openalea.phenomenal.calibration.transformations.angle_between_vectors
- openalea.phenomenal.calibration.transformations.angle_between_vectors(v0, v1, directed=True, axis=0)[source]
Return angle between vectors.
If directed is False, the input vectors are interpreted as undirected axes, i.e. the maximum angle is pi/2.
>>> a = angle_between_vectors([1, -2, 3], [-1, 2, -3]) >>> numpy.allclose(a, math.pi) True >>> a = angle_between_vectors([1, -2, 3], [-1, 2, -3], directed=False) >>> numpy.allclose(a, 0) True >>> v0 = [[2, 0, 0, 2], [0, 2, 0, 2], [0, 0, 2, 2]] >>> v1 = [[3], [0], [0]] >>> a = angle_between_vectors(v0, v1) >>> numpy.allclose(a, [0, 1.5708, 1.5708, 0.95532]) True >>> v0 = [[2, 0, 0], [2, 0, 0], [0, 2, 0], [2, 0, 0]] >>> v1 = [[0, 3, 0], [0, 0, 3], [0, 0, 3], [3, 3, 3]] >>> a = angle_between_vectors(v0, v1, axis=1) >>> numpy.allclose(a, [1.5708, 1.5708, 1.5708, 0.95532]) True