[Nek5000-users] r,s,t index for given point

[nek5000-users at lists.mcs.anl.gov]

Howdy Neks,

is there a function in Nek that for a given point in x,y,z would return 
processor number, element number and r,s,t index of the nearest GLL grid 
point? I was desperately trying to figure out how the interpolation 
routines (f.e. for history points) would help me, but I only got garbage 
(-1, 0 and 1) back for the variables I would expect contain r,s,t. It 
worked with the element number, however.

Thanks,
Markus