[Doc]: Create diagram to show rotation directions for 3D plots

[scottshambaugh]

Documentation Link

No response

Problem

PR #21426 adds a "roll" angle to viewing 3D plots for v3.6.0. We need a picture like the one below (which comes from here) to communicate to users what the viewing angles are.

Compared to the picture below, we call that angle "roll" rather than twist. Note also the arrows show the movement of the axes, not the camera. This is the same rotation convention that pyvista uses.

We should probably also have an image showing the movement of the camera, not the axes.

This isn't my strong suit so I'll leave it for someone else to complete.

Suggested improvement

No response

Matplotlib Version

3.5.0.dev2389+g8ad61bdacd

Matplotlib documentation version

3.4.3

[scottshambaugh]

As a bonus, would be good to show the u, v, w view axes as added in #23449

They're defined like the axes in this image from this page, where x, y, z in this image map directly to u, v, w.

[scottshambaugh]

As another bonus, the "unfolded" 3D plot from here would be good to include. This all should probably be a full standalone page of documentation.

[scottshambaugh]

Took at stab at this today: