lsst.skymap.detail.utils Namespace Reference

Functions
def	coordFromVec

Variables
list	__all__ = ["coordFromVec"]
tuple	_TinyFloat = numpy.finfo(float)

Function Documentation

def lsst.skymap.detail.utils.coordFromVec	(		vec,
			defRA = None
	)

Convert an ICRS cartesian vector to an ICRS Coord

@param[in] vec: an ICRS catesian vector as a sequence of three floats
@param[in] defRA: the RA to use if the vector is too near a pole (an afwGeom Angle);
            ignored if not near a pole

@throw RuntimeError if vec too near a pole and defRA is None

Definition at line 31 of file utils.py.

def coordFromVec(vec, defRA=None):
    """Convert an ICRS cartesian vector to an ICRS Coord
    
    @param[in] vec: an ICRS catesian vector as a sequence of three floats
    @param[in] defRA: the RA to use if the vector is too near a pole (an afwGeom Angle);
                ignored if not near a pole
    
    @throw RuntimeError if vec too near a pole and defRA is None
    """
    if abs(vec[0]) < _TinyFloat and abs(vec[1]) < _TinyFloat:
        if defRA is None:
            raise RuntimeError("At pole and defRA==None")
        if vec[2] > 0:
            dec = 90.0
        else:
            dec = -90.0
        return afwCoord.makeCoord(afwCoord.ICRS, defRA, afwGeom.Angle(dec, afwGeom.degrees))
    return afwCoord.makeCoord(afwCoord.ICRS, afwGeom.Point3D(*vec))

Variable Documentation

list lsst.skymap.detail.utils.__all__ = ["coordFromVec"]

Definition at line 27 of file utils.py.

tuple lsst.skymap.detail.utils._TinyFloat = numpy.finfo(float)

Definition at line 29 of file utils.py.