basegfx/source/point/b2dpoint.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <basegfx/point/b2dpoint.hxx>
  21 #include <basegfx/matrix/b2dhommatrix.hxx>
  22 #include <basegfx/numeric/ftools.hxx>
  23
  24 namespace basegfx
  25 {
  26     B2DPoint& B2DPoint::operator=( const ::basegfx::B2DTuple& rPoint )
  27     {
  28         mfX = rPoint.getX();
  29         mfY = rPoint.getY();
  30         return *this;
  31     }
  32
  33     B2DPoint& B2DPoint::operator*=( const ::basegfx::B2DHomMatrix& rMat )
  34     {
  35         double fTempX(
  36             rMat.get(0, 0) * mfX +
  37             rMat.get(0, 1) * mfY +
  38             rMat.get(0, 2));
  39         double fTempY(
  40             rMat.get(1, 0) * mfX +
  41             rMat.get(1, 1) * mfY +
  42             rMat.get(1, 2));
  43
  44         if(!rMat.isLastLineDefault())
  45         {
  46             const double fOne(1.0);
  47             const double fTempM(
  48                 rMat.get(2, 0) * mfX +
  49                 rMat.get(2, 1) * mfY +
  50                 rMat.get(2, 2));
  51
  52             if(!fTools::equalZero(fTempM) && !fTools::equal(fOne, fTempM))
  53             {
  54                 fTempX /= fTempM;
  55                 fTempY /= fTempM;
  56             }
  57         }
  58
  59         mfX = fTempX;
  60         mfY = fTempY;
  61
  62         return *this;
  63     }
  64
  65     B2DPoint operator*( const ::basegfx::B2DHomMatrix& rMat, const B2DPoint& rPoint )
  66     {
  67         B2DPoint aRes( rPoint );
  68         return aRes *= rMat;
  69     }
  70 } // end of namespace basegfx
  71
  72 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */