Double-click to focus on a point no longer works

[bchretien]

Describe the bug

Double-clicking on a 3D point of a point cloud to refocus the camera no longer works.

• Version 0.12.1: it works ✅ (https://app.rerun.io/version/0.12.1)
• Version 0.13.0: it doesn't work ⛔ (https://app.rerun.io/version/0.13.0)
• Version 0.14.1: still doesn't work ⛔ (https://app.rerun.io/version/0.14.1)

To Reproduce
Steps to reproduce the behavior:

1. Go to an official example with a 3D point cloud (e.g. Structure from Motion)
2. Double-click on a 3D point on the side of the scene
3. The focus is made on the center of the 3D point cloud as a whole, not the individual point as before

Expected behavior

Up until v0.12.1, we could focus specific points of a 3D point cloud easily, and this is no longer the case.

Screenshots

N/A

Backtrace

N/A

Desktop (please complete the following information):

• OS: macOS Monterey 14.3.1
• Browser: Firefox Version 123.0 (64-bit)

Rerun version

Versions 0.13.0 to 0.14.1

Additional context

N/A

[Wumpf]

This was broken more or less intentionally. Starting in 0.13 double clicking an entity focuses the entity as a whole, no matter where you double click it. For this new focus action we're using the current local bounding box of that entity and move the camera accordingly. The previous double click in contrast was about a 3D position and would place the camera with some heuristic based on the current scene size.
Given that I have a bit of a hard time on how to bring instance path focus back: clicking twice on an entity selects the entire entity which is why the focus action goes to the entity, and unlike for entitites we don't have a local bounding box for instances.
One idea would be to put the "focus on 3d position" action into a context menu, but I figure this might be quite unwieldy. What do you think?

[bchretien]

@Wumpf I see, our use case involves dealing with large point clouds and we often have to zoom in on very specific points. I don't know what's the most user-friendly way to have this feature back. The double click to focus on a specific 3D point feels natural and common in lots of 3D viewers.

Could it be some kind of "focus mode" defined for each entity, that we could set automatically in a blueprint? That way the default behavior remains the one from v0.13.0, but we can easily go back to the old approach when needed for specific entities.

[Wumpf]

Not thrilled by adding a mode setting for it, especially not per-entity. But I get that this can be quite important for your usecase so we'll have to come up with something 🤔

[bchretien]

@Wumpf: yes, the extra mode would complexify the code and testing... Feel free to ping me if you need some feedback on potential solutions :) And thanks for the quick answer!