Shap2d01.dat, 1st 'shape' file for CPO2D
An ellipsoid created by stretching a sphere
A circle of radius 1 is stretched by a factor of 3 in the z direction, producing an ellipse. This shape then produces an ellipsoid after rotation about the z axis.
The equation for the circle is
(rho/a)**2 + (z/b)**2 = 1,
where a = b = 1 is the radius of the circle. After stretching the z coordinates by a factor of 3 the value of b is effectively increased by this factor, producing an ellipse.
The users equations option can of course also be used.