[Numpy-discussion] Can this function by Numpy-ized?
Paul F. Dubois
paul at pfdubois.com
Sun Aug 26 12:32:28 CDT 2001
def cgqp(QuadPoint, TrngleNode, a):
s = a.Qpnt[Quadpoint,:]
c = Numeric.take(a.NodeCord, TrngleNode)
return Numeric.add.reduce(s * c, axis=1)
This may or may not be right. The data structures I would have to set up
to test it are too much for Sunday morning.
-----Original Message-----
From: numpy-discussion-admin at lists.sourceforge.net
[mailto:numpy-discussion-admin at lists.sourceforge.net] On Behalf Of Rob
Sent: Sunday, August 26, 2001 8:39 AM
To: numpy-discussion at lists.sourceforge.net.
Subject: [Numpy-discussion] Can this function by Numpy-ized?
I finally got my FEM EM code working. I profiled it and this function
uses up a big hunk of time. It performs gaussian integration over a
triangle. I am trying to figure out how to slice the arrays so as to
push it down into the C level. Does anyone have any ideas? Thanks,
Rob.
ps. it looks to be intractible to me. Maybe I need to look at writing a
C extension. I've never done that before.
##**********************************************************************
*****
##Prototype: void ComputeGaussQuadPoint(int QuadPoint, int
*a.TrngleNode,
## double *SrcPointCol)
##Description: To compute the coordinates of 7-point Gauss nodes of
## a triangular patch.
##Input value:
## int QuadPoint --- node index, it can be from 0 to 6.
## int *a.TrngleNode --- the three nodes of a tringular patch.
## double *SrcPointCol --- where to store the results
##Return value: none
##Global value used: a.NodeCord, a.Qpnt
##Global value modified: none
##Subroutines called: none
##Note: Not very sure.
************************************************************************
****
def ComputeGaussQuadPoint(QuadPoint,TrngleNode,a):
SrcPointCol=zeros((3),Float)
SrcPointCol[0] = a.Qpnt[QuadPoint,0]*a.NodeCord[TrngleNode[0],0]\
+ a.Qpnt[QuadPoint,1]*a.NodeCord[TrngleNode[1],0]\
+ a.Qpnt[QuadPoint,2]*a.NodeCord[TrngleNode[2],0]
SrcPointCol[1] = a.Qpnt[QuadPoint,0]*a.NodeCord[TrngleNode[0],1]\
+ a.Qpnt[QuadPoint,1]*a.NodeCord[TrngleNode[1],1]\
+ a.Qpnt[QuadPoint,2]*a.NodeCord[TrngleNode[2],1]
SrcPointCol[2] = a.Qpnt[QuadPoint,0]*a.NodeCord[TrngleNode[0],2]\
+ a.Qpnt[QuadPoint,1]*a.NodeCord[TrngleNode[1],2]\
+ a.Qpnt[QuadPoint,2]*a.NodeCord[TrngleNode[2],2]
return SrcPointCol
--
The Numeric Python EM Project
www.members.home.net/europax
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