Tube
A straight hollow pipe, with adjustable wall thickness.

The Tube is a hollow cylinder, with an outer wall, an inner wall and two rings closing it at the top and at the bottom. It is the primitive for pipes, rings, hoops and round frames.
Properties
- Outer Radius: Radius measured from the center to the outer face, in meters.
- Thickness: Thickness of the wall. The inner radius is the outer one minus the thickness, so a thickness close to the radius closes the hole.
- Height: Length of the tube on the Y axis.
- Radial Seg.: Number of sides of the two walls. Each segment costs twice as much as one of a cylinder, because there are two surfaces and two closing rings.