[Gmsh] a problem about the node ordering

Nan Li linan88433189 at gmail.com
Tue Nov 15 09:58:43 CET 2016


Thank you for you reply.

I calculate the jabobian matrix using   J=[(x_node(2)-x_node(1))/2 0;  0
(y_node(4)-y_node(1))/2]. This is a special case for rectangle element (not
applicable for general quadrilateral element).

If I calculate like this, all the terms will be zeros when the ordering
changes. I have talked with Jeremy and I will change this formula to adapt
to more general cases.

Li Nan
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