View cube

view_cube! adds a small CAD-style cube to a corner of an LScene. The cube rotates with the camera and shows the current orientation of the scene. A left click on a face, an edge or a corner of the cube moves the camera to the corresponding standard view in a short animation, while the point the camera looks at and its distance are kept. The region under the cursor is highlighted.

using BeamletOptics, BeamletOpticsGUI, GLMakie

fig = Figure()
ax = LScene(fig[1, 1])
render!(ax, system)
cube = view_cube!(ax; size = 110, corner = :top_right)
display(fig)

The camera is placed on the side of the clicked face and looks at the system from there:

Face	Camera at	Up
`Top`	`+z`	`+y`
`Bottom`	`-z`	`+y`
`Front`	`-y`	`+z`
`Back`	`+y`	`+z`
`Right`	`+x`	`+z`
`Left`	`-x`	`+z`

The 12 edges and 8 corners give the diagonal views between the adjacent faces, e.g. the corner between Top, Front and Right looks from (1, -1, 1), with +z as the up direction. The transition takes duration = 0.3 s, duration = 0 switches the view instantly. The cube is not affected by zooming or by clip planes. Call close(cube) to remove it. The live view shows a view cube by default, which is disabled via live_view(system, beam; view_cube = false).