to_matrix

Specification

Location	Author	Maintained by
isl/math/quaternion.py	Kenny Erleben	DIKU

Purpose & Params

Converts an euler rotation matrix to a quaternion.

Example

    import numpy as np
    # Cosider the case where we want to convert a quaternion to a euler 
    # rotation matrix, that rotates 90 degrees on the x-axis
    radian    = (0.5 * np.pi)/2
    q         = np.array([np.cos(radian), np.sin(radian), 0, 0])
    print(quat.to_matrix(q))

output:

   [[ 1.00000000e+00  0.00000000e+00  0.00000000e+00]
    [ 0.00000000e+00  2.22044605e-16 -1.00000000e+00]
    [ 0.00000000e+00  1.00000000e+00  2.22044605e-16]]