Grapher.target

Target module for Grapher.

Given a point in data space, target a node or link, or find the nearest nodes and links to a point.

Files

###grapher.target(point, type)

Returns a node or link index given a point and optionally type.

point: an object containing x and y in data space. ex. {x: 0, y: 1}. You can convert a point from the canvas offset to data space by using grapher.getDataPosition:
```
var point = grapher.getDataPosition(x, y);
var nodeId = grapher.target(point);
```
type (optional): "nodes" or "links", default "nodes".

###grapher.nearest(point, type, options)

Returns an array of the nearest node or link indices given a point, optionally type, and optionally options.

point: an object containing x and y in data space. ex. {x: 0, y: 1}. You can convert a point from the canvas offset to data space by using grapher.getDataPosition:
```
var point = grapher.getDataPosition(x, y);
var nodeId = grapher.nearest(point)[0];
```
type (optional): "nodes" or "links", default "nodes".
options (optional): an object containing d, a distance function, and count.
- d (optional): a distance function used for comparison. Accepts as arguments a point and a node or link.
- count (optional): number of nearest indices to return.

Import target.js after the main grapher script.

<script src="grapher.js"></script>
<script src="target.js"></script>

You can build Grapher with grapher-target using Duo and providing Grapher as the argument:

var Grapher = require('ayasdi/grapher');
require('ayasdi/grapher-target')(Grapher);