ViewVC Help
View File | Revision Log | Show Annotations | Download File | Root Listing
root/Development/ray/src/gen/gensurf.c
(Generate patch)

Comparing ray/src/gen/gensurf.c (file contents):
Revision 2.30 by greg, Tue Dec 10 17:22:39 2024 UTC vs.
Revision 2.31 by greg, Tue Jan 21 01:56:27 2025 UTC

# Line 40 | Line 40 | char  texname[] = "Phong";
40  
41   int  smooth = 0;                /* apply smoothing? */
42   int  objout = 0;                /* output .OBJ format? */
43 + int  rev = 0;                   /* invert normal directions? */
44  
45   char  *modname, *surfname;
46  
# Line 109 | Line 110 | main(int argc, char *argv[])
110                          smooth++;
111                  else if (!strcmp(argv[i], "-o"))
112                          objout++;
113 +                else if (!strcmp(argv[i], "-i"))
114 +                        rev = 1;
115                  else
116                          goto userror;
117  
# Line 356 | Line 359 | putsquare(             /* put out a square */
359          int  axis;
360          FVECT  v1, v2, vc1, vc2;
361          int  ok1, ok2;
362 +
363 +        if (rev) {                      /* reverse normals? */
364 +                POINT  *pt = p1; p1 = p2; p2 = pt;
365 +        }
366                                          /* compute exact normals */
367          ok1 = (p0->valid && p1->valid && p2->valid);
368          if (ok1) {
# Line 536 | Line 543 | compnorms(             /* compute row of averaged normals */
543                          fvsum(v2, r1[0].p, r1[-1].p, -1.0);
544                  else
545                          fvsum(v2, r1[1].p, r1[-1].p, -1.0);
546 <                fcross(r1[0].n, v1, v2);
546 >                if (rev)
547 >                        fcross(r1[0].n, v2, v1);
548 >                else
549 >                        fcross(r1[0].n, v1, v2);
550                  normalize(r1[0].n);
551          skip:
552                  r0++; r1++; r2++;

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines