Difference: MathCore (6 vs. 7)

Revision 72005-10-18 - PatrickSKoppenburg

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META TOPICPARENT name="LHCbPhysicsEventModelTaskForce"

LHCb Physics Event Model Comments on the MathCore Vector and the Root Linear Algebra Classes

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MathCore Vector Classes

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  Although they have a little complicated structure (many templates and typedefs) which makes it sometimes difficult to know which class one is actually using, the MathCore Vector Classes are quite well designed. Also the classes have sometimes silly names (XYZTVector for instance), which we suggest to hide behind an additional layer of typedefs.
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  • There is an Eta() method in the LorentzVector, but no Gamma() and Beta().

Root Linear Algebra Classes

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  • All classes are TObjects, which pulls the whole of ROOT into our event model. Is that necessary?
  • Internally there are exported typedefs like Assert which overwrites the Assert method in GaudiTool.
 
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