The tBoundary Structure

Each tBoundary instance is always associated with a particular tGrid. It contains all data pertaining to a particular boundary surface of that grid, as well as all direction-specific data associated with it. This includes the indices, refinement levels and MPI ranks of a grids neighbours.

Members

tBoundType type: Type of boundary. Most boundaries are of type PATCH_B, which means they are normal boundaries between grids.
tSymmetryType symtype: Only meaningful if type is SYMMETRY_B. Specifies what type of symmetry is realized at this boundary.
tDFType FTType: ???
tBoundSurface surface: Surface orientation of this boundary relative to its grid.
double facecenter[3]: Global (x,y,z) coordinates of the face center of this boundary.
int ne_rank: Deprecated, instead see ne4_rank.
int ne_ngrid_global: Deprecated, instead see ne4_ngrid_global.
tBoundSurface ne_surface: Surface orientation of this boundary, relative to its neighbour grid(s). At boundaries between patches this may be different from the reverse of surface.
int surface_sub: ???
int ne_hlevel: h-refinement level of neighbour grid.
int ne_sub: Subsurface-index as seen from neighbour grid. Only meaningful if neighbour grid has a lower h-refinement level.