void OnMouseDown()
{
// if no defender button is selected
if (!Button.selectedDefender)
{
return;
}
// gets the starCost from Defender script
int currStarCost = Button.selectedDefender.GetComponent <Defender>().starCost;
// if currency is less than the cost
if (StarDisplay.GetStarCount() < currStarCost)
{
Debug.Log("Not enough sunlight!!");
return;
}
//deduct the star cost of the current defender
StarDisplay.UseStars(currStarCost);
GameObject defender = Instantiate(Button.selectedDefender, SnapToGrid(CalculateWorldPointOfMouseClick()),
Quaternion.identity) as GameObject;
defender.transform.parent = defenderParent.transform;
}