Add ol.TileCoord

2012-07-05 14:31:03 +02:00
parent b4e2e45166
commit 9f0738aa99
4 changed files with 50 additions and 3 deletions
@@ -0,0 +1,32 @@
+goog.provide('ol.TileCoord');
+
+goog.require('goog.math.Coordinate');
+
+
+
+/**
+ * @constructor
+ * @extends {goog.math.Coordinate}
+ * @param {number} z Z.
+ * @param {number} x X.
+ * @param {number} y Y.
+ */
+ol.TileCoord = function(z, x, y) {
+
+  goog.base(this, x, y);
+
+  /**
+   * @type {number}
+   */
+  this.z = z;
+
+};
+goog.inherits(ol.TileCoord, goog.math.Coordinate);
+
+
+/**
+ * @return {number} Hash.
+ */
+ol.TileCoord.prototype.hash = function() {
+  return (this.x << this.z) + this.y;
+};