Add RootNode::deleteChildOrTile()

Signed-off-by: Dan Bailey <[email protected]>

openvdb/openvdb/tree/RootNode.h

@@ -709,6 +709,11 @@ class RootNode
     template<typename AccessorT>
     void addTileAndCache(Index level, const Coord& xyz, const ValueType&, bool state, AccessorT&);
 
+    /// @brief Delete any child or tile containing voxel (x, y, z) at the root level.
+    /// Do nothing if no child or tile was found.
+    /// @return @c true if child or tile was deleted
+    bool deleteChildOrTile(const Coord& xyz);
+
     /// @brief Return a pointer to the leaf node that contains voxel (x, y, z).
     /// If no such node exists, create one that preserves the values and
     /// active states of all voxels.
@@ -2700,6 +2705,15 @@ RootNode<ChildT>::addTileAndCache(Index level, const Coord& xyz, const ValueType
 }
 
 
+template<typename ChildT>
+inline bool
+RootNode<ChildT>::deleteChildOrTile(const Coord& xyz)
+{
+    Coord key = this->coordToKey(xyz);
+    return mTable.erase(key) == size_t(1);
+}
+
+
 ////////////////////////////////////////