Head Tracking FPV Gimbal Features

[MedlinDrone]

I have a couple feature requests. I fly with five primary channels, the normal four plus camera tilt/angle of a single axis tilt gimbal (controlled via head tracking, on an auxiliary channel), more info at MedlinDrone.com There are two features that would really help people fly like this, the first is a new OSD option that is the normal "horizon line" but always horizontal and the height on screen controlled via an auxiliary channel, to give the operator a reference to their current camera angle. The second is allowing the current 'smoothing' options to be applied to an auxiliary channel, this is not as important but would be nice. Neither of these are necessary to fly like this, I've been flying with it for almost two years, but these features would really help people learning to fly with 'dynamic camera angle' and be nice even for experienced pilots. When I find time, I will implement this myself, but I'm not sure when that'll be as I work constantly. This is the future of FPV, and these features would really help the progress of it. Happy flying!

[qvasic]

My set of your gimbals is almost two months in delivery, but once it is here I'll see what I can do about it.

Both features aren't that hard to implement.

[MedlinDrone]

Sounds good, hopefully it'll get to you soon. Also, I forgot to mention that the way the 'horizon line' would ideally move is opposite of the servo channel value, so that it essentially acts like the prop line (i.e. look down, the 'horizon line' is raised, look up the 'horizon line' is lowered), hope that makes sense.

Down the line it would also be nice to have the option of having the roll of the 'horizon line' able to be controlled by an axillary channel as well for aiding in flying the dual-axis gimbal, more info on that here: https://medlindrone.com/2021/11/01/dual-axis-fpv-gimbal/

[MedlinDrone]

I have begun implementing this, have the OSD feature I am calling 'Artificial Prop Line' ready for its first unit test.

[MedlinDrone]

Renaming OSD feature to Camera Angle Reference.

The two current forks for this feature are
https://github.com/MedlinDrone/betaflight/tree/Feature-OSD-ArtificialPropLine
https://github.com/MedlinDrone/betaflight-configurator/tree/New-OSD-Feature-Camera-Angle-Reference

[MedlinDrone]

@qvasic Check it out!
#13070
betaflight/betaflight-configurator#3570