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<A NAME="DASetBlockFills"><H1>DASetBlockFills</H1></A>
Sets the fill pattern in each block for a multi-component problem of the matrix returned by <A HREF="../DA/DAGetMatrix.html#DAGetMatrix">DAGetMatrix</A>().
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscda.h"
#include "petscmat.h"
PetscErrorCode PETSCDM_DLLEXPORT DASetBlockFills(DA da,PetscInt *dfill,PetscInt *ofill)
</PRE>
Collective on <A HREF="../DA/DA.html#DA">DA</A>
<P>
<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>da </B></TD><TD>- the distributed array
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dfill </B></TD><TD>- the fill pattern in the diagonal block (may be <A HREF="../Sys/PETSC_NULL.html#PETSC_NULL">PETSC_NULL</A>, means use dense block)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ofill </B></TD><TD>- the fill pattern in the off-diagonal blocks
</TD></TR></TABLE>
<P>
<P>
<P>
Notes: This only makes sense when you are doing multicomponent problems but using the
MPIAIJ matrix format
<P>
The format for dfill and ofill is a 2 dimensional dof by dof matrix with 1 entries
representing coupling and 0 entries for missing coupling. For example
<pre>
dfill[9] = {1, 0, 0,
</pre>
<pre>
1, 1, 0,
</pre>
<pre>
0, 1, 1}
</pre>
means that row 0 is coupled with only itself in the diagonal block, row 1 is coupled with
itself and row 0 (in the diagonal block) and row 2 is coupled with itself and row 1 (in the
diagonal block).
<P>
<A HREF="../DA/DASetGetMatrix.html#DASetGetMatrix">DASetGetMatrix</A>() allows you to provide general code for those more complicated nonzero patterns then
can be represented in the dfill, ofill format
<P>
Contributed by Glenn Hammond
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DA/DAGetMatrix.html#DAGetMatrix">DAGetMatrix</A>(), <A HREF="../DA/DASetGetMatrix.html#DASetGetMatrix">DASetGetMatrix</A>(), <A HREF="../DA/DASetMatPreallocateOnly.html#DASetMatPreallocateOnly">DASetMatPreallocateOnly</A>()
<BR>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>developer
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/dm/da/utils/fdda.c.html#DASetBlockFills">src/dm/da/utils/fdda.c</A>
<BR><A HREF="./index.html">Index of all DA routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/snes/examples/tutorials/ex29.c.html">src/snes/examples/tutorials/ex29.c.html</A><BR>
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