rotator – Rotation and geometry functions

Rotation

Rotator([rot, coord, inv, deg, eulertype])	Rotation operator, including astronomical coordinate systems.
rotateVector(rotmat, vec[, vy, vz, do_rot])	Rotate a vector (or a list of vectors) using the rotation matrix given as first argument.
rotateDirection(rotmat, theta[, phi, ...])	Rotate the vector described by angles theta,phi using the rotation matrix given as first argument.

Geometrical helpers

vec2dir(vec[, vy, vz, lonlat])	Transform a vector to angle given by theta,phi.
dir2vec(theta[, phi, lonlat])	Transform a direction theta,phi to a unit vector.
angdist(dir1, dir2[, lonlat])	Returns the angular distance between dir1 and dir2.