| 819 |
|
) |
| 820 |
|
{ |
| 821 |
|
int startx = ebut->x, starty = ebut->y; |
| 822 |
< |
int endx, endy; |
| 823 |
< |
|
| 822 |
> |
int endx, endy, midx, midy; |
| 823 |
> |
FVECT odir, v1; |
| 824 |
> |
double d, d1; |
| 825 |
> |
/* get mouse drag */ |
| 826 |
|
XMaskEvent(ourdisplay, ButtonReleaseMask, levptr(XEvent)); |
| 827 |
|
endx = levptr(XButtonReleasedEvent)->x; |
| 828 |
|
endy = levptr(XButtonReleasedEvent)->y; |
| 829 |
< |
if ((endx == startx) | (endy == starty)) { |
| 830 |
< |
XBell(ourdisplay, 0); |
| 829 |
> |
midx = (startx + endx) >> 1; |
| 830 |
> |
midy = (starty + endy) >> 1; |
| 831 |
> |
/* set focus distance */ |
| 832 |
> |
if (viewray(v1, odir, &odev.v, |
| 833 |
> |
(midx+.5)/odev.hres, (midy+.5)/odev.vres) < -FTINY) |
| 834 |
|
return; |
| 835 |
< |
} |
| 835 |
> |
d = getdistance(midx, midy, odir); /* distance from front plane */ |
| 836 |
> |
#ifdef DOBJ |
| 837 |
> |
d1 = dobj_trace(NULL, v1, odir); |
| 838 |
> |
if (d1 < d) |
| 839 |
> |
d = d1; |
| 840 |
> |
#endif |
| 841 |
> |
if (d < .99*FHUGE) |
| 842 |
> |
odev.v.vdist = d + sqrt(dist2(v1, odev.v.vp)); |
| 843 |
> |
/* set frame for rendering */ |
| 844 |
> |
if ((endx == startx) | (endy == starty)) |
| 845 |
> |
return; |
| 846 |
|
if (endx < startx) {register int c = endx; endx = startx; startx = c;} |
| 847 |
|
if (endy < starty) {register int c = endy; endy = starty; starty = c;} |
| 848 |
|
sprintf(odev_args, "%.3f %.3f %.3f %.3f", |
