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Author Topic: [40d12] Search selects aquifer when told not to  (Read 948 times)

Michael

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[40d12] Search selects aquifer when told not to
« on: July 03, 2009, 01:22:49 am »
(Meta: a similar report was given back in January, but without an example world.  Should I have necromanced?)

ftp://ftp.ocis.net/pub/users/ldeutsch/transient/aquifer.zip

If this world is searched for {6x6, Flux Yes, Aquifer No, River Yes, Magma Pipe Yes), it will choose an area in the "Steppe of Points" in the north of the map.  Both biomes in the selected play area have aquifers, in violation of the criteria.
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Sowelu

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Re: [40d12] Search selects aquifer when told not to
« Reply #1 on: July 03, 2009, 04:05:42 am »
Just checking:  Did it say it matched all criteria, or that it found a partial match?
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Michael

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Re: [40d12] Search selects aquifer when told not to
« Reply #2 on: July 03, 2009, 04:25:58 am »
Quote from: Sowelu on July 03, 2009, 04:05:42 am
Just checking:  Did it say it matched all criteria, or that it found a partial match?

Nope, it's a "Suitable Site".  In fact all criteria turn green at only 28/129 into the search.
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Draco18s

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Re: [40d12] Search selects aquifer when told not to
« Reply #3 on: July 03, 2009, 03:15:16 pm »
There's a slight bug with regards to aquifers and the map.  Moving the selection square 1 tile might get rid of the entire aquifer, as well as shrinking it away from a watersource (such as a river).  The spot shouldn't* have an aquifer on most of the area you're embarking on, but aquifers like to be fuzzy.

*Or should, but don't sometimes.  It's not clear which.  But some square says it doesn't have an aquifer, matches with the search, then the aquifer expands when the embark square is sized.
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Michael

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Re: [40d12] Search selects aquifer when told not to
« Reply #4 on: July 12, 2009, 04:31:12 pm »
I'm just going to resurrect the thread by noting that I'm clearing the example save from my transient folder.  However, the example world can be easily reconstructed using a main seed of 3901070855.

The other two seeds do not appear to be relevant -- I tested a world with both set to 0 and the resulting world showed the bug, although it was a little odd, having advanced to "The Golden Age".  Perhaps Toady's RNG doesn't handle 0 seeds well...
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Draco18s

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Re: [40d12] Search selects aquifer when told not to
« Reply #5 on: July 12, 2009, 07:59:01 pm »
World seed is irrelevant:

Quote from: Draco18s on July 03, 2009, 03:15:16 pm
There's a slight bug with regards to aquifers and the map.  Moving the selection square 1 tile might get rid of the entire aquifer, as well as shrinking it away from a watersource (such as a river).  The spot shouldn't* have an aquifer on most of the area you're embarking on, but aquifers like to be fuzzy.

*Or should, but don't sometimes.  It's not clear which.  But some square says it doesn't have an aquifer, matches with the search, then the aquifer expands when the embark square is sized.
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Michael

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Re: [40d12] Search selects aquifer when told not to
« Reply #6 on: July 13, 2009, 01:06:03 pm »
Quote from: Draco18s on July 12, 2009, 07:59:01 pm
World seed is irrelevant:
It's useful to have the seed on the record since this bug doesn't show up on most worlds.

As for moving the selector, I've tried shifting the selected area to different blocks, and haven't seen the aquifer indication vanish on either biome.
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Cespinarve

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Re: [40d12] Search selects aquifer when told not to
« Reply #7 on: July 25, 2009, 11:34:20 pm »
I have just had that bug show up in two worlds, one generated after the other. It's very vexing. What can be done?
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smjjames

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Re: [40d12] Search selects aquifer when told not to
« Reply #8 on: July 26, 2009, 06:15:18 am »
Maybe not use the site finder? I've had similar problems (plus it takes a long time to search in a large size world), so I stopped using it a long time ago.

Edit: Actually, I've decided to use it again since I have a tendency to lose track of a site easily :P
« Last Edit: July 26, 2009, 07:22:09 am by smjjames »
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ManaUser

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Re: [40d12] Search selects aquifer when told not to
« Reply #9 on: July 26, 2009, 09:29:59 am »
Just a wild guess, but is it possible that negative matches only ensure you have one biome without that element?
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Michael

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Re: [40d12] Search selects aquifer when told not to
« Reply #10 on: July 27, 2009, 12:28:04 am »
Quote from: ManaUser on July 26, 2009, 09:29:59 am
Just a wild guess, but is it possible that negative matches only ensure you have one biome without that element?
That is accounted for.  The seed and criteria given matches an area with two biomes.  Both have aquifers.
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