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Comparing ray/src/common/face.c (file contents):
Revision 2.11 by schorsch, Thu Jun 26 00:58:09 2003 UTC vs.
Revision 2.14 by greg, Sun Jun 14 02:10:44 2020 UTC

# Line 32 | Line 32 | static const char RCSid[] = "$Id$";
32  
33  
34   FACE *
35 < getface(o)                      /* get arguments for a face */
36 < OBJREC  *o;
35 > getface(                                /* get arguments for a face */
36 >        OBJREC  *o
37 > )
38   {
39          double  d1;
40          int  smalloff, badvert;
41          FVECT  v1, v2, v3;
42 <        register FACE  *f;
43 <        register int  i;
42 >        FACE  *f;
43 >        int  i;
44  
45          if ((f = (FACE *)o->os) != NULL)
46                  return(f);                      /* already done */
# Line 56 | Line 57 | OBJREC  *o;
57          f->va = o->oargs.farg;
58          f->nv = o->oargs.nfargs / 3;
59                                                  /* check for last==first */
60 <        if (dist2(VERTEX(f,0),VERTEX(f,f->nv-1)) <= FTINY*FTINY)
60 >        if (f->nv > 3 && dist2(VERTEX(f,0),VERTEX(f,f->nv-1)) <= FTINY*FTINY)
61                  f->nv--;
62                                                  /* compute area and normal */
63          f->norm[0] = f->norm[1] = f->norm[2] = 0.0;
# Line 106 | Line 107 | OBJREC  *o;
107  
108  
109   void
110 < freeface(o)                     /* free memory associated with face */
111 < OBJREC  *o;
110 > freeface(                       /* free memory associated with face */
111 >        OBJREC  *o
112 > )
113   {
114          if (o->os == NULL)
115                  return;
# Line 117 | Line 119 | OBJREC  *o;
119  
120  
121   int
122 < inface(p, f)                    /* determine if point is in face */
123 < FVECT  p;
124 < FACE  *f;
122 > inface(                         /* determine if point is in face */
123 >        FVECT  p,
124 >        FACE  *f
125 > )
126   {
127          int  ncross, n;
128          double  x, y;
129          int  tst;
130 <        register int  xi, yi;
131 <        register RREAL  *p0, *p1;
130 >        int  xi, yi;
131 >        RREAL  *p0, *p1;
132  
133 <        xi = (f->ax+1)%3;
134 <        yi = (f->ax+2)%3;
133 >        if ((xi = f->ax + 1) >= 3) xi -= 3;
134 >        if ((yi = xi + 1) >= 3) yi -= 3;
135          x = p[xi];
136          y = p[yi];
137          n = f->nv;

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