Retrieve global coordinates from parametric coordinates
I am currently trying to impose boundary conditions from a field function on a mesh generated with the gmsh Python API. For calculating the equivalent nodal forces, it would be quite useful to be able to retrieve the global coordinates from a parametric point in an element.
An example: I want to calculate a given function f(x,y,z) at each integration point. To do this, I would need the x(u), y(v), and z(w) functions. I know that there is a method getValue, however it only returns the coordinate on a given entity (in my case a geometric line) and not that of the element on that entity (a 1D element).
Any help (or ideas for other approaches) would be very appreciated.