This adds a type-safe TIMESTAMP, similar to UI_TIMESTAMP. Eventually all of the FSO codebase will be switched over to this new type. In the meantime, just the supernova code is switched over.
A bit of cleanup, refactoring, and bugfixing...
1) The supernova code now uses enums to represent states, and those state transitions now all happen in `supernova_process` instead of being scattered around.
2) Some state transition bugs were fixed - e.g. the HUD is now disabled when the camera cuts to the external view, instead of when the camera stops moving; and the particles start and the simulation stops when the comments say they do.
3) There is now a game_settings.tbl flag to make the HUD countdown timer reach zero when the supernova hits, instead of reaching 5s. This only affects the HUD display; actual timing is not changed.
4) Don't apply lightshafts if the supernova glare is in effect - partial fix for #4152.
This adds a new class which allows to create type safe resource handle
types. At the moment, the engine uses ints pretty much everywhere for
providing handles to resources created by the specific subsystems. Since
all ints are the same to the C/C++ typesystem it is perfectly legal to
pass a sound handle to the graphics API as a buffer handle which will
obviously cause issues.
This adds a new type called "ID" which is a wrapper class for a generic
handle but with added type safety. An instance of this class cannot be
passed to a function expecting another type of handle which provided
compile-time type safety for these APIs.
As an initial test I converted the game sound handles to this new type.
I already found a bug in the mainhall system thanks to this new type.
The mainhall used the game sound handles as sound instance handles which
probably meant that that specific code never really worked right. I
removed the code since there was no better alternative for fixing it.
Goober5000