columpius_yellow

Equation

\[ x^3 y+x z^3+y^3 z+z^3+7 z^2+5 z \]

Properties:

  • degree 4
  • smooth
  • two holes
  • unbounded
columpius_matlab
columpius_on_white

Some story

Columpius was not that challenging to decompose. Projection onto x and y again worked well. A sphere of radius 10 appears to match the raytrace on Herwig Hauser's gallery.

columpius_on_black_blocky
columpius_on_white_blocky2
columpius_on_white_blocky
columpius_matlab_screencap

input

projection

sphere