| 1 | /* |
1 | /* |
| 2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
| 3 | * |
3 | * |
| 4 | * Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010,2011 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
| 5 | * |
5 | * |
| 6 | * Deliantra is free software: you can redistribute it and/or modify it under |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
| 7 | * the terms of the Affero GNU General Public License as published by the |
7 | * the terms of the Affero GNU General Public License as published by the |
| 8 | * Free Software Foundation, either version 3 of the License, or (at your |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
| 9 | * option) any later version. |
9 | * option) any later version. |
| … | |
… | |
| 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 | */ |
