// Tree Chopping - Things you'll need.

// This will check if you hit something by casting a circle in front of you. Variables aren't correct but its something like that
// it'll tell you. Put this in your Player.cs script.
RaycastHit2D ray = Physics2D.CircleCast (transform.position, radius, range);

// Check if you hit a tree and then tell the tree you want to gain a resource by using its GainResource () function.
void OnTriggerEnter2D (Collider col) {
	if (col.tag == "Tree") {
		col.transform.SendMessage ("GainResource");
	}
}

// Your tree will need something like this.
public int totalResource = 5;
int currentResouce;

void Start () {
	currentResource = totalResource;
}

void GainResource () {
	if (currentResource > totalResource) {
   	 	// Get your player here and send them the resource.
		GameObject Player = GameObject.FindGameObjectWithTag ("Player");
		player.GetComponent<ResourceController>().IncreaseWood(1);
	} else {
		DestroyTree();
	}
}

void DestroyTree () {
	Destroy(gameObject);
}