Mercurial > projects > chipmunkd
comparison trunk/chipmunkd/cpSpaceHash.d @ 17:131331ebb599
cpVect toString method and some cleanup
| author | Extrawurst |
|---|---|
| date | Thu, 09 Dec 2010 01:51:30 +0100 |
| parents | df4ebc8add66 |
| children |
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| 16:af2f61a96318 | 17:131331ebb599 |
|---|---|
| 283 | 283 |
| 284 // The hash function itself. | 284 // The hash function itself. |
| 285 static cpHashValue | 285 static cpHashValue |
| 286 hash_func(cpHashValue x, cpHashValue y, cpHashValue n) | 286 hash_func(cpHashValue x, cpHashValue y, cpHashValue n) |
| 287 { | 287 { |
| 288 return cast(cpHashValue)((x*1640531513uL ^ y*2654435789uL) % n); | 288 return cast(cpHashValue)(( (x*1640531513uL) ^ (y*2654435789uL) ) % n); |
| 289 } | 289 } |
| 290 | 290 |
| 291 // Much faster than (int)floor(f) | 291 // Much faster than (int)floor(f) |
| 292 // Profiling showed floor() to be a sizable performance hog | 292 // Profiling showed floor() to be a sizable performance hog |
| 293 static int | 293 static int |