petsc-master 2019-09-22
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PetscSFComputeMultiRootOriginalNumbering

Returns original numbering of multi-roots (roots of multi-SF returned by PetscSFGetMultiSF()). Each multi-root is assigned index of the corresponding original root.

Synopsis

#include "petscsf.h" 
PetscErrorCode PetscSFComputeMultiRootOriginalNumbering(PetscSF sf, const PetscInt degree[], PetscInt *nMultiRoots, PetscInt *multiRootsOrigNumbering[])
Collective

Input Arguments

sf - star forest
degree - degree of each root vertex, computed with PetscSFComputeDegreeBegin()/PetscSFComputeDegreeEnd()

Output Arguments

nMultiRoots - (optional) number of multi-roots (roots of multi-SF)
multiRootsOrigNumbering - original indices of multi-roots; length of this array is nMultiRoots

Notes

The returned array multiRootsOrigNumbering is newly allocated and should be destroyed with PetscFree() when no longer needed.

See Also

PetscSFComputeDegreeBegin(), PetscSFComputeDegreeEnd(), PetscSFGetMultiSF()

Level

developer

Location

src/vec/is/sf/interface/sf.c

Examples

src/vec/is/sf/examples/tutorials/ex1.c.html

Index of all PetscSF routines
Table of Contents for all manual pages
Index of all manual pages