Lock axis

Hi,

I'm doing a camera-only motion using rotation,
However the z-axis moves and I want to set only the z-axis to 0.

But eulerAngle, transform.rotation Of error.

what can I do?

 

The camera is "rolling"?
Because you're probably trying to use Euler angles, when you should be using Quaternions.
Look at the First person MouseLook.cs script in the standard assets for a guide:

float yRot = Input.GetAxis("Mouse X") * XSensitivity;
float xRot = Input.GetAxis("Mouse Y") * YSensitivity;

targetRotation *= Quaternion.Euler (0f, yRot, 0f);
targetRotation *= Quaternion.Euler (-xRot, 0f, 0f);

No roll will occur.