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[0.18.3] Train wagen ghost disappears after placing ghost belt
Posted: Tue Feb 18, 2020 10:47 pm
by AntiElitz
When placing this blueprint, the wagon ghost disappears when placing one of the belts. Works fine if the wagon is placed by bots first instead - so it's dependent on order.
https://clips.twitch.tv/PrettyWealthyCa ... arTheThing
Re: [0.18.3] Train wagen ghost disappears after placing ghost belt
Posted: Tue Jun 02, 2020 2:51 pm
by boskid
This is fixed for 0.18.30
Re: [0.18.3] Train wagen ghost disappears after placing ghost belt
Posted: Wed Jun 03, 2020 4:52 am
by posila
Just for future reference in case the fix comes back and starts to haunt us
boskid wrote: Tue Jun 02, 2020 2:51 pm
this is some corner case with collision masks (transport belt ghost overlaps onto rolling stock collision mask) and buildability check, when reviving transport belt, there is call to removeConflictingGhostsAndCorpses which does if (!ghost->innerEntity->buildabilityCheck(BuildCheckData::simple(BuildCheckType::GhostRevive)).isBuildable()) (Entity.cpp:474) and here, rolling stock is decided it is not buildable since it has no rail under it, but it does that because it is entity ghost and is not connected to rails - rolling stock ghost is deleted