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
|
#include <2geom/sweep-bounds.h>
#include <toys/path-cairo.h>
#include <toys/toy-framework-2.h>
using namespace Geom;
class Sweep: public Toy {
public:
PointSetHandle hand;
unsigned count_a, count_b;
void draw(cairo_t *cr, std::ostringstream *notify, int width, int height, bool save, std::ostringstream *timer_stream) override {
std::vector<Rect> rects_a, rects_b;
cairo_set_source_rgb(cr, 0,0,0);
for(unsigned i = 0; i < count_a; i++)
rects_a.emplace_back(hand.pts[i*2], hand.pts[i*2+1]);
for(unsigned i = 0; i < count_b; i++)
rects_b.emplace_back(hand.pts[i*2 + count_a*2], hand.pts[i*2+1 + count_a*2]);
{
std::vector<std::vector<unsigned> > res = sweep_bounds(rects_a);
cairo_set_line_width(cr,0.5);
cairo_save(cr);
cairo_set_source_rgb(cr, 1, 0, 0);
for(unsigned i = 0; i < res.size(); i++) {
for(unsigned j = 0; j < res[i].size(); j++) {
draw_line_seg(cr, rects_a[i].midpoint(), rects_a[res[i][j]].midpoint());
cairo_stroke(cr);
}
}
cairo_restore(cr);
}{
std::vector<std::vector<unsigned> > res = sweep_bounds(rects_a, rects_b);
cairo_set_line_width(cr,0.5);
cairo_save(cr);
cairo_set_source_rgb(cr, 0.5, 0, 0.5);
for(unsigned i = 0; i < res.size(); i++) {
for(unsigned j = 0; j < res[i].size(); j++) {
draw_line_seg(cr, rects_a[i].midpoint(), rects_b[res[i][j]].midpoint());
cairo_stroke(cr);
}
}
cairo_restore(cr);
}
cairo_set_line_width(cr,3);
cairo_set_source_rgba(cr,1,0,0,1);
for(unsigned i = 0; i < count_a; i++)
cairo_rectangle(cr, rects_a[i].left(), rects_a[i].top(), rects_a[i].width(), rects_a[i].height());
cairo_stroke(cr);
cairo_set_source_rgba(cr,0,0,1,1);
for(unsigned i = 0; i < count_b; i++)
cairo_rectangle(cr, rects_b[i].left(), rects_b[i].top(), rects_b[i].width(), rects_b[i].height());
cairo_stroke(cr);
Toy::draw(cr, notify, width, height, save,timer_stream);
}
bool should_draw_numbers() override { return false; }
public:
Sweep () {
count_a = 20;
count_b = 10;
for(unsigned i = 0; i < (count_a + count_b); i++) {
Point dim(uniform() * 90 + 10, uniform() * 90 + 10),
pos(uniform() * 500 + 50, uniform() * 500 + 50);
hand.pts.push_back(pos - dim/2);
hand.pts.push_back(pos + dim/2);
}
handles.push_back(&hand);
}
};
int main(int argc, char **argv) {
init(argc, argv, new Sweep());
return 0;
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4:fileencoding=utf-8:textwidth=99 :
|
