[Gmsh] MathEval and extrude

[Jonathan Mc Govern]

Hi there,

I have a tetrahedral mesh I created with extrude, from a triangular base,
in a .geo file. At the moment the domain is rectangular.

Does anyone know if there is a way in GMSH to set the thickness and surface
elevation to vary. In this case, the surface elevation to vary sinusoidally
as given by a certain function and a constant slope in the thickness as
given by a function.

I know there is MathEval - I was wondering if / how this can be used with
the tetrahedral mesh I created with extrude, so that the thickness and
surface elevation vary.
Thanks,

Jonathan
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