* Duke/RR: Fix `SB_CENTERVIEW` not clearing while `cl_syncinput 1`.
* Duke/RR: Remove superfluous call to `apply_seasick()`.
* RR: Change two calls from `playerSetAngle()` to `playerAddAngle()` Updated version of `playerSetAngle()` doesn't stop setting angle until target is reached, a bit too strict for this and compromised vehicle turning.
* `applylook()`: Remove dead flag. Was only used with Duke, no other game called the function when dead anyway. Since the input helpers are processed outside of `applylook()` now this is not needed.
* `applylook()`: Extend function with a bit of commentary.
* For Blood/SW, exposes `SB_LOOK_LEFT`/`SB_LOOK_RIGHT` to games, hooking up `q16look_ang` and `q16rotscrnang` within.
* For SW, use Duke & Blood's return to center function and remove `PF_TURN_180` bit.
* For RR, replace a few misused bits with some bools inside of `player_struct`.
* Since bulk of functionality is sourced from Duke (30Hz), apply proper scaling so SW speed matches (40Hz).
* For Duke/SW, we continually apply `SB_CENTERVIEW` only if it was previously a toggled action, similar to Blood.
* For SW, we remove two SW-specific bits (`PF_LOCK_HORIZ` and `PF_LOOKING`) that are no longer needed.
* For Duke, we remove `return_to_center` and just use the `SB_CENTERVIEW` action bit as required.
* For `sethorizon()`, feature set and adjustment speeds are an averaged out accumulation across Duke/SW:
** GameTicRate is factored in for adjustment decisions to provide consistency for SW being the faster game.
** Adjustment amounts are half way between Duke/SW.
* Doesn't matter for Blood, but will matter for SW in a unified approach. Might as well get it right here.
* Appreciate the literal doubles in lieu of the enums isn't great, but this function will go into the backend in due course.
* Horizon now standardised on 100 like the other games.
* Need to determine where/why/how the player's horizon is starting out at 0 and get it to init at 100 like the other games.
* Split input bits and movement into separate functions.
* Reordered movement to be more like Duke/SW for ease of comparison.
* Removed a global.
* Removed a few includes.
* Looking up/down is a bit rough at first as q16look is disproportionate to where the player is currently looking.
* Won't be an issue with a unified horizon algorithm in the backend.
* Changed config so `cl_interpolate` bool doesn't apply to player's overall movement. While it might be handy for debugging moving sector objects, I see no valid reason why there'd be a need to ever un-interpolate the player's position.
This unexpectedly turned out a complete rewrite so now it is under my own license.
Also moved the remaining parts of map hack loading into the engine.
Overall I have to say that the feature is not what I expected, it's merely used to fudge the positioning of model sprites and for adding Polymer lights.
This isn't active, though, because load times are so short these days that all this results in is an irritating screen flash before the level starts.
It may be activated later when hires assets are in use.
Fixes#10 (or not...? ;) )
Also optimized the base64 encoder to avoid creating endless memory copies, thanks to using std::string which is a really poor container for this kind of stuff when workig with larger blocks of data.
* Provide read-only/const results from `CONTROL_GetInput()` so games can't change received input.
* Change non-descript `info` to `hidInput` (Human Interface Device).
* Remove a few unused prototypes.
