static void do_movements(playerinfo_t &plrinfo, bool unduckable_onto_ground)
{
    // If we are going to unduck onto ground, set the position type correctly
    // so that the strafing stuff later will be correct.
    if (unduckable_onto_ground && plrinfo.postype == PositionAir &&
        !(p_in_duck->state & 1) && duck_action != 1 && jump_action != 1)
        plrinfo.postype = PositionGround;

    // If we are going to ducktap
    if (get_duckstate() == 1 && duck_action != 1 && !(p_in_duck->state & 1) &&
        is_unduckable(plrinfo))
        plrinfo.postype = PositionAir;

    // If we are going to jump
    if ((jump_action == 1 || p_in_jump->state & 1) &&
        !is_jump_in_oldbuttons() && plrinfo.postype == PositionGround) {
        plrinfo.postype = PositionAir;
        if (tas_dwj) {
            tas_dwj--;
            duck_action = 1;
        }
    }

    if (do_tas_s2y.do_it) {
        convert_s2y_to_sba(plrinfo);
        do_tas_s2y.do_it = false;
        do_tas_sba.do_it = true;
    }

    if (do_tas_sba.do_it) {
        double speed = std::hypot(plrinfo.vel[0], plrinfo.vel[1]);
        if (speed < 0.1) {
            prev_unitvel[0] = std::cos(plrinfo.viewangles[1] * M_PI / 180);
            prev_unitvel[1] = std::sin(plrinfo.viewangles[1] * M_PI / 180);
        } else {
            prev_unitvel[0] = plrinfo.vel[0] / speed;
            prev_unitvel[1] = plrinfo.vel[1] / speed;
        }

        // The strafe by angle functionality remains active.  Setting do_it to
        // false simply means we will not update prev_unitvel here for the
        // subsequent frames.
        do_tas_sba.do_it = false;
    }

    load_player_movevars(plrinfo);
    add_correct_gravity(plrinfo);

    if (g_moveaction == StrafeNone)
        do_strafe_none(plrinfo);
    else
        do_strafe_tas(plrinfo);

    orig_SetViewAngles(plrinfo.viewangles);
    update_position(plrinfo);
    do_tassba(plrinfo);
}