* Update `$POF file Techroom:` Usage
Currently `$POF file Techroom:` is only used in the weapons loadout screen (despite having techroom in the name). This PR expands the use of the `$POF file Techroom:` to shiploadout select and the actual techroom.
If it is desired I can put it behind a game settings flag, but IMO it would make the most sense for modders to have this just work as the actual name implies.
* clean up code with feedback
* typo fix in comment
Floating-point comparisons are tricky beasts. See this article for a good summary of the issues involved:
https://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/
This PR improves support somewhat, although there are obviously situations in the code (such as comparisons to 0) that should still be addressed. This PR makes the following improvements:
1) Tightens the threshold on `IS_VEC_NULL` and `IS_VEC_NULL_SQ_SAFE` from 1e-16 and 1e-36 to FLT_EPSILON
2) Tightens the threshold for parsing `turn_time` in POFs
3) Restores the previous implementation of `fl_equal`
4) Adds a dedicated `IS_MOI_VEC_NULL` for moment of inertia values
5) Improves documentation
Follow-up to #4535 and #4443.
As part of the cleanup in preparation for model translation, there was a bit of code review that was actually incorrect. The calculation of the current step needs to be rounded down, because the step isn't actually complete until it fully reaches the next number. Rounding the step causes the submodel to jump around in all sorts of weird ways.
Follow-up to #4443.
* Add Animation Instance Flags
* Add SEXP barebones
* Unify and simplify animation parsing
* Clean up animation calling and use new animationlist api
* Add missing break
In #4443, `fl_near_zero` was set to use default epsilon values in the `IS_VEC_NULL` check. In this comparison, epsilon is the wrong threshold because it used to have a much smaller threshold. The fix restores the previous definitions of `IS_VEC_NULL` and `IS_VEC_NULL_SQ_SAFE` by exposing the epsilon value as an optional parameter (similar to how `IS_NEAR_ZERO` used to work. This PR also restores `IS_VEC_NULL_SQ_SAFE` where it was replaced by `IS_VEC_NULL.`
* more cleanup in preparation for model translation
1) Clean up stepped rotation, fixing some logic, adding safeguards for invalid values, and allowing rotations to go in the opposite direction
2) Add more specific SEXP error checking for AWACS and rotating subsystems
3) Assorted refactoring and polishing
* address feedback, plus a bit of extra cleanup
Fixed environment map rendering
shift fresnel term to match ordering of ComputeGGX, document shader code.
Envmaps: Use tangentMatrix to build local coordinate system
Fixed geometry self-shading calcs to improve shading of rough surfaces.
Cite paper correctly
optimsed env sampling
Put envmap face generation a loop to make it easier to read
Precalculate points on circle for even faster envmap sampling..
Guard against NaNs
Revert to simpler envmap calcs, significantly faster on slower GPUs.
typo
We don't need the sample points any more.
Diffuse IBL shading
Fix gamma issues in envmap rendering
AO term on envmaps.
fix lab crash with retail data
Always render envmaps - PBR shouldn't care if a shine/specmap exists.
Since "No subsystems found" and "Not all subsystems have a record in ships.tbl" are different warnings, they should have different flags. Follow-up to #4408.
* Add Subsystem Flag to Hide Turrets from Ship Loadout Stats
The statistics summary window in the ship loadout editor shows various aspects and stats of the selected ship. These can be toggled and customized through the ships table, but one line is actually autogenerated, `+Turrets`. This is unideal for certain ships, especially those which use turrets on ships in non-standard ways (for example having an AI controlled turret which shoots bombs). In these cases, the turrets are not actual turrets, and it is confusing for players seeing that there is a turret on the ship in the loadout editor. (I can give more detailed examples using FotG if needed).
This PR adds a subsystem flag which allows the modders to hide a turret subsystem so it is not counted in the auto generation of the `Turrets` summary line. (As a slight cleanup I also removed cleaned up the whitespace formatting on a nearby, but unrelated line).
* sync names
* fix renaming
Goober5000