OpenGL marks for annotating 3D actors.
A 2D drawing inserted at a 3D position of the scene.
Mark objects have the following methods:
Two viewport axes drawn at a 3D position.
AxesMark objects have the following methods:
A text drawn at a 3D position.
TextMark objects have the following methods:
A list of numbers drawn at 3D positions.
Create a number list.
pos is an (N,3) array of positions. val is an (N,) array of marks to be plot at those positions.
While intended to plot integer numbers, val can be any object that allows index operations for the required length N and allows its items to be formatted as a string.
MarkList objects have the following methods: