About this 3D model

These shapes are constructed as ruled surfaces. The base is elliptical and the top is a lissajous curve http://en.wikipedia.org/wiki/Lissajous_curve A=B=1,Theta =120 makes a hyperboloidA=1,B=2,Theta=0 makes a two hole vase, one shallow, one deepA=1,B=3,Theta=0 makes a three hole vase, two shallow, one deep