c
c
c     ###################################################
c     ##  COPYRIGHT (C)  1992  by  Jay William Ponder  ##
c     ##              All Rights Reserved              ##
c     ###################################################
c
c     ################################################################
c     ##                                                            ##
c     ##  piorbs.i  --  conjugated system in the current structure  ##
c     ##                                                            ##
c     ################################################################
c
c
c     norbit    total number of pisystem orbitals in the system
c     iorbit    numbers of the atoms containing pisystem orbitals
c     reorbit   number of evaluations between orbital updates
c     nconj     total number of separate conjugated piystems
c     kconj     contiguous list of atoms in each pisystem
c     iconj     first and last atom of each pisystem in the list
c     piperp    atoms defining a normal plane to each orbital
c     nbpi      total number of bonds affected by the pisystem
c     ibpi      bond and piatom numbers for each pisystem bond
c     ntpi      total number of torsions affected by the pisystem
c     itpi      torsion and pibond numbers for each pisystem torsion
c     listpi    atom list indicating whether each atom has an orbital
c
c
      integer norbit,iorbit
      integer reorbit,nconj
      integer kconj,iconj
      integer piperp
      integer nbpi,ibpi
      integer ntpi,itpi
      logical listpi
      common /piorbs/ norbit,iorbit(maxatm),reorbit,nconj,kconj(maxatm),
     &                iconj(2,maxatm),piperp(3,maxatm),nbpi,
     &                ibpi(3,maxbnd),ntpi,itpi(2,maxtors),listpi(maxatm)