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Question by muzkie · May 02, 2016 at 02:58 PM · transform.translatemathf.clamp

Limiting the movement of a player object moved by transform.translate (Unity 5)

Hi! I'm completely new to Unity and I am trying to limit the movement of my object.

I am using transform.translate to move my player object and so far it's working great. But I would want to limit its movement to -8 and 8 in the x-axis so that it won't go out of the bounds.

Here is my code:

 public float mspeed = 10f;
 private Vector3 movement = new Vector3 (5f, 0f, 0f);
 
     void Start()
     {
     }
 
     void Update ()
     {
         PlayerController ();
 
     }
 
     void PlayerController()
     {
 
 
         if (Input.GetKey(KeyCode.D))
         {
             transform.Translate (movement * mspeed * Time.deltaTime);
         }
 
         if (Input.GetKey(KeyCode.A))
         {
             transform.Translate (-movement * mspeed * Time.deltaTime);
         }
     }


I heard it's possible thru mathf.clamp but i don't know how to implement it on a transform.translate so I'm basically lost.

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avatar image Cherno · May 02, 2016 at 03:44 PM 1
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$$anonymous$$athf.Clamp works with one float or int. Transform.position is a Vector3, which consists of three floats. Thus, you just need to use Clamp after transform.Translate to limit the x value of the transform.position Vector3.

 transform.Translate (movement * mspeed * Time.deltaTime);
 transform.position = new Vector3($$anonymous$$athf.Clamp(transform.position.x, -8, 8), transform.position.y, transform.position.z);

or

 transform.Translate (movement * mspeed * Time.deltaTime);
 Vector3 pos = transform.position;
 pos.x = $$anonymous$$athf.Clamp(pos .x, -8, 8);
 transform.position = pos;

The Scripting API has this exact example.

avatar image muzkie Cherno · May 04, 2016 at 05:41 AM 0
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Worked liked a charm, thank you.

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