This can be generalized to scalar and vector fields in any number of dimensions. These things are everywhere in generative art. The discretization done by the a

This can be generalized to scalar and vector fields in any number of dimensions. These things are everywhere in generative art. The discretization done by the author here is often not necessary, though. The graphical programming environment vvvv has a pack of nodes ("field trip") for manipulating these in 2D and 3D. Fun to play with, and it's been used to create many beautiful pieces.