Add performs_global_coarsening()

dealii · Dec 5, 2023 · 4a34731 · 4a34731
1 parent 9b505b5
commit 4a34731
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diff --git a/include/deal.II/multigrid/mg_transfer_matrix_free.h b/include/deal.II/multigrid/mg_transfer_matrix_free.h
@@ -1167,6 +1167,15 @@ class MGTransferMatrixFree : public dealii::MGLevelGlobalTransfer<
   void
   clear();
 
+  /**
+   * Indicate if global coarsening or local smoothing is performed. Note
+   * that in the case local smoothing copy_to_mg() and copy_from_mg()
+   * are more complex and edge constraints need to be considered during
+   * the multigrid algorithm.
+   */
+  bool
+  performs_global_coarsening() const;
+
   /** @} */
 
 private:

diff --git a/include/deal.II/multigrid/mg_transfer_matrix_free.templates.h b/include/deal.II/multigrid/mg_transfer_matrix_free.templates.h
@@ -4320,6 +4320,14 @@ MGTransferMatrixFree<dim, Number>::clear()
 }
 
 
+template <int dim, typename Number>
+inline bool
+MGTransferMatrixFree<dim, Number>::performs_global_coarsening() const
+{
+  return this->perform_plain_copy || this->perform_renumbered_plain_copy;
+}
+
+
 
 template <int dim, typename Number>
 MGTransferBlockMatrixFree<dim, Number>::MGTransferBlockMatrixFree(