The Boy surface back

This beautiful but strange shape is a Boy surface. It was discovered by Verner Boy in 1902, and for the first time analytically rendered by Jérôme Souriau and Jean-Pierre Petit in 1981. In "Le Topologicon" [Belin, 1988], a popularizing scientific comics, Jean-Pierre Petit gives at the end of the book the equations and the BASIC code to render it in two dimensions. In 1996 I used this code to produce a three dimensionnal object of the Boy's surface. So, here are the pictures rendered and the C sources that I wrote. For all I know, the Boy's surface is the transformation of a Möbius band... SurfaceDeBoy.c Objet3D.h Objet3D.c Fichier.h Fichier.c Constantes.h   1 073 Ko animation