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<TITLE>DMPlexGetTransitiveClosure</TITLE>
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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="DMPlexGetTransitiveClosure"><H1>DMPlexGetTransitiveClosure</H1></A>
Return the points on the transitive closure of the in-edges or out-edges for this point in the DAG
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdmplex.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../DMPLEX/DMPlexGetTransitiveClosure.html#DMPlexGetTransitiveClosure">DMPlexGetTransitiveClosure</A>(<A HREF="../DM/DM.html#DM">DM</A> dm, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> p, <A HREF="../Sys/PetscBool.html#PetscBool">PetscBool</A> useCone, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *numPoints, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *points[])
</PRE>
Not collective
<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>mesh </B></TD><TD>- The DMPlex
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>p </B></TD><TD>- The point, which must lie in the chart set with <A HREF="../DMPLEX/DMPlexSetChart.html#DMPlexSetChart">DMPlexSetChart</A>()
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>useCone </B></TD><TD>- <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A> for in-edges, otherwise use out-edges
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>points </B></TD><TD>- If points is NULL on input, internal storage will be returned, otherwise the provided array is used
</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>numPoints </B></TD><TD>- The number of points in the closure, so points[] is of size 2*numPoints
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>points </B></TD><TD>- The points and point orientations, interleaved as pairs [p0, o0, p1, o1, ...]
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Note</FONT></H3>
If using internal storage (points is NULL on input), each call overwrites the last output.
<P>
<H3><FONT COLOR="#CC3333">Fortran Notes</FONT></H3>
Since it returns an array, this routine is only available in Fortran 90, and you must
include petsc.h90 in your code.
<P>
The numPoints argument is not present in the Fortran 90 binding since it is internal to the array.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DMPLEX/DMPlexRestoreTransitiveClosure.html#DMPlexRestoreTransitiveClosure">DMPlexRestoreTransitiveClosure</A>(), <A HREF="../DMPLEX/DMPlexCreate.html#DMPlexCreate">DMPlexCreate</A>(), <A HREF="../DMPLEX/DMPlexSetCone.html#DMPlexSetCone">DMPlexSetCone</A>(), <A HREF="../DMPLEX/DMPlexSetChart.html#DMPlexSetChart">DMPlexSetChart</A>(), <A HREF="../DMPLEX/DMPlexGetCone.html#DMPlexGetCone">DMPlexGetCone</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>beginner<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/dm/impls/plex/plex.c.html#DMPlexGetTransitiveClosure">src/dm/impls/plex/plex.c</A>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/dm/impls/plex/plex.c.html#DMPlexGetTransitiveClosure_Internal">DMPlexGetTransitiveClosure_Internal in src/dm/impls/plex/plex.c</A><BR>
<BR><A HREF="./index.html">Index of all DMPLEX routines</A>
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