* 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
The frame rate cap is only deactivated if there's actual animations running so that leaving the game in the menu won't make the engine run at high frame rates.
Fixes#288.
This timer only gets incremented by the main game ticker when the playsim is running.
This timer gets used for all playsim-related timing and animations so that these are decoupled from imprecisions in the global timer.
The new main loop code cannot handle that. Instead set a start value for gameclock so that gameclock can be based on an arbitrary time value instead of directly representing global time.
* moved the part that alters the input before queuing it to GetInput
* moved moveloop into the main function
* reshuffled a few things for better grouping by task.
This not only was redundant with m_filter, even worse, it was in the wrong place.
Control_GetInput is used to read the current input state from the backend and can get called at uneven intervals, or even multiple times during the same frame, so smoothing the movement here can lead to erratic behavior.
With this change CONTROL_GetInput will return the same data unless it gets updated between calls.
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.
