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Comparing ray/src/common/image.c (file contents):
Revision 2.49 by greg, Tue Aug 7 23:17:06 2018 UTC vs.
Revision 2.51 by greg, Thu May 14 20:49:57 2020 UTC

# Line 272 | Line 272 | FVECT  p
272                  d = DOT(disp,v->hvec);
273                  d2 = DOT(disp,v->vdir);
274                  ip[0] = 180.0/PI * atan2(d,d2) / v->horiz + 0.5 - v->hoff;
275 <                d = d*d + d2*d2;
276 <                if (d <= FTINY*FTINY)
275 >                d2 = d*d + d2*d2;
276 >                if (d2 <= FTINY*FTINY)
277                          return(VL_BAD); /* at pole */
278 <                if ((v->vaft > FTINY) & (d >= v->vaft*v->vaft))
278 >                if ((v->vaft > FTINY) & (d2 >= v->vaft*v->vaft))
279                          rflags |= VL_BEYOND;
280 <                d = 1.0/sqrt(d);
280 >                d = 1.0/sqrt(d2);
281                  ip[1] = DOT(disp,v->vvec)*d/v->vn2 + 0.5 - v->voff;
282                  ip[2] = VLEN(disp);
283                  ip[2] *= (1.0 - v->vfore*d);
# Line 630 | Line 630 | RESOLU  *rp
630          if (rp != NULL && !fgetsresolu(rp, fp))
631                  mvs.ok = 0;
632  
633 <        fclose(fp);
633 >        if (fp != stdin)
634 >                fclose(fp);
635  
636          return(mvs.ok);
637   }

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