c# - Unity 3D, 6.0 ver. Mouse rotation is inverted when TiltRotation is done - Stack Overflow

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Can somebody tell me what am I doing wrong? Whenever I tilt my object left or right on Z axis (it has rigidbody) my mouse look is inverted until Z axis is 0 again. Two scripts are seperate but on the same empty object.

My TiltMovement

    void TiltMovement()
    {
        float tiltRight = Input.GetKey(GameManager.Instance.InputManager.GetKey("TiltRight")) ? 1 : Input.GetKey(GameManager.Instance.InputManager.GetKey("TiltLeft")) ? -1 : 0;

    if (tiltRight != 0)
    {
        // Calculate the rotation amount based on the tilt input
        float tiltAmount = tiltRight * tiltSpeed * Time.deltaTime;

        // Apply Z-axis rotation in local space
        transform.Rotate(Vector3.forward, -tiltAmount, Space.Self);
    }

My Mouse Look

void HandleMouseLook()
{
    float mouseX = Input.GetAxis("Mouse X") * lookSpeed * Time.deltaTime;
    float mouseY = Input.GetAxis("Mouse Y") * lookSpeed * Time.deltaTime;

    targetMouseDelta = new Vector2(mouseX, mouseY);
    currentMouseDelta = Vector2.Lerp(currentMouseDelta, targetMouseDelta, smoothFactor * Time.deltaTime);

    rotationY += currentMouseDelta.x;
    rotationX -= currentMouseDelta.y;
    rotationX = Mathf.Clamp(rotationX, -clampAngle, clampAngle);

    // Apply rotations in local space
    transform.Rotate(Vector3.up, rotationY, Space.Self); // Rotate around local Y axis
    transform.Rotate(Vector3.right, rotationX, Space.Self); // Rotate around local X axis
}

Well, I tried just getting rid of the rolling but it won't satisfy me, because it's a space game (first person).

Can somebody tell me what am I doing wrong? Whenever I tilt my object left or right on Z axis (it has rigidbody) my mouse look is inverted until Z axis is 0 again. Two scripts are seperate but on the same empty object.

My TiltMovement

    void TiltMovement()
    {
        float tiltRight = Input.GetKey(GameManager.Instance.InputManager.GetKey("TiltRight")) ? 1 : Input.GetKey(GameManager.Instance.InputManager.GetKey("TiltLeft")) ? -1 : 0;

    if (tiltRight != 0)
    {
        // Calculate the rotation amount based on the tilt input
        float tiltAmount = tiltRight * tiltSpeed * Time.deltaTime;

        // Apply Z-axis rotation in local space
        transform.Rotate(Vector3.forward, -tiltAmount, Space.Self);
    }

My Mouse Look

void HandleMouseLook()
{
    float mouseX = Input.GetAxis("Mouse X") * lookSpeed * Time.deltaTime;
    float mouseY = Input.GetAxis("Mouse Y") * lookSpeed * Time.deltaTime;

    targetMouseDelta = new Vector2(mouseX, mouseY);
    currentMouseDelta = Vector2.Lerp(currentMouseDelta, targetMouseDelta, smoothFactor * Time.deltaTime);

    rotationY += currentMouseDelta.x;
    rotationX -= currentMouseDelta.y;
    rotationX = Mathf.Clamp(rotationX, -clampAngle, clampAngle);

    // Apply rotations in local space
    transform.Rotate(Vector3.up, rotationY, Space.Self); // Rotate around local Y axis
    transform.Rotate(Vector3.right, rotationX, Space.Self); // Rotate around local X axis
}

Well, I tried just getting rid of the rolling but it won't satisfy me, because it's a space game (first person).

• c#
• unity-game-engine

Share Improve this question Follow asked Feb 24 at 12:57 Patryk Patek2 WaraksaPatryk Patek2 Waraksa 2111 silver badge11 bronze badge

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1 Answer 1

Sorted by: Reset to default 0

Rotating on Z (roll) affects the object's local X and Y axes. When you roll (tilt on the Z-axis), your local right (Vector3.right) and up (Vector3.up) directions change. This makes your mouse look behave unexpectedly because it's based on local axes, which are no longer aligned with world space. Mouse look rotates in local space, so when tilted, X and Y behave differently. It is better to use Quaternions instead of separate euler rotations.

    Quaternion currentRotation = transform.rotation;

    // Apply rotation based on world space (avoiding local axis issues)
    Quaternion yRotation = Quaternion.Euler(0, rotationY, 0); // Yaw (left-right)
    Quaternion xRotation = Quaternion.Euler(rotationX, 0, 0); // Pitch (up-down)

    // Apply new rotation while preserving Z-axis roll
    transform.rotation = yRotation * currentRotation * xRotation;

Instead of applying Rotate() separately for each axis, this creates a single new rotation using quaternions. Please reply to this comment for further queries I will try my best to help. And Notify me if the problem has been solved I will be grateful. I apologize in advance if I was unable to understand the scenario to maximum detail.

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