Merge branch 'FixLODIssueWithObjectPaging' into 'master'

LOD issue with object paging

See merge request OpenMW/openmw!1007

(cherry picked from commit 5688b7b4d8df93fbf28307d2259c57f8d878eeb8)

269cd310 Use same world coordinates to compute distances

apps/openmw/mwrender/objectpaging.cpp

@@ -477,8 +477,7 @@ namespace MWRender
         constexpr auto copyMask = ~Mask_UpdateVisitor;
 
         AnalyzeVisitor analyzeVisitor(copyMask);
-        osg::Vec3f center3 = { center.x(), center.y(), 0.f };
-        analyzeVisitor.mCurrentDistance = (viewPoint - center3).length2();
+        analyzeVisitor.mCurrentDistance = (viewPoint - worldCenter).length2();
         float minSize = mMinSize;
         if (mMinSizeMergeFactor)
             minSize *= mMinSizeMergeFactor;