"Model Maker" mesh generation algorithm

Operating system: Any
Slicer version: 4.10.2
Expected behavior: The mesh generated using “Model Maker” option, has points or triangles? Which algorithm uses “Model Maker” option?
Actual behavior:

It uses a number of VTK filters. See complete implementation here: https://github.com/Slicer/Slicer/blob/master/Modules/CLI/ModelMaker/ModelMaker.cxx

The mesh generated with “Model Maker” has triangles or only points?

Model maker generates a surface mesh consisting of points and triangle cells.