* 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.
* 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.
They need to be reset when level data gets set because the current value is used as base.
It was most easily observed at the start of the first level where the grave only would open after a lengthy delay - which was the play time of the last level being played.
* 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()`.
This is because 'classic' aim mode will reset the view if the mouseaim key is not pressed.
The problem with this is that an empty input packet will trigger a view reset. If the meaning is inverted the default aim mode is free mouse view which doesn't try to alter any view state and is therefore preferable for an empty packet.
Fixes#292
In particular this means to remove the option to disable widescreen aspect ratios. The way this was handled makes no sense with the current render backend.
The aspect ratio code will have to be redone entirely to properly obey the backend's settings.
None of this was really working anymore, but will have to be rethought once a network stream exists again.
But even then, this is better sent as a separate command, and in MP only.
Currently the bit fields are still separate and they have to be merged, but for now the added memory does not matter.
Having this structure in the common parts will allow work on consolidating the input code, though.
Whatever this was for it made that thing extremely unwieldy.
With these merged the resulting structure doesn't look much different from Duke's anymore.
This removes most of the InputState class because it is no longer used.
The only remaining places still checking scan codes are the modifiers for sizeup and sizedown.
All the rest was remapped to safer methods. The multiplayer taunts are currently inoperable, they will need support of shift-bindings to get proper support.
* moved Smacker video playing code into the backend, so now all games can play all supported video formats
* logos and level intro/exit videos use ScreenJob
* Calculate game-side mousex/mousey divisions into the calculations performed in `InputState::GetMouseDelta()`.
* Fix mouse speed when `in_mousesmoothing` is true (wasn't factoring in / 3.f division used in non-true vector.
* Standard mouse forward/side movement speeds in Exhumed & SW with that of other games.
* Remove `strafeyaw` code from Duke/Exhumed/RR as it's not necessary and was leading to situations where the player would continually keep moving sideways even without input.
* Change mouse forward/side velocities to -= current value as is done with controller input and the player's angle/aim velocities.
* Convert axes in ControlInfo struct from int32_t to float as what's received from the backend.
* Remove all the scale up/down math since we don't need that with floats and replace with float constants that match old behaviour.
* Store q16mlook scaling as a constant for use with mouse and upcoming controller code.
* Add required controller code to Blood as the only game not to have working controllers.
* Fix typos in (gInput.forward > input.forward) for `ctrlGetInput()` in Blood.
* Remove use of `scaleAdjustmentToInterval()` on Exhumed and Shadow Warrior as they only process forward/side velocities within the game's ticrate.
* Repair angvel/aimvel scaling mistakes from d79a5d256d.
* Scale dyaw and dpitch by 25% for Shadow Warrior as the game runs 25% faster than the other games, leading to faster input.
