This includes loading a level and busy-waiting for a sound to play.
Also block these loops and the sounds they wait for in network games to avoid problems from longer delays here.
The problem seems to be directly inherited from ZDoom which shows the same issue with screen wipes.
Fixes#297
* 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
Timer values in interface code are undefined, these should not access anything that changes at real time.
Also use smoothratio to do the calculation in frame time, not tic time.
This has a threshold that could lead to different behavior, depending on whether synchronized or unsynchronized input is used, it also used an undefined state of gameclock for its calculations.
By basing this on the levelclock consistency is ensured.
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.
* On the fence about this. Lower makes the game harder, and higher could mean the difference between life and death. I do think that if we're showing amounts in the magazine, full ammo should constitute a full magazine. I think the max of 200 is an oversight from the original devs as all other games have proper defaults that reflect the magazine or cylinder capacity.
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.
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.
* I doubt anyone will be running this on a system where computing a tic might take longer than a tic, but it's more consistent with the other games and is what it was.
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.
