pos[0]+cos_val*pos[1])+origin;

	}

	synfig::Vector unperform(const synfig::Vector& x)const

	{

		synfig::Point pos(x-origin);

		return synfig::Point(cos_val*pos[0]+sin_val*pos[1],-sin_val*pos[0]+cos_val*pos[1])+origin;

	}

	synfig::String get_string()const

	{

		return "duck rotate";

	}

};

};

/* === E N D =============================================================== */

#endif