/usr/include/geos/geomgraph/Quadrant.h is in libgeos-dev 3.2.2-3ubuntu1.
This file is owned by root:root, with mode 0o644.
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* $Id: Quadrant.h 2557 2009-06-08 09:30:55Z strk $
*
* GEOS - Geometry Engine Open Source
* http://geos.refractions.net
*
* Copyright (C) 2005-2006 Refractions Research Inc.
* Copyright (C) 2001-2002 Vivid Solutions Inc.
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU Lesser General Public Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
**********************************************************************
*
* Last port: geomgraph/Quadrant.java rev. 1.8 (JTS-1.10)
*
**********************************************************************/
#ifndef GEOS_GEOMGRAPH_QUADRANT_H
#define GEOS_GEOMGRAPH_QUADRANT_H
#include <geos/export.h>
#include <string>
#include <geos/inline.h>
// Forward declarations
namespace geos {
namespace geom {
class Coordinate;
}
}
namespace geos {
namespace geomgraph { // geos.geomgraph
/**
* Utility functions for working with quadrants, which are numbered as follows:
* <pre>
* 1 | 0
* --+--
* 2 | 3
* <pre>
*
*/
class GEOS_DLL Quadrant {
public:
static const int NE = 0;
static const int NW = 1;
static const int SW = 2;
static const int SE = 3;
/**
* Returns the quadrant of a directed line segment
* (specified as x and y displacements, which cannot both be 0).
*
* @throws IllegalArgumentException if the displacements are both 0
*/
static int quadrant(double dx, double dy);
/**
* Returns the quadrant of a directed line segment from p0 to p1.
*
* @throws IllegalArgumentException if the points are equal
*/
static int quadrant(const geom::Coordinate& p0,
const geom::Coordinate& p1);
/**
* Returns true if the quadrants are 1 and 3, or 2 and 4
*/
static bool isOpposite(int quad1, int quad2);
/*
* Returns the right-hand quadrant of the halfplane defined by
* the two quadrants,
* or -1 if the quadrants are opposite, or the quadrant if they
* are identical.
*/
static int commonHalfPlane(int quad1, int quad2);
/**
* Returns whether the given quadrant lies within the given halfplane
* (specified by its right-hand quadrant).
*/
static bool isInHalfPlane(int quad, int halfPlane);
/**
* Returns true if the given quadrant is 0 or 1.
*/
static bool isNorthern(int quad);
};
} // namespace geos.geomgraph
} // namespace geos
//#ifdef GEOS_INLINE
//# include "geos/geomgraph/Quadrant.inl"
//#endif
#endif // ifndef GEOS_GEOMGRAPH_QUADRANT_H
/**********************************************************************
* $Log$
* Revision 1.2 2006/03/24 09:52:41 strk
* USE_INLINE => GEOS_INLINE
*
* Revision 1.1 2006/03/09 16:46:49 strk
* geos::geom namespace definition, first pass at headers split
*
**********************************************************************/
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