Napari: Axes visual enhancements

[sofroniewn]

🚀 Feature

Following the initial adding of an axes visual in #1719 there have been a number of enhancements suggested that we decided to save for follow up PRs.

• [x] Adding text labels to the axes, see https://github.com/napari/napari/pull/1719#issuecomment-707148363 cc @sfcaracciolo

• [ ] Placing the axes in the bottom left corner independent of the position and zoom of the camera, see https://github.com/napari/napari/pull/1719#issuecomment-707200067 cc @Czaki

• [ ] Better handling or "roll" with datasets of dimension > 3, see https://github.com/napari/napari/pull/1719#issuecomment-707491177 cc @GenevieveBuckley

• [ ] Analysis and verification of left handed / right handedness of coordinate system, see https://github.com/napari/napari/pull/1719#pullrequestreview-507991330 cc @jni

More ideas welcome!!

[adamltyson]

Just had a go with #1719, and it looks really good. I agree with others that I would like:

• To be able to add text to labels
• To be able choose the corner that the axes are at (but I would prefer the default to be the origin)

Also, re @jni 's comments, I load a lot of non-symmetrical 3D data into napari, and it always looks fine to me (and consistent with ImageJ etc.).

[jni]

I load a lot of non-symmetrical 3D data into napari, and it always looks fine to me

Awesome, thank you @adamltyson for that comment!

[imagesc-bot]

This issue has been mentioned on Image.sc Forum. There might be relevant details there:

https://forum.image.sc/t/show-axes-reference-in-the-3d-canvas/43578/7