GEOS  3.8.0dev
LengthIndexedLine.h
1 /**********************************************************************
2  *
3  * GEOS - Geometry Engine Open Source
4  * http://geos.osgeo.org
5  *
6  * Copyright (C) 2011 Sandro Santilli <strk@kbt.io>
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 namespace linearref { // geos::linearref
31 
44 class GEOS_DLL LengthIndexedLine {
45 private:
46  const geom::Geometry* linearGeom;
47  LinearLocation locationOf(double index) const;
48  LinearLocation locationOf(double index, bool resolveLower) const;
49  double positiveIndex(double index) const;
50 
51 public:
52 
60  LengthIndexedLine(const geom::Geometry* linearGeom);
61 
74  geom::Coordinate extractPoint(double index) const;
75 
76 
95  geom::Coordinate extractPoint(double index, double offsetDistance) const;
96 
108  std::unique_ptr<geom::Geometry> extractLine(double startIndex, double endIndex) const;
109 
110 
129  double indexOf(const geom::Coordinate& pt) const;
130 
154  double indexOfAfter(const geom::Coordinate& pt, double minIndex) const;
155 
166  double* indicesOf(const geom::Geometry* subLine) const;
167 
168 
179  double project(const geom::Coordinate& pt) const;
180 
185  double getStartIndex() const;
186 
191  double getEndIndex() const;
192 
199  bool isValidIndex(double index) const;
200 
201 
208  double clampIndex(double index) const;
209 };
210 }
211 }
212 #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:188
Represents a location along a LineString or MultiLineString.
Definition: LinearLocation.h:44
Supports linear referencing along a linear geom::Geometry using the length along the line as the inde...
Definition: LengthIndexedLine.h:44
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:25