How to use the joystick to control the character

I assume you have read this: http://unity3d.com/support/documentation/ScriptReference/Input.html especially this: http://unity3d.com/support/documentation/ScriptReference/Input.GetAxis.html but if you are asking how do do this with 'touch' on a mobile device? Look in Standard Assets (Mobile) for the joystick controls which put pictures of joystick on screen you can use like the real thing.

Alright after spending the better part of a day and half on trying to build my own joystick in the HUD (screen view canvas), I found this wonderful little bit of information (http://docs.unity3d.com/ScriptReference/Vector3.ClampMagnitude.html). However; applying that to a specific UI object was a tad difficult. Basically you have to define the component you want to move inside your HUD. For me I was trying to move an empty object with an child image to have an on-screen joystick.

The following code is what I got to work with my setup. Hope this helps!

using UnityEngine; using System.Collections;

public class SelectorMovement : MonoBehaviour {

 public RectTransform rt;
 public Vector3 centerPt;
 public float radius;

 void Start (){
     rt = GetComponent<RectTransform> ();
     centerPt = rt.anchoredPosition;
 }

 void Update() {
     Vector3 position = new Vector3 (rt.anchoredPosition.x, rt.anchoredPosition.y, 0);
     Vector3 movement = new Vector3(Input.GetAxis("Horizontal"), Input.GetAxis("Vertical"), 0);
     Vector3 newPos = position + movement;
     Vector3 offset = newPos - centerPt;
     rt.anchoredPosition = centerPt + Vector3.ClampMagnitude(offset, radius);
 }

}