private boolean isCourseTraversable(double par1, double par3, double par5, double par7)
  {
    double d4 = (this.waypointX - this.field_70165_t) / par7;
    double d5 = (this.waypointY - this.field_70163_u) / par7;
    double d6 = (this.waypointZ - this.field_70161_v) / par7;
    AxisAlignedBB axisalignedbb = this.field_70121_D.func_72329_c();

    for (int i = 1; i < par7; i++)
    {
      axisalignedbb.func_72317_d(d4, d5, d6);

      if (!this.field_70170_p.func_72945_a(this, axisalignedbb).isEmpty())
      {
        return false;
      }
    }

    return true;
  }