  We propose a new construction which associates to any ample (or big) line
bundle $L$ on a projective manifold $X$ a canonical growth condition (i.e. a
choice of a psh function well-defined up to a bounded term) on the tangent
space $T_p X$ of any given point $p$. We prove that it encodes such classical
invariants as the volume and the Seshadri constant. Even stronger, it allows
you to recover all the infinitesimal Okounkov bodies of $L$ at $p$. The
construction is inspired by toric geometry and the theory of Okounkov bodies;
in the toric case the growth condition is "equivalent" to the moment polytope.
As in the toric case the growth condition says a lot about the K\"ahler
geometry of the manifold. We prove a theorem about K\"ahler embeddings of large
balls, which generalizes the well-known connection between Seshadri constants
and Gromov width established by McDuff and Polterovich.
