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
|
#include "catch.hpp"
#include <mapnik/grid_vertex_converter.hpp>
TEST_CASE("spiral_iterator") {
SECTION("sprial 3x3") {
mapnik::geometry::spiral_iterator si(3);
const mapnik::geometry::point<int> points[] = {
{ 0, 0 }, { 1, 0 }, { 1, -1 },
{ 0, -1 }, { -1, -1 }, { -1, 0 },
{ -1, 1 }, { 0, 1 }, { 1, 1 } };
const std::size_t points_size = std::extent<decltype(points)>::value;
int x, y;
std::size_t index = 0;
while (si.vertex(&x, &y))
{
REQUIRE(index < points_size);
CHECK(x == points[index].x);
CHECK(y == points[index].y);
index++;
}
CHECK(index == points_size);
}
}
TEST_CASE("grid_vertex_converter") {
SECTION("empty polygon") {
mapnik::geometry::polygon<double> poly;
using path_type = mapnik::geometry::polygon_vertex_adapter<double>;
path_type path(poly);
using converter_type = mapnik::geometry::grid_vertex_converter<path_type, double>;
converter_type gvc(path, 10.0, 10.0, 1.0);
double x, y;
unsigned cmd = gvc.vertex(&x, &y);
CHECK(cmd == mapnik::SEG_END);
}
SECTION("grid of a square") {
mapnik::geometry::polygon<double> poly;
auto & exterior_ring = poly.exterior_ring;
exterior_ring.emplace_back(-10, -10);
exterior_ring.emplace_back( 10, -10);
exterior_ring.emplace_back( 10, 10);
exterior_ring.emplace_back(-10, 10);
exterior_ring.emplace_back(-10, -10);
using path_type = mapnik::geometry::polygon_vertex_adapter<double>;
path_type path(poly);
using converter_type = mapnik::geometry::grid_vertex_converter<path_type, double>;
converter_type gvc(path, 3.0, 3.0, 1.0);
const mapnik::geometry::point<double> points[] = {
{ 0, 0 }, { 3, 0 }, { 3, 3 }, { 0, 3 },
{ -3, 3 }, { -3, 0 }, { -3, -3 }, { 0, -3 },
{ 3, -3 }, { 6, -3 }, { 6, 0 }, { 6, 3 },
{ 6, 6 }, { 3, 6 }, { 0, 6 }, { -3, 6 },
{ -6, 6 }, { -6, 3 }, { -6, 0 }, { -6, -3 },
{ -6, -6 }, { -3, -6 }, { 0, -6 }, { 3, -6 },
{ 6, -6 }, { 9, -6 }, { 9, -3 }, { 9, 0 },
{ 9, 3 }, { 9, 6 }, { 9, 9 }, { 6, 9 },
{ 3, 9 }, { 0, 9 }, { -3, 9 }, { -6, 9 },
{ -9, 9 }, { -9, 6 }, { -9, 3 }, { -9, 0 },
{ -9, -3 }, { -9, -6 }, { -9, -9 }, { -6, -9 },
{ -3, -9 }, { 0, -9 }, { 3, -9 }, { 6, -9 },
{ 9, -9 } };
const std::size_t points_size = std::extent<decltype(points)>::value;
double x, y;
unsigned cmd = mapnik::SEG_END;
std::size_t index = 0;
while ((cmd = gvc.vertex(&x, &y)) != mapnik::SEG_END)
{
REQUIRE(index < points_size);
CHECK(cmd == mapnik::SEG_MOVETO);
CHECK(x == Approx(points[index].x));
CHECK(y == Approx(points[index].y));
index++;
}
CHECK(index == points_size);
CHECK(cmd == mapnik::SEG_END);
}
}
|
