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tpic

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rsc 2006-04-14 00:04:03 +00:00
parent 434d1b41b6
commit b6d98463b4
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127
src/cmd/tpic/circgen.c Normal file
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#include <stdio.h>
#include "pic.h"
#include "y.tab.h"
obj*
circgen(int type)
{
static double rad[2] = { HT2, WID2 };
static double rad2[2] = { HT2, HT2 };
int i, at, t, with, battr;
double xwith, ywith;
double r, r2, ddval, fillval;
obj *p, *ppos;
Attr *ap;
battr = at = 0;
with = xwith = ywith = fillval = 0;
t = (type == CIRCLE) ? 0 : 1;
r = 0;
r2 = 0;
ddval = 0;
if (type == CIRCLE)
r = r2 = getfval("circlerad");
else if (type == ELLIPSE) {
r = getfval("ellipsewid") / 2;
r2 = getfval("ellipseht") / 2;
}
for (i = 0; i < nattr; i++) {
ap = &attr[i];
switch (ap->a_type) {
case TEXTATTR:
savetext(ap->a_sub, ap->a_val.p);
break;
case RADIUS:
r = ap->a_val.f;
break;
case DIAMETER:
case WIDTH:
r = ap->a_val.f / 2;
break;
case HEIGHT:
r2 = ap->a_val.f / 2;
break;
case SAME:
r = rad[t];
r2 = rad2[t];
break;
case WITH:
with = ap->a_val.i;
break;
case AT:
ppos = ap->a_val.o;
curx = ppos->o_x;
cury = ppos->o_y;
at++;
break;
case INVIS:
battr |= INVIS;
break;
case DOT:
case DASH:
battr |= ap->a_type==DOT ? DOTBIT : DASHBIT;
if (ap->a_sub == DEFAULT)
ddval = getfval("dashwid");
else
ddval = ap->a_val.f;
break;
case FILL:
battr |= FILLBIT;
if (ap->a_sub == DEFAULT)
fillval = getfval("fillval");
else
fillval = ap->a_val.f;
break;
}
}
if (type == CIRCLE)
r2 = r; /* probably superfluous */
if (with) {
switch (with) {
case NORTH: ywith = -r2; break;
case SOUTH: ywith = r2; break;
case EAST: xwith = -r; break;
case WEST: xwith = r; break;
case NE: xwith = -r * 0.707; ywith = -r2 * 0.707; break;
case SE: xwith = -r * 0.707; ywith = r2 * 0.707; break;
case NW: xwith = r * 0.707; ywith = -r2 * 0.707; break;
case SW: xwith = r * 0.707; ywith = r2 * 0.707; break;
}
curx += xwith;
cury += ywith;
}
if (!at) {
if (isright(hvmode))
curx += r;
else if (isleft(hvmode))
curx -= r;
else if (isup(hvmode))
cury += r2;
else
cury -= r2;
}
p = makenode(type, 2);
p->o_val[0] = rad[t] = r;
p->o_val[1] = rad2[t] = r2;
if (r <= 0 || r2 <= 0) {
ERROR "%s has invalid radius %g\n", (type==CIRCLE) ? "circle" : "ellipse", r<r2 ? r : r2 WARNING;
}
p->o_attr = battr;
p->o_ddval = ddval;
p->o_fillval = fillval;
extreme(curx+r, cury+r2);
extreme(curx-r, cury-r2);
if (type == CIRCLE)
dprintf("C %g %g %g\n", curx, cury, r);
if (type == ELLIPSE)
dprintf("E %g %g %g %g\n", curx, cury, r, r2);
if (isright(hvmode))
curx += r;
else if (isleft(hvmode))
curx -= r;
else if (isup(hvmode))
cury += r2;
else
cury -= r2;
return(p);
}