VectorTransformation2D.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* libmspub
00003  * Version: MPL 1.1 / GPLv2+ / LGPLv2+
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License or as specified alternatively below. You may obtain a copy of
00008  * the License at http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * Major Contributor(s):
00016  * Copyright (C) 2012 Brennan Vincent <brennanv@email.arizona.edu>
00017  *
00018  * All Rights Reserved.
00019  *
00020  * For minor contributions see the git repository.
00021  *
00022  * Alternatively, the contents of this file may be used under the terms of
00023  * either the GNU General Public License Version 2 or later (the "GPLv2+"), or
00024  * the GNU Lesser General Public License Version 2 or later (the "LGPLv2+"),
00025  * in which case the provisions of the GPLv2+ or the LGPLv2+ are applicable
00026  * instead of those above.
00027  */
00028 
00029 #ifndef __VECTORTRANSFORMATION2D_H__
00030 #define __VECTORTRANSFORMATION2D_H__
00031 
00032 namespace libmspub
00033 {
00034 struct Vector2D
00035 {
00036   double m_x;
00037   double m_y;
00038   Vector2D(double x, double y) : m_x(x), m_y(y)
00039   {
00040   }
00041 };
00042 Vector2D operator+(const Vector2D &l, const Vector2D &r);
00043 Vector2D operator-(const Vector2D &l, const Vector2D &r);
00044 class VectorTransformation2D
00045 {
00046   double m_m11, m_m12, m_m21, m_m22;
00047   double m_x, m_y;
00048 public:
00049   VectorTransformation2D();
00050   Vector2D transform(Vector2D original) const;
00051   Vector2D transformWithOrigin(Vector2D v, Vector2D origin) const;
00052   double getRotation() const;
00053   double getHorizontalScaling() const;
00054   double getVerticalScaling() const;
00055   friend VectorTransformation2D operator*(const VectorTransformation2D &l, const VectorTransformation2D &r);
00056   static VectorTransformation2D fromFlips(bool flipH, bool flipV);
00057   static VectorTransformation2D fromTranslate(double x, double y);
00058   static VectorTransformation2D fromCounterRadians(double theta);
00059 };
00060 VectorTransformation2D operator*(const VectorTransformation2D &l, const VectorTransformation2D &r);
00061 } // namespace libmspub
00062 
00063 #endif /* __VECTORTRANSFORMATION2D_H__ */
00064 /* vim:set shiftwidth=2 softtabstop=2 expandtab: */