healpy.rotator.rotateDirection¶

healpy.rotator.rotateDirection(rotmat, theta, phi=None, do_rot=True, lonlat=False)¶

Rotate the vector described by angles theta,phi using the rotation matrix given as first argument.

Parameters:

rotmatfloat, array-like shape (3,3): The rotation matrix
thetafloat, scalar or array-like: The angle theta (scalar or shape (N,)) or both angles (scalar or shape (2, N)) if phi is not given.
phifloat, scalar or array-like, optionnal: The angle phi (scalar or shape (N,)).
do_rotbool, optional: if True, really perform the operation, if False do nothing.
lonlatbool: If True, input angles are assumed to be longitude and latitude in degree, otherwise, they are co-latitude and longitude in radians.

Returns:

healpy