1 /* === S Y N F I G ========================================================= */
2 /*! \file ducktransform_scale.h
3 ** \brief Template Header
8 ** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
10 ** This package is free software; you can redistribute it and/or
11 ** modify it under the terms of the GNU General Public License as
12 ** published by the Free Software Foundation; either version 2 of
13 ** the License, or (at your option) any later version.
15 ** This package is distributed in the hope that it will be useful,
16 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 ** General Public License for more details.
21 /* ========================================================================= */
23 /* === S T A R T =========================================================== */
25 #ifndef __SYNFIG_STUDIO_DUCK_TRANSFORM_SCALE_H
26 #define __SYNFIG_STUDIO_DUCK_TRANSFORM_SCALE_H
28 /* === H E A D E R S ======================================================= */
30 #include "duckmatic.h"
32 /* === M A C R O S ========================================================= */
34 /* === T Y P E D E F S ===================================================== */
36 /* === C L A S S E S & S T R U C T S ======================================= */
40 class Transform_Scale : public synfig::Transform
44 synfig::Vector origin;
46 Transform_Scale(const synfig::GUID& guid, const synfig::Vector& scale,const synfig::Vector& origin=synfig::Vector(0,0)):
47 Transform(guid), scale(scale), origin(origin) { }
48 synfig::Vector perform(const synfig::Vector& x)const { return synfig::Vector((x[0]-origin[0])*scale[0]+origin[0],(x[1]-origin[1])*scale[1]+origin[1]); }
49 synfig::Vector unperform(const synfig::Vector& x)const { return synfig::Vector((x[0]-origin[0])/scale[0]+origin[0],(x[1]-origin[1])/scale[1]+origin[1]); }
54 /* === E N D =============================================================== */