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/**********************************************************************
* $Id: Octant.cpp 1820 2006-09-06 16:54:23Z mloskot $
*
* GEOS - Geometry Engine Open Source
* http://geos.refractions.net
*
* Copyright (C) 2006 Refractions Research Inc.
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU Lesser General Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
**********************************************************************
*
* Last port: noding/Octant.java rev. 1.2 (JTS-1.7)
*
**********************************************************************/
#include <cmath>
#include <sstream>
#include <geos/util/IllegalArgumentException.h>
#include <geos/noding/Octant.h>
#include <geos/geom/Coordinate.h>
//using namespace std;
using namespace geos::geom;
namespace geos {
namespace noding { // geos.noding
/*public static*/
int
Octant::octant(double dx, double dy)
{
if (dx == 0.0 && dy == 0.0)
{
std::ostringstream s;
s<<"Cannot compute the octant for point ( "<<dx<<", "<<dy<<" )";
throw util::IllegalArgumentException(s.str());
}
double adx = fabs(dx);
double ady = fabs(dy);
if (dx >= 0) {
if (dy >= 0) {
if (adx >= ady)
return 0;
else
return 1;
}
else { // dy < 0
if (adx >= ady)
return 7;
else
return 6;
}
}
else { // dx < 0
if (dy >= 0) {
if (adx >= ady)
return 3;
else
return 2;
}
else { // dy < 0
if (adx >= ady)
return 4;
else
return 5;
}
}
}
/*public static*/
int
Octant::octant(const Coordinate& p0, const Coordinate& p1)
{
double dx = p1.x - p0.x;
double dy = p1.y - p0.y;
if (dx == 0.0 && dy == 0.0)
{
std::ostringstream s;
s<<"Cannot compute the octant for "<<"two identical points "<<p0.toString();
throw util::IllegalArgumentException(s.str());
}
return octant(dx, dy);
}
} // namespace geos.noding
} // namespace geos
/**********************************************************************
* $Log$
* Revision 1.6 2006/03/20 11:42:28 strk
* Added missing <cmath> include
*
* Revision 1.5 2006/03/15 09:51:12 strk
* streamlined headers usage
*
* Revision 1.4 2006/03/06 19:40:47 strk
* geos::util namespace. New GeometryCollection::iterator interface, many cleanups.
*
* Revision 1.3 2006/03/03 10:46:21 strk
* Removed 'using namespace' from headers, added missing headers in .cpp files, removed useless includes in headers (bug#46)
*
* Revision 1.2 2006/02/19 19:46:49 strk
* Packages <-> namespaces mapping for most GEOS internal code (uncomplete, but working). Dir-level libs for index/ subdirs.
*
* Revision 1.1 2006/02/14 13:28:26 strk
* New SnapRounding code ported from JTS-1.7 (not complete yet).
* Buffer op optimized by using new snaprounding code.
* Leaks fixed in XMLTester.
*
**********************************************************************/
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