Demonstrations

Java programs to download, developed by M. Szilvási-Nagy :

Generalized Polygonal Wankel Engines (by Emil Molnár and Jenő Szirmai)

Crystallographic Groups of the Plane (by István Prok)

Symmetric Polyhedra (by István Prok)

Uniform Polytopes (by István Prok)

Visibility of  4-Dimensional Regular Polytopes (by Emil Molnár and István Prok)