rotation module generates a solid body by rotating a plane curve around an axis that lies on the same plane, as shown in the right figure. The axis is defined by coordinates at two spatial points such as (x0,y0,z0) and (xend,yend,zend). The plane curve to be rotated is defined by coordinates in a 2D plane such as points 1 through 7 on the bottom right of the right figure.  The output of rotation module are level sets representing the generated 3D solid body. Cylinder and cone are two typical examples.