Add "follow camera direction" orientation mode to vtkGlyph3D
A new glyph orientation mode is added to vtkGlyph3D: "follow camera direction". This allows using simple 2D shapes as glyphs, which is easier to create and much more efficient to render, as they use much less points as 3D shapes. When used with 3D shapes, the shapes appear in a fixed orientation with respect to display coordinate system.
This feature has been requested multiple times over the years, such as: