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
|
#include <2geom/piecewise.h>
#include <2geom/sbasis.h>
#include <2geom/bezier-to-sbasis.h>
#include <toys/path-cairo.h>
#include <toys/toy-framework-2.h>
#include <vector>
using namespace Geom;
using namespace std;
void cairo_pw(cairo_t *cr, Piecewise<SBasis> p) {
for(unsigned i = 0; i < p.size(); i++) {
D2<SBasis> B;
B[0] = Linear(p.cuts[i], p.cuts[i+1]);
B[1] = Linear(150) + p[i];
cairo_d2_sb(cr, B);
}
}
void cairo_horiz(cairo_t *cr, double y, vector<double> p) {
for(double i : p) {
cairo_move_to(cr, i, y);
cairo_rel_line_to(cr, 0, 10);
}
}
void cairo_vert(cairo_t *cr, double x, vector<double> p) {
for(double i : p) {
cairo_move_to(cr, x, i);
cairo_rel_line_to(cr, 10, 0);
}
}
#include "pwsbhandle.cpp" // FIXME: This looks like it may give problems later, (including a .cpp file)
class PwToy: public Toy {
unsigned segs, handles_per_curve, curves;
PWSBHandle pwsbh[2];
PointHandle interval_test[2];
void draw(cairo_t *cr, std::ostringstream *notify, int width, int height, bool save, std::ostringstream *timer_stream) override {
cairo_set_source_rgba (cr, 0., 0., 0., 1);
cairo_set_line_width (cr, 1);
std::vector<Piecewise<SBasis> > pws(curves);
for(unsigned a = 0; a < curves; a++) {
pws[a] = pwsbh[a].value();
cairo_pw(cr, pws[a]);
}
cairo_stroke(cr);
Piecewise<SBasis> pw_out = pws[0] + pws[1];
cairo_set_source_rgba (cr, 0., 0., .5, 1.);
cairo_horiz(cr, 500, pw_out.cuts);
cairo_stroke(cr);
cairo_set_source_rgba (cr, 0., 0., .5, 1.);
cairo_pw(cr, pws[0] + pws[1]);
cairo_stroke(cr);
Interval bs = *bounds_local(pw_out, Interval(interval_test[0].pos[0],
interval_test[1].pos[0]));
vector<double> vec;
vec.push_back(bs.min() + 150); vec.push_back(bs.max() + 150);
cairo_set_source_rgba (cr, .5, 0., 0., 1.);
cairo_vert(cr, 100, vec);
cairo_stroke(cr);
/* Portion demonstration
Piecewise<SBasis> pw_out = portion(pws[0], handles[handles.size() - 2][0], handles[handles.size() - 1][0]);
cairo_set_source_rgba (cr, 0, .5, 0, .25);
cairo_set_line_width(cr, 3);
cairo_pw(cr, pw_out);
cairo_stroke(cr);
*/
*notify << pws[0].segN(interval_test[0].pos[0]) << "; " << pws[0].segT(interval_test[0].pos[0]);
Toy::draw(cr, notify, width, height, save,timer_stream);
}
bool should_draw_numbers() override { return false; }
public:
PwToy () {
segs = 3;
handles_per_curve = 4 * segs;
curves = 2;
for(unsigned a = 0; a < curves; a++) {
pwsbh[a] = PWSBHandle(4, 3);
handles.push_back(&pwsbh[a]);
for(unsigned i = 0; i < handles_per_curve; i++)
pwsbh[a].push_back(150 + 300*i/(4*segs), uniform() * 150 + 150 - 50 * a);
}
interval_test[0].pos = Point(150, 400);
interval_test[1].pos = Point(300, 400);
handles.push_back(&interval_test[0]);
handles.push_back(&interval_test[1]);
}
};
int main(int argc, char **argv) {
init(argc, argv, new PwToy());
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 :
|
