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", |