[vicapow]

that's so cool! btw, you can link to your equation here

    http://vicapow.github.io/equation-plot-webgl/index.html#0.5%2Bsqrt(0.2-((x-0.5)%5E2%2B(y-0.5)%5E2))

edit: but HN seems to be messing up the urls :(