healpy.pixelfunc.ang2vec¶
- healpy.pixelfunc.ang2vec(theta, phi)¶
ang2vec : convert angles to 3D position vector
Parameters: theta : float, scalar or arry-like
colatitude in radians measured southward from north pole (in [0,pi]).
phi : float, scalar or array-like
longitude in radians measured eastward (in [0, 2*pi]).
Returns: vec : float, array
if theta and phi are vectors, the result is a 2D array with a vector per row otherwise, it is a 1D array of shape (3,)
See also
vec2ang, rotator.dir2vec, rotator.vec2dir