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IDProjectCategoryView StatusDate SubmittedLast Update
0002956Zandronum[All Projects] Bugpublic2016-12-10 13:242018-12-10 14:45
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PlatformOSOS Version
Product Version 
Target VersionFixed in Version 
Summary0002956: A_Wander online desync
DescriptionA_Wander causes a lot of jittery movement and warping, especially when compared to A_Chase, I'm not sure if this is because of an actual desync, or an error in the movement interpolation. On a side note, when A_Wander is first called, the actor will walk in place for a few seconds. This has been reproduced in 3.0 r161030-2038
Attached Files? file icon wandering doom.wad [^] (15,852 bytes) 2016-12-10 14:20

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-  Notes
User avatar (0016456)
WaTaKiD (updater)
2016-12-10 13:42

please provide an example wad
User avatar (0016460)
Lance (reporter)
2016-12-10 14:26

Provided an example wad. All monster defintions are from ZDoom wiki, with all instances of A_Chase insisted with A_Wander. On a side note, this occurred when testing a mod of mine online with a friend, and I used A_Wander for a subsitute of A_Chase to compensate for the same functionality, but without the missile chance. He claims that he shot an enemy 3 times, and all his shots went through him. I believed him since I was coop-spying him and the enemy was moving erratically and warping. This was with hitscan, however, we haven't tested it with projectiles
User avatar (0016473)
Filystea (reporter)
2016-12-12 00:37

I use a lot A_Wander (half monster use it) in my mod from stable version till ZandroDev3.0-161030-2038linux-x86_64.

Linux zandronum 4.8.0-2-amd64 #1 SMP Debian 4.8.11-1 (2016-12-02) x86_64 GNU/Linux

Never had single problem with this.

Check your code 10x, probably some other thing cause this.
User avatar (0016478)
Lance (reporter)
2016-12-12 14:01

Understood, but I'm certain of the desync after many tests online and offline. I've provided an example wad where all occurrences of A_Chase has been replaced with A_Wander. Since ZDoom intended A_Wander to function the same as A_Chase, putting it in place of base ZDoom code would be a perfect way to demonstrate proper use of the function
User avatar (0020239)
hyades (reporter)
2018-12-10 14:43
edited on: 2018-12-10 14:45

I support this case. I dont know about problems with regular A_Wander, but I want to notice that using A_Wander through in items does not move the actor at the clientside, but moves it at the serverside, so the actor is "teleporting".

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- Issue History
Date Modified Username Field Change
2016-12-10 13:24 Lance New Issue
2016-12-10 13:42 WaTaKiD Note Added: 0016456
2016-12-10 14:20 Lance File Added: wandering doom.wad
2016-12-10 14:26 Lance Note Added: 0016460
2016-12-12 00:37 Filystea Note Added: 0016473
2016-12-12 14:01 Lance Note Added: 0016478
2018-12-10 14:43 hyades Note Added: 0020239
2018-12-10 14:45 hyades Note Edited: 0020239 View Revisions

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