Merge pull request #1036 from twpayne/async-tile-load

Asynchronos tile URL calculation

src/ol/tilecoord.js

@@ -1,6 +1,7 @@
 goog.provide('ol.TileCoord');
 
 goog.require('goog.array');
+goog.require('goog.asserts');
 
 
 /**
@@ -113,6 +114,23 @@ ol.TileCoord.getKeyZXY = function(z, x, y) {
 };
 
 
+/**
+ * @param {Array.<number>=} opt_result Optional array to reuse.
+ * @return {Array.<number>} Array of z, x, y.
+ */
+ol.TileCoord.prototype.getZXY = function(opt_result) {
+  if (goog.isDef(opt_result)) {
+    goog.asserts.assert(opt_result.length == 3);
+    opt_result[0] = this.z;
+    opt_result[1] = this.x;
+    opt_result[2] = this.y;
+    return opt_result;
+  } else {
+    return [this.z, this.x, this.y];
+  }
+};
+
+
 /**
  * @return {number} Hash.
  */