Zoom Plugin

The zoom plugin allows for modifying the planet's projection's scale with the mouse wheel.

API

planetaryjs.plugins.zoom([config])

Valid keys for config are:

initialScale: the value to initialize the d3.behavior.zoom object's scale to; defaults to the scale of the planet's projection at the time the planet is initialized
scaleExtent: the value to use for the d3.behavior.zoom object's scaleExtent property, which defines how far in and out the planet can be zoomed; defaults to [50, 2000]
onZoom, onZoomStart, onZoomEnd: hooks to the d3.behavior.zoom object's zoom, zoomstart, and zoomend events; each defaults to a no-op

JavaScript

planetaryjs.plugins.zoom({
  scaleExtent: [200, 1000],
  onZoom: function() {
    console.log("The planet was zoomed!", d3.event);
  }
});