Formation of isotropic triangular lattice on a cone frustum with a couple of initial columns (masked with white noise).

The cone is mapped to a flat plane here. The inner boundary (closest to origin) and the outer boundary (farthest from origin) are no-flux boundaries. The remaining two boundaries are periodic. There are two hundred initial rows. Note that the dimensions of this simulation domain are different than that of S2 Video (because this lattice has isotropic UV spacing, not anisotropic UV spacing). (ZIP)