* When interpolating on the initial setup, when binangle reached an overflow point when going lower than zero, the engine was spinning the player around clockwise to the new angle (2047, for instance).
* Interpolating after casting as uint64_t with a workflow similar to the original games, the issue went away.
* Cleaned up other interpolation functions to be of a consistent workflow.
* Scale keyboard input turning down to degree speeds.
* Uplift some remaining Q16.16 code in `applylook()` to full BAM precision.
* Move static calculations of aim and look speeds for `sethorizon()` back into function since GameTicRate isn't set right before calculation is done.
* Simplify the angle target setup back to a basic value like before.
* Repair SW interpolation issues of weapon sprite drawer when rotating left/right.
* Fix SW death horizon constant values following change of horizon center to 0.
* 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).
The remaining excpetions are the "give" CCMD and any level change action.
Unfortunately the implementation of most cheats is not multiplayer safe so right now it'd only be useful for demo recording (assuming that worked to begin with... ;))
* Remove fix16.h/cpp and utilise library from m_fixed.h.
* Extend m_fixed.h with two inline functions for int to/from float operations.
* Replace fix16_floor operations with those from xs_Float.h
* Replace multiple Q16.16 conversions from 0 to just be 0.
* Replaced all found in-game bit-shifts and multiplications/divisions with inline functions from m_fixed.h
* Replaced many casts of FRACUNIT as double in SW's panel.cpp as it is converted to double by way of type promotion.
* Fixed missed precision fixes in SW's panel.cpp where some types weren't declared correctly.
* Replaced 100+ `Cos()/Sin() >> 16` operations for Blood with inline functions `CosScale16()/SinScale16()`.
* SW does not have any special characters in its BigFont, so currently there's no divider between ammunition amounts. This is to be discussed on the PR.
* Given the original code in `pNukeAction()` (poorly named), the intent appeared to be that the weapon should go off-screen for preparation, returning once weapon initialised.
* Commit restores that behaviour behind a CVAR.
# Conflicts:
# source/core/gamecvars.cpp
# source/core/gamecvars.h
* If there was a `pNukePresent()` function, that's where the commented out code belongs.
* I believe the rocket switching type was simplified during development and this is just an omission that's now obvious with interpolation. Only just, but you can notice this in an uninterpolated state while bobbing.
* Fixes#212.
