//set a parent platform and node to this tower when it's build on a walkable platform
public void SetPlatform(Platform platform, Node node)
{
occupiedPlatform=new OccupiedPlatform(platform, node);
}
//call when the tower is sold or destroy
public void Destroy()
{
if(onDestroyE!=null) onDestroyE(this);
//tells platform to reactivate node if platform is walkable
if(occupiedPlatform!=null){
//Debug.Log("clear attached platform");
occupiedPlatform.platform.UnBuild(occupiedPlatform.node);
occupiedPlatform=null;
}
//else Debug.Log("no platform attached");
//tells gamecontrol to refund the tower
//thisObj.SetActiveRecursively(false);
Destroy(thisObj);
}