• Frieze Groups
• Wallpaper Groups
• 2D Point-Group Demo (uses inline SVG)
• Organism-Symmetry Demo (uses inline SVG)
• Organism-Symmetry Gallery has lots of pictures showing a variety of symmetries.
• Playing-Card Symmetries
• Dice Symmetries
• Symmetry Explorer, a demo for showing the effects of various symmetries on image files (uses HTML Canvas with pixel access)

The demos depend on various features that only some browsers may have.

If you can see "Inline SVG" in a box below, then your browser supports inlined Scalable Vector Graphics code.

If you can see "HTML Canvas" in a box below, then your browser supports the HTML <canvas> element.

Accessing an image's pixel values is something that different browsers respond differently to. When run off of another server, no browser that I've tried will give access to an image's pixels. So one must save the page and run it off one's local storage. That should not be difficult for my Symmetry Explorer page, since it depends on no other files. Even then, browsers' behavior will vary:

• Continue without warnings: Safari
• Warning dialog box: Firefox states that continuing will give the page the ability to "read private data from any site or window". But you can choose to continue and use the image's pixels.
• Block without warnings: Chrome

Here is a table of what I have discovered for my Symmetry Explorer:

* Inline SVG works in this page, but not in the demo pages.

Security overrides for various browsers:

• Firefox: Go to address about:config then search for security.fileuri.strict_origin_policy Double-click it to set to "false"
• Chrome: start from a command line (Terminal in OSX or Linux) with argument –allow-file-access-from-files

To my science-math index page