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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
//
// Test Suite for C-API GEOSPolygonize*
#include <tut/tut.hpp>
// geos
#include <geos_c.h>
#include "capi_test_utils.h"
namespace tut {
//
// Test Group
//
// Common data used in test cases.
struct test_capigeospolygonize_data : public capitest::utility {
};
typedef test_group<test_capigeospolygonize_data> group;
typedef group::object object;
group test_capigeospolygonize_group("capi::GEOSPolygonize");
//
// Test Cases
//
template<>
template<>
void object::test<1>
()
{
constexpr int size = 2;
GEOSGeometry* geoms[size] = { nullptr };
geoms[0] = GEOSGeomFromWKT("LINESTRING(1 3, 3 3, 3 1, 1 1, 1 3)");
geoms[1] = GEOSGeomFromWKT("LINESTRING(1 3, 3 3, 3 1, 1 1, 1 3)");
GEOSGeometry* g = GEOSPolygonizer_getCutEdges(geoms, size);
ensure(nullptr != g);
ensure_equals(GEOSGetNumGeometries(g), size);
GEOSGeom_destroy(g);
for(auto& input : geoms) {
GEOSGeom_destroy(input);
}
}
template<>
template<>
void object::test<2>
()
{
constexpr int size = 6;
GEOSGeometry* geoms[size] = { nullptr };
// Example from JTS Developer's Guide, Chapter 6 - Polygonization
geoms[0] = GEOSGeomFromWKT("LINESTRING(0 0, 10 10)"); // isolated edge
geoms[1] = GEOSGeomFromWKT("LINESTRING(185 221, 100 100)"); // dangling edge
geoms[2] = GEOSGeomFromWKT("LINESTRING(185 221, 88 275, 180 316)");
geoms[3] = GEOSGeomFromWKT("LINESTRING(185 221, 292 281, 180 316)");
geoms[4] = GEOSGeomFromWKT("LINESTRING(189 98, 83 187, 185 221)");
geoms[5] = GEOSGeomFromWKT("LINESTRING(189 98, 325 168, 185 221)");
GEOSGeometry* g = GEOSPolygonizer_getCutEdges(geoms, size);
ensure(nullptr != g);
ensure_equals(GEOSGetNumGeometries(g), 0);
GEOSGeom_destroy(g);
for(auto& input : geoms) {
GEOSGeom_destroy(input);
}
}
template<>
template<>
void object::test<3>
()
{
constexpr int size = 2;
GEOSGeometry* geoms[size];
geoms[0] = GEOSGeomFromWKT("LINESTRING (100 100, 100 300, 300 300, 300 100, 100 100)");
geoms[1] = GEOSGeomFromWKT("LINESTRING (150 150, 150 250, 250 250, 250 150, 150 150)");
// GEOSPolygonize gives us a collection of two polygons
GEOSGeometry* g = GEOSPolygonize(geoms, size);
ensure(nullptr != g);
ensure_equals(GEOSGetNumGeometries(g), 2);
ensure_equals(GEOSGeomTypeId(g), GEOS_GEOMETRYCOLLECTION);
GEOSGeom_destroy(g);
// GEOSPolygonize_valid gives us a single polygon with a hole
g = GEOSPolygonize_valid(geoms, 2);
ensure(nullptr != g);
ensure_equals(GEOSGetNumGeometries(g), 1);
ensure_equals(GEOSGeomTypeId(g), GEOS_POLYGON);
GEOSGeom_destroy(g);
for(auto& input : geoms) {
GEOSGeom_destroy(input);
}
}
template<>
template<>
void object::test<4>
()
{
constexpr int size = 1;
GEOSGeometry* geoms[size];
geoms[0] = GEOSGeomFromWKT("LINESTRING (0 0, 1 1)");
GEOSGeometry* g = GEOSPolygonize_valid(geoms, size);
ensure(nullptr != g);
ensure_equals(GEOSGetNumGeometries(g), 0);
ensure_equals(GEOSGeomTypeId(g), GEOS_GEOMETRYCOLLECTION);
GEOSGeom_destroy(g);
for(auto& input : geoms) {
GEOSGeom_destroy(input);
}
}
template<>
template<>
void object::test<5>
()
{
constexpr int size = 2;
GEOSGeometry* geoms[size];
geoms[0] = GEOSGeomFromWKT("LINESTRING (0 0, 1 0, 1 1, 0 1, 0 0)");
geoms[1] = GEOSGeomFromWKT("LINESTRING (1 1, 2 1, 2 2, 1 2, 1 1)");
GEOSGeometry* g = GEOSPolygonize_valid(geoms, size);
ensure(nullptr != g);
ensure_equals(GEOSGetNumGeometries(g), 2);
ensure_equals(GEOSGeomTypeId(g), GEOS_MULTIPOLYGON);
GEOSGeom_destroy(g);
for(auto& input : geoms) {
GEOSGeom_destroy(input);
}
}
// Test GEOSPolygonize_full
template<>
template<>
void object::test<6>
()
{
geom1_ = GEOSGeomFromWKT("MULTILINESTRING ((0 0, 1 0, 1 1, 0 1, 0 0), (0 0, 0.5 0.5), (1 1, 2 2, 1 2, 2 1, 1 1))");
GEOSGeometry* cuts;
GEOSGeometry* dangles;
GEOSGeometry* invalidRings;
result_ = GEOSPolygonize_full(geom1_, &cuts, &dangles, &invalidRings);
expected_ = GEOSGeomFromWKT("GEOMETRYCOLLECTION(POLYGON ((0 0, 1 0, 1 1, 0 1, 0 0)))");
GEOSGeometry* expected_cuts = GEOSGeomFromWKT("GEOMETRYCOLLECTION EMPTY");
GEOSGeometry* expected_dangles = GEOSGeomFromWKT("GEOMETRYCOLLECTION(LINESTRING (0 0, 0.5 0.5))");
GEOSGeometry* expected_invalidRings = GEOSGeomFromWKT("GEOMETRYCOLLECTION(LINESTRING (1 1, 2 2, 1 2, 2 1, 1 1))");
ensure_geometry_equals(result_, expected_);
ensure_geometry_equals(cuts, expected_cuts);
ensure_geometry_equals(dangles, expected_dangles);
ensure_geometry_equals(invalidRings, expected_invalidRings);
GEOSGeom_destroy(cuts);
GEOSGeom_destroy(dangles);
GEOSGeom_destroy(invalidRings);
GEOSGeom_destroy(expected_cuts);
GEOSGeom_destroy(expected_dangles);
GEOSGeom_destroy(expected_invalidRings);
}
template<>
template<>
void object::test<7>
()
{
constexpr int size = 2;
GEOSGeometry* geoms[size];
geoms[0] = GEOSGeomFromWKT("LINESTRING (0 0, 2 0)");
geoms[1] = GEOSGeomFromWKT("CIRCULARSTRING (0 0, 1 1, 2 0)");
for (auto& geom : geoms) {
ensure(geom != nullptr);
}
GEOSGeometry* g = GEOSPolygonize(geoms, size);
ensure("curved geometries not supported", g == nullptr);
for(auto& input : geoms) {
GEOSGeom_destroy(input);
}
}
} // namespace tut
|
