--- /dev/null
+/* === 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>
+
+/* === 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::Angle& angle,const synfig::Vector& origin=synfig::Vector(0,0)):
+ 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;
+ }
+};
+
+};
+
+/* === E N D =============================================================== */
+
+#endif