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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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< |
* Compute a 4-byte direction code (int4 type defined in standard.h). |
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> |
* Compute a 4-byte direction code (int32 type defined in standard.h). |
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* |
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* Mean accuracy is 0.0022 degrees, with a maximum error of 0.0058 degrees. |
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*/ |
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#define F2SFT 18 |
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#define FMASK 0x1fff |
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|
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< |
int4 |
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> |
int32 |
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encodedir(dv) /* encode a normalized direction vector */ |
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FVECT dv; |
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{ |
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< |
register int4 dc = 0; |
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> |
register int32 dc = 0; |
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int cd[3], cm; |
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register int i; |
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|
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for (i = 0; i < 3; i++) |
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if (dv[i] < 0.) { |
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< |
cd[i] = dv[i] * -DCSCALE; |
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> |
cd[i] = (int)(dv[i] * -DCSCALE); |
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dc |= FXNEG<<i; |
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} else |
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< |
cd[i] = dv[i] * DCSCALE; |
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> |
cd[i] = (int)(dv[i] * DCSCALE); |
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if (cd[0] <= cd[1]) { |
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dc |= F1X | cd[0] << F1SFT; |
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cm = cd[1]; |
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void |
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decodedir(dv, dc) /* decode a normalized direction vector */ |
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register FVECT dv; /* returned */ |
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< |
register int4 dc; |
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> |
register int32 dc; |
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{ |
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double d1, d2, der; |
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|
| 77 |
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|
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double |
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dir2diff(dc1, dc2) /* approx. radians^2 between directions */ |
| 80 |
< |
int4 dc1, dc2; |
| 80 |
> |
int32 dc1, dc2; |
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{ |
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FVECT v1, v2; |
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|
| 90 |
|
|
| 91 |
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double |
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fdir2diff(dc1, v2) /* approx. radians^2 between directions */ |
| 93 |
< |
int4 dc1; |
| 93 |
> |
int32 dc1; |
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register FVECT v2; |
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{ |
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FVECT v1; |
