add PDG to CORSIKA id conversion

something like Code pdg2corsika( int pdgId )

will be needed for #54 (closed) and probably for many other external codes.

mentioned in issue #126 (closed)

Yes, sure. This is part of the interface to e.g. Pythia.

assigned to @mreininghaus

Any proposals for this? I wanted to start to include Pythia, and then we need this conversion.

I would suggest a conversion table for PDG IDs < 1000 and a std::map for everything above. This ensures a fast conversion for the most common particles while not wasting too much memory.

...since you assigned yourself to this task: are you planning to provide a solution in the next days? This is a blocker for a few other things. Otherwise, I would look into this.

OK, I'll give it priority.

mentioned in merge request !74 (merged)

created merge request !74 (merged) to address this issue

How do we handle generic nuclei codes

$\pm10LZZZAAAI$

?

I am not sure if this will ever be relevant. At least for PYTHIA right now nuclei are not interesting, in particular not for decays.

But I think the conversion is very simple. All generic nuclei are Code::Nucleus this is super-generic. Of course when you want to do something reasonable with Nucleus you will have to read/write A, Z etc. explicitly in your respective particle data code. But this should always be possible. We probably need a few extra "converter tool functions" like "unsigned int GetMassNumberFromPDG(PDGCode c) {return c/10%1000; } etc.

closed via merge request !74 (merged)

mentioned in commit 7a2ba843