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<TITLE>DMPlexGetAdjacency</TITLE>
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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
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<A NAME="DMPlexGetAdjacency"><H1>DMPlexGetAdjacency</H1></A>
Return all points adjacent to the given point
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdmplex.h"
#include "petscdmlabel.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../DMPLEX/DMPlexGetAdjacency.html#DMPlexGetAdjacency">DMPlexGetAdjacency</A>(<A HREF="../DM/DM.html#DM">DM</A> dm, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> p, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *adjSize, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *adj[])
</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> object
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>p </B></TD><TD>- The point
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>adjSize </B></TD><TD>- The maximum size of adj if it is non-NULL, or <A HREF="../Sys/PETSC_DETERMINE.html#PETSC_DETERMINE">PETSC_DETERMINE</A>
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>adj </B></TD><TD>- Either NULL so that the array is allocated, or an existing array with size adjSize
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>adjSize </B></TD><TD>- The number of adjacent points
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>adj </B></TD><TD>- The adjacent points
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
The user must <A HREF="../Sys/PetscFree.html#PetscFree">PetscFree</A> the adj array if it was not passed in.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMSetAdjacency.html#DMSetAdjacency">DMSetAdjacency</A>(), <A HREF="../DMPLEX/DMPlexDistribute.html#DMPlexDistribute">DMPlexDistribute</A>(), <A HREF="../DM/DMCreateMatrix.html#DMCreateMatrix">DMCreateMatrix</A>(), <A HREF="../DMPLEX/DMPlexPreallocateOperator.html#DMPlexPreallocateOperator">DMPlexPreallocateOperator</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/impls/plex/plexdistribute.c.html#DMPlexGetAdjacency">src/dm/impls/plex/plexdistribute.c</A>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/dm/impls/plex/plexdistribute.c.html#DMPlexGetAdjacency_Cone_Internal">DMPlexGetAdjacency_Cone_Internal in src/dm/impls/plex/plexdistribute.c</A><BR>
<A HREF="../../../src/dm/impls/plex/plexdistribute.c.html#DMPlexGetAdjacency_Support_Internal">DMPlexGetAdjacency_Support_Internal in src/dm/impls/plex/plexdistribute.c</A><BR>
<A HREF="../../../src/dm/impls/plex/plexdistribute.c.html#DMPlexGetAdjacency_Transitive_Internal">DMPlexGetAdjacency_Transitive_Internal in src/dm/impls/plex/plexdistribute.c</A><BR>
<A HREF="../../../src/dm/impls/plex/plexdistribute.c.html#DMPlexGetAdjacency_Internal">DMPlexGetAdjacency_Internal in src/dm/impls/plex/plexdistribute.c</A><BR>
<BR><A HREF="./index.html">Index of all DMPLEX routines</A>
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