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root/Development/ray/src/common/dircode.c

Comparing ray/src/common/dircode.c (file contents):
Revision 2.2 by greg, Tue Mar 4 19:02:47 2003 UTC vs.
Revision 2.5 by greg, Fri Jun 20 00:25:49 2003 UTC

#	Line 2 | Line 2
2		static const char RCSid[] = "$Id$";
3		#endif
4		/*
5	<	* Compute 4-byte direction code (assume this fits into int)
5	>	* Compute a 4-byte direction code (int32 type defined in standard.h).
6	>	*
7	>	* Mean accuracy is 0.0022 degrees, with a maximum error of 0.0058 degrees.
8		*/
9
10		#include "standard.h"
#	Line 17 | Line 19 | static const char RCSid[] = "$Id$";
19		#define F2SFT           18
20		#define FMASK           0x1fff
21
22	<	int4
22	>	int32
23		encodedir(dv)           /* encode a normalized direction vector */
24		FVECT   dv;
25		{
26	<	register int4   dc = 0;
26	>	register int32  dc = 0;
27		int     cd[3], cm;
28		register int    i;
29
30		for (i = 0; i < 3; i++)
31		if (dv[i] < 0.) {
32	<	cd[i] = dv[i] * -DCSCALE;
32	>	cd[i] = (int)(dv[i] * -DCSCALE);
33		dc |= FXNEG<<i;
34		} else
35	<	cd[i] = dv[i] * DCSCALE;
35	>	cd[i] = (int)(dv[i] * DCSCALE);
36		if (cd[0] <= cd[1]) {
37		dc |= F1X | cd[0] << F1SFT;
38		cm = cd[1];
#	Line 51 | Line 53 | FVECT  dv;
53		void
54		decodedir(dv, dc)       /* decode a normalized direction vector */
55		register FVECT  dv;     /* returned */
56	<	register int4   dc;
56	>	register int32  dc;
57		{
58		double  d1, d2, der;
59
#	Line 75 | Line 77 | register int4  dc;
77
78		double
79		dir2diff(dc1, dc2)              /* approx. radians^2 between directions */
80	<	int4    dc1, dc2;
80	>	int32   dc1, dc2;
81		{
82		FVECT   v1, v2;
83
#	Line 88 | Line 90 | int4   dc1, dc2;
90
91		double
92		fdir2diff(dc1, v2)              /* approx. radians^2 between directions */
93	<	int4    dc1;
93	>	int32   dc1;
94		register FVECT  v2;
95		{
96		FVECT   v1;

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