Please hit "Reply to all" in the future - that way questions and
answers go out to the mailing list and get archived for others too.

On Thu, 22 Aug 2013, Praveen C wrote:

> I was looking at some functions in XYZ like this
> http://libmesh.sourceforge.net/doxygen/fe__xyz__shape__1D_8C_source.php
> 
> It seemed like I can evaluate the basis function at any xyz location. I 
> thought I will get the physical coordinates of the quadrature point on
> "elem" and evaluate basis function on "nbr_elem" at these physical 
> coordinates. Is this not possible ?

Actually, it looks like you're right!  Every other shape(),
shape_deriv(), etc. implementation takes master space coordinates,
but it looks like XYZ takes physical space coordinates.  I'd call that
an atrociously bad design (in particular it means that all our
solution projection code is probably *broken* on XYZ elements...) but
if it works for your case that's a nice silver lining.

And yes, as long as you're using elem to generate the quadrature
points interior to elem then the inverse mapping issues I raised
before probably won't be a problem for you.
---
Roy

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