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<div id="version" align=right><b>petsc-3.10.3 2018-12-18</b></div>
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<A NAME="DMAddBoundary"><H1>DMAddBoundary</H1></A>
Add a boundary condition to the model
<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/DMAddBoundary.html#DMAddBoundary">DMAddBoundary</A>(<A HREF="../DM/DM.html#DM">DM</A> dm, <A HREF="../DM/DMBoundaryConditionType.html#DMBoundaryConditionType">DMBoundaryConditionType</A> type, const char name[], const char labelname[], <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> field, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> numcomps, const <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *comps, void (*bcFunc)(void), <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> numids, const <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *ids, void *ctx)
</PRE>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dm </B></TD><TD>- The <A HREF="../DM/DM.html#DM">DM</A>, with a <A HREF="../DM/PetscDS.html#PetscDS">PetscDS</A> that matches the problem being constrained
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>type </B></TD><TD>- The type of condition, e.g. DM_BC_ESSENTIAL_ANALYTIC/<A HREF="../DM/DMBoundaryConditionType.html#DMBoundaryConditionType">DM_BC_ESSENTIAL_FIELD</A> (Dirichlet), or <A HREF="../DM/DMBoundaryConditionType.html#DMBoundaryConditionType">DM_BC_NATURAL</A> (Neumann)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>name </B></TD><TD>- The BC name
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>labelname </B></TD><TD>- The label defining constrained points
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>field </B></TD><TD>- The field to constrain
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>numcomps </B></TD><TD>- The number of constrained field components
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>comps </B></TD><TD>- An array of constrained component numbers
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>bcFunc </B></TD><TD>- A pointwise function giving boundary values
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>numids </B></TD><TD>- The number of <A HREF="../DM/DMLabel.html#DMLabel">DMLabel</A> ids for constrained points
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ids </B></TD><TD>- An array of ids for constrained points
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ctx </B></TD><TD>- An optional user context for bcFunc
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-bc_<boundary name> <num> </B></TD><TD>- Overrides the boundary ids
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-bc_<boundary name>_comp <num> </B></TD><TD>- Overrides the boundary components
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMGetBoundary.html#DMGetBoundary">DMGetBoundary</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>developer<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/dm/interface/dm.c.html#DMAddBoundary">src/dm/interface/dm.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/dm/impls/plex/examples/tutorials/ex2.c.html">src/dm/impls/plex/examples/tutorials/ex2.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex56.c.html">src/snes/examples/tutorials/ex56.c.html</A><BR>
<BR><A HREF="./index.html">Index of all DM routines</A>
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