C#•3y ago

Update Variable Between Scripts

Hey there, this isnt my first time updating between scripts so I dont entirely know the issue. I have two scripts, 'GunController' (with the variable: 'public bool canFire;') in which I am trying to update in the script 'BulletController' in theory i have the canfire updated in the start() of bulletcontroller for when the prefab spawns to make the bool false and then when the object gets destroyed, it is then set to true i will simplify the code to the main parts to make it obvious BULLETCONTROLLER:

 GunController gunScript;
    // Start is called before the first frame update
    void Start()
    {
        reelBack = GameObject.FindGameObjectWithTag("POINT");
        m_Rigidbody = GetComponent<Rigidbody>();
        gunScript.canFire = false;
    }

    // Update is called once per frame
    void Update()
    {
        freezeTime -= Time.deltaTime;   //new
        if (freezeTime <= 0)
        {
            m_Rigidbody.constraints = RigidbodyConstraints.FreezePositionZ | RigidbodyConstraints.FreezeRotationZ;
            bulletFreeze -= Time.deltaTime;
            if (bulletFreeze <= 0)
            {
                Destroy(gameObject, .2f);
                transform.LookAt(reelBack.transform);
                transform.position += transform.forward * 100*Time.deltaTime;
                gunScript.canFire = true;
            }
        }
        if (freezeTime > 0)
        {
            transform.Translate(Vector3.up * shootSpeed * Time.deltaTime);
            
        }

 GunController gunScript;
    // Start is called before the first frame update
    void Start()
    {
        reelBack = GameObject.FindGameObjectWithTag("POINT");
        m_Rigidbody = GetComponent<Rigidbody>();
        gunScript.canFire = false;
    }

    // Update is called once per frame
    void Update()
    {
        freezeTime -= Time.deltaTime;   //new
        if (freezeTime <= 0)
        {
            m_Rigidbody.constraints = RigidbodyConstraints.FreezePositionZ | RigidbodyConstraints.FreezeRotationZ;
            bulletFreeze -= Time.deltaTime;
            if (bulletFreeze <= 0)
            {
                Destroy(gameObject, .2f);
                transform.LookAt(reelBack.transform);
                transform.position += transform.forward * 100*Time.deltaTime;
                gunScript.canFire = true;
            }
        }
        if (freezeTime > 0)
        {
            transform.Translate(Vector3.up * shootSpeed * Time.deltaTime);
            
        }

27 Replies

Kouhai•3y ago

What issue(s) are you having?

c_cccOP•3y ago

so currently nothing is happening the bullet spawns, canFire does not update within the gun (despite being in the start function) the bullet despawns, canFire doesnt update

c_cccOP•3y ago

c_cccOP•3y ago

hoggy077•3y ago

your gunscript isn't assigned by the looks

Kouhai•3y ago

Okay, in your update loop you set canFire to true if both freezetime and bulletFreeze are less than 0, right?

c_cccOP•3y ago

and just so u are aware of what the entire script does:

c_cccOP•3y ago

yeah thats what im attempting to do in my mind currently, if its under start(), canfire should be false and when freeztime and bulletfreeze are both 0 and the prefab begins to destroy, canfire should be true 'GunController gunScript;' is that not fully assigning?

hoggy077•3y ago

Unfortunately no Since Gun controller (im assuming) is on your gun for your character, its an instance per say. So to access it you would need to assign it cause its essentially like any normal class, you can have a variable for it, but unless you assign it your code wont know what or where to change anything

c_cccOP•3y ago

ah u see originally when ive done it in the past i would assign it as if it were a game object but because the prefab doesnt currently exist if i public the gunScript

c_cccOP•3y ago

c_cccOP•3y ago

i cant drag the controller in is there a way to assign it properly through code would get component work>?

hoggy077•3y ago

get component would work, but you would need a reference to the game object with your GunController script on it

Kouhai•3y ago

if gunScript wasn't set, it would've thrown a NullReferenceException

c_cccOP•3y ago

it did i double checked on both lines

hoggy077•3y ago

additionally, if you dont want a reference to your gameobject (or to get it using some other method like FindGameObjectWithTag) you could use FindObjectOfType and use typeof(GunController)

c_cccOP•3y ago

sorry, didnt clarify

Kouhai•3y ago

Ok, if it's does thrown NullReference, then follow what hoggy077 is saying 👍 Ik it's pedantic 😅 But I would personally recommend using the generic version FindObjectOfType<T> instead of typeof

hoggy077•3y ago

actually do that one that way you dont need to cast the result

c_cccOP•3y ago

hmm as in like this

c_cccOP•3y ago

hoggy077•3y ago

add () on the end FindObjectOfType is a function

c_cccOP•3y ago

AH U LEGENDS thank you so much

hoggy077•3y ago

been a while, but you might also be able to call it without GameObject. but i may be wrong

c_cccOP•3y ago

that was way more difficult because of the prefab normally i just drag and drop whatever it is through public i didnt know how to do it like that thank you guys

hoggy077•3y ago

all good

c_cccOP•3y ago

<3 have a good day

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Update Variable Between Scripts