Extracting and Using Ghosts

• Ghosts are always given larger numbers than non-ghosts—that is, ghosts are at the end

• FEM_Get_node_ghost() and FEM_Get_elem_ghost(e)

  • Return the index of the first ghost node or element

• FEM_Update_ghost_field(fid,e,data)

  • Obtain other processor’s data (formatted like fid) for each ghost element of type e