Physics issues - Falldamage on slopes - Randomly "ducking" on slippery/icey surfaces

[Chrissstrahl]

• Issue occures on all levels, in SP and MP, best observed in Multiplayer.
• Occures on Windows and Linux.
• Issue is also pressent on the Patched 1.1 gamex86.dll, but it does NOT do falldamage.
• My guess is that falldamage is caused by bad code when using modern more accurate compilers.
• Slopes are exactly angled 45° facing towards the player like a ramp
• similar behaviour is occuring if player slides down a pipe build from a patch-mesh
• slipery(SURF_SLICK) surfaces cause the player viewcam to randomly duck (swsglobe)

You might have to noclip exactly at the place or use: script $player origin "x y z"
Paste text with the middle mousebutton into the game console.

1. m9l1b-klingon_base
Origin: 2442 1458 485 - On level start jump on the pipes on the $player origin "2442 1458 485"
right side and try to get stuck between two pipes the view/player
cam starts to tilt and roll now crouching will kill you with falldamage
This is easy to reproduce

2. m5l2b-drull_ruins1
Origin: 11093 81 200 - On the angled Incubation Tube near the Lifts. $player origin "11093 81 200"
when sliding slowly down, this is difficult to reproduce

3. swsglobe (only g_gametype 1/multiplayer)
This is very easy to reproduce.
Link: https://www.gamefront.com/games/elite-force-2/file/sws-globe
File: SWSxmas.pk3
Mapname: swsglobe
Instructions: Approach the center platform on one of the 4 slopes, even if you aproach very slowly it will push you away on high speed after it killed you with falldamage.

Issue is probably related to "PM_WalkMove" or "void PmoveSingle (pmove_t *pmove)" and "pm->landedVelocity" in bg_pmove.c