不需要移动时的 Unity 3D 移动

Question

Very new to mono develop and Unity 3d and seem to be having issues with this code. First off, the code IS working. It does what it's supposed to, however, it also does some funky stuff that it's not supposed to. You are able to look up, down, left and right as well as walk those directions, the bad part is though for some reason my character likes to nudge the direction of the mouse when standing still. What am I missing? More efficient/less buggy way of doing this?

public class PlayerControl : MonoBehaviour {

    public float WALK_SPEED = 1.3f;
    public float RUN_SPEED = 4.0f;
    public float STRAFE_SPEED = 5.0f;
    public float ROTATION_SPEED = 300.0f;
    public float JUMP_FORCE = 250.0f;   
    void Start()
    {
    }
    // Update is called once per frame

    void Update () 
    {
        float movementSpeed = WALK_SPEED;
        float strafeSpeed = STRAFE_SPEED;
        float rotationSpeedx = ROTATION_SPEED;
        float rotationSpeedy = ROTATION_SPEED;

        if (Input.GetKey(KeyCode.LeftShift))
        {
            movementSpeed = RUN_SPEED;
        }

        movementSpeed = Input.GetAxis("Vertical")  * movementSpeed * Time.deltaTime;
        strafeSpeed = Input.GetAxis("Horizontal")  * strafeSpeed * Time.deltaTime;
        rotationSpeedx = Input.GetAxis("Mouse X") * rotationSpeedx * Time.deltaTime;
        rotationSpeedy = Input.GetAxis("Mouse Y") * rotationSpeedy * Time.deltaTime;

        Vector3 rotate = new Vector3 (-rotationSpeedy, rotationSpeedx, 0);

        transform.Translate(Vector3.forward * movementSpeed);
        transform.Translate(Vector3.right * strafeSpeed);
        transform.Rotate(rotate);

        if (Input.GetKeyDown(KeyCode.Space) &&
            transform.position.y < 30) 
        {
            rigidbody.AddForce(Vector3.up * JUMP_FORCE);
        }
    }
}

Answer 1

Try freezing rotation constraints on rigidbody component. This may stop the nudging.