Camera movement

Hi,the code below will move the camera on the z and x axis only if the rotation of the camera is 0,however
my camera is at a angle( x 30) and when moved along the z axis the camera also moves along the y axis because of the angle.
Could you tell me how to move the camera along the z axis only with the camera at a angle as the angle is needed for my game but not the y movement when moved along the z axis.

Code (csharp):

1.  
2. public class DragCamera : MonoBehaviour {
3.  
4.     public float speed = 10.0f;
5.     // Use this for initialization
6.     void Start () {
7.    
8.     }
9.    
10.     // Update is called once per frame
11.     void Update () {
12.    
13.     Vector3 dir = new Vector3();   //create 0,0,0
14.    
15.     if(Input.GetKey(KeyCode.W))dir.z += 1.0f;
16.     if(Input.GetKey(KeyCode.W))dir.y += 0;  //test restrict y movement does not work
17.    
18.     if(Input.GetKey(KeyCode.S))dir.z -= 1.0f;
19.     if(Input.GetKey(KeyCode.S))dir.y -= 0; //test restrict y movement does not work
20.    
21.     if(Input.GetKey(KeyCode.A))dir.x -= 1.0f;
22.     if(Input.GetKey(KeyCode.D))dir.x += 1.0f;
23.    
24.     dir.Normalize();
25.    
26.     transform.Translate(dir * speed * Time.deltaTime);
27.    
28.     }//end update
29.  
30.  

 

Currently you're moving the camera relative to itself, so its Z-axis is wherever the camera is pointing. You want to move it relative to the world, where the Z-axis is always the same. Change the last line to this:

Code (csharp):

1. transform.Translate(dir *speed*Time.deltaTime, Space.World);

 

Thats works perfect, thx v.much,
also I would like to limit the movement to just the map so which method would be best
to limit the movement on the x and z axis?

 

Basic Camera movement complete,
and again thx v.much for the help

Code (csharp):

1.  
2.  
3. public float speed = 10.0f;
4.     // Use this for initialization
5.     void Start () {
6.    
7.     }
8.    
9.     // Update is called once per frame
10.     void Update () {
11.    
12.     Vector3 dir = new Vector3();   //create 0,0,0
13.    
14.     if(transform.position.z < 33f){
15.     if(Input.GetKey(KeyCode.W))dir.z += 1.0f;
16.     }
17.     if(transform.position.z > -5f){
18.     if(Input.GetKey(KeyCode.S))dir.z -= 1.0f;
19.     }
20.     if(transform.position.x > 0f){
21.     if(Input.GetKey(KeyCode.A))dir.x -= 1.0f;
22.     }
23.     if(transform.position.x < 50f){
24.     if(Input.GetKey(KeyCode.D))dir.x += 1.0f;
25.     }
26.    
27.     dir.Normalize();
28.    
29.     transform.Translate(dir * speed * Time.deltaTime, Space.World);
30.    
31.     }//end update
32.    
33.  
34. }
35.  
36.