def __init__(self, desiredTransformation):
self.rotationMatrix=_rotationMatrixMap[desiredTransformation]<EOL>self.transformationStrings=_transformationStringMap[desiredTransformation]<EOL>
Class constructor/initializer. Sets the type of transformation to be used.

Parameters
----------

desiredTransformation - The kind of coordinate transformation that should be provided. For example
Transformations.GAL2ECL