euler2mat

Import in python using from mcot.core.spherical import euler2mat

mcot.core.spherical.euler2mat(phi, theta, psi)

Computes a rotation matrix based on the Euler angles

The z-axis is mapped to: euler2mat(phi, theta, _).dot([0, 0, 1] = (cos(phi) * sin(theta), sin(phi) * sin(theta), cos(theta)) psi determines the x- and y-axes orientations in the plane perpendicular to this

Bingham matrix is assumed to initially point in the z-direction

Parameters:

• phi – orientation of the z-axis projection on the x-y plane
• theta – polar angle (0 for keeping the z-axis in the z-direction, pi/2 for projecting the z-axis onto the x-y plane)
• psi – rotation of the major dispersion axis around the main fibre orientation

Returns:

(…, 3, 3) array with rotation matrix