// Everything is visible.
struct los_param_permissive : los_param_trans
{
    los_param_permissive(const coord_def& c);
    unsigned appearance(const coord_def& p) const;
    opacity_type opacity(const coord_def& p) const;
};

/* los_param_trans */

}
/* los_param_permissive */
los_param_permissive::los_param_permissive(const coord_def& c)
    : los_param_trans(c)
{

unsigned los_param_permissive::appearance(const coord_def& p) const
{
    return env.grid(trans(p));
}
opacity_type los_param_permissive::opacity(const coord_def& p) const
{
    return OPC_CLEAR;
}
/* los_param_base */

/* los_param_compat */