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| 252 | #else |
252 | #else |
| 253 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
253 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
| 254 | #endif |
254 | #endif |
| 255 | } |
255 | } |
| 256 | |
256 | |
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257 | // can be substantially faster than floor, if your value range allows for it |
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258 | template<typename T> |
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259 | inline T |
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260 | fastfloor (T x) |
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261 | { |
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262 | return std::floor (x); |
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263 | } |
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264 | |
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265 | inline float |
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266 | fastfloor (float x) |
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267 | { |
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268 | return sint32(x) - (x < 0); |
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269 | } |
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270 | |
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271 | inline double |
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272 | fastfloor (double x) |
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273 | { |
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274 | return sint64(x) - (x < 0); |
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275 | } |
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276 | |
| 257 | /* |
277 | /* |
| 258 | * absdir(int): Returns a number between 1 and 8, which represent |
278 | * absdir(int): Returns a number between 1 and 8, which represent |
| 259 | * the "absolute" direction of a number (it actually takes care of |
279 | * the "absolute" direction of a number (it actually takes care of |
| 260 | * "overflow" in previous calculations of a direction). |
280 | * "overflow" in previous calculations of a direction). |
| 261 | */ |
281 | */ |
