src/geomgraph/Position.cpp

   1 /**********************************************************************
   2  *
   3  * GEOS - Geometry Engine Open Source
   4  * http://geos.osgeo.org
   5  *
   6  * Copyright (C) 2001-2002 Vivid Solutions Inc.
   7  * Copyright (C) 2005 Refractions Research Inc.
   8  *
   9  * This is free software; you can redistribute and/or modify it under
  10  * the terms of the GNU Lesser General Public Licence as published
  11  * by the Free Software Foundation.
  12  * See the COPYING file for more information.
  13  *
  14  **********************************************************************
  15  *
  16  * Last port: geomgraph/Position.java rev. 1.4 (JTS-1.10)
  17  *
  18  **********************************************************************/
  19
  20 #include <geos/geomgraph/Position.h>
  21
  22 #ifndef GEOS_DEBUG
  23 #define GEOS_DEBUG 0
  24 #endif
  25
  26 #ifdef GEOS_DEBUG
  27 #include <iostream>
  28 #endif
  29
  30 namespace geos {
  31 namespace geomgraph { // geos.geomgraph
  32
  33 /**
  34 * Returns LEFT if the position is RIGHT, RIGHT if the position is LEFT, or the position
  35 * otherwise.
  36 */
  37 int Position::opposite(int position){
  38         if (position==LEFT) return RIGHT;
  39         if (position==RIGHT) return LEFT;
  40 #if GEOS_DEBUG
  41         std::cerr<<"Position::opposite: position is neither LEFT ("<<LEFT<<") nor RIGHT ("<<RIGHT<<") but "<<position<<std::endl;
  42 #endif
  43         return position;
  44 }
  45
  46 } // namespace geos.geomgraph
  47 } // namespace geos