Creates a transformation between the two given references.
the source reference
the destination reference
a transformation instance
Determines if the transformation between the two given references is an identity transformation. This method can be used to check if the (small) overhead of performing identity transformations can be avoided. Typically this is only need when transforming many coordinates in tight loops.
the source reference
the destination reference
true if a non-identity transformation is required for the two given references; false otherwise
A factory for Transformation instances.