---
title: Finding loose paths
---

You may also wish to find paths that are <b>not</b> part of a chain. This will require you to pass a callback function
which will be passed these three parameters:

<ul>
    <li>chains: an array of chains that were found. (both endless and non-endless)</li>
    <li>loose: an array of paths that did not connect in a chain.</li>
    <li>layer: the layer name containing the above.</li>
</ul>

This function will get called once for each logical layer. Since our example has no layers (logically it's all one "null" layer), our function will only get called once.

{% highlight javascript %}
//combine a rectangle and an oval, add some other paths

var m = require('makerjs');

function example(origin) {
    this.models = {
        rect: new m.models.Rectangle(100, 50),
        oval: m.model.move(new m.models.Oval(100, 50), [50, 25])
    };
    this.origin = origin;
}

var x = new example();

m.model.combineUnion(x.models.rect, x.models.oval);

x.paths = {
    line1: new m.paths.Line([150, 10], [220, 10]),
    line2: new m.paths.Line([220, 50], [220, 10]),
    line3: new m.paths.Line([220, 75], [260, 35]),
    circle: new m.paths.Circle([185, 50], 15)
};

var svg = m.exporter.toSVG(x);

document.write(svg);

//find chains and output the results

m.model.findChains(x, function(chains, loose, layer) {
    document.write('found ' + chains.length + ' chain(s) and ' + loose.length + ' loose path(s) on layer ' + layer);
});

{% endhighlight %}

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