Mapping function values to mesh coordinates

[dthillaithevan]

Hi,

Is there a way to map the values of a given function so that it matches the ordering of the mesh coordinates?

For example given a function f how does f_ = f.vector()[:] relate to mesh.coordinates.dat.data?

In FEniCS there are the vertex_to_dof_map and dof_to_vertex_map to do this, is there something similar for firedrake?

Many thanks!