tcircgen.c - plan9port - [fork] Plan 9 from user space
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tcircgen.c (2713B)
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1 #include <stdio.h>
2 #include "pic.h"
3 #include "y.tab.h"
4
5 obj *circgen(int type)
6 {
7 static double rad[2] = { HT2, WID2 };
8 static double rad2[2] = { HT2, HT2 };
9 int i, at, t, with, battr;
10 double xwith, ywith;
11 double r, r2, ddval, fillval;
12 obj *p, *ppos;
13 Attr *ap;
14
15 r = r2 = 0.0; /* Botch? (gcc) */
16
17 battr = at = 0;
18 with = xwith = ywith = fillval = ddval = 0;
19 t = (type == CIRCLE) ? 0 : 1;
20 if (type == CIRCLE)
21 r = r2 = getfval("circlerad");
22 else if (type == ELLIPSE) {
23 r = getfval("ellipsewid") / 2;
24 r2 = getfval("ellipseht") / 2;
25 }
26 for (i = 0; i < nattr; i++) {
27 ap = &attr[i];
28 switch (ap->a_type) {
29 case TEXTATTR:
30 savetext(ap->a_sub, ap->a_val.p);
31 break;
32 case RADIUS:
33 r = ap->a_val.f;
34 break;
35 case DIAMETER:
36 case WIDTH:
37 r = ap->a_val.f / 2;
38 break;
39 case HEIGHT:
40 r2 = ap->a_val.f / 2;
41 break;
42 case SAME:
43 r = rad[t];
44 r2 = rad2[t];
45 break;
46 case WITH:
47 with = ap->a_val.i;
48 break;
49 case AT:
50 ppos = ap->a_val.o;
51 curx = ppos->o_x;
52 cury = ppos->o_y;
53 at++;
54 break;
55 case INVIS:
56 battr |= INVIS;
57 break;
58 case NOEDGE:
59 battr |= NOEDGEBIT;
60 break;
61 case DOT:
62 case DASH:
63 battr |= ap->a_type==DOT ? DOTBIT : DASHBIT;
64 if (ap->a_sub == DEFAULT)
65 ddval = getfval("dashwid");
66 else
67 ddval = ap->a_val.f;
68 break;
69 case FILL:
70 battr |= FILLBIT;
71 if (ap->a_sub == DEFAULT)
72 fillval = getfval("fillval");
73 else
74 fillval = ap->a_val.f;
75 break;
76 }
77 }
78 if (type == CIRCLE)
79 r2 = r; /* probably superfluous */
80 if (with) {
81 switch (with) {
82 case NORTH: ywith = -r2; break;
83 case SOUTH: ywith = r2; break;
84 case EAST: xwith = -r; break;
85 case WEST: xwith = r; break;
86 case NE: xwith = -r * 0.707; ywith = -r2 * 0.707; break;
87 case SE: xwith = -r * 0.707; ywith = r2 * 0.707; break;
88 case NW: xwith = r * 0.707; ywith = -r2 * 0.707; break;
89 case SW: xwith = r * 0.707; ywith = r2 * 0.707; break;
90 }
91 curx += xwith;
92 cury += ywith;
93 }
94 if (!at) {
95 if (isright(hvmode))
96 curx += r;
97 else if (isleft(hvmode))
98 curx -= r;
99 else if (isup(hvmode))
100 cury += r2;
101 else
102 cury -= r2;
103 }
104 p = makenode(type, 2);
105 p->o_val[0] = rad[t] = r;
106 p->o_val[1] = rad2[t] = r2;
107 if (r <= 0 || r2 <= 0) {
108 ERROR "%s has invalid radius %g\n", (type==CIRCLE) ? "circle" : "ellipse", r<r2 ? r : r2 WARNING;
109 }
110 p->o_attr = battr;
111 p->o_ddval = ddval;
112 p->o_fillval = fillval;
113 extreme(curx+r, cury+r2);
114 extreme(curx-r, cury-r2);
115 if (type == CIRCLE)
116 dprintf("C %g %g %g\n", curx, cury, r);
117 if (type == ELLIPSE)
118 dprintf("E %g %g %g %g\n", curx, cury, r, r2);
119 if (isright(hvmode))
120 curx += r;
121 else if (isleft(hvmode))
122 curx -= r;
123 else if (isup(hvmode))
124 cury += r2;
125 else
126 cury -= r2;
127 return(p);
128 }