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<TITLE>DMDAGetPreallocationCenterDimension</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="DMDAGetPreallocationCenterDimension"><H1>DMDAGetPreallocationCenterDimension</H1></A>
Return the topology used to determine adjacency
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdmda.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../DMDA/DMDAGetPreallocationCenterDimension.html#DMDAGetPreallocationCenterDimension">DMDAGetPreallocationCenterDimension</A>(<A HREF="../DM/DM.html#DM">DM</A> dm, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *preallocCenterDim)
</PRE>
<H3><FONT COLOR="#CC3333">Input Parameter</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></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>preallocCenterDim </B></TD><TD>- The dimension of points which connect adjacent entries
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
<pre>
FEM: Two points p and q are adjacent if q \in closure(star(p)), preallocCenterDim = dim
</pre>
<pre>
FVM: Two points p and q are adjacent if q \in star(cone(p)), preallocCenterDim = dim-1
</pre>
<pre>
FVM++: Two points p and q are adjacent if q \in star(closure(p)), preallocCenterDim = 0
</pre>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMCreateMatrix.html#DMCreateMatrix">DMCreateMatrix</A>(), DMDAPreallocateOperator(), <A HREF="../DMDA/DMDASetPreallocationCenterDimension.html#DMDASetPreallocationCenterDimension">DMDASetPreallocationCenterDimension</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/impls/da/dapreallocate.c.html#DMDAGetPreallocationCenterDimension">src/dm/impls/da/dapreallocate.c</A>
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