TrianglePredicate.h

00001 /**********************************************************************
00002  *
00003  * GEOS - Geometry Engine Open Source
00004  * http://geos.osgeo.org
00005  *
00006  * Copyright (C) 2012 Excensus LLC.
00007  *
00008  * This is free software; you can redistribute and/or modify it under
00009  * the terms of the GNU Lesser General Licence as published
00010  * by the Free Software Foundation. 
00011  * See the COPYING file for more information.
00012  *
00013  **********************************************************************
00014  *
00015  * Last port: triangulate/quadedge/TrianglePredicate.java r524
00016  *
00017  **********************************************************************/
00018 
00019 #ifndef GEOS_TRIANGULATE_QUADEDGE_TRIANGLEPREDICATE_H
00020 #define GEOS_TRIANGULATE_QUADEDGE_TRIANGLEPREDICATE_H
00021 
00022 namespace geos {
00023 namespace geom { // geos.geom
00024 
00025 class Coordinate;
00026 
00041 class TrianglePredicate 
00042 {
00043 public:
00056   static bool isInCircleNonRobust(
00057           const Coordinate &a, const Coordinate &b, const Coordinate &c, 
00058           const Coordinate &p);
00059   
00077   static bool isInCircleNormalized(
00078           const Coordinate &a, const Coordinate &b, const Coordinate &c, 
00079           const Coordinate &p);
00080 
00081 private: 
00090   static double triArea(const Coordinate &a,
00091                   const Coordinate &b, const Coordinate &c);
00092 
00093 public:
00105   static bool isInCircleRobust(
00106           const Coordinate &a, const Coordinate &b, const Coordinate &c, 
00107           const Coordinate &p);
00108 } ;
00109 
00110 } // namespace geos.geom
00111 } // namespace geos
00112 
00113 #endif //GEOS_TRIANGULATE_QUADEDGE_TRIANGLEPREDICATE_H
00114 

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