Wallpaper groups

Hi Mountain Viewers

As you can see from the gallery and wiki, I have figured out the transformations for the 17 planar wallpaper groups. Many are just the new CF3 built-ins plus rectangular or skewed tiling, but some needed to be hand-coded. If you want to build any of these into a future CF release alongside the frieze groups and point groups, feel free.

Yes, you are right. For some reason I didn't think it made sense as a feature. But it really does. You should be able to do it with the roll-your-own symmetry feature. But there should be all 17 named wallpaper groups just like there are the named frieze groups.