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A very alpha version of a JS Library for doing affine transformations and (coming soon) other simple transformations I need for a bigger project. My first node module. Written in IcedCoffeeScript.

Browser Use

<script src="geom2d.js"></script>
 var affine  = require('affine');
 var polygon = require('polygon');
 var rot_left  = new affine.rotation(  Math.PI / 4);
 var rot_right = new affine.rotation( -Math.PI / 4);
 var go_big    = new affine.scaling (  2,   4);
 var go_small  = new affine.scaling (  0.5, 0.25);
 var do_nothing = rot_left.copy();
 var square = polygon.factory.unitSquare();
 document.write("<h3>Square before</h3>");
 document.write("<h3>Square after</h3>");

Node Installation

npm install -g geom2d

Usage (CoffeeScript example)

{affinepolygon} = require 'geom2d'
rot_left  = new affine.rotation  Math.PI / 4
rot_right = new affine.rotation -Math.PI / 4
go_big    = new affine.scaling   2,   4
go_small  = new affine.scaling   0.50.25
# 4 compositions that should net nothing 
# -------------------------------------- 
do_nothing = rot_left.copy()
do_nothing.rightComposeWith rot_right
do_nothing.rightComposeWith go_big
do_nothing.rightComposeWith go_small
square = polygon.factory.unitSquare()
square.transform do_nothing
console.log square


All .js and .json files are auto-generated. Please edit the appropropriate .iced files and run cake build before committing.

geom2d is written in an improved version of CoffeeScript called "IcedCoffeeScript".