MantisBT - Zandronum
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0002875Zandronum[All Projects] Bugpublic2016-10-09 22:452020-04-11 00:14
0002875: "smooth_mouse 1" potentially hard-coded into Zandronum's mouse behavior
Quote from unknownna
I recall that Torr told me that smooth_mouse does nothing in Skulltag/Zandronum [...]

Quote from Source comment
smooth_mouse doesn't do anything in Skulltag (Carn deactivated it long ago) [...]

Quote from unknownna
I noticed one difference between ZDoom and Zandronum with cl_capfps 0: The view is jittery in ZDoom and smooth in Zandronum when aiming and moving around at the same time. In ZDoom, you have to use "smooth_mouse 1" to make the view as smooth as Zandronum. Could it be that Carnevil hard-coded "smooth_mouse 1" into Skulltag's default mouse behavior and thus disabled smooth_mouse altogether?
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related to 0002861needs testing Edward-san smooth mouse movement option no longer toggles m_filter in 3.0 
Issue History
2016-10-09 22:45unknownnaNew Issue
2016-10-09 22:45unknownnaSeveritytrivial => feature
2016-10-09 22:46unknownnaDescription Updatedbug_revision_view_page.php?rev_id=9653#r9653
2016-10-09 22:54Edward-sanNote Added: 0015871
2016-10-12 00:52Ru5tK1ngNote Added: 0015913
2016-10-12 08:55Edward-sanNote Added: 0015917
2017-10-22 22:15LeonardAssigned To => Leonard
2017-10-22 22:15LeonardPrioritylow => normal
2017-10-22 22:15LeonardSeverityfeature => tweak
2017-10-22 22:15LeonardStatusnew => assigned
2017-10-22 22:15LeonardTarget Version => 3.1
2017-10-23 14:03LeonardNote Added: 0018619
2017-10-23 14:03LeonardStatusassigned => needs review
2017-10-26 19:26Torr SamahoNote Added: 0018626
2017-10-26 19:26Torr SamahoStatusneeds review => needs testing
2017-11-08 18:09LeonardNote Added: 0018819
2017-11-08 18:09LeonardStatusneeds testing => needs review
2017-11-12 14:37LeonardNote Added: 0018861
2017-11-12 14:37LeonardStatusneeds review => needs testing
2018-09-13 17:33unknownnaNote Added: 0019518
2018-09-13 21:12unknownnaNote Edited: 0019518bug_revision_view_page.php?bugnote_id=19518#r11785
2020-04-11 00:12Ru5tK1ngRelationship addedrelated to 0002861
2020-04-11 00:14Ru5tK1ngNote Added: 0021256
2020-04-11 00:14Ru5tK1ngStatusneeds testing => resolved
2020-04-11 00:14Ru5tK1ngResolutionopen => fixed
2020-04-11 00:14Ru5tK1ngFixed in Version => 3.1

2016-10-09 22:54   
To be more precise, the deactivated code is in r_utility.cpp line 591, marked with:

// [BC] This makes the mouse incredibly jerky for client games.

LocalKeyboardTurner saves the value of smooth_mouse when needed.
2016-10-12 00:52   
So should the menu option continue to toggle m_filter? I don't see anyone actively trying to use no smooth mouse if it causes jitter issues.
2016-10-12 08:55   
For now yes. This ticket can be kept open in case somebody wants to fix the discrepancy :P
2017-10-23 14:03   
Torr Samaho   
2017-10-26 19:26   
I added your pull request.
2017-11-08 18:09   
Just noticed there was a missing check for zandronum demos.
Fix PR here.
2017-11-12 14:37   
The fix was merged too.
2018-09-13 17:33   
(edited on: 2018-09-13 21:12)
The mouse feels more immediate, faster and less floaty in 3.1 compared to 3.0, and smooth_mouse seems to have an effect again. So I was correct in suspecting that Zandronum/Skulltag forced the mouse to be interpolated and thus slow the response down? The difference in response is now significant when playing with uncapped FPS and comparing 3.0 and 3.1 side by side. I remember people complaining for years on various forums that Skulltag's mouse felt slow and floaty compared to ZDoom and ZDaemon, and it's no wonder why when the mouse movement was forced to be interpolated. Zandronum 3.1 and ZDoom pre-2.4.0 (before mouse input was rewritten) feel pretty much identical now, with ZDoom maybe being marginally smoother when turning the mouse unless it's placebo.

And since smooth_mouse now works again, how about having the smooth mouse menu option toggle that again instead of m_filter? We decided to have the menu option toggle m_filter many years ago since smooth_mouse didn't work and ZDaemon toggled m_filter with the menu option. Now that it's more consistent with ZDoom and smooth_mouse works, the menu option should also toggle it again I think.

Thank you again very much for fixing this issue. I appreciate it a lot, and I'm sure that many competitive players will too.

Quote from Ru5tK1ng
So should the menu option continue to toggle m_filter? I don't see anyone actively trying to use no smooth mouse if it causes jitter issues.

I think the jitter might've been a separate ZDoom issue that was seemingly fixed in recent GZDoom versions. For some reason ZDoom didn't like SR50 aliases with cl_capfps 0, where you strafe and turn a direction at the same time while moving the mouse. The only way to "fix" the jitter was to turn on smooth_mouse in ZDoom. This issue is/was not present in Zandronum.

Command=-left; -moveleft // Moving mouse with this causes jitter in older ZDoom.
Command=-right; -moveright // Moving mouse with this causes jitter in older ZDoom.
Command=turnspeeds 65536; +strafe
Command=turnspeeds 0; -strafe

2020-04-11 00:14   
Since unknownna tested and verified issue is resolved, I'll reopen 2861 to focus on the menu options aspect.