Shap3d02.dat, 2nd 'shape' file for CPO3D
A cylinder of elliptical cross section created by stretching transversely
A cylinder is set up and the 'stretching' option is used to increase all x coordinates by a factor of 2, producing an elliptical cross section.
Note that the x=y plane of reflection symmetry is not used because the stretching is neither perpendicular nor parallel to this plane.
The equation for the section of the cylinder is
(x/a)**2 + (y/b)**2 = 1,
where a = b = 1 is the radius of the circular section. After stretching the x coordinates by a factor of 2 the value of a is effectively increased by this factor, producing an elliptical section.