/// <summary>
/// Gets a node from a set of coordinates
/// </summary>
/// <param name="worldPosition">Coordinates we want to find a node from</param>
/// <returns></returns>
public Node NodeFromWorldPoint(Vector3 worldPosition)
{
//associates p with the world position of the node
GridPos p = gridTransform.GetGridPos(worldPosition).Clamp(room.width, room.height);
//returns P
return(grid[p.x, p.y]);
}