I need to know how to obtain the x/y position (in mm) from the geometry when I only know the crystal x/y-index. This is needed for calculating some of the trigger cuts for the purpose of applying them to cluster reported by the SSP bank. Since these only provide the x/y-index and do not contain actual CalorimeterHit objects, I am unsure where to look for the information. (Normally these values are calculated for regular clusters by calling cluster.getCalorimeterHits().get(0).getPosition()).