basegfx/source/vector/b2ivector.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/vector/b2ivector.hxx>
  21 #include <basegfx/matrix/b2dhommatrix.hxx>
  22 #include <basegfx/numeric/ftools.hxx>
  23
  24 namespace basegfx
  25 {
  26     B2IVector& B2IVector::operator=( const ::basegfx::B2ITuple& rVec )
  27     {
  28         mnX = rVec.getX();
  29         mnY = rVec.getY();
  30         return *this;
  31     }
  32
  33     B2IVector& B2IVector::operator*=( const B2DHomMatrix& rMat )
  34     {
  35         mnX = fround( rMat.get(0,0)*mnX +
  36                       rMat.get(0,1)*mnY );
  37         mnY = fround( rMat.get(1,0)*mnX +
  38                       rMat.get(1,1)*mnY );
  39
  40         return *this;
  41     }
  42
  43     B2IVector& B2IVector::setLength(double fLen)
  44     {
  45         double fLenNow(std::hypot(mnX, mnY));
  46
  47         if(!::basegfx::fTools::equalZero(fLenNow))
  48         {
  49             const double fOne(1.0);
  50
  51             if(!::basegfx::fTools::equal(fOne, fLenNow))
  52             {
  53                 fLen /= fLenNow;
  54             }
  55
  56             mnX = fround( mnX*fLen );
  57             mnY = fround( mnY*fLen );
  58         }
  59
  60         return *this;
  61     }
  62
  63 } // end of namespace basegfx
  64
  65 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */