GEOS  3.8.0dev
LengthLocationMap.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/LengthLocationMap.java r463
18  *
19  **********************************************************************/
20 
21 #ifndef GEOS_LINEARREF_LENGTHLOCATIONMAP_H
22 #define GEOS_LINEARREF_LENGTHLOCATIONMAP_H
23 
24 #include <geos/geom/Coordinate.h>
25 #include <geos/geom/Geometry.h>
26 #include <geos/linearref/LinearLocation.h>
27 
28 namespace geos {
29 namespace linearref { // geos::linearref
30 
38 
39 
40 private:
41  const geom::Geometry* linearGeom;
42 
43  LinearLocation getLocationForward(double length) const;
44 
45  LinearLocation resolveHigher(const LinearLocation& loc) const;
46 
47 public:
48 
49  // TODO: cache computed cumulative length for each vertex
50  // TODO: support user-defined measures
51  // TODO: support measure index for fast mapping to a location
52 
62  static LinearLocation
63  getLocation(const geom::Geometry* linearGeom, double length)
64  {
65  LengthLocationMap locater(linearGeom);
66  return locater.getLocation(length);
67  }
68 
80  static LinearLocation
81  getLocation(const geom::Geometry* linearGeom, double length, bool resolveLower)
82  {
83  LengthLocationMap locater(linearGeom);
84  return locater.getLocation(length, resolveLower);
85  }
86 
95  static double getLength(const geom::Geometry* linearGeom, const LinearLocation& loc);
96 
97  LengthLocationMap(const geom::Geometry* linearGeom);
98 
113  LinearLocation getLocation(double length, bool resolveLower) const;
114 
126  LinearLocation getLocation(double length) const;
127 
128  double getLength(const LinearLocation& loc) const;
129 
130 };
131 
132 } // geos.linearref
133 } // geos
134 
135 #endif
static LinearLocation getLocation(const geom::Geometry *linearGeom, double length)
Computes the LinearLocation for a given length along a linear Geometry.
Definition: LengthLocationMap.h:63
static double getLength(const geom::Geometry *linearGeom, const LinearLocation &loc)
static LinearLocation getLocation(const geom::Geometry *linearGeom, double length, bool resolveLower)
Computes the LinearLocation for a given length along a linear [Geometry].
Definition: LengthLocationMap.h:81
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
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:25
Definition: LengthLocationMap.h:37