Make tb work with distant terrain

components/terrain/terraingrid.cpp

@@ -65,19 +65,6 @@ osg::ref_ptr<osg::Node> TerrainGrid::buildTerrain (osg::Group* parent, float chu
     }
 }
 
-void TerrainGrid::setBordersVisible(bool visible)
-{
-    mBorderVisible = visible;
-
-    if (visible)
-    {
-        for (MWRender::CellBorder::CellGrid::iterator it = mGrid.begin(); it != mGrid.end(); ++it)
-            mCellBorder->createCellBorderGeometry(it->first.first,it->first.second);
-    }
-    else
-        mCellBorder->destroyCellBorderGeometry();
-}
-
 void TerrainGrid::loadCell(int x, int y)
 {
     if (mGrid.find(std::make_pair(x, y)) != mGrid.end())

components/terrain/terraingrid.hpp

@@ -27,7 +27,6 @@ namespace Terrain
 
         View* createView();
 
-        virtual void setBordersVisible(bool visible) override;
     private:
         osg::ref_ptr<osg::Node> buildTerrain (osg::Group* parent, float chunkSize, const osg::Vec2f& chunkCenter);
 

components/terrain/world.cpp

@@ -70,7 +70,12 @@ void World::setBordersVisible(bool visible)
 {
     mBorderVisible = visible;
 
-    if (!visible)
+    if (visible)
+    {
+        for (std::set<std::pair<int,int>>::iterator it = mLoadedCells.begin(); it != mLoadedCells.end(); ++it)
+            mCellBorder->createCellBorderGeometry(it->first,it->second);
+    }
+    else
         mCellBorder->destroyCellBorderGeometry();
 }
 
@@ -78,12 +83,16 @@ void World::loadCell(int x, int y)
 {
     if (mBorderVisible)
         mCellBorder->createCellBorderGeometry(x,y);
+
+    mLoadedCells.insert(std::pair<int,int>(x,y));
 }
 
 void World::unloadCell(int x, int y)
 {
     if (mBorderVisible)
         mCellBorder->destroyCellBorderGeometry(x,y);
+
+    mLoadedCells.erase(std::pair<int,int>(x,y));
 }
 
 void World::setTargetFrameRate(float rate)

components/terrain/world.hpp

@@ -6,6 +6,7 @@
 #include <osg/Vec3f>
 
 #include <memory>
+#include <set>
 
 #include "defs.hpp"
 #include "cellborder.hpp"
@@ -118,6 +119,8 @@ namespace Terrain
         std::unique_ptr<MWRender::CellBorder> mCellBorder;
 
         bool mBorderVisible;
+
+        std::set<std::pair<int,int>> mLoadedCells;
     };
 }