twodisks

Keyboard controls
Arrow keys: pan
[ ]: zoom
0: return home
Touch controls
One finger: pan
Pinch: zoom
Buttons
n_{1, 2}: change disc1, 2 symmetry
n: change symmetry of both discs
r_{1, 2}: change disc1, 2 size
r : change size of both discs

Full Compound Symmetry Group