fixed bug with terrain grid and cached neighbours in terrainQuad not being reset

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@8673 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/terrain/com/jme3/terrain/geomipmap/TerrainGrid.java

@@ -105,6 +105,7 @@ public class TerrainGrid extends TerrainQuad {
 
                             public Object call() throws Exception {
                                 attachQuadAt(newQuad, quadrant, temp);
+                                newQuad.resetCachedNeighbours();
                                 return null;
                             }
                         });
@@ -255,7 +256,6 @@ public class TerrainGrid extends TerrainQuad {
         for (TerrainGridListener l : listeners.values()) {
             l.tileAttached(cam, q);
         }
-        System.err.println("attachQuadAt "+quadrant+", children: "+this.getChildren().size());
         updateModelBound();
     }
 

engine/src/terrain/com/jme3/terrain/geomipmap/TerrainQuad.java

@@ -545,6 +545,24 @@ public class TerrainQuad extends Node implements Terrain {
         }
     }
 
+    /**
+     * TerrainQuad caches neighbours for faster LOD checks.
+     * Sometimes you might want to reset this cache (for instance in TerrainGrid)
+     */
+    protected void resetCachedNeighbours() {
+        if (children != null) {
+            for (int x = children.size(); --x >= 0;) {
+                Spatial child = children.get(x);
+                if (child instanceof TerrainQuad) {
+                    ((TerrainQuad) child).resetCachedNeighbours();
+                } else if (child instanceof TerrainPatch) {
+                    TerrainPatch patch = (TerrainPatch) child;
+                    patch.searchedForNeighboursAlready = false;
+                }
+            }
+        }
+    }
+    
     /**
      * Find any neighbours that should have their edges seamed because another neighbour
      * changed its LOD to a greater value (less detailed)