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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
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<A NAME="DMPlexCreateFromDAG"><H1>DMPlexCreateFromDAG</H1></A>
This takes as input the adjacency-list representation of the Directed Acyclic Graph (Hasse Diagram) encoding a mesh, and produces a <A HREF="../DM/DM.html#DM">DM</A>
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdmplex.h"
PetscErrorCode DMPlexCreateFromDAG(DM dm, PetscInt depth, const PetscInt numPoints[], const PetscInt coneSize[], const PetscInt cones[], const PetscInt coneOrientations[], const PetscScalar vertexCoords[])
</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 empty <A HREF="../DM/DM.html#DM">DM</A> object, usually from <A HREF="../DM/DMCreate.html#DMCreate">DMCreate</A>() and <A HREF="../DM/DMSetDimension.html#DMSetDimension">DMSetDimension</A>()
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>depth </B></TD><TD>- The depth of the DAG
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>numPoints </B></TD><TD>- The number of points at each depth
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>coneSize </B></TD><TD>- The cone size of each point
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>cones </B></TD><TD>- The concatenation of the cone points for each point, the cone list must be oriented correctly for each point
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>coneOrientations </B></TD><TD>- The orientation of each cone point
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>vertexCoords </B></TD><TD>- An array of numVertices*dim numbers, the coordinates of each vertex
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>dm </B> -The <A HREF="../DM/DM.html#DM">DM</A>
<br>
<P>
Note: Two triangles sharing a face would have input
<pre>
depth = 1, numPoints = [4 2], coneSize = [3 3 0 0 0 0]
</pre>
<pre>
cones = [2 3 4 3 5 4], coneOrientations = [0 0 0 0 0 0]
</pre>
<pre>
vertexCoords = [-1.0 0.0 0.0 -1.0 0.0 1.0 1.0 0.0]
</pre>
<pre>
</pre>
which would result in the DMPlex
<pre>
</pre>
<pre>
4
</pre>
<pre>
/ | \
</pre>
<pre>
/ | \
</pre>
<pre>
/ | \
</pre>
<pre>
2 0 | 1 5
</pre>
<pre>
\ | /
</pre>
<pre>
\ | /
</pre>
<pre>
\ | /
</pre>
<pre>
3
</pre>
<pre>
</pre>
<pre>
Notice that all points are numbered consecutively, unlikely <A HREF="../DM/DMPlexCreateFromCellList.html#DMPlexCreateFromCellList">DMPlexCreateFromCellList</A>()
</pre>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMPlexCreateFromCellList.html#DMPlexCreateFromCellList">DMPlexCreateFromCellList</A>(), <A HREF="../DM/DMPlexCreate.html#DMPlexCreate">DMPlexCreate</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/dm/impls/plex/plexcreate.c.html#DMPlexCreateFromDAG">src/dm/impls/plex/plexcreate.c</A>
<BR><A HREF="./index.html">Index of all DM routines</A>
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