2个统一物体以不同速度移动

Question

我的场景中有2个球，我希望它们以一定的速度运动并随着时间的推移变得更高。 当我让它们沿一条直线移动时，它们保持不变，但是一旦我开始在x轴上移动它们，它们便会停留在我未移动的那根后面。 请帮帮我。 这是代码。

无效更新（）     {         ray（）;

    // If the game is paused, don't do anything
    if (PauseScreenBehaviour.paused)
        return;

    // Movement in the x axis
    float horizontalSpeed = 0;

    //Check if we are running either in the Unity editor or in a
    //standalone build.
    #if UNITY_STANDALONE || UNITY_WEBPLAYER
    // Check if we're moving to the side
    horizontalSpeed = Input.GetAxis("Horizontal") * dodgeSpeed;
    // If the mouse is held down (or the screen is tapped
    // on Mobile)
    if (Input.GetMouseButton(0))
    {
    horizontalSpeed = CalculateMovement(Input.mousePosition);
    }
    //Check if we are running on a mobile device
    #elif UNITY_IOS || UNITY_ANDROID

    if(horizMovement == MobileHorizMovement.Accelerometer)
    {
        // Move player based on direction of the accelerometer
        horizontalSpeed = Input.acceleration.x * dodgeSpeed;
    }

    // Check if Input has registered more than zero touches
    if (Input.touchCount > 0)
    {
        // Store the first touch detected.
        Touch touch = Input.touches[0];
        // Uncomment to use left and right movement
        //horizontalSpeed = CalculateMovement(touch.position);

        if(horizMovement == MobileHorizMovement.ScreenTouch)
        {
            horizontalSpeed = CalculateMovement(touch.position);
        }


    }
    #endif

    var movementForce = new Vector3(horizontalSpeed, 0, rollSpeed);
    // Time.deltaTime is the amount of time since the // last frame (approx. 1/60seconds) 
    movementForce *= (Time.deltaTime * 60);
    // Apply our auto-moving and movement forces rb.AddForce(movementForce);
    rb.AddForce(horizontalSpeed, 0, rollSpeed);
}


/// Will figure out where to move the player horizontally

/// <param name="pixelPos">The position the player has
/// touched/clicked on<
/// <returns>The direction to move in the x axis</returns>
float CalculateMovement(Vector3 pixelPos)
{
    // Converts to a 0 to 1 scale
    var worldPos = Camera.main.ScreenToViewportPoint(pixelPos);
    float xMove = 0;
    // If we press the right side of the screen
    if (worldPos.x < 0.5f)
    {
        xMove = -1;
    }
    else
    {
        // Otherwise we're on the left
        xMove = 1;
    }
    // replace horizontalSpeed with our own value
    return xMove * dodgeSpeed;
}