Carl Olsen unstoppablecarl
timyates
/ rdp.coffee
Created
June 8, 2012 11:03
— forked from rhyolight/rdp.js
Ramer-Douglas-Peucker line filtering algorithm in JavaScript
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| findPerpendicularDistance = ( point, line ) -> | |
| [pointX,pointY] = point[0..1] | |
| lineStart = x: line[0][0], y: line[0][1] | |
| lineEnd = x: line[1][0], y: line[1][1] | |
| slope = ( lineEnd.y - lineStart.y ) / ( lineEnd.x - lineStart.x ) | |
| intercept = lineStart.y - ( slope * lineStart.x ) | |
| Math.abs( slope * pointX - pointY + intercept ) / Math.sqrt( Math.pow( slope, 2) + 1) | |
| douglasPeucker = ( points, epsilon ) -> | |
| maxIndex = maxDistance = 0 |
paulirish
/ data-markdown.user.js
Last active
October 22, 2024 14:19
*[data-markdown] - use markdown, sometimes, in your HTML
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| // ==UserScript== | |
| // @name Use Markdown, sometimes, in your HTML. | |
| // @author Paul Irish <http://paulirish.com/> | |
| // @link http://git.io/data-markdown | |
| // @match * | |
| // ==/UserScript== | |
| // If you're not using this as a userscript just delete from this line up. It's cool, homey. |
isaacs
/ node-and-npm-in-30-seconds.sh
Last active
April 14, 2025 11:07
Use one of these techniques to install node and npm without having to sudo. Discussed in more detail at http://joyeur.com/2010/12/10/installing-node-and-npm/ Note: npm >=0.3 is *safer* when using sudo.
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| echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc | |
| . ~/.bashrc | |
| mkdir ~/local | |
| mkdir ~/node-latest-install | |
| cd ~/node-latest-install | |
| curl http://nodejs.org/dist/node-latest.tar.gz | tar xz --strip-components=1 | |
| ./configure --prefix=~/local | |
| make install # ok, fine, this step probably takes more than 30 seconds... | |
| curl https://www.npmjs.org/install.sh | sh |
banksean
/ perlin-noise-classical.js
Created
February 15, 2010 10:00
two Perlin noise generators in javascript. The simplex version is about 10% faster (in Chrome at least, haven't tried other browsers)
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| // Ported from Stefan Gustavson's java implementation | |
| // http://staffwww.itn.liu.se/~stegu/simplexnoise/simplexnoise.pdf | |
| // Read Stefan's excellent paper for details on how this code works. | |
| // | |
| // Sean McCullough [email protected] | |
| /** | |
| * You can pass in a random number generator object if you like. | |
| * It is assumed to have a random() method. | |
| */ |
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