  A fluid constituted of hard spherocylinders is studied using a density
functional theory for non-spherical hard particles, which can be written as a
function of weighted densities. This is based on an extended deconvolution of
the Mayer $f$-function for arbitrarily shaped convex hard bodies in tensorial
weight functions, which depend each only on the shape and orientation of a
single particle. In the course of an examination of the isotropic- nematic
interface at coexistence the functional is applied to anisotropic and
inhomogeneous problems for the first time. We find good qualitative agreement
with other theoretical predictions and also with Monte-Carlo simulations.
