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0007716Dwarf FortressDwarf Mode -- Petspublic2014-07-29 11:542015-03-14 10:07
0007716: Cats jumping/falling down central stairwell
I have received several combat reports from cats colliding with the ground right next to my central stairway; the only logical conclusion is that they are falling down the stairwell. The stairway is 3x3 with no open space, so if they are climbing they're doing it on an up/down stair tile. The cats are pastured in a 3 tile ring around the stairwell (the stairwell tiles are not included in the pasture). They seem to only land in tiles diagonally-adjacent to the corners of the stairs, so I suppose it's possible they were attempting a corner-to-corner jump. The falls seem to consistently be 4 z-levels, though one kitten did explode into pieces after a much longer fall.
No tags attached.
related to 0007745new  Cat constantly tries and fails to climb out of a river canyon, ignores ramps I dug on the other side of the river 
related to 0007574resolved Toady One Children assigned to burrows become accident prone 
Issue History
2014-07-29 11:54LociNew Issue
2014-07-29 12:03dree12Note Added: 0027883
2014-07-29 12:16TalvienoNote Added: 0027885
2014-08-02 05:22TalvienoNote Added: 0028134
2014-08-02 05:23TalvienoNote Edited: 0028134bug_revision_view_page.php?bugnote_id=0028134#r10642
2014-08-11 11:20LociNote Added: 0028816
2014-08-11 11:39FootkerchiefRelationship addedrelated to 0007745
2014-08-11 11:39FootkerchiefRelationship addedrelated to 0007574
2014-08-11 11:40FootkerchiefNote Added: 0028818
2014-08-11 11:40FootkerchiefAssigned To => Footkerchief
2014-08-11 11:40FootkerchiefStatusnew => needs feedback
2014-08-11 13:38LociNote Added: 0028827
2014-08-11 13:38LociStatusneeds feedback => assigned
2014-08-12 13:31LociNote Added: 0028897
2014-09-05 13:364maskwolfIssue Monitored: 4maskwolf
2015-03-14 09:50LociNote Added: 0032377
2015-03-14 10:07Afghani84Issue Monitored: Afghani84

2014-07-29 12:03   
You would think, with Legendary Climber, they would be able to grab on to a wall...
2014-07-29 12:16   
They're pastured in a ring. I think it's very possible two of them are trying to jump across from each other and colliding mid-air, which would cause them both to lose their velocity via the projectile code.
2014-08-02 05:22   
(edited on: 2014-08-02 05:23)
Would like to add to this. It's also possible that this is related to this bug: 0007745. This bug is where certain cliff walls act like they're climbable, but drop the climber after he goes up one z-level. This would have the exact same effect as what you're noticing. Either way, a save would've been useful.

2014-08-11 11:20   
Possibly related to 0007574; both involve creatures whose movements have been constrained by designated boundaries. Several cats managed to collide with stationary minecarts on the levels below.
2014-08-11 11:40   
Is it possible that the cats are fighting, causing them to dodge into the stairwell?
2014-08-11 13:38   
Maybe, but unlikely. I've seen no combat reports mentioning a cat fight--they always just start with the cat hitting the ground or a stationary minecart.
2014-08-12 13:31   
I don't know if it's related, but after watching for a few minutes, I've noticed that cats pastured in a ring around a stairway regularly move into the stairway tiles, at which point they are outside their pasture, so they start to wander away. This appears to happen in the absence of dwarves (one of the long-standing ways for animals to escape a pasture).
2015-03-14 09:50   
http://dffd.bay12games.com/file.php?id=10679 [^]