goog.require('ol.Graticule');
goog.require('ol.Map');
goog.require('ol.View');
goog.require('ol.layer.Vector');
goog.require('ol.proj');
goog.require('ol.source.GeoJSON');


proj4.defs('ESRI:53009', '+proj=moll +lon_0=0 +x_0=0 +y_0=0 +a=6371000 ' +
    '+b=6371000 +units=m +no_defs');

// Configure the Sphere Mollweide projection object with an extent,
// and a world extent. These are required for the Graticule.
var sphereMollweideProjection = ol.proj.get('ESRI:53009');
sphereMollweideProjection.setExtent([
  -9009954.605703328, -9009954.605703328,
  9009954.605703328, 9009954.605703328]);
sphereMollweideProjection.setWorldExtent([-179, -90, 179, 90]);

var map = new ol.Map({
  keyboardEventTarget: document,
  layers: [
    new ol.layer.Vector({
      source: new ol.source.GeoJSON({
        projection: sphereMollweideProjection,
        url: 'data/geojson/countries-110m.geojson'
      })
    })
  ],
  renderer: 'canvas',
  target: 'map',
  view: new ol.View({
    center: [0, 0],
    projection: sphereMollweideProjection,
    resolutions: [65536, 32768, 16384, 8192, 4096, 2048],
    zoom: 0
  })
});

var graticule = new ol.Graticule({
  map: map
});