Adding Loc.add method.

2012-06-24 10:09:24 +02:00
parent 587512cac8
commit 81577d6dce
3 changed files with 22 additions and 8 deletions
@@ -120,6 +120,22 @@ ol.Loc.prototype.doTransform = function(proj) {
    return new ol.Loc(point['x'], point['y'], this.z_, proj);
 };

+/**
+ * Adds the passed x, y(, z) delta to a new location.
+ *
+ * @param {number} x
+ * @param {number} y
+ * @param {number=} opt_z
+ * @returns {ol.Loc}
+ */
+ol.Loc.prototype.add = function(x, y, opt_z) {
+    var newZ;
+    if (goog.isDef(this.z_)) {
+        newZ = (opt_z || 0) + this.z_;
+    }
+    return new ol.Loc(this.x_ + x, this.y_ + y, newZ, this.projection_);
+};
+
 /**
 * Clean up.
 * @export