convertVectorFromBaseToPupil¶

lsst.cbp.coordUtils.
convertVectorFromBaseToPupil
(vectorBase, pupilAzAlt)¶ Given a vector in base coordinates and the pupil pointing, compute the vector in pupil coordinates.
Parameters:  vectorBase : sequence of 3
float
3dimensional vector in the base frame.
 pupilAzAlt :
lsst.geom.SpherePoint
Pointing of the pupil frame as internal azimuth, altitude.
Returns:  vectorPupil :
np.array
of 3float
3dimensional vector in the pupil frame.
Notes
This could be implemented as the following Euler angle rotation matrix, which is:  first rotate about the z axis by azimuth  then rotate about the rotated y axis by altitude  there is no third rotation
c1*c2 s1 c1*s2 c2*s1 c1 s1s2 s1 0 c2
where angle 1 = azimuth, angle 2 = altitude, sx = sine(angle x) and cx = cosine(angle x).
Knowing this matrix is helpful, e.g. for math inside computeAzAltFromBasePupil.
 vectorBase : sequence of 3