healpy.pixelfunc.ang2vec¶
- healpy.pixelfunc.ang2vec(theta, phi, lonlat=False)¶
ang2vec : convert angles to 3D position vector
- Parameters:
- thetafloat, scalar or arry-like
colatitude in radians measured southward from north pole (in [0,pi]).
- phifloat, scalar or array-like
longitude in radians measured eastward (in [0, 2*pi]).
- lonlatbool
If True, input angles are assumed to be longitude and latitude in degree, otherwise, they are co-latitude and longitude in radians.
- Returns:
- vecfloat, 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