Get the angle beetween 2 nodes relative to the horizont.

        Args:
            node (object): The other node.

        Returns:
            rad: The angle

def get_node_angle(self, node):
        """Get the angle beetween 2 nodes relative to the horizont.

        Args:
            node (object): The other node.

        Returns:
            rad: The angle
        """
        return atan2(self.pos[0]-node.pos[0], self.pos[1]-node.pos[1]) - pi / 2