Slippers surface
By Roger Bagula
Graphics by
Paul Bourke
August 2002
x = (2 + cos(u)) cos(v)
^{3}
sin(v)
y = (2 + cos(u+2pi/3)) cos(2pi/3+v)
^{2}
sin(2pi/3+v)
^{2}
z = -(2 + cos(u-2pi/3)) cos(2pi/3-v)
^{2}
sin(2pi/3-v)
^{3}
0 <= u <= 2 pi, 0 <= v <= 2 pi