*
* $Id$
*
* $Log$
* Revision 1.1  2000/06/19 20:00:25  eugenio
* Initial revision
*
* Revision 1.1  1994/10/07  23:57:40  zfiles
* New include files for QQ.
*
*
*CMZ :  1.02/61 04/10/94  17.22.38  by  Paul Avery
*CMZ :  1.03/70 15/10/93  08.44.26  by  Paul Avery
*CMZ :          08/10/93  16.00.06  by  Paul Avery
*>> Author :
* 14/10/96 Lynn Garren: Change XVTX, TVTX, RVTX from real to double precision.
*
*  >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
*                         QQVRTX.INC
*
*                       QQ vertex list
*  >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

C   Contains a list of vertices. When a particle decays, is absorbed
C   or converts to e+e- a new vertex is created. Various pointers
C   relate the vertex list to the full particle list in QQTRAK.INC.
C
C   VPROD(IT) is the vertex at which particle IT was produced while
C   IVDECA(IT) is the vertex at which particle IT either decayed, was
C   absorbed or converted, or 0 if nothing happened. Conversely,
C   ITRKIN(IV) is the incoming track to vertex IV or 0 if IV = 1 (the
C   production vertex has no incoming track). ITRKOU(IV) is the first
C   outgoing track from vertex IV or 0 if the track is absorbed.
C  >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>-
C
*  NVRTX      # vertices
*  XVTX       X,Y,Z of vertex in meters
*  TVTX       T of vertex in meters
*  RVTX       SQRT(X**2 + Y**2)
*  ITRKIN     Pos. in track list of incoming trk
*  NTRKOU     # outgoing tracks
*  ITRKOU     Position in track list of 1st outgoing track
*  IVKODE     (1=decay, 2=absorbed, 3=photon conv.)


      INTEGER NVRTX
      COMMON/QQVRT1/
     *   NVRTX


      DOUBLE PRECISION XVTX, TVTX, RVTX

      INTEGER ITRKIN, NTRKOU, ITRKOU, IVKODE
      COMMON/QQVRT2/
     *   XVTX(MCVRTX,3), TVTX(MCVRTX), RVTX(MCVRTX),
     *   ITRKIN(MCVRTX), NTRKOU(MCVRTX), ITRKOU(MCVRTX),
     *   IVKODE(MCVRTX)
C