Made the boundary box private to Graph.

src/tracks/drive_graph.cpp

@@ -122,9 +122,7 @@ void DriveGraph::load(const std::string &quad_file_name,
         bool ai_ignore=false;
         xml_node->get("ai-ignore", &ai_ignore);
         createQuad(p0, p1, p2, p3, m_all_nodes.size(), invisible, ai_ignore,
-            false/*is_arena*/);
-        m_bb_max.max(p0);m_bb_max.max(p1);m_bb_max.max(p2);m_bb_max.max(p3);
-        m_bb_min.min(p0);m_bb_min.min(p1);m_bb_min.min(p2);m_bb_min.min(p3);
+                   false/*is_arena*/);
     }
     delete quad;
 

src/tracks/graph.cpp

@@ -446,6 +446,9 @@ void Graph::createQuad(const Vec3 &p0, const Vec3 &p1, const Vec3 &p2,
     }
     m_all_nodes.push_back(q);
 
+    m_bb_max.max(p0); m_bb_max.max(p1); m_bb_max.max(p2); m_bb_max.max(p3);
+    m_bb_min.min(p0); m_bb_min.min(p1); m_bb_min.min(p2); m_bb_min.min(p3);
+
 }   // createQuad
 
 //-----------------------------------------------------------------------------

src/tracks/graph.hpp

@@ -51,16 +51,16 @@ class RTT;
   */
 class Graph : public NoCopy
 {
+private:
+    /** The 2d bounding box, used for hashing. */
+    Vec3 m_bb_min;
+    Vec3 m_bb_max;
+
 protected:
     static Graph* m_graph;
 
     std::vector<Quad*> m_all_nodes;
 
-    /** The 2d bounding box, used for hashing. */
-    Vec3 m_bb_min;
-
-    Vec3 m_bb_max;
-
     // ------------------------------------------------------------------------
     /** Factory method to dynamic create 2d / 3d quad for drive and arena
      *  graph. */