Build and parse examples from examples_src/

examples_src/xyz-esri-4326-512.js

@@ -0,0 +1,72 @@
+goog.require('ol.Attribution');
+goog.require('ol.Map');
+goog.require('ol.View');
+goog.require('ol.extent');
+goog.require('ol.layer.Tile');
+goog.require('ol.proj');
+goog.require('ol.source.TileImage');
+goog.require('ol.tilegrid.TileGrid');
+
+var attribution = new ol.Attribution({
+  html: 'Copyright:© 2013 ESRI, i-cubed, GeoEye'
+});
+
+var projection = ol.proj.get('EPSG:4326');
+var projectionExtent = projection.getExtent();
+
+// The tile size supported by the ArcGIS tile service.
+var tileSize = 512;
+
+// Calculate the resolutions supported by the ArcGIS tile service.
+// There are 16 resolutions, with a factor of 2 between successive
+// resolutions. The max resolution is such that the world (360°)
+// fits into two (512x512 px) tiles.
+var maxResolution = ol.extent.getWidth(projectionExtent) / (tileSize * 2);
+var resolutions = new Array(16);
+var z;
+for (z = 0; z < 16; ++z) {
+  resolutions[z] = maxResolution / Math.pow(2, z);
+}
+
+var urlTemplate = 'http://services.arcgisonline.com/arcgis/rest/services/' +
+    'ESRI_Imagery_World_2D/MapServer/tile/{z}/{y}/{x}';
+
+var map = new ol.Map({
+  target: 'map',
+  layers: [
+    new ol.layer.Tile({
+      /* ol.source.XYZ and ol.tilegrid.XYZ have no resolutions config */
+      source: new ol.source.TileImage({
+        attributions: [attribution],
+        tileUrlFunction: function(tileCoord, pixelRatio, projection) {
+          var z = tileCoord[0];
+          var x = tileCoord[1];
+          var y = -tileCoord[2] - 1;
+          // wrap the world on the X axis
+          var n = Math.pow(2, z + 1); // 2 tiles at z=0
+          x = x % n;
+          if (x * n < 0) {
+            // x and n differ in sign so add n to wrap the result
+            // to the correct sign
+            x = x + n;
+          }
+          return urlTemplate.replace('{z}', z.toString())
+              .replace('{y}', y.toString())
+              .replace('{x}', x.toString());
+        },
+        projection: projection,
+        tileGrid: new ol.tilegrid.TileGrid({
+          origin: ol.extent.getTopLeft(projectionExtent),
+          resolutions: resolutions,
+          tileSize: 512
+        })
+      })
+    })
+  ],
+  view: new ol.View({
+    center: [0, 0],
+    projection: projection,
+    zoom: 2,
+    minZoom: 2
+  })
+});