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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.14.5 v3.14.5 docs/manualpages/DM/DMRefineHookAdd.html "><small>Report Typos and Errors</small></a></div>
<A NAME="DMRefineHookAdd"><H1>DMRefineHookAdd</H1></A>
adds a callback to be run when interpolating a nonlinear problem to a finer grid
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../DM/DMRefineHookAdd.html#DMRefineHookAdd">DMRefineHookAdd</A>(<A HREF="../DM/DM.html#DM">DM</A> coarse,<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> (*refinehook)(<A HREF="../DM/DM.html#DM">DM</A>,<A HREF="../DM/DM.html#DM">DM</A>,void*),<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> (*interphook)(<A HREF="../DM/DM.html#DM">DM</A>,<A HREF="../Mat/Mat.html#Mat">Mat</A>,<A HREF="../DM/DM.html#DM">DM</A>,void*),void *ctx)
</PRE>
Logically Collective
<P>
<H3><FONT COLOR="#CC3333">Input Arguments</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>coarse </B></TD><TD>- nonlinear solver context on which to run a hook when restricting to a coarser level
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>refinehook </B></TD><TD>- function to run when setting up a coarser level
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>interphook </B></TD><TD>- function to run to update data on finer levels (once per <A HREF="../SNES/SNESSolve.html#SNESSolve">SNESSolve</A>())
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ctx </B></TD><TD>- [optional] user-defined context for provide data for the hooks (may be NULL)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Calling sequence of refinehook</FONT></H3>
<pre>
refinehook(<A HREF="../DM/DM.html#DM">DM</A> coarse,<A HREF="../DM/DM.html#DM">DM</A> fine,void *ctx);
</pre>
<P>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>coarse </B></TD><TD>- coarse level <A HREF="../DM/DM.html#DM">DM</A>
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>fine </B></TD><TD>- fine level <A HREF="../DM/DM.html#DM">DM</A> to interpolate problem to
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ctx </B></TD><TD>- optional user-defined function context
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Calling sequence for interphook</FONT></H3>
<pre>
interphook(<A HREF="../DM/DM.html#DM">DM</A> coarse,<A HREF="../Mat/Mat.html#Mat">Mat</A> interp,<A HREF="../DM/DM.html#DM">DM</A> fine,void *ctx)
</pre>
<P>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>coarse </B></TD><TD>- coarse level <A HREF="../DM/DM.html#DM">DM</A>
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>interp </B></TD><TD>- matrix interpolating a coarse-level solution to the finer grid
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>fine </B></TD><TD>- fine level <A HREF="../DM/DM.html#DM">DM</A> to update
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ctx </B></TD><TD>- optional user-defined function context
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
This function is only needed if auxiliary data needs to be passed to fine grids while grid sequencing
<P>
If this function is called multiple times, the hooks will be run in the order they are added.
<P>
This function is currently not available from Fortran.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMCoarsenHookAdd.html#DMCoarsenHookAdd">DMCoarsenHookAdd</A>(), <A HREF="../SNESFAS/SNESFASGetInterpolation.html#SNESFASGetInterpolation">SNESFASGetInterpolation</A>(), <A HREF="../SNESFAS/SNESFASGetInjection.html#SNESFASGetInjection">SNESFASGetInjection</A>(), <A HREF="../Sys/PetscObjectCompose.html#PetscObjectCompose">PetscObjectCompose</A>(), <A HREF="../Sys/PetscContainerCreate.html#PetscContainerCreate">PetscContainerCreate</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>advanced<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/dm/interface/dm.c.html#DMRefineHookAdd">src/dm/interface/dm.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/snes/tutorials/ex48.c.html">src/snes/tutorials/ex48.c.html</A><BR>
<BR><A HREF="./index.html">Index of all DM routines</A>
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