From 31cfa0d9526a9e7b74d9c4bde8b59409caccd4b9 Mon Sep 17 00:00:00 2001
From: Andreas Hocevar <andreas.hocevar@gmail.com>
Date: Thu, 18 Jun 2015 09:48:32 +0200
Subject: [PATCH] Make tile range calculation work with arbitrary origins

---
 src/ol/tilegrid/tilegrid.js | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/src/ol/tilegrid/tilegrid.js b/src/ol/tilegrid/tilegrid.js
index fa64282323..16318df216 100644
--- a/src/ol/tilegrid/tilegrid.js
+++ b/src/ol/tilegrid/tilegrid.js
@@ -492,15 +492,10 @@ ol.tilegrid.TileGrid.prototype.getZForResolution = function(resolution) {
  * @private
  */
 ol.tilegrid.TileGrid.prototype.calculateTileRanges_ = function(extent) {
-  var extentWidth = ol.extent.getWidth(extent);
-  var extentHeight = ol.extent.getHeight(extent);
-  var fullTileRanges = new Array(this.resolutions_.length);
-  var tileSize;
-  for (var z = 0, zz = fullTileRanges.length; z < zz; ++z) {
-    tileSize = ol.size.toSize(this.getTileSize(z), this.tmpSize_);
-    fullTileRanges[z] = new ol.TileRange(
-        0, Math.ceil(extentWidth / tileSize[0] / this.resolutions_[z]) - 1,
-        0, Math.ceil(extentHeight / tileSize[1] / this.resolutions_[z]) - 1);
+  var length = this.resolutions_.length;
+  var fullTileRanges = new Array(length);
+  for (var z = this.minZoom; z < length; ++z) {
+    fullTileRanges[z] = this.getTileRangeForExtentAndZ(extent, z);
   }
   this.fullTileRanges_ = fullTileRanges;
 };