--- /dev/null
+/* === S I N F G =========================================================== */
+/*! \file template.h
+** \brief Template Header
+**
+** $Id: ducktransform_rotate.h,v 1.1.1.1 2005/01/07 03:34:36 darco Exp $
+**
+** \legal
+** Copyright (c) 2002 Robert B. Quattlebaum Jr.
+**
+** This software and associated documentation
+** are CONFIDENTIAL and PROPRIETARY property of
+** the above-mentioned copyright holder.
+**
+** You may not copy, print, publish, or in any
+** other way distribute this software without
+** a prior written agreement with
+** the copyright holder.
+** \endlegal
+*/
+/* ========================================================================= */
+
+/* === S T A R T =========================================================== */
+
+#ifndef __SINFG_STUDIO_DUCK_TRANSFORM_ROTATE_H
+#define __SINFG_STUDIO_DUCK_TRANSFORM_ROTATE_H
+
+/* === H E A D E R S ======================================================= */
+
+#include "duckmatic.h"
+#include <sinfg/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 sinfg::Transform
+{
+private:
+ sinfg::Angle angle;
+ sinfg::Vector origin;
+ sinfg::Real sin_val;
+ sinfg::Real cos_val;
+
+public:
+ Transform_Rotate(const sinfg::Angle& angle,const sinfg::Vector& origin=sinfg::Vector(0,0)):
+ angle(angle),
+ origin(origin),
+ sin_val(sinfg::Angle::sin(angle).get()),
+ cos_val(sinfg::Angle::cos(angle).get())
+ {
+ }
+
+ sinfg::Vector perform(const sinfg::Vector& x)const
+ {
+ sinfg::Point pos(x-origin);
+ return sinfg::Point(cos_val*pos[0]-sin_val*pos[1],sin_val*pos[0]+cos_val*pos[1])+origin;
+ }
+ sinfg::Vector unperform(const sinfg::Vector& x)const
+ {
+ sinfg::Point pos(x-origin);
+ return sinfg::Point(cos_val*pos[0]+sin_val*pos[1],-sin_val*pos[0]+cos_val*pos[1])+origin;
+ }
+};
+
+};
+
+/* === E N D =============================================================== */
+
+#endif