* Rename a few variables for better clarity as to what's going on.
* Add new inline to the backend `getWrappedIndex()` that properly wraps around negative values based on the supplied maximum using modulo.
* Directly set the weapon when doing the next/prev tests to avoid unnecessary tests to see whether the player has the weapon or not.
* Ensure's a smooth return to 0 so the player's actual pitch can be targeted towards Ramses.
* In situations where the player had their view pitch changed in the ticker, this would have never reset.
* When I read this against the generic weapon pickup code, it looked similar enough but the grenade's logic is reversed. That is, after picking up the weapon, equip the player. The generic weapon handler equips the player, then gives them ammo.
* Fixes#904.
* It needs to come after the function it's been moved into, but its confusing why its calculating a new pos delta when there's one on the stack.
* By directly nesting it in, it's a lot clearer.
* We can just pass the needed value into `doPlayerPitch()`.
* For Ramses, no need to set `nDestVertPan` to the map value, just use the map value.
* Avoids an excess `atan2()` call by way of `maphoriz()`.
* Use `maphoriz(-11)` instead of some voodoo degree amount so it's clear when comparing sources.
* Don't stop interpolating while doing Ramses.
* Apply Ramses pitch amount to `nVertDestPan`, just like the original.
* Don't reset all angles when initialising Ramses, just set the yaw angle.
* Don't return player's view to center when doing Ramses, use the delta between `nDestVertPan` and the player's pitch, using same formula as original.
* Comment in how normal/non-ramses `nDestVertPan` setting should be 8x the sprite Z move delta, not 2x. I know it's not correct, but its been this way for a long time and we probably should CVAR it.
* When doing the player's death pitch, it's 40.156 degrees (horizon of 108), not 38 degrees (horizon of 100). This was a misread of mine way back when.
* Was dropped in 572869f502.
* Game's crouch testing necessitates that this value be pre-cached.
* Interestingly, this value is 62.5 whereas the game's view height is 55. Change in late development to make the world feel larger?
* Remove some extern'd CVARs that didn't need externing.
* Change `player_struct::centeringView()` bool into proper method to handle the operation.
* Operation now properly unsets `SB_CENTERVIEW` if conditions aren't met instead of relying on implied behaviour from the rest of the playsim.
It depended on the devoured actor not disappearing from the map prematurely to work as intended, so a new check had to be added to get out of the deadlock.
* Originates from d976a6da01.
* During change I missed the clamping of the zvel value between capturing `zz` and `zVel`.
* No observed issues, only noticed it when comparing something else but lets 100% maintain a accurate workflow.
ColorMatcher.Pick is not correct here, fortunately we do not need this for fog setup as it never uses the lookup so just do a normal copy of the first (fullbright) table.
