(Literally) Drawing the HTML 5 Logo in Canvas with Javascript (opens in new tab)

(richwchan.com)

47 pointsrichchan15y ago13 comments

13 comments

I don't understand why people are impressed by HTML Canvas demos. It's like getting impressed by a calculator adding two numbers together. Or being impressed by a for loop statement in a language. Or being impressed by an fopen statement to read files.

A collection of drawRect, drawCircle and setBrushColor calls isn't impressive just because it's done in JS. That's what graphics libraries are supposed to do. Maybe I'm missing something here...

brehaut15y ago

You have (understandably) been led astray by a poorly considered title.

The article demonstrates a vector based 'hand drawing' algorithm that happens to use the HTML5 logo and be implemented in javascript with canvas.

Unfortunately it doesn't appear to implement a generalised library for scruffy drawing.

chaosmachine15y ago

Click the redraw button a bunch of times while it's still drawing for an interesting effect.

richchanOP15y ago

Yep.. Apparently calling jquery ui's disable method doesn't disable the handler -- guess I should've read the docs...

Anyway, thanks for pointing it out. I will try to fix it when I get home. Before then, have fun with the "interesting effects". =)

olalonde15y ago

How did you generate the "var levelX" arrays?

1 more reply

ttol15y ago

Increasing the sloppiness makes this way cooler. +1

ImJasonH15y ago

I like upping the sloppiness on layers 2 and 4 to make a sort of "Two-Face" logo: http://imgur.com/z1iSH

guynamedloren15y ago

Increasing sloppiness on one half + hitting redraw a bunch makes the coolest: http://i.imgur.com/60dEI.png

holdenk15y ago

Semi-related: Whats a good fall-back for when webgl isn't directly supported in the browser?

smackfu15y ago

Cool, but needs a cancel button that stops drawing and re-enables the sliders.

richchanOP15y ago

Done! As a bonus, you can now dynamically change the parameters while it is drawing.

notJim15y ago

This is hacker news, shouldn't they be evolving the shape, instead of just straight drawing it? Also, it should be powered by node.js somehow, and have $3 million in seed funding.

j / k navigate · click thread line to collapse

13 comments

jinushaun15y ago

A collection of drawRect, drawCircle and setBrushColor calls isn't impressive just because it's done in JS. That's what graphics libraries are supposed to do. Maybe I'm missing something here...

brehaut15y ago

You have (understandably) been led astray by a poorly considered title.

The article demonstrates a vector based 'hand drawing' algorithm that happens to use the HTML5 logo and be implemented in javascript with canvas.

Unfortunately it doesn't appear to implement a generalised library for scruffy drawing.

chaosmachine15y ago

Click the redraw button a bunch of times while it's still drawing for an interesting effect.

richchanOP15y ago

Yep.. Apparently calling jquery ui's disable method doesn't disable the handler -- guess I should've read the docs...

Anyway, thanks for pointing it out. I will try to fix it when I get home. Before then, have fun with the "interesting effects". =)

olalonde15y ago

How did you generate the "var levelX" arrays?

1 more reply

ttol15y ago

Increasing the sloppiness makes this way cooler. +1

ImJasonH15y ago

I like upping the sloppiness on layers 2 and 4 to make a sort of "Two-Face" logo: http://imgur.com/z1iSH

guynamedloren15y ago

Increasing sloppiness on one half + hitting redraw a bunch makes the coolest: http://i.imgur.com/60dEI.png

holdenk15y ago

Semi-related: Whats a good fall-back for when webgl isn't directly supported in the browser?

smackfu15y ago

Cool, but needs a cancel button that stops drawing and re-enables the sliders.

richchanOP15y ago

Done! As a bonus, you can now dynamically change the parameters while it is drawing.

notJim15y ago

This is hacker news, shouldn't they be evolving the shape, instead of just straight drawing it? Also, it should be powered by node.js somehow, and have $3 million in seed funding.

j / k navigate · click thread line to collapse