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IDProjectCategoryView StatusDate SubmittedLast Update
0002382Zandronum[All Projects] Bugpublic2015-08-09 12:452017-04-20 05:59
Assigned ToEdward-san 
PlatformOSOS Version
Product Version2.1 
Target Version3.0Fixed in Version 
Summary0002382: Special MinotaurFriend desync in Hexen causes it to stand still on client-end: Target issue
DescriptionUnder certain circumstances the MinotaurFriend actor will desync very badly on the client-end. What happens is that the monster will seem to be moving without actually moving. The animation plays and it moves on the server-end, but it's stuck on the client-end.

* MinotaurFriend spawned by ArtiDarkServant desyncs when no enemies are nearby. Stops desyncing when enemies appear.
* MinotaurFriend spawned by "summon" command desyncs until death. Doesn't target enemies offline.
* MinotaurFriend clone spawned by map and/or "summon" command doesn't desync at all.
* MinotaurFriend clone using different "Goto Super::" desyncs until death. Doesn't target enemies offline.
Steps To Reproduce1. zandronum -iwad doom2.wad -file minotaur_desync.wad -host
2. zandronum -iwad doom2.wad -file minotaur_desync.wad -connect localhost
Additional InformationIt's very confusing since it seems that inheritance has an effect here. And whether the monster was summoned or spawned through an item (ArtiDarkServant) also makes a difference apparently.

There's also a separate issue with sprites not showing and the fade (A_SetTranslucent) not working properly due to a separate timing issue.
Attached Files? file icon minotaur_desync.wad [^] (688,253 bytes) 2015-08-09 12:45

- Relationships
related to 0002338resolvedEdward-san Monster desync by dead monsters unblocked by A_NoBlocking in item pickup 

-  Notes
User avatar (0013528)
cruduxy (reporter)
2015-09-18 00:11
edited on: 2015-09-18 00:13

I think the decorate of the actor in current zan is what causes this problem. The actor had -if not changed, didn't check- a different spawn\See state than the one on the zdoomwiki which seems to be a fixed version of the one in zan. Causing the maulotaur to do nothing but enter its pain state over and over. Randomly attacking when it gets hit.

Edit : Clarified the intended wiki is the zdoom wiki. Specifically this page Classes:MinotaurFriend .

User avatar (0016565)
Edward-san (developer)
2016-12-29 10:35

Can somebody build [^] and check if the desyncs are gone?
User avatar (0016568)
WaTaKiD (updater)
2016-12-29 14:45

this 3.0 build contains the above commit: [^]
User avatar (0017076)
Torr Samaho (administrator)
2017-04-02 09:38

Since there was no feedback for months and the patch looks reasonable, I added it.
User avatar (0017233)
Combinebobnt (reporter)
2017-04-19 23:21


Tested online in tspg coop. One of the minotaurs was still badly desynced and it never moved despite being in its moving animation. Could phase through were it spawned but I would collide with its real serverside actor as thin air. The normal minotaur and dark servant ones were better as they at least moved and attacked. I think the wad has a missing frame too, not helpful...
User avatar (0017239)
Torr Samaho (administrator)
2017-04-20 05:59

Is 2.1.2 behaving any better than 3.0 in this regard?

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Supporters: cruduxy
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- Issue History
Date Modified Username Field Change
2015-08-09 12:45 unknownna New Issue
2015-08-09 12:45 unknownna File Added: minotaur_desync.wad
2015-08-09 12:45 unknownna Status new => confirmed
2015-08-09 12:58 unknownna Relationship added related to 0002338
2015-09-18 00:11 cruduxy Note Added: 0013528
2015-09-18 00:13 cruduxy Note Edited: 0013528 View Revisions
2016-12-29 10:35 Edward-san Note Added: 0016565
2016-12-29 10:35 Edward-san Assigned To => Edward-san
2016-12-29 10:35 Edward-san Status confirmed => feedback
2016-12-29 10:35 Edward-san Target Version => 3.0
2016-12-29 14:45 WaTaKiD Note Added: 0016568
2017-04-02 09:38 Torr Samaho Note Added: 0017076
2017-04-02 09:38 Torr Samaho Status feedback => needs testing
2017-04-19 23:21 Combinebobnt Note Added: 0017233
2017-04-20 01:01 Ru5tK1ng Status needs testing => feedback
2017-04-20 05:59 Torr Samaho Note Added: 0017239

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