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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="SNESMultiblockSetFields"><H1>SNESMultiblockSetFields</H1></A>
Sets the fields for one particular block in the solver
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscsnes.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../SNES/SNESMultiblockSetFields.html#SNESMultiblockSetFields">SNESMultiblockSetFields</A>(<A HREF="../SNES/SNES.html#SNES">SNES</A> snes, const char name[], <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> n, const <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *fields)
</PRE>
Logically Collective on <A HREF="../SNES/SNES.html#SNES">SNES</A>
<P>
<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>snes </B></TD><TD>- the solver
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>name </B></TD><TD>- name of this block, if NULL the number of the block is used
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- the number of fields in this block
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>fields </B></TD><TD>- the fields in this block
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Use <A HREF="../SNES/SNESMultiblockSetIS.html#SNESMultiblockSetIS">SNESMultiblockSetIS</A>() to set a completely general set of row indices as a block.
<P>
The <A HREF="../SNES/SNESMultiblockSetFields.html#SNESMultiblockSetFields">SNESMultiblockSetFields</A>() is for defining blocks as a group of strided indices, or fields.
For example, if the vector block size is three then one can define a block as field 0, or
1 or 2, or field 0,1 or 0,2 or 1,2 which means
0xx3xx6xx9xx12 ... x1xx4xx7xx ... xx2xx5xx8xx.. 01x34x67x... 0x1x3x5x7.. x12x45x78x....
where the numbered entries indicate what is in the block.
<P>
This function is called once per block (it creates a new block each time). Solve options
for this block will be available under the prefix -multiblock_BLOCKNAME_.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../SNES/SNESMultiblockGetSubSNES.html#SNESMultiblockGetSubSNES">SNESMultiblockGetSubSNES</A>(), <A HREF="../SNES/SNESMULTIBLOCK.html#SNESMULTIBLOCK">SNESMULTIBLOCK</A>, <A HREF="../SNES/SNESMultiblockSetBlockSize.html#SNESMultiblockSetBlockSize">SNESMultiblockSetBlockSize</A>(), <A HREF="../SNES/SNESMultiblockSetIS.html#SNESMultiblockSetIS">SNESMultiblockSetIS</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/snes/impls/multiblock/multiblock.c.html#SNESMultiblockSetFields">src/snes/impls/multiblock/multiblock.c</A>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/snes/impls/multiblock/multiblock.c.html#SNESMultiblockSetFields_Default">SNESMultiblockSetFields_Default in src/snes/impls/multiblock/multiblock.c</A><BR>
<BR><A HREF="./index.html">Index of all SNES routines</A>
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