GEOS  3.3.3
LengthIndexOfPoint.h
1 /**********************************************************************
2  * $Id: LengthIndexOfPoint.h 3012 2010-06-19 11:14:21Z strk $
3  *
4  * GEOS - Geometry Engine Open Source
5  * http://geos.refractions.net
6  *
7  * Copyright (C) 2005-2006 Refractions Research Inc.
8  * Copyright (C) 2001-2002 Vivid Solutions Inc.
9  *
10  * This is free software; you can redistribute and/or modify it under
11  * the terms of the GNU Lesser General Public Licence as published
12  * by the Free Software Foundation.
13  * See the COPYING file for more information.
14  *
15  **********************************************************************
16  *
17  * Last port: linearref/LengthIndexOfPoint.java rev. 1.10
18  *
19  **********************************************************************/
20 
21 #ifndef GEOS_LINEARREF_LENGTHINDEXOFPOINT_H
22 #define GEOS_LINEARREF_LENGTHINDEXOFPOINT_H
23 
24 #include <string>
25 
26 #include <geos/geom/Coordinate.h>
27 #include <geos/geom/Geometry.h>
28 #include <geos/geom/LineSegment.h>
29 #include <geos/linearref/LinearLocation.h>
30 
31 
32 namespace geos
33 {
34 namespace linearref // geos::linearref
35 {
36 
47 {
48 
49 private:
50  const geom::Geometry *linearGeom;
51 
52  double indexOfFromStart(const geom::Coordinate& inputPt, const double minIndex) const;
53 
54  double segmentNearestMeasure(const geom::LineSegment *seg,
55  const geom::Coordinate& inputPt,
56  double segmentStartMeasure) const;
57 public:
58  static double indexOf(const geom::Geometry *linearGeom, const geom::Coordinate& inputPt);
59 
60  static double indexOfAfter(const geom::Geometry *linearGeom, const geom::Coordinate& inputPt, double minIndex);
61 
62  LengthIndexOfPoint(const geom::Geometry *linearGeom);
63 
70  double indexOf(const geom::Coordinate& inputPt) const;
71 
87  double indexOfAfter(const geom::Coordinate& inputPt, double minIndex) const;
88 
89 };
90 }
91 }
92 #endif