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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="Compute_Lagrange_Basis_1D_Internal"><H1>Compute_Lagrange_Basis_1D_Internal</H1></A>
Evaluate bases and derivatives at quadrature points for a EDGE2 or EDGE3 element.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdt.h"
#include "petscdmmoab.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../DMMOAB/Compute_Lagrange_Basis_1D_Internal.html#Compute_Lagrange_Basis_1D_Internal">Compute_Lagrange_Basis_1D_Internal</A> ( const <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> nverts, const <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> *coords, const <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> npts, const <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> *quad, <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> *phypts,
<A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> *jxw, <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> *phi, <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> *dphidx,
<A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> *jacobian, <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> *ijacobian, <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> *volume)
</PRE>
The routine is given the coordinates of the vertices of a linear or quadratic edge element.
<P>
The routine evaluates the basis functions associated with each quadrature point provided,
and their derivatives with respect to X.
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
<P>
Example Physical Element
<P>
1-------2 1----3----2
EDGE2 EDGE3
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<P>
<DT><B><A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> nverts, the number of element vertices</B> -. <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> coords[3*nverts], the physical coordinates of the vertices (in canonical numbering)
<br>
<DT><B><A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> npts, the number of evaluation points (quadrature points)</B> -. <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> quad[3*npts], the evaluation points (quadrature points) in the reference space
<br>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B><A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> phypts[3*npts], the evaluation points (quadrature points) transformed to the physical space</B> -. <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> jxw[npts], the jacobian determinant * quadrature weight necessary for assembling discrete contributions
<br>
<DT><B><A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> phi[npts], the bases evaluated at the specified quadrature points</B> -. <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> dphidx[npts], the derivative of the bases wrt X-direction evaluated at the specified quadrature points
<br>
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
DMMoab, FEM, 1-D
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>advanced<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/dm/impls/moab/dmmbfem.cxx#Compute_Lagrange_Basis_1D_Internal">src/dm/impls/moab/dmmbfem.cxx</A>
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