Awesome
Bin Pack
A packing algorithm for 2D bin packing. Largely based on code and a blog post by Jake Gordon.
This library packs objects that have a width and a height into as small of a square as possible, using a binary tree bin packing algorithm. After packing, each object is given an (x, y) coordinate of where it would be optimally packed.
The algorithm may not find the optimal bin packing, but it should do pretty will for things like sprite maps.
Installation
npm install bin-pack
Use
var pack = require('bin-pack');
var bins = [
{ width: 10, height: 20 },
{ width: 100, height: 100 },
{ width: 50, height: 19 },
...
];
var result = pack(bins);
// result.width: width of the containing box
// result.height: height of the containing box
// result.items: packed items
// result.items[0].x: x coordinate of the packed box
// result.items[0].y: y coordinate of the packed box
// result.items[0].width: width of the packed box
// result.items[0].height: height of the packed box
// result.items[0].item: original object that was passed in
If your object doesn't have x
and y
properties, and you don't mind a
library writing to your objects, then specify inPlace: true
and your objects
will have a x
and y
properties added to them.
var pack = require('bin-pack');
var bins = [
{ width: 10, height: 20 },
{ width: 100, height: 100 },
{ width: 50, height: 19 },
...
];
var result = pack(bins, { inPlace: true });
// result.width: width of the containing box
// result.height: height of the containing box
// bins[0].x: x coordinate of the packed box
// bins[0].y: y coordinate of the packed box
Contributing
Contributing tests, documentation, or code is all appreciated. All code should be accompanied by valid tests.