call function at a time interval within update

Questions & Answers
1

When i click and hold the mouse, it is supposed to show me the GameObject’s position where my mouse is pointing at (while clicked) at a repeat rate of 1.

However, what I am getting is the debug.log is being called several times (70+) even if i clicked once!

bool Activate = false;

void FixedUpdate(){
	StartCoroutine (testing (1.0f));
}

IEnumerator testing(float waitTime) {
	Activate = true;
	yield return new WaitForSeconds (waitTime);
	if (Input.GetMouseButton (0)) {
		RaycastHit2D hit = Physics2D.Raycast (Camera.main.ScreenToWorldPoint (Input.mousePosition), Vector2.zero);

		if (hit.collider != null) {
			Debug.Log (hit.transform.position.ToString ());
		}

		Activate = false;
	}
}
2

I think you’re calling your Coroutine every time your physics refresh because it’s being called in FixedUpdate. Try calling your coroutine only once via Start.

3

Im not sure why you need the additional timer. Fixed update is a timer itself.

	float timer;
	void FixedUpdate () {
		timer += Time.deltaTime;
        if (timer > 1) { timer -= 1;
        if (Input.GetMouseButton (0)) {
						print ("one second passed....raycast here");}
				}
	
	}
4

@Fr33zerPop is right, you are starting a new coroutine several times by frame. If you want use a coroutine for this, you should initialize one time in Start or more complicated like this

   Coroutine _showGameObjectPosition;
    
    void Update(){
        
        if (Input.GetMouseButtonDown (0)) _showGameObjectPosition = StartCoroutine (testing (1.0f));
        if (Input.GetMouseButtonUp (0)) StopCoroutine (_showGameObjectPosition);
    }
    
    IEnumerator testing(float waitTime)
    {
        var wait = new WaitForSeconds(waitTime);
        
        while(true) {
            
            RaycastHit2D hit = Physics2D.Raycast (Camera.main.ScreenToWorldPoint (Input.mousePosition), Vector2.zero);
            
            if (hit.collider != null) {
                Debug.Log (hit.transform.position.ToString ());
            }
            
            yield return wait;          
        }
    }

But if is only a timer i recommend the method that show @toddisarockstar