GEOS  3.6.1
LengthIndexedLine.h
1 /**********************************************************************
2  *
3  * GEOS - Geometry Engine Open Source
4  * http://geos.osgeo.org
5  *
6  * Copyright (C) 2011 Sandro Santilli <strk@keybit.net>
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/LengthIndexedLine.java r463
18  *
19  **********************************************************************/
20 
21 #ifndef GEOS_LINEARREF_LENGTHINDEXEDLINE_H
22 #define GEOS_LINEARREF_LENGTHINDEXEDLINE_H
23 
24 #include <geos/export.h>
25 #include <geos/geom/Coordinate.h>
26 #include <geos/geom/Geometry.h>
27 #include <geos/linearref/LinearLocation.h>
28 
29 namespace geos
30 {
31 namespace linearref // geos::linearref
32 {
33 
45 class GEOS_DLL LengthIndexedLine
46 {
47 private:
48  const geom::Geometry *linearGeom;
49  LinearLocation locationOf(double index) const;
50  LinearLocation locationOf(double index, bool resolveLower) const;
51  double positiveIndex(double index) const;
52 
53 public:
54 
62  LengthIndexedLine(const geom::Geometry *linearGeom);
63 
75  geom::Coordinate extractPoint(double index) const;
76 
77 
96  geom::Coordinate extractPoint(double index, double offsetDistance) const;
97 
108  geom::Geometry *extractLine(double startIndex, double endIndex) const;
109 
110 
128  double indexOf(const geom::Coordinate& pt) const;
129 
152  double indexOfAfter(const geom::Coordinate& pt, double minIndex) const;
153 
163  double* indicesOf(const geom::Geometry *subLine) const;
164 
165 
175  double project(const geom::Coordinate& pt) const;
176 
181  double getStartIndex() const;
182 
187  double getEndIndex() const;
188 
195  bool isValidIndex(double index) const;
196 
197 
204  double clampIndex(double index) const;
205 };
206 }
207 }
208 #endif
Coordinate is the lightweight class used to store coordinates.
Definition: Coordinate.h:60
Basic implementation of Geometry, constructed and destructed by GeometryFactory.
Definition: Geometry.h:167
Represents a location along a LineString or MultiLineString.
Definition: LinearLocation.h:43
Supports linear referencing along a linear Geometry using the length along the line as the index...
Definition: LengthIndexedLine.h:45
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:25