Tube

Myrtle creates a 3D space tube ride for her to fly through…

Sometimes Myrtle needs to take a break and have a little fun! One of the things she can do is make a space tube and fly through it, using the TUBE and TUBEARC primitives:

TUBE makes a straight tube, and takes the parameters and . So, tube 20 10 10 makes a tube with a radius of 20 turtle units, a depth of 10 turtle units and 10 sides.