Auto-zoom out behavior

[alex-w]

One the MacBook Pro M3, with Stellarium v22.3(v1.0) - the planet auto-zoom feature does not appear working correctly.

After selecting the planet, the forward-slash key zooms into the planet.

But when selecting the backslash key - the initial auto-zoom does not "return to the initial FOV and direction of view" (as it says in the manual)

It moves to a different FOV (the horizon is curved and 90-deg wide, not 180-deg); with the forward position of view no longer South, but the direction of the location of the planet.

I've checked the config settings, and they're all the same as my old v19.3.

So I'm not sure if there's something I need to change, or if this is a bug?

Thank you - yet the Auto-direction at zoom out does not solve the problem.

Here is the zoom out before selecting Auto-direction at zoom out

Here is the zoom out after selecting Auto-direction at zoom out

Here is the correct zoom out behaviour, from v19.3

Originally posted by @ImmersiveTheatres in #3535 (comment)

[alex-w]

Probably the issue #2867 related to the "new" behavior too

[alex-w]

@gzotti can be this issue related to your modifications in StelMovementMgr class?

[gzotti]

Maybe. I did some necessary relevant changes in August/September 2022. Version 0.22.1 should therefore not show it (but maybe some other issue). This class is a serious nightmare!

[gzotti]

Given that I don't remember ever having used this function in the past 12 years (probably because the backslash key never worked on German keyboards?): Should the last orientation/FOV combination be remembered at onset of the forward-slash zoom-in and restored at end of the backslash operation? Or what exactly is the operation? Also the translation is insufficient... What should happen if this "zoom out" is pressed again?

[ImmersiveTheatres]

Forward slash:

• first press = zoom in
• second press = zoom in some more

Backward slash:

• first press = zoom out
• second press = zoom out some more (back to night sky view, same orientation as before)

This is how I've always used it, and it's great for teaching!

[gzotti]

Is that presumably "center and zoom"?
And if you zoom in, and then do something else? When will a state of "zoomlevel1" or "zoomlevel2" be forgotten? When you unselect/select something else? When you move the scene (mouse drag or keyboard) and press again? Just re-center to zoomlevel1, or further on to zoomlevel2?

I can see the application in a teaching environment, just am unfamiliar with these operations which is why they got lost for the sake of other improvements. As said, this part is really super convoluted.

[ImmersiveTheatres]

I think most teachers will use this functionality in a simple way like I do ie. zoom in, discuss, zoom in more, discuss, zoom out, zoom out more.

I don't move the mouse / scene or do anything else while zoomed in.

Occasionally at zoomlevel1 if I'm at say Jupiter, I zoom in to one or two of the moons. Then zooming out we're back at Jupiter (re-centred).

It works best if centred / re-centred is the default for zooming / un-zooming.