For quite some time missions have had the ability to edit more than one background. This was previously used for fallback loading in case the first background's bitmaps were not available, but I realized it would be very handy to allow switching between backgrounds for in-mission jumps.
The FRED background dialog can now add and remove backgrounds from the list. Additionally, a new `change-background` sexp can instantly switch between backgrounds without messing around with bitmap references.
This adds a new graphics type for the Vulkan graphics API. All this does
is to create a vulkan instance and a presentation surface with the help
of SDL.
This is a system for storing arbitrary data in the config file and then
easily retrieving it later on. This has full Lua support for exposing
the available options in a custom UI and changing the values of the
options. This ported some of the existing command line options over to
the new system which is opt-in for the moment by using a mod_table flag.
Specifying the fog rendering options is now handled by the materials
system and the implementation of gr_set_fog was pretty much empty so I
removed it.
All transformations are now handled by shaders so there is nothing
special going on in the graphics API specific code anymore. Since model
uniform buffers require access to these matrices I moved the matrix
handling out of the graphics API code.
This should make sure that the environment map is only redrawn if
necessary. In my case that should improve frame times by around 1ms for
the normal case when the environment map doesn't need to be redrawn.
The code wrongly used return instead of continue. This caused a second
sun to disappear if the bitmap of the first sun wasn't drawn.
This fixes Mantis 3188.
The codebase had quite a few instances of .size() being called and then checked to see if it was 0 or not (or less than 1, or greater-than-or-equal-to 1, which are basically equivalent), when .empty() could be called instead (negated or not, depending on what the original condition was).
The previous code generated a lot of OpenGL function calls because every
star was rendered using a separate NanoVG frame. This fixes that by
using the path renderer directly which removes most of the
inefficiencies.
This is related to #898.
This introduces a new mechanism for handling bit flags. Instead of using an int (or two, or three) to write bits into, this uses the std::bitset in a wrapper class that accepts an enum class as input. This means that certain classes of errors we've had a few of in the engine, where a coder used the wrong set of flags or checked them against the wrong variable (SF_STEALTH vs SIF_STEALTH, for example) can now be detected at a compiler level rather than not at all.
This is a renaming of the Dumb_rotation infrastructure, which is now called Intrinsic_rotation. Intrinsic rotations are automatically applied to submodels without the need for an associated subsystem. Dumb rotations are now a type of intrinsic rotation, and look_at rotations will be added in a future PR. The same code will handle both; the only difference is in how the intrinsic rotation is calculated. (In the case of dumb-rotation, it is calculated the same way as normal rotation; in the case of look-at, it will be calculated using submodel_look_at.)
chief1983