Add a cvar to control camera bob factor

[Calinou]

This allows disabling camera bobbing without disabling weapon sprite bobbing. The landing camera effect is not affected by this cvar.

This is a multiplier, which means 1.0 is the original behavior and 0.0 fully disables camera bobbing (including stillbob, but not fly bobbing, which is controlled by the fviewbob boolean cvar).

This partially addresses #1934.

Preview

Using the following settings:

camerabob 0.0  // disables camera bobbing
movebob 0.015  // strongly decreased to better mesh with the doubled weapon bob speed from this example
stillbob 0.0   // default
wbobspeed 2.0  // doubled from default
wbobfire 1.0   // keeps full weapon bobbing while firing

out.mp4

[RicardoLuis0]

this doesn't feel like the right approach to me, IMO instead of adding a multiplier for view bob, the better option would be to decouple the movebob/stillbob CVARs from weapon bob entirely, with a separate weaponbob CVAR for weapon bobbing

[MajorCooke]

I'll hold off merging this into QZDoom until a dev can review the code first.

[CandiceJoy]

this doesn't feel like the right approach to me, IMO instead of adding a multiplier for view bob, the better option would be to decouple the movebob/stillbob CVARs from weapon bob entirely, with a separate weaponbob CVAR for weapon bobbing

I tend to agree with this. It feels more like a bandaid than a true fix. But that’s just my 2 cents ^_^

[RicardoLuis0]

reiterating:

instead of adding a multiplier for view bob, the better option would be to decouple the movebob/stillbob CVARs from weapon bob entirely, with a separate weaponbob CVAR for weapon bobbing