  A two-dimensional special relativistic radiation-hydrodynamics code is
developed and applied to numerical simulations of supernova shock breakout in
bipolar explosions of a blue supergiant. Our calculations successfully simulate
the dynamical evolution of a blast wave in the star and its emergence from the
surface. Results of the model with spherical energy deposition show a good
agreement with previous simulations. Furthermore, we calculate several models
with bipolar energy deposition and compare their results with the spherically
symmetric model. The bolometric light curves of the shock breakout emission are
calculated by a ray-tracing method. Our radiation-hydrodynamic models indicate
that the early part of the shock breakout emission can be used to probe the
geometry of the blast wave produced as a result of the gravitational collapse
of the iron core.
