void calc_show_los();

void calc_show_los()
{
    if (!crawl_state.arena && !crawl_state.arena_suspended)
    {
        // Must be done first.
        losight(env.show, grd, you.pos());

        // What would be visible, if all of the translucent walls were
        // made opaque.
        losight(env.no_trans_show, grd, you.pos(), true);
    }
    else
    {
        losight(env.show, grd, crawl_view.glosc());
    }
}

    if (!crawl_state.arena && !crawl_state.arena_suspended)
    {
        // Must be done first.
        losight(env.show, grd, you.pos());

    calc_show_los();

        // What would be visible, if all of the translucent walls were
        // made opaque.
        losight(env.no_trans_show, grd, you.pos(), true);
    }
    else
    {
        losight(env.show, grd, crawl_view.glosc());
    }

    you.prev_grd_targ = coord_def(0, 0);

    you.prev_grd_targ.reset();

    you.prev_grd_targ = coord_def(0, 0);

    you.prev_grd_targ.reset();

    // Rebuild the show grid, which was cleared out before.
    calc_show_los();