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.
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   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     double B2IVector::scalar( const B2IVector& rVec ) const
  34     {
  35         return((mnX * rVec.mnX) + (mnY * rVec.mnY));
  36     }
  37
  38     B2IVector& B2IVector::operator*=( const B2DHomMatrix& rMat )
  39     {
  40         mnX = fround( rMat.get(0,0)*mnX +
  41                       rMat.get(0,1)*mnY );
  42         mnY = fround( rMat.get(1,0)*mnX +
  43                       rMat.get(1,1)*mnY );
  44
  45         return *this;
  46     }
  47
  48     B2IVector& B2IVector::setLength(double fLen)
  49     {
  50         double fLenNow(scalar(*this));
  51
  52         if(!::basegfx::fTools::equalZero(fLenNow))
  53         {
  54             const double fOne(1.0);
  55
  56             if(!::basegfx::fTools::equal(fOne, fLenNow))
  57             {
  58                 fLen /= sqrt(fLenNow);
  59             }
  60
  61             mnX = fround( mnX*fLen );
  62             mnY = fround( mnY*fLen );
  63         }
  64
  65         return *this;
  66     }
  67
  68     B2IVector operator*( const B2DHomMatrix& rMat, const B2IVector& rVec )
  69     {
  70         B2IVector aRes( rVec );
  71         return aRes*=rMat;
  72     }
  73
  74 } // end of namespace basegfx
  75
  76 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */