Show HN: Art – draw one stroke, let symmetry complete it

"Mirror" mode was my favorite feature on the Koala Pad app back in the 1980s.

The actual drawing experience is really satisfying. A couple usability tweaks I did just fiddling in the DOM: - Put the output and inputs side by side - Put the "actions", export, clear, etc. pinned to the bottom - The overall goal being zero scrolling

After that it was quite fun and I enjoyed the options you gave for things like brush size, metallics, gradients, etc. Nice!

When I scroll down to select a different color for my next stroke, the canvas often resets.

Edit: or rather undoes the last stroke (which looks like resetting when it goes from 1 to 0).

Cool!

I made a similar thing for my kids (they wanted something similar to the kaleidoscopic drawing you can do in some ‘Monument Valley’ levels

https://mirror-it.staticdomains.app/index.html

Ha! I added a similar feature to Open Brush: https://docs.openbrush.app/user-guide/multimirror

And learned a bit about group theory in the process... :-/

( https://github.com/IxxyXR/unity-symmetry )

Cool! I got a weird feeling when playing with it, it's just something very satisfying in seeing it be completed

fwiw Krita has a similar setting in its brush tool - you draw a stroke and said brush stroke is mirrored by a given x axis or a given y axis (or both)

Now we just need the mobile app