Major Changes
- Use Pattern Recognition in addition to GEANT model to determine which tiles and ribbons to associate with tracks
- This allows us to handle near misses, which is needed to do efficiency studies
- Have information be associated with tracks, instead of having a single big set for the whole event
- This makes using the event display much easier
- This makes getting access to information in Recon root files easier
- Handle track errors correctly
- This wasn't being done before
- This looks nice in the event display
- Sort ACD - track associations by a combined signal size/ distance quality measure instead of using only distance
- This gets rid of problems with shadowing, where one association with a small signal masked another nearby one with a larger signal
- Always calculate gaps to tiles
- Before this was a hodge podge, we had to handle cases where the track hit ribbons, tiles and missed everything differently.
Minor Changes
- Change the way the distance of closest approach is calculated when the POCA occurs exactly at the head of the track
- This effects some events track which graze side tiles (and a very few which graze to tiles), but only when the distances of closest approach is quite large
- Use the hardware veto information instead of the energy information in counting number of tiles hit in the Merit Variables
- This handles issues with the slower timing of the PHA electronics