Add camera perspective projection mode for advanced import

[paddy-exe]

This PR adds the possibility to switch between the perspective and orthographic camera projection modes. It also adds a setting in Editor/Import with Perspective being the default.

Closes godotengine/godot-proposals#6692

Showcase

Godot-PerspectiveCameraView-720p.mov

[fire]

In the middle of review but wanted to mention this is a good proposal.

[coppolaemilio]

I feel like you should be able to change the view from the popup itself. Having to close it and going to the settings for it to change it feels like it will result in the feature having 0 discoverability and ease of use.

[lyuma]

The Advanced Import dialog already has a toolbar which is mostly blank. I think we should start by using that toolbar space to expose things like switching perspective

See this PR by @reduz for an example:
#86430

[paddy-exe]

Thank you both👍🏻 yeah this makes sense. I will update the PR accordingly.

[paddy-exe]

I updated the code to be able to change the projection inside the camera view now. Here a video showcase:

Bildschirmaufnahme.2024-05-26.um.01.10.39.mov

I would appreciate any feedback about the location of the button / if it should have an icon at all. With this implementation it would need two icons for both camera projection methods.

To Note:

• I just used the Camera3D and CameraAttributesPhysical icon to be able to showcase the changes. These are meant only as placeholders for the final icons.

[fire]

PatrickFlameLizard what are your thoughts on having two two-state toggles. We had the discussion about not using triple state toggles for the lights a few years ago. You can see in the video.

[lyuma]

@fire I don't think the video shows any triple state toggle: the camera always exists, so it is just a single boolean toggle: either ortho or perspective

as far as UI, rather than a single button, we should aim to have the same menu as in the 3D scene view: Left/top/forward/bottom/etc, perspective/orthographic.

See here for the menu layout I am talking about
https://docs.godotengine.org/en/stable/tutorials/3d/introduction_to_3d.html#view-menu

I don't expect one PR to necessarily add all these features, but perhaps if it is its own function maybe it would be easier/ better to copy the way the 3D view does things.

[paddy-exe]

@lyuma This sounds like a good idea👍🏻 that way it's already the same UX for the user. I will get on it

[Calinou]

@paddy-exe Bump 🙂 Have you been able to look into updating the PR according to lyuma's feedback recently?

[paddy-exe]

@paddy-exe Bump 🙂 Have you been able to look into updating the PR according to lyuma's feedback recently?

I have and I encountered a few bumps that I will need to resolve. They mostly stem from me not being familiar with that part of the codebase. I will be attending GodotCon and afterwards try to get back to it to get it in a mergeable state.