GEOS  3.9.0dev
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 
39 
40 
41 private:
42  const geom::Geometry* linearGeom;
43 
44  LinearLocation getLocationForward(double length) const;
45 
46  LinearLocation resolveHigher(const LinearLocation& loc) const;
47 
48 public:
49 
50  // TODO: cache computed cumulative length for each vertex
51  // TODO: support user-defined measures
52  // TODO: support measure index for fast mapping to a location
53 
63  static LinearLocation
64  getLocation(const geom::Geometry* linearGeom, double length)
65  {
66  LengthLocationMap locater(linearGeom);
67  return locater.getLocation(length);
68  }
69 
81  static LinearLocation
82  getLocation(const geom::Geometry* linearGeom, double length, bool resolveLower)
83  {
84  LengthLocationMap locater(linearGeom);
85  return locater.getLocation(length, resolveLower);
86  }
87 
96  static double getLength(const geom::Geometry* linearGeom, const LinearLocation& loc);
97 
98  LengthLocationMap(const geom::Geometry* linearGeom);
99 
114  LinearLocation getLocation(double length, bool resolveLower) const;
115 
127  LinearLocation getLocation(double length) const;
128 
129  double getLength(const LinearLocation& loc) const;
130 
131 };
132 
133 } // geos.linearref
134 } // geos
135 
136 #endif
static LinearLocation getLocation(const geom::Geometry *linearGeom, double length)
Computes the LinearLocation for a given length along a linear Geometry.
Definition: LengthLocationMap.h:64
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:82
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:26
Computes the LinearLocation for a given length along a linear Geometry.
Definition: LengthLocationMap.h:38