Line data    Source code

       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/numeric/ftools.hxx>
      21             : #include <algorithm>
      22             : 
      23             : namespace basegfx
      24             : {
      25           6 :     double snapToNearestMultiple(double v, const double fStep)
      26             :     {
      27           6 :         if(fTools::equalZero(fStep))
      28             :         {
      29             :             // with a zero step, all snaps to 0.0
      30           0 :             return 0.0;
      31             :         }
      32             :         else
      33             :         {
      34           6 :             const double fHalfStep(fStep * 0.5);
      35           6 :             const double fChange(fHalfStep - fmod(v + fHalfStep, fStep));
      36             : 
      37           6 :             if(basegfx::fTools::equal(fabs(v), fabs(fChange)))
      38             :             {
      39           6 :                 return 0.0;
      40             :             }
      41             :             else
      42             :             {
      43           0 :                 return v + fChange;
      44             :             }
      45             :         }
      46             :     }
      47             : } // end of namespace basegfx
      48             : 
      49             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */