2D/3D rectilinear programmable source examples

Looking for a couple examples for creating 2d & 3d rectilinear data, such as z=f(x,y) and w=f(x,y,z). The only one I’ve found (helix, double helix) doesn’t help. I need to create a dense 2d & 3d rectilinear grid rather than a geometry in 2/3d.

There are some example in the ParaView Guide: