Creates a 3D coordinate axis primitive (X, Y, Z lines) using colored cylinders,
each orthogonally aligned, and adds a center sphere to visualize the origin.
Parameters
length: number
The length of each axis line.
radius: number
The radius of each axis cylinder.
radii: number
The radius of the center sphere.
Returns Primitive
The composite primitive with colored axes and center sphere.
Creates a 3D coordinate axis primitive (X, Y, Z lines) using colored cylinders, each orthogonally aligned, and adds a center sphere to visualize the origin.