Projective dynamics  ·  convex pentagons

The Pentagram Map

Join each vertex to its second neighbours; the short diagonals cut out a smaller polygon. Iterate forever. A pentagon returns to its own projective class after one step, so the whole tower is powers of a single projective matrix h — no construction is ever repeated.

Labelled class  ·  returns every 5
Periods, in steps
Generator  · 
Run
Order
Seed
Show
Drag a vertex  ·  5 / 6 to switch  ·  space to hold  ·  R to reseed