ar_x[0] = -1;
    ar_y[0] = -1;
    ar_z[0] = 0;

    ar_x[1] = 0;
    ar_y[1] = -1;
    ar_z[1] = 0;

    ar_x[2] = 0;
    ar_y[2] = -1;
    ar_z[2] = -1;

    ar_x[3] = -1;
    ar_y[3] = -1;
    ar_z[3] = -1;

    ar_x[4] = 0;
    ar_y[4] = 0;
    ar_z[4] = 0;

    ar_x[5] = 1;
    ar_y[5] = 0;
    ar_z[5] = 0;

    ar_x[6] = 1;
    ar_y[6] = 0;
    ar_z[6] = -1;

    ar_x[7] = 0;
    ar_y[7] = 0;
    ar_z[7] = -1;

    ar_x[8] = -1;
    ar_y[8] = 1;
    ar_z[8] = 0;

    ar_x[9] = 1;
    ar_y[9] = 1;
    ar_z[9] = 0;

    ar_x[10] = 1;
    ar_y[10] = 1;
    ar_z[10] = -1;

    ar_x[11] = -1;
    ar_y[11] = 1;
    ar_z[11] = -1;