Re: [Inkscape-devel] Cloned Tiles interface rework proposal

On Tue, 2010-08-31 at 12:32 +0200, J.B.C.Engelen@...1578... wrote:

Just to get the math right (from what I understand of it).

• For P1, the skew is essential, because P1 does not allow rotation symmetries, nor (glide) reflections.

When you make it a square, it becomes a member of p4m. (note that square or rectangle makes a difference)

I don't understand how P1 with a square becomes a member of P4M at all.

The following only fill the plane with square prototypes: P4, P4G. Not sure if I should make the others non-square because of that.

• I think for P2, the skew is not essential, but I am not sure.
• The drawing for PG is wrong, it should not have rotation symmetry.
• The drawing for PMM is wrong, the bottom two squares should be upside down.

Fixed those, thank you! http://thorwil.files.wordpress.com/2010/08/wallpaper_groups1.png