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
|
/* libgrbs - geometric rubber band sketch model
Copyright (C) 2021 Tibor 'Igor2' Palinkas
(Supported by NLnet NGI0 PET Fund in 2021)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Contact:
Project page: http://repo.hu/projects/libgrbs
lead developer: http://repo.hu/projects/pcb-rnd/contact.html
*/
static void extend_sentinel(grbs_arc_t *sentinel, double end)
{
if (grbs_angle_in_arc(sentinel->sa, sentinel->da, end, 0))
return;
/* need to extend sentinel range to include the newly attached angle */
if (sentinel->new_adir > 0) {
if (sentinel->sa > end)
end += 2 * GRBS_PI;
sentinel->da = end - sentinel->sa;
}
else {
if (sentinel->sa < end)
end -= 2 * GRBS_PI;
sentinel->da = end - sentinel->sa;
}
}
static int grbs_force_attach_line_to_pt(grbs_t *grbs, grbs_line_t *line, grbs_point_t *pt, double outer_copr, double clr, int segi)
{
grbs_arc_t *new, *prev = line->a1, *next = line->a2, *sentinel = NULL, *under;
grbs_2net_t *tn = grbs_arc_parent_2net(prev);
g2d_offs_t o;
g2d_vect_t vpt, vcr;
g2d_cline_t cline;
double dx, dy, sa, r, da;
if (line->immutable)
return -1;
/* cheap: insert a zero-length arc keeping the path with two colinear lines;
then realize() will bump it as needed */
vpt.x = pt->x; vpt.y = pt->y;
cline.p1.x = line->x1; cline.p1.y = line->y1;
cline.p2.x = line->x2; cline.p2.y = line->y2;
o = g2d_project_pt_cline(vpt, &cline);
if ((o < 0.0) || (o > 1.0))
return -1;
vcr = g2d_cline_offs(&cline, o);
dx = vcr.x - vpt.x;
dy = vcr.y - vpt.y;
sa = atan2(dy, dx);
if (sa < 0)
sa += GRBS_PI*2;
if (segi < 0) {
int found = 0;
for(segi = 0; segi < GRBS_MAX_SEG; segi++) {
sentinel = gdl_first(&pt->arcs[segi]);
if (sentinel == NULL) continue;
if (grbs_angle_in_arc(sentinel->new_in_use ? sentinel->new_sa : sentinel->sa, sentinel->new_in_use ? sentinel->new_da : sentinel->da, sa, 0)) {
found = 1;
break;
}
}
if (!found)
return -1;
}
if (g2d_side_cline_pt(&cline, vpt) < 0)
da = 0.0000001;
else
da = -0.0000001;
r = sqrt(dx*dx + dy*dy);
new = grbs_arc_new(grbs, pt, segi, r, sa, da);
new->parent_pt = pt;
new->in_use = 1;
new->wrong_r = 1;
new->min_r = r;
new->copper = tn->copper;
new->clearance = tn->clearance;
/* if we are attaching to the bottom existing orbit, we may need to extend the sentinel to include us */
if ((sentinel != NULL) && (new->link_point.prev == sentinel)) {
if (sentinel->new_in_use) {
extend_sentinel(sentinel, sa);
extend_sentinel(sentinel, sa+da);
}
else {
/* there was no ->new around this point, the sentinel is only us */
sentinel->sa = sa;
sentinel->da = da;
}
}
grbs_line_del(grbs, line);
gdl_insert_after(&tn->arcs, prev, new, link_2net);
grbs_line_create(grbs, new);
grbs_line_create(grbs, next);
under = new->link_point.prev;
assert(under != NULL);
if (under->new_in_use)
bump_seg_radii(grbs, new, 0, under->new_r + tn->copper, tn->clearance, 0, 0, 0);
/* do not update original ->r - realize_() will bump radii as needed */
if (grbs->auto_created_arc != NULL)
grbs->auto_created_arc(grbs, tn, new);
return 0;
}
int grbs_force_detach(grbs_t *grbs, grbs_arc_t *arc, int draw_line)
{
grbs_arc_t *prev = arc->link_2net.prev, *next = arc->link_2net.next;
int segi = arc->segi;
grbs_point_t *pt = arc->parent_pt;
if ((prev == NULL) || (next == NULL))
return -1;
if (arc->new_in_use || (arc->link_point.prev == NULL)) {
grbs_2net_t *tn = grbs_arc_parent_2net(arc);
grbs_line_del(grbs, arc->sline);
grbs_line_del(grbs, arc->eline);
gdl_remove(&tn->arcs, arc, link_2net);
arc->in_use = 0; /* do not remove sentinel or something that's being routed above */
}
else
grbs_del_arc(grbs, arc);
grbs_clean_unused_sentinel_seg(grbs, pt, segi, 1);
if (draw_line)
grbs_line_create(grbs, next);
return 0;
}
|
