Sphere with hidden-line removal.
This script draws a projection of a 3D sphere with longitude and latitude lines.
It applies hidden-line removal.
The sphere is rotated around the x axis for viewing.
The script uses two functions which extend the functionality of the kandinsky module.
connect draws a line between two arbitrary points
connect(x1,y1,x2,y2,co="black")
circle draws a circle using the Minsky algorithm
circle(xc,yc,r,co="black")