,The object rotates in z axis unwantedly

Questions & Answers
1

this is my code. I want to rotate the object in this way: press a buttom and the object rotate in the given axis but thre is a problem. when I rotate it in both Y and X it unwantedly rotates in z too I cant find any reason for this (I want something like rotating a first person camera but in this way) here is my code

using UnityEngine;
using System.Collections;
public class sss : MonoBehaviour {

public float turnSpeed = 90;
void Update () {

    if (Input.GetKeyDown(KeyCode.LeftArrow))
        transform.Rotate(Vector3.up, -turnSpeed, Space.World);

    if (Input.GetKeyDown(KeyCode.RightArrow))
        transform.Rotate(Vector3.up, turnSpeed, Space.World);

    if (Input.GetKeyDown(KeyCode.UpArrow))
        transform.Rotate(Vector3.right, turnSpeed, Space.World);

    if (Input.GetKeyDown(KeyCode.DownArrow))
        transform.Rotate(Vector3.right, -turnSpeed, Space.World);

}

}

2

If you don’t ever need it to move on the Z axis, you could always put a RigidBody component on the GameObject and freeze rotation along the Z axis.

3

Your code is correct but you’re actually rotating it freely in all directions:

private float velocityX, velocityY;
public float maxX = 90f;
public float maxY = 45f;

public float turnSpeed = 3f;

void Update () {
		if(Input.GetKeyDown (KeyCode.LeftArrow)) {
                    velocityX += turnSpeed;
            }
            if(Input.GetKeyDown (KeyCode.RightArrow)) {
                    velocityX -= turnSpeed;
            }
            if(Input.GetKeyDown (KeyCode.UpArrow)) {
                    velocityY -= turnSpeed;
            }
            if(Input.GetKeyDown (KeyCode.DownArrow)) {
                    velocityY += turnSpeed;
            }

		//clamp values
		if (velocityX > 360) {
			velocityX -= 360;
		}
		if (velocityX < -360) {
			velocityX += 360;
		}
		if (velocityY > 360) {
			velocityY -= 360;
		}
		if (velocityY < -360) {
			velocityY += 360;
		}

		velocityX = Mathf.Clamp (velocityX, -maxX, maxX);
		velocityY = Mathf.Clamp (velocityY, -maxY, maxY);

		transform.rotation = Quaternion.Euler (velocityY, velocityX, 0);
}