Question by DroidDaughter · Jul 22, 2020 at 04:56 AM · public variable passing

Passing a value between scripts for use in an argument?

I'm very much a beginner to object based programming and development through Unity so forgive me if this is extremely easy or has been answered already a million times. I've gone through a handful of questions here and haven't found a solution that's worked yet.

For context, the player can instantiate an object in front of them on left click. I want there to be a finite amount of times the player can do this, like ammo.

Here is the PlayerBehavior script with the simple if statement I want to use to determine if the player can place an object. I don't think PlayerBehavior knows anything in StressSystem exists, so my error in PlayerBehavior is at the if (currentStress > null) statement.

 public class PlayerBehavior : MonoBehaviour
 {
 
     public float speed;
     public GameObject statBlockPrefab;
     public StressSystem StressSystem;
 
     void Start()
     {
     
     }
 
     void Update()
     {
         // WASD to move
         Vector3 inputVector = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
         Rigidbody myRigidBody = GetComponent<Rigidbody>();
         myRigidBody.velocity = inputVector * speed;
 
         Ray rayFromCameraToCursor = Camera.main.ScreenPointToRay(Input.mousePosition);
         Plane playerPlane = new Plane(Vector3.up, transform.position);
         playerPlane.Raycast(rayFromCameraToCursor, out float distanceFromCamera);
         Vector3 cursorPosition = rayFromCameraToCursor.GetPoint(distanceFromCamera);
 
         // Face the new position
         Vector3 lookAtPosition = cursorPosition;
         transform.LookAt(lookAtPosition);
 
         if (Input.GetButtonDown("Fire1"))
         {
             Spawn(cursorPosition);
         }
     }
 
     public void Spawn(Vector3 targetPosition)
     {
         if (currentStress > null);
         {
             GameObject newBlock = Instantiate(statBlockPrefab, transform.position + transform.forward, transform.rotation);
         }
        
         
     }
 }

Next is the StressSystem script which just declares the public floats and starts by saying the current value is equal to the max value.

 public class StressSystem : MonoBehaviour
 {
 
     public float maxStress;
     public float currentStress;
 
     void Start()
     {
         currentStress = maxStress;
     }
 
     void Update()
     {
         //TO DO Tick stress up at a rate
     }
 }

Once I'm finally able to get currentStress passed to the if statement in PlayerBehavior, I want to have the spawn action in PlayerBehavior finish with currentStress -= 1.

I very much would understand if I'm going about this fundamentally weird or inefficient, so I would really appreciate some guidance!

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