View position - Githubissues

NikolaiVChr / flightgear-saab-ja-37-viggen

Saab 37 Viggen for Flightgear flight simulator

http://wiki.flightgear.org/Saab_37_Viggen

GNU General Public License v2.0

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View position #158

Closed colingeniet closed 3 years ago

colingeniet commented 3 years ago

[ ] The shake effect / seat position script constantly writes to sim/current-view/y-offset-m. This is a problem if anything else (e.g. headtracking) tries to do the same simultaneously. I think we should avoid such code in an aircraft.
- [x] Seat position can be easily rewritten without this (only write to y-offset-m when actually changing seat position).
- [ ] Shake effect is harder. ~~I need to look at the new generic shaking in 2020.4.~~ It won't do, it is designed for ground roll wobbling, not buffeting.
[x] I think the default view position should be moved a bit backward (~10-20cm), with lower FOV (~80°). The problem would be HUD visibility at high AoA.

NikolaiVChr commented 3 years ago

I found it hard to find a good compromise on how to set the view. The reason I placed it so close was to get the HUD to fill up more of the view, in real life the brain can sorta focus on a part of where the eyes are looking, while on a monitor if its small it can get hard to focus and read the HUD. The reason the view was so wide was to have MI, TI and HUD all in the default view without having to move it, as most people do not have head-tracker.

colingeniet commented 3 years ago

The reason I placed it so close was to get the HUD to fill up more of the view, in real life the brain can sorta focus on a part of where the eyes are looking, while on a monitor if its small it can get hard to focus and read the HUD.

As far as HUD readability goes, it can only get better with lower FOV. I guess the issue is how much of the HUD picture is visible. I understand that what is displayed right now is less than what the two eyes combined would see. On the other hand what is displayed is definitively more than what a single eye would see.

The reason the view was so wide was to have MI, TI and HUD all in the default view without having to move it, as most people do not have head-tracker.

All the screens are still visible in the default view (with 16:9 ratio).

NikolaiVChr commented 3 years ago

All the screens are still visible in the default view (with 16:9 ratio).

Nice

NikolaiVChr commented 3 years ago

Oh, I now rembered another reason I moved it so front. To have better view down the nose so could see the touchdown point when landing with higher AoA. If I moved the eye back then I had to raise it to see which was a no no, since I then no longer had the HUD bore cross in the HUD.

colingeniet commented 3 years ago

Regarding the head shaking issue, I think it is best to add an option to disable it (like the MiG-21).

colingeniet commented 3 years ago

Added an option to disable head shaking. Improved the seat movement code, so that it can work with this option enabled or not.