RichTrackSegment - Set precision on 'angleToDirection' theta and phi values
RichTrackSegment - Allow precision on 'angleToDirection' theta and phi values to be individually specified.
Useful as in general much less precision is required on phi compared to theta (not actually used during the PID determination, as contains no mass hypothesis information). Therefore defaults to a slightly approximate, but twice as fast implementation.
@cattanem Should not impact the PID performance, but some monitoring histograms that include phi information might show diffs.
Edited by Marco Cattaneo