cap_distance¶
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pydl.pydlutils.mangle.
cap_distance
(x, cm, points)[source]¶ Compute the distance from a point to a cap, and also determine whether the point is inside or outside the cap.
Parameters: X
value of the cap (3-vector).CM
value of the cap.If
points
is a 3-vector, or set of 3-vectors, then assume the point is a Cartesian unit vector. Ifpoint
is a 2-vector or set of 2-vectors, assume the point is RA, Dec.Returns: The distance(s) to the point(s) in degrees. If the distance is negative, the point is outside the cap.