Reflex Sight for TrackIR

Fix the ship gunsights to be projected for correct targeting and docking when using positional headtracking such as TrackIR.  The central crosshair will always appear over your forward-facing targeting point even when you move your head around, similar to a real aircraft HUD.

Tested against 9. 00

!!! NEW FOR X4 7. 5: YOU MUST DISABLE PROTECTED UI MODE FOR THIS MOD TO FUNCTION !!!

NEW Q: Why doesn't the mod work with Beta/RC versions of X4?

A: The game version needs to exactly match the version of the mod, otherwise this file will likely overwrite any new changes egosoft adds to the cockpit UI and break all sorts of things. My policy is that this mod will only be updated for official full-release versions of X4. If you are testing an X4 beta branch, I recommend to disable this mod until the full release and the updated version here.

NEW Q: What's all this about Protected UI Mode? Sounds scary!

A: Egosoft has added a new warning to the 7. 5 Extensions system when enabling mods that affect ui lua files (as this one does). For this mod to work you will need to disable that warning/allow this mod. If you are not comfortable with that, I recommend uninstalling this mod and asking Egosoft to add this mod's feature to their base game instead! Please!

Q: What even is a reflex sight and why do I want one?

A: https://en.wikipedia.org/wiki/Reflector_sight

Q: Does this affect any aiming mechanics?

A: No; the trajectory of shots is unchanged.  Only difference is the central crosshair will visually appear be in the correct place when you move your head.

Q: I have aim-assist on and the shots aren't going to the crosshair!

A:  The central crosshair is only intended to show the direction the ship's nose is facing (which is also where unassisted weapons will fire).  Under aim-assist, your shots will converge on the small blue Weapon Impact Indicator pips (which always did work correctly with TrackIR)

Q: Can I incorporate this into my own mod?

A: Yes; please do!  Since this is a Core-File mod it doesn't work very well with other mods that touch the same files so you would have to redo the work anyway.  I encourage you to extract the lua file changes from this mod and use the same approach in any mod of your own (some sort of VR support mod for example).

/!\ This mod will not provide much benefit if you are not using positional head tracking hardware! (Technically there's a tiny noticeable improvement even without head-tracking when using the sideways strafe commands that move the pilot's virtual head a bit)

/!\ As this mod replaces Core Files, it may not be compatible with other crosshair or HUD mods that affect the same files.