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poly-decomp
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Library for decomposing 2D polygons into convex regions.
The library is a manual port of the C++ library Poly Decomp by Mark Bayazit.
It implements two algorithms, one optimal (but slow) and one less optimal (but fast).
// Create a concave polygon
var concave = new decomp.Polygon();
concave.vertices.push([ -1, 1],
[ -1, 0],
[ 1, 0],
[ 1, 1],
[0.5, 0.5]);
// Decompose into convex polygons, using the faster algorithm
var convexes1 = concave.quickDecomp();
// Decompose using the slow (but optimal) algorithm
var convexes2 = concave.decomp();
// convexes1 and convexes2 are now arrays of Polygon objects.
Download decomp.js and include the script in your HTML:
<script src="decomp.js" type="text/javascript"></script>
Until the code gets somewhat more stable, use the git url to install:
npm install git://github.com/schteppe/poly-decomp.js
Or add the dependency to your package.json
:
...
"dependencies" : {
"poly-decomp" : "git://github.com/schteppe/poly-decomp.js"
}
...
Then require it like so:
var decomp = require('poly-decomp');
Polygon.prototype.removeCollinearPoints
.thresholdAngle
to Point.collinear(a,b,c,thresholdAngle)
.Make sure you have git, Node.js, NPM and grunt installed.
git clone https://github.com/schteppe/poly-decomp.js.git; # Clone the repo
cd poly-decomp.js;
npm install; # Install dependencies
# (make changes to source)
grunt; # Builds build/decomp.js
The most recent commits are currently pushed to the master
branch. Thanks for contributing!
FAQs
Unknown package
We found that poly-decomp demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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