Private module function.
(angle_a, angle_b)
| 124 | return _math.atan2(vector.x, vector.y) % _PI_M_2 |
| 125 | |
| 126 | def _sub(angle_a, angle_b): |
| 127 | 'Private module function.' |
| 128 | diff = abs(angle_a - angle_b) |
| 129 | return _PI_M_2 - diff if diff > _math.pi else diff |
| 130 | |
| 131 | ################################################################################ |
| 132 |