fixed physics generate excessive speed

[ETLegacyTeam]

Author: @isRyven (ryven)
Date: 2019-12-29
Redmine Issue: 1379, https://dev.etlegacy.com/issues/1379

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g_fixedphysics generate more speed than pmove_fixed alone, making movement less consistent, for instance some tj tricks are more approachable than they should, and some are failing because you would get damage on landing.

[ryzyk-krzysiek]

I tried modifying ryven's patch, which had problem with occasional rubber banding which was seemingly caused by antiwarp. I didn't encounter rubber banding with the code I added to antiwarp but it was hard to encounter it in the first place, so I'm not 100% sure it would be a fix and/or if it would break gameplay too as I didn't test it on server with players. I tried using cg_showmiss but it didn't show any prediction errors with or without the antiwarp code part, even when I was feeling some rubber banding.

Anyway there is much bigger problem I encountered with this patch, maybe I did something wrong since I didn't take all the code from the patch, but only parts that I felt are most relevant and that should have impact on physics.

The problem is that this change affects weapon handling heavily, for example at g_fixedPhysicsFps 333 there is a big delay when weapon switching and time between bullets.

https://streamable.com/5wpfz6

I have no ideas what to do about it.

fixedPhysicsWithAntiwarp.patch.txt

@isRyven any thoughts? :)