axis of revolution

Cylindricity - describes a condition of a surface of revolution in which all points of a surface are equidistant from a common axis.

The animation programs of the making revolution surface is compiled, and a general coordinate formula of geometric transformation is deduced about an arbitrary revolution curve around a rotation axis.

The unified formula results from the revolution and translational movement of the coordinate axis. Apart from the unified calculating formula, the idea for calculation is clear and distinct.