yt.utilities.math_utils.
rotate_vector_3D
(a, dim, angle)[source]¶Rotates the elements of an array around an axis by some angle.
Given an array of 3D vectors a, this rotates them around a coordinate axis by a clockwise angle. An alternative way to think about it is the coordinate axes are rotated counterclockwise, which changes the directions of the vectors accordingly.
Parameters: | a : array
dim : integer
angle : float
|
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Examples
>>> a = np.array([[1, 1, 0], [1, 0, 1], [0, 1, 1], [1, 1, 1], [3, 4, 5]])
>>> b = rotate_vector_3D(a, 2, np.pi/2)
>>> print b
[[ 1.00000000e+00 -1.00000000e+00 0.00000000e+00]
[ 6.12323400e-17 -1.00000000e+00 1.00000000e+00]
[ 1.00000000e+00 6.12323400e-17 1.00000000e+00]
[ 1.00000000e+00 -1.00000000e+00 1.00000000e+00]
[ 4.00000000e+00 -3.00000000e+00 5.00000000e+00]]