[Rich] common simulation code

[Maurizio Ungaro]

Hi all,

I think it's important to keep the repository up to date and common for everybody. 
Here's how we can do this:

1. GEOMETRY. you can get the geometry with:

 svn co https://clas12svn.jlab.org/repos/trunk/clas12/gemc/production/database_io/clas12/geo/rich

I urge you to keep this directory up-to-date, so we can all use the latest. 

You can commit changes here by using 

svn commit 

make sure you are in the rich directory.
Please send msg to rich mailing list when you update it, so everybody is aware of the changes.

The way it's done, you can add multiple versions of the geometry in case Marco, Luciano, Ahmed test different ones.


2. MATERIALS.  This file, Mmaterials.cc, can be changed as well, and modifications can be committed freely. 
I suggest you first make sure you have the latest version, then apply your changes and commit right away.


3. Detector Construction, SteppingAction, etc.
These are more delicate. I believe that everything is useful to everybody. If you have some changes you like to implement in the gemc repository, please send them to me.

Let me know if you  have other ideas. I really want everybody to collaborate on this.


best regards.
mauri