Difference between revisions of "Random number generator"
(→Misuse: [http://taeb-nethack.blogspot.com/2009/03/predicting-and-controlling-nethacks.html Predicting and controlling NetHack's randomness]) |
(removed the attribute "high quality" and the sentence "ultimately the only way a player can influence the odds is by maintaining a high Luck value." because clearly they are not true anymore) |
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| − | NetHack uses a | + | NetHack uses a '''random number generator''' ('''RNG''') to determine the outcome of in-game events. Probabilities are expressed in [[d notation]], an homage to Dungeons and Dragons. |
==Anthropomorphisation== | ==Anthropomorphisation== | ||
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==Technical details== | ==Technical details== | ||
| − | Although NetHack relies on the C '''rand()''' function, random number generation is not as straightforward as picking a number between 0 and n. [[Rnd.c]] holds all of the game's RNG functions, which can return results that depend on your [[Luck]] or [[experience level]]. [[Source diver]]s might profit from examining these functions | + | Although NetHack relies on the C '''rand()''' function, random number generation is not as straightforward as picking a number between 0 and n. [[Rnd.c]] holds all of the game's RNG functions, which can return results that depend on your [[Luck]] or [[experience level]]. [[Source diver]]s might profit from examining these functions. |
==Misuse== | ==Misuse== | ||
Revision as of 13:48, 3 March 2009
NetHack uses a random number generator (RNG) to determine the outcome of in-game events. Probabilities are expressed in d notation, an homage to Dungeons and Dragons.
Anthropomorphisation
The RNG is sometimes referred to as the Random Number God. The RNG plays a pivotal role in determining the fate of all characters, and is sometimes considered the deadliest enemy in the game, despite the fact that expert players such as marvin have demonstrated that nearly every game is ascendable.
Technical details
Although NetHack relies on the C rand() function, random number generation is not as straightforward as picking a number between 0 and n. Rnd.c holds all of the game's RNG functions, which can return results that depend on your Luck or experience level. Source divers might profit from examining these functions.
Misuse
It was found recently by player named Adeon, that sufficiently determined player can find the seed of RNG after starting the game and then use it to his or her advantage - for example to gain unlimited number of wishes from a fountain. For demonstration see his ttyrecs on NAO from 2008-02-28 (starting with http://alt.org/nethack/ttyrecscreen.php?fname=http://alt.org/nethack/userdata/Adeon/ttyrec/2009-02-28.10:31:15.ttyrec). See also Sartak's blog entry Predicting and controlling NetHack's randomness.
