0009043: Minecarts retain rider's weight after a ride - Dwarf Fortress Bug Tracker

ID	Project	Category	View Status	Date Submitted	Last Update

0009043	Dwarf Fortress	Dwarf Mode -- Transport/Hauling	public	2015-08-14 12:27	2017-04-01 01:59

Reporter	Larix2	Assigned To
Priority	normal	Severity	minor	Reproducibility	always
Status	new	Resolution	open
Platform	PC	OS	Windows	OS Version	XP
Product Version	0.40.24

Summary	0009043: Minecarts retain rider's weight after a ride
Description	If a minecart is ridden to a route stop and the rider dismounts, the cart's listed weight still includes the weight of the rider.
Steps To Reproduce	Order cart movement via riding. Let the rider dismount. Check the cart's weight.
Additional Information	An empty maple cart by itself weighs 21kg. When ridden by an 88kg (with clothes) dwarf, it shows 109 kg during _and after_ the ride. Looking at the empty cart via "k" will show the erroneous excessive weight, dwarfs get slowed down significantly by the "invisible dwarf" in the cart when hauling it and pressure plates calibrated to only trigger on a dwarf-bearing cart will still be triggered or kept active by the empty cart. A new ride order updates the weight to account for the weight of the new rider instead of the old, but further vehicle movement or hauling events tend to have no effect, the erroneous weight stays intact. The only sure way to reset the empty cart to its proper empty weight seems to be saving/restoring the game. I've only checked normal (non-lethal) dismounting when bumping into a wall at a route stop, not collisions that throw a dwarf out of a cart. Save:http://dffd.bay12games.com/file.php?id=11060
Tags	No tags attached.

Larix2 2017-04-01 01:59 reporter ~0036390 Last edited: 2017-04-01 02:01	Update for 0.43.05 The bug still exists, but i had some interesting new findings: New save here: http://dffd.bay12games.com/file.php?id=12802 Hotkey F2, Route 10 Commands are: ride south from 1, push east from 3, ride north from 4, push west from 2 (expanded a two-stop track, thus the messy stop order). All pressure plates react on track vehicles only, the northern and southern one are 100+, the eastern one 1000+. On each cycle i've observed so far, the northern plate always activates, the southern one never (neither does the eastern one). In both cases, a pushed wooden cart passes over them, which should have a weight of 24. It looks like * Minecarts preserve the rider's weight as part of their "empty" weight if they are "measured" (via 'k'-view tile command or pressure plate) during the ride. * The ride over the "unmeasured" western side properly resets cart weight when the ride stops, the ride on the eastern side preserves rider weight (can be observed after riding/pushing at stops 2 and 1) because the pressure plate checks the weight; that it fails to trigger the 1000+ condition is immaterial.

Date Modified	Username	Field	Change
2015-08-14 12:27	Larix2	New Issue
2015-08-14 12:30	Larix2	Tag Attached: minecart
2015-08-25 19:28	lethosor	Tag Detached: minecart
2016-07-18 14:36	Loci	Relationship added	related to 0005088
2017-04-01 01:59	Larix2	Note Added: 0036390
2017-04-01 02:01	Larix2	Note Edited: 0036390