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include
geos
geomgraph
Quadrant.h
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/**********************************************************************
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*
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* GEOS - Geometry Engine Open Source
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* http://geos.osgeo.org
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*
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* Copyright (C) 2005-2006 Refractions Research Inc.
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* Copyright (C) 2001-2002 Vivid Solutions Inc.
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU Lesser General Public Licence as published
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* by the Free Software Foundation.
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* See the COPYING file for more information.
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*
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**********************************************************************
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*
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* Last port: geomgraph/Quadrant.java rev. 1.8 (JTS-1.10)
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*
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**********************************************************************/
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#ifndef GEOS_GEOMGRAPH_QUADRANT_H
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#define GEOS_GEOMGRAPH_QUADRANT_H
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#include <geos/export.h>
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#include <string>
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#include <geos/inline.h>
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// Forward declarations
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namespace
geos {
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namespace
geom {
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class
Coordinate;
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}
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}
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namespace
geos {
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namespace
geomgraph {
// geos.geomgraph
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class
GEOS_DLL
Quadrant
{
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public
:
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static
const
int
NE = 0;
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static
const
int
NW = 1;
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static
const
int
SW = 2;
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static
const
int
SE = 3;
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static
int
quadrant(
double
dx,
double
dy);
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static
int
quadrant(
const
geom::Coordinate
& p0,
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const
geom::Coordinate
& p1);
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static
bool
isOpposite(
int
quad1,
int
quad2);
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/*
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* Returns the right-hand quadrant of the halfplane defined by
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* the two quadrants,
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* or -1 if the quadrants are opposite, or the quadrant if they
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* are identical.
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*/
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static
int
commonHalfPlane(
int
quad1,
int
quad2);
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static
bool
isInHalfPlane(
int
quad,
int
halfPlane);
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static
bool
isNorthern(
int
quad);
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};
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}
// namespace geos.geomgraph
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}
// namespace geos
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#endif // ifndef GEOS_GEOMGRAPH_QUADRANT_H
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geos::geom::Coordinate
Coordinate is the lightweight class used to store coordinates.
Definition:
Coordinate.h:60
geos::geomgraph::Quadrant
Definition:
Quadrant.h:48
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