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#include <stdio.h>
#include "pic.h"
#include "y.tab.h"
obj *movegen(void)
{
static double prevdx, prevdy;
int i, some;
double defx, defy, dx, dy;
obj *p;
obj *ppos;
static int xtab[] = { 1, 0, -1, 0 }; /* R=0, U=1, L=2, D=3 */
static int ytab[] = { 0, 1, 0, -1 };
Attr *ap;
defx = getfval("movewid");
defy = getfval("moveht");
dx = dy = some = 0;
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 SAME:
dx = prevdx;
dy = prevdy;
some++;
break;
case LEFT:
dx -= (ap->a_sub==DEFAULT) ? defx : ap->a_val.f;
some++;
hvmode = L_DIR;
break;
case RIGHT:
dx += (ap->a_sub==DEFAULT) ? defx : ap->a_val.f;
some++;
hvmode = R_DIR;
break;
case UP:
dy += (ap->a_sub==DEFAULT) ? defy : ap->a_val.f;
some++;
hvmode = U_DIR;
break;
case DOWN:
dy -= (ap->a_sub==DEFAULT) ? defy : ap->a_val.f;
some++;
hvmode = D_DIR;
break;
case TO:
ppos = ap->a_val.o;
dx = ppos->o_x - curx;
dy = ppos->o_y - cury;
some++;
break;
case BY:
ppos = ap->a_val.o;
dx = ppos->o_x;
dy = ppos->o_y;
some++;
break;
case FROM:
case AT:
ppos = ap->a_val.o;
curx = ppos->o_x;
cury = ppos->o_y;
break;
}
}
if (some) {
defx = dx;
defy = dy;
} else {
defx *= xtab[hvmode];
defy *= ytab[hvmode];
}
prevdx = defx;
prevdy = defy;
extreme(curx, cury);
curx += defx;
cury += defy;
extreme(curx, cury);
p = makenode(MOVE, 0);
dprintf("M %g %g\n", curx, cury);
return(p);
}
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