Fix desynch when a player spawns

This fixes a common, longstanding bug where a player spawning/respawning can randomly desynch the game.

This issue was caused by a nasty hack, however simply removing that hack was not enough, as it was added to prevent an inconvenient glitch where players would spawn in the wrong direction depending on their input lag.

In order to fix that properly, I made angleturn a relative value when sending packets, and turning it back into an absolute value before running the gamelogic. That way, gamelogic events (spawning, hitting a spring, etc), which cannot be predicted at time of calling G_BuildTicCmd, can change the player's angle without any delay caused by latency.

added 63 commits

• c6e13d0e...b13f2985 - 62 commits from branch next
• e2b860dc - Merge branch 'next' into 'fix-spawn-desynch'

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Can you incremement DEMOVERSION in this branch as well? Because this breaks it hard. Y'all'd need to re-record the title screen demos, too.

(You could also make Metal Sonic run off a different DEMOVERSION to normal replays, the previous value - because the Metal replays will still function aside from that - those are positional only, no ticcmds.)

Had a private talk with toaster, turns out it was a false alert.

added 1 commit

• 9be188ff - Minor edit

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resolved all discussions

merged

mentioned in commit 191e2e09