SUBROUTINE TransferOverlap (INTEGER mSource, INTEGER mTarget, NodeInfo SourceInfo, NodeInfo TargetInfo)

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Looks for cells overlapping between SourceInfo and TargetInfo, and sets the user variables and grid cell counts in TargetInfo equal to the corresponding in SourceInfo. If there are no cells overlapping between the two grids, then this subroutine just returns without doing anything. Note that the two NodeInfo structures must have the same number of dimensions, although TransferOverlap() doesn't check for it. TransferOverlap() also triggers the transfer of auxiliary variables through a call to OverlapAuxCopy().

In single-processor mode or on a master processor, this function does the copying itself; on a worker processor in multi-processor mode, the copying of values is handled by the MPI_TransferOverlap() and MPI_TransferAuxOverlap() functions.

INCLUDES:

None.

USES:

• nodeinfodef.f90 supplies the NodeInfo data structure and some functions that operate on it.
• treeops.f90 supplies the Node and Forest structures and accompanying methods, as well as the ApplyOn_ functions.
• mpi_exec.f90 supplies functions used to set up distributed processing (most of which tend to have MPI_ somewhere in the name).
• serial_exec.f90 supplies functions used for single-processor processing.
• beario.f90 provides some file IO functions.
• scheme module supplies time-stepping scheme.
• contrib/astro/problem.f90 Contains problem-specific variables and functions.