
                     PURPOSE
The event generator is suitable for generating events
of the the reaction    e p -> e' p' pi+ pi-
in the Q2 range 0.1-5.0 GeV and in W range from threshold
to ~ 3. GeV. It probably work in wider range but the
correspondence with the experimental data will be worse.




                     PROGRAM STRUCTURE
 SOURCE FILES
   sorce files are in the directory genev. They are:
   bcs.inc com_xinter.inc corrfact.inc 
   genev.f interpol.f corrfact.f kinema3.f radcor.f
 MAKEFILE is  Makefile. 
   It is vesry simplified. Adjust it as needed.
 DATA FILES read in at the execution
   data files are in the directory data3
 ENVIRONMENT VARIABLES
   genev uses one environment variable "GENEV_DATA_DIR"
   Its value is the path to the data file directory (.../data3) 
 INPUT
   genev.inp seed.dat
 OUTPUT
   GENEVOUT.BOS


                         COMPILATION
Run make. If necessary adjust the Makefile.
Cernlibs and Claslibs are needed.


                          RUNNING
Set the environment variable GENEV_DATA_DIR.
Run the executable genev_Linux.
During the execution the program reads input files 
genev.inp and seed.dat from the current directory.
Then it reads data files from the dir. pointed to
by GENEV_DATA_DIR. (it takes a while)


                          INPUT
-The input file genev.inp has a lot of settings, You need to
 set only few of parameters:
   BOS file name - the name of a bos output file
   The number of events - the The number of events in the output file.
   Ebeam - Beam energy
   Q2min, Q2max - the Q2 range
   Wmin, Wmax   - the W range
   Target radius, length and offset - the target size and position
      with respect to center of coordinates
   You probably woun't need to change setting of other parameters.
-The input file seed.dat contains a seed for random number genaration


                          OUTPUT
The output file GENEVOUT.BOS contains MCTK banks in bos format.
It serves an input for CLAS GSIM.
