Circular Text or Emojis Primer Tutorial

Circular Text or Emojis Primer Tutorial

We’ve got a “proof of concept” tutorial for you today, because we got put onto an idea for something by How to Make Circular/Curved Text with JavaScript, thanks. We wanted to extend the logic of that …

• ascii codes (of characters) less than 256, text handling … to, now, be able to handle …
• emoji data (or that’s what we like to “nickname” it … sorry if this annoys, but it really concerns UTF-8 characters really

We resisted the Sushi Train Circuit Game Tutorial ideas, because it isn’t lunchtime, and opted to allow the user to enter their own text (including any emojis (available via Command-Control-Space menu here at Mac OS X) or via &#[CodePoint]; HTML Entity (decimal or hexidecimal (CodePoint)) entries (where we’d like you to put & rather than just & if you are going to do this, and if you want to do this, but need tips on how you might approach this, please consult our previous Karaoke via YouTube API in Iframe Emoji Tutorial where we often start at good ol’ emojipedia).

Maybe there will be some sequels, but for the meantime you can examine the HTML and Javascript circular_text.html code (including more thank you links), that you can try for yourself at this live run link.

With that in mind, take a look at us creeping through the text characters you enter, and notice how an emoji will have two bytes in a row with ascii code greater than 255 …


var etxt=intxt.replace(/\&amp\;/g,'&').replace(/\;\&\#/g,',').split('&#'); // intxt is your text
var txt=[], zero=0; // changed elsewhere as well

var one=1;
for (kk=zero; kk<etxt[k].length; kk+=one) {
if (etxt[k].substring(kk, eval(1 + kk)).charCodeAt(0) > 255) { // emoji found
txt.push(String.fromCodePoint(eval('' + etxt[k].substring(kk).charCodeAt(0)),eval('' + etxt[k].substring(kk).substring(1).charCodeAt(0)) ));
one=2;
} else { // normal ascii text
txt.push(etxt[k].substring(kk, eval(1 + kk)));
one=1;
}
}
}
one=1;
zero=0;


You can also see this play out at WordPress 4.1.1’s Circular Text or Emojis Primer Tutorial.

If this was interesting you may be interested in this too.