0006068: Minecarts falling onto a floor injure creatures directly below the floor

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Project

Category

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Date Submitted

Last Update

0006068

Dwarf Fortress

Dwarf Mode -- Transport/Hauling

public

2012-07-03 12:50

2013-11-01 08:18

Reporter

Trif

Assigned To

Priority

normal

Severity

minor

Reproducibility

always

Status

new

Resolution

open

Platform

Windows 7

OS Version

64 Bit

Product Version

0.34.11

Target Version

Fixed in Version

Summary

0006068: Minecarts falling onto a floor injure creatures directly below the floor

Description

Basically, the creature under the tile on which the minecart lands behaves as if it had collided with the minecart - it gets propelled through the air, skids on the ground, the typical minecart injuries.
This only works with minecarts, other landing objects are harmless.
I also tried to apply Newton's cradle, i.e. a minecart landing on a minecart positioned on a floor over a creature - the creature remained unharmed.

I think the problem is that minecarts handle vertical collisions like horizontal collisions and fail to check if there is anything between the minecart and the creature.

Steps To Reproduce

Dig a shaft, 3 z-levels deep, one tile wide.
Build a floor in the middle and pasture an animal at the bottom like so.
__ __
|_|
|a|

Drop a minecart into the shaft. Even though it lands on the floor, the animal gets injured.

Additional Information

A save is available here: http://dffd.wimbli.com/file.php?id=6613 [^]

Tags

collision, minecart

Attached Files

Relationships

related to	0005996	new		Minecarts can teleport through walls.
related to	0010320	new		Floor level is considered differently for standing and bouncing dwarfs.

Notes
(0023146) Quietust (reporter) 2012-07-03 18:49	See also: 0005996, 0005970

(0023169) Trif (reporter) 2012-07-06 04:19	I don't think those are related. This bug occurs with falls of any height - the minecart doesn't teleport through the floor, it just hits the creature through the floor.

(0024190) Kumquat (reporter) 2013-11-01 04:54	I just had a random stray dog killed by this. The dog was in a dining room. The minecart dropshaft ends with a ramp on the level above. The cart itself, full of ore and flux, made it successfully to its final stop.

(0024191) Footkerchief (manager) 2013-11-01 08:18	There's at least a thematic relationship between this and 0005996, which is good enough for me.

Issue History
Date Modified	Username	Field	Change
2012-07-03 12:50	Trif	New Issue
2012-07-03 12:53	Trif	Tag Attached: minecart
2012-07-03 12:53	Trif	Tag Attached: collision
2012-07-03 18:49	Quietust	Note Added: 0023146
2012-07-06 04:19	Trif	Note Added: 0023169
2013-11-01 04:54	Kumquat	Note Added: 0024190
2013-11-01 08:17	Footkerchief	Relationship added	related to 0005996
2013-11-01 08:18	Footkerchief	Note Added: 0024191
2017-11-05 12:32	Loci	Relationship added	related to 0010320