Transfer function visuals

[talonchandler]

This PR adds visualization scripts for the Green's tensor spectrum and transfer functions.

Tagging @mattersoflight, @edyoshikun, @ieivanov who have requested these.

Running these scripts results in:

Screen.Recording.2024-11-08.at.1.33.04.PM.mov

Screen.Recording.2024-11-08.at.2.01.11.PM.mov

[mattersoflight]

Hi @talonchandler, these scripts work well! I tested on Mac.

Surface rendering of the support of the Green's tensor spectrum just like you surface render support of OTFs will lead to a more intuitive and compelling visualization.

Minor point: For visualization and slides, the dark theme looks better to me.

[talonchandler]

Surface rendering of the support of the Green's tensor spectrum just like you surface render support of OTFs will lead to a more intuitive and compelling visualization.

I agree, I will iterate here. The aliasing and colormapping are making the volume renders suboptimal. I'll need to get a "marching cubes" or similar algorithm connected to napari's surface layer, but I don't expect an enormous lift.

Minor point: For visualization and slides, the dark theme looks better to me.

Sounds good, I can return to that default after changing to a surface rendered Green's.