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Comparing ray/src/common/mat4.c (file contents):
Revision 1.2 by greg, Tue Oct 24 14:01:17 1989 UTC vs.
Revision 1.4 by greg, Thu Jan 18 23:58:56 1990 UTC

# Line 13 | Line 13 | static char SCCSid[] = "$SunId$ LBL";
13  
14   static double  m4tmp[4][4];             /* for efficiency */
15  
16 + #ifdef  BSD
17   #define  copymat4(m4a,m4b)      bcopy((char *)m4b,(char *)m4a,sizeof(m4tmp))
18 + #else
19 + #define  copymat4(m4a,m4b)      (void)memcpy((char *)m4a,(char *)m4b,sizeof(m4tmp))
20 + extern char  *memcpy();
21 + #endif
22  
23  
24   setident4(m4)
# Line 51 | Line 56 | double  v3a[3];
56   register double  v3b[3];
57   register double  m4[4][4];
58   {
59 <        register int  i;
60 <        
61 <        for (i = 0; i < 3; i++)
57 <                m4tmp[0][i] = v3b[0]*m4[0][i] +
58 <                              v3b[1]*m4[1][i] +
59 <                              v3b[2]*m4[2][i];
59 >        m4tmp[0][0] = v3b[0]*m4[0][0] + v3b[1]*m4[1][0] + v3b[2]*m4[2][0];
60 >        m4tmp[0][1] = v3b[0]*m4[0][1] + v3b[1]*m4[1][1] + v3b[2]*m4[2][1];
61 >        m4tmp[0][2] = v3b[0]*m4[0][2] + v3b[1]*m4[1][2] + v3b[2]*m4[2][2];
62          
63          v3a[0] = m4tmp[0][0];
64          v3a[1] = m4tmp[0][1];

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