Parameters: |
- x :
ndarray or recarray
X value of the cap (3-vector).
- cm :
ndarray or recarray
CM value of the cap.
- points :
ndarray or recarray
If points is a 3-vector, or set of 3-vectors, then assume the point
is a Cartesian unit vector. If point is a 2-vector or set
of 2-vectors, assume the point is RA, Dec.
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