Reference variable on script from another script JAVASCRIPT

Unity Engine
,
1

How do i reference a variable from another script or a script from another script.

This is the script I have with the tree health

#pragma strict

var treeHealth : int = 1;

var logs : Transform;
//var coconut : Transform;
var tree : GameObject;

var speed : int = 8;

function Start()
{
    tree = this.gameObject;
    GetComponent.<Rigidbody>().isKinematic = true;
}

function Update()
{
    if(treeHealth <= 0)
    {
        GetComponent.<Rigidbody>().isKinematic = false;
        GetComponent.<Rigidbody>().AddForce(transform.forward * speed);
        DestroyTree();
    }
}

function DestroyTree()
{
    yield WaitForSeconds(7);
    Destroy(tree);
   
    var position : Vector3 = Vector3(Random.Range(-1.0, 1.0), 0, Random.Range(-1.0, 1.0));
    Instantiate(logs, tree.transform.position + Vector3(0,0,0) + position, Quaternion.identity);
    Instantiate(logs, tree.transform.position + Vector3(2,2,0) + position, Quaternion.identity);
    Instantiate(logs, tree.transform.position + Vector3(5,5,0) + position, Quaternion.identity);
   
    //Instantiate(coconut, tree.transform.position + Vector3(0,0,0) + position, Quaternion.identity);
    //Instantiate(coconut, tree.transform.position + Vector3(2,2,0) + position, Quaternion.identity);
    //Instantiate(coconut, tree.transform.position + Vector3(5,5,0) + position, Quaternion.identity);
   
}

And I want to reduce the health of the tree from another script, this one

#pragma strict

var rayLength : int = 10;

private var playerAnim : PlayerControl;

var tree : GameObject;

var tree : TreeController;

function Update ()
{
    var hit : RaycastHit;
    var fwd = transform.TransformDirection(Vector3.forward)*10;
    Debug.DrawRay (transform.position, fwd, Color.green);
    //Debug.Log("Hit!");

    if(Physics.Raycast(transform.position, fwd, hit, rayLength))
    {
        //Debug.Log("Hit!");
        if(hit.collider.gameObject.tag == "Tree")
        {
            //Debug.Log("Hit!");
            tree = (hit.collider.gameObject);
            playerAnim = GameObject.Find("FPSArms_Axe@Idle").GetComponent(PlayerControl);

            if(Input.GetKeyDown(KeyCode.Return) && playerAnim.canSwing == true)
            {
                tree.GetComponent(TreeController).treeHealth -= 1;
           
                Debug.Log("health");
            }
        }
    }
}

I have tried referencing the health with this code

tree.GetComponent(TreeController).treeHealth -= 1;

but it does not seem to reduce the health, is there another way to reference the script/health.

Thanks

2

Use the generic version of getComponent Unity - Scripting API: GameObject.GetComponent

(Shows you the example in the second part, switch to JS if it’s not already showing)

Also, you didn’t mention, but is your debug even printing?

And…just as a friendly note, UnityScript is dead, not even an option in the newer versions of Unity to create scripts with it. You may want to switch to c# if you can (you’ll also find more help with it).

I would also try to do something with that GameObject.Find as it can be slow.

3

Yes the debug call is working.

Do I need all the code from the generic version, or just the
var hinge: HingeJoint = gameObject.GetComponent(“HingeJoint”) as HingeJoint;
if (hinge != null)
hinge.useSpring = false;
}

Part, I cant seem to get it into my code to work

4

The generic version uses the <> brackets. It’s the second example.

Use the first and check if treeController is null to make sure it’s getting the component.

var treeController: TreeController= tree.GetComponent.<TreeController>();

Similar to what you are doing.

tree.GetComponent.<TreeController>().treeHealth -= 1;

Since the debug is working, are you getting any errors?

5

not getting any errors
with the code you gave, how would i reduce the health?

6

Assuming treeHealth is a public variable,

treeController.treeHealth -= 1; is fine. However, I generally suggest you have a method on the script that you pass “damage” to so it can handle what happens when that health reaches 0 on the object.

Since you aren’t getting any errors. What are you looking at that shows it’s not reducing health?

7

the set up was for the tree to take damage when hit and when the health gets to 0 it would fall
the tree health is shown in the inspector, and when set to 0 it falls
the raycast just doesn’t seem to damage the trees health