1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/**********************************************************************
* $Id: FuzzyPointLocator.cpp 1941 2006-12-13 10:55:55Z strk $
*
* GEOS - Geometry Engine Open Source
* http://geos.refractions.net
*
* Copyright (C) 2006 Refractions Research Inc.
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU Lesser General Public Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
***********************************************************************
*
* Last port: operation/overlay/validate/FuzzyPointLocator.java rev. 1.1
* (we should move in GEOS too, probably)
*
**********************************************************************/
#include <geos/operation/overlay/FuzzyPointLocator.h>
#include <geos/geom/Geometry.h>
#include <geos/geom/Point.h> // for Point upcast
#include <geos/geom/GeometryFactory.h>
#include <geos/geom/Location.h> // for Location::Value enum
#include <cassert>
#include <functional>
#include <vector>
#include <sstream>
#include <memory> // for auto_ptr
#ifndef GEOS_DEBUG
#define GEOS_DEBUG 0
#endif
#define COMPUTE_Z 1
#define USE_ELEVATION_MATRIX 1
#define USE_INPUT_AVGZ 0
using namespace std;
using namespace geos::geom;
using namespace geos::algorithm;
namespace geos {
namespace operation { // geos.operation
namespace overlay { // geos.operation.overlay
FuzzyPointLocator::FuzzyPointLocator(const geom::Geometry& geom,
double nTolerance)
:
g(geom),
tolerance(nTolerance),
ptLocator(),
linework(extractLineWork(g))
{
}
/*private*/
std::auto_ptr<Geometry>
FuzzyPointLocator::extractLineWork(const geom::Geometry& geom)
{
vector<Geometry*>* lineGeoms = new vector<Geometry*>();
try { // geoms array will leak if an exception is thrown
for (size_t i=0, n=g.getNumGeometries(); i<n; ++i)
{
const Geometry* gComp = g.getGeometryN(i);
Geometry* lineGeom = NULL;
// only get linework for polygonal components
if (gComp->getDimension() == 2) {
lineGeom = gComp->getBoundary();
lineGeoms->push_back(lineGeom);
}
}
return std::auto_ptr<Geometry>(g.getFactory()->buildGeometry(lineGeoms));
} catch (...) { // avoid leaks
for (size_t i=0, n=lineGeoms->size(); i<n; ++i)
{
delete (*lineGeoms)[i];
}
delete lineGeoms;
throw;
}
}
/*private*/
std::auto_ptr<Geometry>
FuzzyPointLocator::getLineWork(const geom::Geometry& geom)
{
vector<Geometry*>* lineGeoms = new vector<Geometry*>();
try { // geoms array will leak if an exception is thrown
for (size_t i=0, n=g.getNumGeometries(); i<n; ++i)
{
const Geometry* gComp = g.getGeometryN(i);
Geometry* lineGeom;
if (gComp->getDimension() == 2) {
lineGeom = gComp->getBoundary();
}
else {
lineGeom = gComp->clone();
}
lineGeoms->push_back(lineGeom);
}
return std::auto_ptr<Geometry>(g.getFactory()->buildGeometry(lineGeoms));
} catch (...) { // avoid leaks
for (size_t i=0, n=lineGeoms->size(); i<n; ++i)
{
delete (*lineGeoms)[i];
}
delete lineGeoms;
throw;
}
}
/* public */
Location::Value
FuzzyPointLocator::getLocation(const Coordinate& pt)
{
auto_ptr<Geometry> point(g.getFactory()->createPoint(pt));
double dist = linework->distance(point.get());
// if point is close to boundary, it is considered
// to be on the boundary
if (dist < tolerance)
return Location::BOUNDARY;
// now we know point must be clearly inside or outside geometry,
// so return actual location value
// (the static_cast is needed because PointLocator doesn't cleanly
// return a Location::Value - it should !!)
return static_cast<Location::Value>(ptLocator.locate(pt, &g));
}
} // namespace geos.operation.overlay
} // namespace geos.operation
} // namespace geos
/**********************************************************************
* $Log$
**********************************************************************/
|
