+ chi2=0.0
+ chip2=0.0
+ chis2=0.0
+! chis2 = chis(itypj,itypi)
+ chis12 = chis1 * chis2
+ sig1 = sigmap1cat(itypi,itypj)
+! sig2 = sigmap2(itypi,itypj)
+! alpha factors from Fcav/Gcav
+ b1cav = alphasurcat(1,itypi,itypj)
+ b2cav = alphasurcat(2,itypi,itypj)
+ b3cav = alphasurcat(3,itypi,itypj)
+ b4cav = alphasurcat(4,itypi,itypj)
+
+! b1cav=0.0d0
+! b2cav=0.0d0
+! b3cav=0.0d0
+! b4cav=0.0d0
+
+! used to determine whether we want to do quadrupole calculations
+ eps_in = epsintabcat(itypi,itypj)
+ if (eps_in.eq.0.0) eps_in=1.0
+
+ eps_inout_fac = ( (1.0d0/eps_in) - (1.0d0/eps_out))
+! Rtail = 0.0d0
+
+ DO k = 1, 3
+ ctail(k,1)=c(k,i+nres)
+ ctail(k,2)=c(k,j)
+ END DO
+ call to_box(ctail(1,1),ctail(2,1),ctail(3,1))
+ call to_box(ctail(1,2),ctail(2,2),ctail(3,2))
+!c! tail distances will be themselves usefull elswhere
+!c1 (in Gcav, for example)
+ do k=1,3
+ Rtail_distance(k) = boxshift(ctail(k,2) - ctail(k,1),locbox(k))
+ enddo
+ Rtail = dsqrt( &
+ (Rtail_distance(1)*Rtail_distance(1)) &
+ + (Rtail_distance(2)*Rtail_distance(2)) &
+ + (Rtail_distance(3)*Rtail_distance(3)))
+! tail location and distance calculations
+! dhead1
+ d1 = dheadcat(1, 1, itypi, itypj)
+! d2 = dhead(2, 1, itypi, itypj)
+ DO k = 1,3
+! location of polar head is computed by taking hydrophobic centre
+! and moving by a d1 * dc_norm vector
+! see unres publications for very informative images
+ chead(k,1) = c(k, i+nres) + d1 * dc_norm(k, i+nres)
+ chead(k,2) = c(k, j)
+ enddo
+ call to_box(chead(1,1),chead(2,1),chead(3,1))
+ call to_box(chead(1,2),chead(2,2),chead(3,2))
+! write(iout,*) "TEST",chead(1,1),chead(2,1),chead(3,1),dc_norm(k, i+nres),d1
+! distance
+! Rsc_distance(k) = dabs(c(k, i+nres) - c(k, j+nres))
+! Rsc(k) = Rsc_distance(k) * Rsc_distance(k)
+ do k=1,3
+ Rhead_distance(k) = boxshift(chead(k,2) - chead(k,1),locbox(k))
+ END DO
+! pitagoras (root of sum of squares)
+ Rhead = dsqrt( &
+ (Rhead_distance(1)*Rhead_distance(1)) &
+ + (Rhead_distance(2)*Rhead_distance(2)) &
+ + (Rhead_distance(3)*Rhead_distance(3)))
+!-------------------------------------------------------------------
+! zero everything that should be zero'ed
+ evdwij = 0.0d0
+ ECL = 0.0d0
+ Elj = 0.0d0
+ Equad = 0.0d0
+ Epol = 0.0d0
+ Fcav=0.0d0
+ eheadtail = 0.0d0
+ dGCLdOM1 = 0.0d0
+ dGCLdOM2 = 0.0d0
+ dGCLdOM12 = 0.0d0
+ dPOLdOM1 = 0.0d0
+ dPOLdOM2 = 0.0d0
+ Fcav = 0.0d0
+ Fisocav=0.0d0
+ dFdR = 0.0d0
+ dCAVdOM1 = 0.0d0
+ dCAVdOM2 = 0.0d0
+ dCAVdOM12 = 0.0d0
+ dscj_inv = vbld_inv(j+nres)
+! print *,i,j,dscj_inv,dsci_inv
+! rij holds 1/(distance of Calpha atoms)
+ rrij = 1.0D0 / ( xj*xj + yj*yj + zj*zj)
+ rij = dsqrt(rrij)
+ CALL sc_angular
+! this should be in elgrad_init but om's are calculated by sc_angular
+! which in turn is used by older potentials
+! om = omega, sqom = om^2
+ sqom1 = om1 * om1
+ sqom2 = om2 * om2
+ sqom12 = om12 * om12
+
+! now we calculate EGB - Gey-Berne
+! It will be summed up in evdwij and saved in evdw
+ sigsq = 1.0D0 / sigsq
+ sig = sig0ij * dsqrt(sigsq)
+! rij_shift = 1.0D0 / rij - sig + sig0ij
+ rij_shift = Rtail - sig + sig0ij
+ IF (rij_shift.le.0.0D0) THEN
+ evdw = 1.0D20
+ if (evdw.gt.1.0d6) then
+ write (*,'(2(1x,a3,i3),7f7.2)') &
+ restyp(itype(i,1),1),i,restyp(itype(j,1),1),j,&
+ 1.0d0/rij,Rtail,Rhead,rij_shift, sig, sig0ij,sigsq
+ write(*,*) facsig,faceps1_inv,om1,chiom1,chi1
+ write(*,*) "ANISO?!",chi1
+!evdwij,Fcav,Ecl,Egb,Epol,Fisocav,Elj,&
+! Equad,evdwij+Fcav+eheadtail,evdw
+ endif
+
+ RETURN
+ END IF
+ sigder = -sig * sigsq
+ rij_shift = 1.0D0 / rij_shift
+ fac = rij_shift**expon
+ c1 = fac * fac * aa_aq_cat(itypi,itypj)
+! print *,"ADAM",aa_aq(itypi,itypj)
+
+! c1 = 0.0d0
+ c2 = fac * bb_aq_cat(itypi,itypj)
+! c2 = 0.0d0
+ evdwij = eps1 * eps2rt * eps3rt * ( c1 + c2 )
+ eps2der = eps3rt * evdwij
+ eps3der = eps2rt * evdwij
+! evdwij = 4.0d0 * eps2rt * eps3rt * evdwij
+ evdwij = eps2rt * eps3rt * evdwij
+!#ifdef TSCSC
+! IF (bb_aq(itypi,itypj).gt.0) THEN
+! evdw_p = evdw_p + evdwij
+! ELSE
+! evdw_m = evdw_m + evdwij
+! END IF
+!#else
+ evdw = evdw &
+ + evdwij
+!#endif
+ c1 = c1 * eps1 * eps2rt**2 * eps3rt**2
+ fac = -expon * (c1 + evdwij) * rij_shift
+ sigder = fac * sigder
+! Calculate distance derivative
+ gg(1) = fac
+ gg(2) = fac
+ gg(3) = fac
+! print *,"GG(1),distance grad",gg(1)
+ fac = chis1 * sqom1 + chis2 * sqom2 &
+ - 2.0d0 * chis12 * om1 * om2 * om12
+ pom = 1.0d0 - chis1 * chis2 * sqom12
+ Lambf = (1.0d0 - (fac / pom))
+ Lambf = dsqrt(Lambf)
+ sparrow = 1.0d0 / dsqrt(sig1**2.0d0 + sig2**2.0d0)
+ Chif = Rtail * sparrow
+ ChiLambf = Chif * Lambf
+ eagle = dsqrt(ChiLambf)
+ bat = ChiLambf ** 11.0d0
+ top = b1cav * ( eagle + b2cav * ChiLambf - b3cav )
+ bot = 1.0d0 + b4cav * (ChiLambf ** 12.0d0)
+ botsq = bot * bot
+ Fcav = top / bot
+
+ dtop = b1cav * ((Lambf / (2.0d0 * eagle)) + (b2cav * Lambf))
+ dbot = 12.0d0 * b4cav * bat * Lambf
+ dFdR = ((dtop * bot - top * dbot) / botsq) * sparrow
+
+ dtop = b1cav * ((Chif / (2.0d0 * eagle)) + (b2cav * Chif))
+ dbot = 12.0d0 * b4cav * bat * Chif
+ eagle = Lambf * pom
+ dFdOM1 = -(chis1 * om1 - chis12 * om2 * om12) / (eagle)
+ dFdOM2 = -(chis2 * om2 - chis12 * om1 * om12) / (eagle)
+ dFdOM12 = chis12 * (chis1 * om1 * om12 - om2) &
+ * (chis2 * om2 * om12 - om1) / (eagle * pom)
+
+ dFdL = ((dtop * bot - top * dbot) / botsq)
+ dCAVdOM1 = dFdL * ( dFdOM1 )
+ dCAVdOM2 = dFdL * ( dFdOM2 )
+ dCAVdOM12 = dFdL * ( dFdOM12 )
+
+ DO k= 1, 3
+ ertail(k) = Rtail_distance(k)/Rtail
+ END DO
+ erdxi = scalar( ertail(1), dC_norm(1,i+nres) )
+ erdxj = scalar( ertail(1), dC_norm(1,j) )
+ facd1 = dtailcat(1,itypi,itypj) * vbld_inv(i+nres)
+ facd2 = dtailcat(2,itypi,itypj) * vbld_inv(j)
+ DO k = 1, 3
+ pom = ertail(k)-facd1*(ertail(k)-erdxi*dC_norm(k,i+nres))
+ gradpepcatx(k,i) = gradpepcatx(k,i) &
+ - (( dFdR + gg(k) ) * pom)
+ pom = ertail(k)-facd2*(ertail(k)-erdxj*dC_norm(k,j))
+! gvdwx(k,j) = gvdwx(k,j) &
+! + (( dFdR + gg(k) ) * pom)
+ gradpepcat(k,i) = gradpepcat(k,i) &
+ - (( dFdR + gg(k) ) * ertail(k))
+ gradpepcat(k,j) = gradpepcat(k,j) &
+ + (( dFdR + gg(k) ) * ertail(k))
+ gg(k) = 0.0d0
+ ENDDO
+!c! Compute head-head and head-tail energies for each state
+!! if (.false.) then ! turn off electrostatic
+ if (itype(j,5).gt.0) then ! the normal cation case
+ isel = iabs(Qi) + 1 ! ion is always charged so iabs(Qj)
+! print *,i,itype(i,1),isel
+ IF (isel.eq.0) THEN
+!c! No charges - do nothing
+ eheadtail = 0.0d0
+
+ ELSE IF (isel.eq.1) THEN
+!c! Nonpolar-charge interactions
+ if ((itype(i,1).eq.27).or.(itype(i,1).eq.26).or.(itype(i,1).eq.25)) then
+ Qi=Qi*2
+ Qij=Qij*2
+ endif
+
+ CALL enq_cat(epol)
+ eheadtail = epol
+! eheadtail = 0.0d0
+
+ ELSE IF (isel.eq.3) THEN
+!c! Dipole-charge interactions
+ if ((itype(i,1).eq.27).or.(itype(i,1).eq.26).or.(itype(i,1).eq.25)) then
+ Qi=Qi*2
+ Qij=Qij*2
+ endif
+! write(iout,*) "KURWA0",d1
+
+ CALL edq_cat(ecl, elj, epol)
+ eheadtail = ECL + elj + epol
+! eheadtail = 0.0d0
+
+ ELSE IF ((isel.eq.2)) THEN
+
+!c! Same charge-charge interaction ( +/+ or -/- )
+ if ((itype(i,1).eq.27).or.(itype(i,1).eq.26).or.(itype(i,1).eq.25)) then
+ Qi=Qi*2
+ Qij=Qij*2
+ endif
+
+ CALL eqq_cat(Ecl,Egb,Epol,Fisocav,Elj)
+ eheadtail = ECL + Egb + Epol + Fisocav + Elj
+! eheadtail = 0.0d0
+
+! ELSE IF ((isel.eq.2.and. &
+! iabs(Qi).eq.1).and. &
+! nstate(itypi,itypj).ne.1) THEN
+!c! Different charge-charge interaction ( +/- or -/+ )
+! if ((itype(i,1).eq.27).or.(itype(i,1).eq.26).or.(itype(i,1).eq.25)) then
+! Qi=Qi*2
+! Qij=Qij*2
+! endif
+! if ((itype(j,1).eq.27).or.(itype(j,1).eq.26).or.(itype(j,1).eq.25)) then
+! Qj=Qj*2
+! Qij=Qij*2
+! endif
+!
+! CALL energy_quad(istate,eheadtail,Ecl,Egb,Epol,Fisocav,Elj,Equad)
+ END IF ! this endif ends the "catch the gly-gly" at the beggining of Fcav
+ else
+ write(iout,*) "not yet implemented",j,itype(j,5)
+ endif
+!! endif ! turn off electrostatic
+ evdw = evdw + Fcav + eheadtail
+! if (evdw.gt.1.0d6) then
+! write (*,'(2(1x,a3,i3),3f6.2,10f16.7)') &
+! restyp(itype(i,1),1),i,restyp(itype(j,1),1),j,&
+! 1.0d0/rij,Rtail,Rhead,evdwij,Fcav,Ecl,Egb,Epol,Fisocav,Elj,&
+! Equad,evdwij+Fcav+eheadtail,evdw
+! endif
+
+ IF (energy_dec) write (iout,'(2(1x,a3,i3),3f6.2,10f16.7)') &
+ restyp(itype(i,1),1),i,restyp(itype(j,1),1),j,&
+ 1.0d0/rij,Rtail,Rhead,evdwij,Fcav,Ecl,Egb,Epol,Fisocav,Elj,&
+ Equad,evdwij+Fcav+eheadtail,evdw
+! evdw = evdw + Fcav + eheadtail
+! print *,"before sc_grad_cat", i,j, gradpepcat(1,j)
+! iF (nstate(itypi,itypj).eq.1) THEN
+ CALL sc_grad_cat
+! print *,"after sc_grad_cat", i,j, gradpepcat(1,j)
+
+! END IF
+!c!-------------------------------------------------------------------
+!c! NAPISY KONCOWE
+ END DO ! j
+ END DO ! i
+!c write (iout,*) "Number of loop steps in EGB:",ind
+!c energy_dec=.false.
+! print *,"EVDW KURW",evdw,nres
+!!! return
+ 17 continue
+! go to 23
+ do i=ibond_start,ibond_end
+
+! print *,"I am in EVDW",i
+ itypi=10 ! the peptide group parameters are for glicine
+
+! if (i.ne.47) cycle
+ if ((itype(i,1).eq.ntyp1).or.itype(i+1,1).eq.ntyp1) cycle
+ itypi1=iabs(itype(i+1,1))
+ xi=(c(1,i)+c(1,i+1))/2.0
+ yi=(c(2,i)+c(2,i+1))/2.0
+ zi=(c(3,i)+c(3,i+1))/2.0
+ call to_box(xi,yi,zi)
+ dxi=dc_norm(1,i)
+ dyi=dc_norm(2,i)
+ dzi=dc_norm(3,i)
+ dsci_inv=vbld_inv(i+1)/2.0
+ do j=itmp+1,itmp+nres_molec(5)
+
+! Calculate SC interaction energy.
+ itypj=iabs(itype(j,5))
+ if ((itypj.eq.ntyp1)) cycle
+ CALL elgrad_init_cat_pep(eheadtail,Egb,Ecl,Elj,Equad,Epol)
+
+ dscj_inv=0.0
+ xj=c(1,j)
+ yj=c(2,j)
+ zj=c(3,j)
+ call to_box(xj,yj,zj)
+ xj=boxshift(xj-xi,boxxsize)
+ yj=boxshift(yj-yi,boxysize)
+ zj=boxshift(zj-zi,boxzsize)
+
+ dist_init=(xj-xi)**2+(yj-yi)**2+(zj-zi)**2
+
+ dxj = 0.0d0! dc_norm( 1, nres+j )
+ dyj = 0.0d0!dc_norm( 2, nres+j )
+ dzj = 0.0d0! dc_norm( 3, nres+j )
+
+ itypi = 10
+ itypj = itype(j,5)
+! Parameters from fitting the analitical expressions to the PMF obtained by umbrella
+! sampling performed with amber package
+! alf1 = 0.0d0
+! alf2 = 0.0d0
+! alf12 = 0.0d0
+! a12sq = rborn(itypi,itypj) * rborn(itypj,itypi)
+ chi1 = chi1cat(itypi,itypj)
+ chis1 = chis1cat(itypi,itypj)
+ chip1 = chipp1cat(itypi,itypj)
+! chi1=0.0d0
+! chis1=0.0d0
+! chip1=0.0d0
+ chi2=0.0
+ chip2=0.0
+ chis2=0.0
+! chis2 = chis(itypj,itypi)
+ chis12 = chis1 * chis2
+ sig1 = sigmap1cat(itypi,itypj)
+! sig2 = sigmap2(itypi,itypj)
+! alpha factors from Fcav/Gcav
+ b1cav = alphasurcat(1,itypi,itypj)
+ b2cav = alphasurcat(2,itypi,itypj)
+ b3cav = alphasurcat(3,itypi,itypj)
+ b4cav = alphasurcat(4,itypi,itypj)
+
+! used to determine whether we want to do quadrupole calculations
+ eps_in = epsintabcat(itypi,itypj)
+ if (eps_in.eq.0.0) eps_in=1.0
+
+ eps_inout_fac = ( (1.0d0/eps_in) - (1.0d0/eps_out))
+! Rtail = 0.0d0
+
+ DO k = 1, 3
+ ctail(k,1)=(c(k,i)+c(k,i+1))/2.0
+ ctail(k,2)=c(k,j)
+ END DO
+ call to_box(ctail(1,1),ctail(2,1),ctail(3,1))
+ call to_box(ctail(1,2),ctail(2,2),ctail(3,2))
+!c! tail distances will be themselves usefull elswhere
+!c1 (in Gcav, for example)
+ do k=1,3
+ Rtail_distance(k) = boxshift(ctail(k,2) - ctail(k,1),locbox(k))
+ enddo
+
+!c! tail distances will be themselves usefull elswhere
+!c1 (in Gcav, for example)
+ Rtail = dsqrt( &
+ (Rtail_distance(1)*Rtail_distance(1)) &
+ + (Rtail_distance(2)*Rtail_distance(2)) &
+ + (Rtail_distance(3)*Rtail_distance(3)))
+! tail location and distance calculations
+! dhead1
+ d1 = dheadcat(1, 1, itypi, itypj)
+! print *,"d1",d1
+! d1=0.0d0
+! d2 = dhead(2, 1, itypi, itypj)
+ DO k = 1,3
+! location of polar head is computed by taking hydrophobic centre
+! and moving by a d1 * dc_norm vector
+! see unres publications for very informative images
+ chead(k,1) = (c(k, i)+c(k,i+1))/2.0 + d1 * dc_norm(k, i)
+ chead(k,2) = c(k, j)
+ ENDDO
+! distance
+! Rsc_distance(k) = dabs(c(k, i+nres) - c(k, j+nres))
+! Rsc(k) = Rsc_distance(k) * Rsc_distance(k)
+ call to_box(chead(1,1),chead(2,1),chead(3,1))
+ call to_box(chead(1,2),chead(2,2),chead(3,2))
+
+! distance
+! Rsc_distance(k) = dabs(c(k, i+nres) - c(k, j+nres))
+! Rsc(k) = Rsc_distance(k) * Rsc_distance(k)
+ do k=1,3
+ Rhead_distance(k) = boxshift(chead(k,2) - chead(k,1),locbox(k))
+ END DO
+
+! pitagoras (root of sum of squares)
+ Rhead = dsqrt( &
+ (Rhead_distance(1)*Rhead_distance(1)) &
+ + (Rhead_distance(2)*Rhead_distance(2)) &
+ + (Rhead_distance(3)*Rhead_distance(3)))
+!-------------------------------------------------------------------
+! zero everything that should be zero'ed
+ evdwij = 0.0d0
+ ECL = 0.0d0
+ Elj = 0.0d0
+ Equad = 0.0d0
+ Epol = 0.0d0
+ Fcav=0.0d0
+ eheadtail = 0.0d0
+ dGCLdOM1 = 0.0d0
+ dGCLdOM2 = 0.0d0
+ dGCLdOM12 = 0.0d0
+ dPOLdOM1 = 0.0d0
+ dPOLdOM2 = 0.0d0
+ Fcav = 0.0d0
+ dFdR = 0.0d0
+ dCAVdOM1 = 0.0d0
+ dCAVdOM2 = 0.0d0
+ dCAVdOM12 = 0.0d0
+ dscj_inv = vbld_inv(j+nres)
+! print *,i,j,dscj_inv,dsci_inv
+! rij holds 1/(distance of Calpha atoms)
+ rrij = 1.0D0 / ( xj*xj + yj*yj + zj*zj)
+ rij = dsqrt(rrij)
+ CALL sc_angular
+! this should be in elgrad_init but om's are calculated by sc_angular
+! which in turn is used by older potentials
+! om = omega, sqom = om^2
+ sqom1 = om1 * om1
+ sqom2 = om2 * om2
+ sqom12 = om12 * om12
+
+! now we calculate EGB - Gey-Berne
+! It will be summed up in evdwij and saved in evdw
+ sigsq = 1.0D0 / sigsq
+ sig = sig0ij * dsqrt(sigsq)
+! rij_shift = 1.0D0 / rij - sig + sig0ij
+ rij_shift = Rtail - sig + sig0ij
+ IF (rij_shift.le.0.0D0) THEN
+ evdw = 1.0D20
+! if (evdw.gt.1.0d6) then
+! write (*,'(2(1x,a3,i3),6f6.2)') &
+! restyp(itype(i,1),1),i,restyp(itype(j,1),1),j,&
+! 1.0d0/rij,Rtail,Rhead,rij_shift, sig, sig0ij
+!evdwij,Fcav,Ecl,Egb,Epol,Fisocav,Elj,&
+! Equad,evdwij+Fcav+eheadtail,evdw
+! endif
+ RETURN
+ END IF
+ sigder = -sig * sigsq
+ rij_shift = 1.0D0 / rij_shift
+ fac = rij_shift**expon
+ c1 = fac * fac * aa_aq_cat(itypi,itypj)
+! print *,"ADAM",aa_aq(itypi,itypj)
+
+! c1 = 0.0d0
+ c2 = fac * bb_aq_cat(itypi,itypj)
+! c2 = 0.0d0
+ evdwij = eps1 * eps2rt * eps3rt * ( c1 + c2 )
+ eps2der = eps3rt * evdwij
+ eps3der = eps2rt * evdwij
+! evdwij = 4.0d0 * eps2rt * eps3rt * evdwij
+ evdwij = eps2rt * eps3rt * evdwij
+!#ifdef TSCSC
+! IF (bb_aq(itypi,itypj).gt.0) THEN
+! evdw_p = evdw_p + evdwij
+! ELSE
+! evdw_m = evdw_m + evdwij
+! END IF
+!#else
+ evdw = evdw &
+ + evdwij
+!#endif
+ c1 = c1 * eps1 * eps2rt**2 * eps3rt**2
+ fac = -expon * (c1 + evdwij) * rij_shift
+ sigder = fac * sigder
+! Calculate distance derivative
+ gg(1) = fac
+ gg(2) = fac
+ gg(3) = fac
+
+ fac = chis1 * sqom1 + chis2 * sqom2 &
+ - 2.0d0 * chis12 * om1 * om2 * om12
+
+ pom = 1.0d0 - chis1 * chis2 * sqom12
+! print *,"TUT2",fac,chis1,sqom1,pom
+ Lambf = (1.0d0 - (fac / pom))
+ Lambf = dsqrt(Lambf)
+ sparrow = 1.0d0 / dsqrt(sig1**2.0d0 + sig2**2.0d0)
+ Chif = Rtail * sparrow
+ ChiLambf = Chif * Lambf
+ eagle = dsqrt(ChiLambf)
+ bat = ChiLambf ** 11.0d0
+ top = b1cav * ( eagle + b2cav * ChiLambf - b3cav )
+ bot = 1.0d0 + b4cav * (ChiLambf ** 12.0d0)
+ botsq = bot * bot
+ Fcav = top / bot
+
+ dtop = b1cav * ((Lambf / (2.0d0 * eagle)) + (b2cav * Lambf))
+ dbot = 12.0d0 * b4cav * bat * Lambf
+ dFdR = ((dtop * bot - top * dbot) / botsq) * sparrow
+
+ dtop = b1cav * ((Chif / (2.0d0 * eagle)) + (b2cav * Chif))
+ dbot = 12.0d0 * b4cav * bat * Chif
+ eagle = Lambf * pom
+ dFdOM1 = -(chis1 * om1 - chis12 * om2 * om12) / (eagle)
+ dFdOM2 = -(chis2 * om2 - chis12 * om1 * om12) / (eagle)
+ dFdOM12 = chis12 * (chis1 * om1 * om12 - om2) &
+ * (chis2 * om2 * om12 - om1) / (eagle * pom)
+
+ dFdL = ((dtop * bot - top * dbot) / botsq)
+ dCAVdOM1 = dFdL * ( dFdOM1 )
+ dCAVdOM2 = dFdL * ( dFdOM2 )
+ dCAVdOM12 = dFdL * ( dFdOM12 )
+
+ DO k= 1, 3
+ ertail(k) = Rtail_distance(k)/Rtail
+ END DO
+ erdxi = scalar( ertail(1), dC_norm(1,i) )
+ erdxj = scalar( ertail(1), dC_norm(1,j) )
+ facd1 = dtailcat(1,itypi,itypj) * vbld_inv(i)
+ facd2 = dtailcat(2,itypi,itypj) * vbld_inv(j+nres)
+ DO k = 1, 3
+ pom = ertail(k)-facd1*(ertail(k)-erdxi*dC_norm(k,i))
+! gradpepcatx(k,i) = gradpepcatx(k,i) &
+! - (( dFdR + gg(k) ) * pom)
+ pom = ertail(k)-facd2*(ertail(k)-erdxj*dC_norm(k,j+nres))
+! gvdwx(k,j) = gvdwx(k,j) &
+! + (( dFdR + gg(k) ) * pom)
+ gradpepcat(k,i) = gradpepcat(k,i) &
+ - (( dFdR + gg(k) ) * ertail(k))/2.0d0
+ gradpepcat(k,i+1) = gradpepcat(k,i+1) &
+ - (( dFdR + gg(k) ) * ertail(k))/2.0d0
+
+ gradpepcat(k,j) = gradpepcat(k,j) &
+ + (( dFdR + gg(k) ) * ertail(k))
+ gg(k) = 0.0d0
+ ENDDO
+ if (itype(j,5).gt.0) then
+!c! Compute head-head and head-tail energies for each state
+ isel = 3
+!c! Dipole-charge interactions
+ CALL edq_cat_pep(ecl, elj, epol)
+ eheadtail = ECL + elj + epol
+! print *,"i,",i,eheadtail
+! eheadtail = 0.0d0
+ else
+!HERE WATER and other types of molecules solvents will be added
+ write(iout,*) "not yet implemented"
+! CALL edd_cat_pep
+ endif
+ evdw = evdw + Fcav + eheadtail
+! if (evdw.gt.1.0d6) then
+! write (*,'(2(1x,a3,i3),3f6.2,10f16.7)') &
+! restyp(itype(i,1),1),i,restyp(itype(j,1),1),j,&
+! 1.0d0/rij,Rtail,Rhead,evdwij,Fcav,Ecl,Egb,Epol,Fisocav,Elj,&
+! Equad,evdwij+Fcav+eheadtail,evdw
+! endif
+ IF (energy_dec) write (iout,'(2(1x,a3,i3),3f6.2,10f16.7)') &
+ restyp(itype(i,1),1),i,restyp(itype(j,1),1),j,&
+ 1.0d0/rij,Rtail,Rhead,evdwij,Fcav,Ecl,Egb,Epol,Fisocav,Elj,&
+ Equad,evdwij+Fcav+eheadtail,evdw
+! evdw = evdw + Fcav + eheadtail
+
+! iF (nstate(itypi,itypj).eq.1) THEN
+ CALL sc_grad_cat_pep
+! END IF
+!c!-------------------------------------------------------------------
+!c! NAPISY KONCOWE
+ END DO ! j
+ END DO ! i
+!c write (iout,*) "Number of loop steps in EGB:",ind
+!c energy_dec=.false.
+! print *,"EVDW KURW",evdw,nres
+ 23 continue
+! print *,"before leave sc_grad_cat", i,j, gradpepcat(1,nres-1)
+
+ return
+ end subroutine ecats_prot_amber
+
+!---------------------------------------------------------------------------
+! old for Ca2+
+ subroutine ecat_prot(ecation_prot)
+! use calc_data
+! use comm_momo
+ integer i,j,k,subchap,itmp,inum
+ real(kind=8) :: xi,yi,zi,xj,yj,zj,ract,rcat0,epscalc,r06,r012,&
+ r7,r4,ecationcation
+ real(kind=8) xj_temp,yj_temp,zj_temp,xj_safe,yj_safe,zj_safe, &
+ dist_init,dist_temp,ecation_prot,rcal,rocal, &
+ Evan1,Evan2,EC,cm1mag,DASGL,delta,r0p,Epepcat, &
+ catl,cml,calpl, Etotal_p, Etotal_m,rtab,wdip,wmodquad,wquad1, &
+ wquad2,wvan1,E1,E2,wconst,wvan2,rcpm,dcmag,sin2thet,sinthet, &
+ costhet,v1m,v2m,wh2o,wc,rsecp,Ir,Irsecp,Irthrp,Irfourp,Irfiftp,&
+ Irsistp,Irseven,Irtwelv,Irthir,dE1dr,dE2dr,dEdcos,wquad2p,opt, &
+ rs,rthrp,rfourp,rsixp,reight,Irsixp,Ireight,Irtw,Irfourt, &
+ opt1,opt2,opt3,opt4,opt5,opt6,opt7,opt8,opt9,opt10,opt11,opt12,&
+ opt13,opt14,opt15,opt16,opt17,opt18,opt19, &
+ Equad1,Equad2,dscmag,v1dpv2,dscmag3,constA,constB,Edip,&
+ ndiv,ndivi
+ real(kind=8),dimension(3) ::dEvan1Cmcat,dEvan2Cmcat,dEeleccat,&
+ gg,r,EtotalCat,dEtotalCm,dEtotalCalp,dEvan1Cm,dEvan2Cm, &
+ dEtotalpep,dEtotalcat_num,dEddci,dEtotalcm_num,dEtotalcalp_num, &
+ tab1,tab2,tab3,diff,cm1,sc,p,tcat,talp,cm,drcp,drcp_norm,vcat, &
+ v1,v2,v3,myd_norm,dx,vcm,valpha,drdpep,dcosdpep,dcosddci,dEdpep,&
+ dEcCat,dEdipCm,dEdipCalp,dEquad1Cat,dEquad1Cm,dEquad1Calp, &
+ dEquad2Cat,dEquad2Cm,dEquad2Calpd,Evan1Cat,dEvan1Calp,dEvan2Cat,&
+ dEvan2Calp,dEtotalCat,dscvec,dEcCm,dEcCalp,dEdipCat,dEquad2Calp,&
+ dEvan1Cat
+ real(kind=8),dimension(6) :: vcatprm
+ ecation_prot=0.0d0
+! first lets calculate interaction with peptide groups
+ if (nres_molec(5).eq.0) return
+ itmp=0
+ do i=1,4
+ itmp=itmp+nres_molec(i)
+ enddo
+! do i=1,nres_molec(1)-1 ! loop over all peptide groups needs parralelization
+ do i=ibond_start,ibond_end
+! cycle
+ if ((itype(i,1).eq.ntyp1).or.(itype(i+1,1).eq.ntyp1)) cycle ! leave dummy atoms
+ xi=0.5d0*(c(1,i)+c(1,i+1))
+ yi=0.5d0*(c(2,i)+c(2,i+1))
+ zi=0.5d0*(c(3,i)+c(3,i+1))
+ call to_box(xi,yi,zi)
+
+ do j=itmp+1,itmp+nres_molec(5)
+! print *,"WTF",itmp,j,i
+! all parameters were for Ca2+ to approximate single charge divide by two
+ ndiv=1.0
+ if ((itype(j,5).eq.1).or.(itype(j,5).eq.3)) ndiv=2.0
+ wconst=78*ndiv
+ wdip =1.092777950857032D2
+ wdip=wdip/wconst
+ wmodquad=-2.174122713004870D4
+ wmodquad=wmodquad/wconst
+ wquad1 = 3.901232068562804D1
+ wquad1=wquad1/wconst
+ wquad2 = 3
+ wquad2=wquad2/wconst
+ wvan1 = 0.1
+ wvan2 = 6
+! itmp=0
+
+ xj=c(1,j)
+ yj=c(2,j)
+ zj=c(3,j)
+ call to_box(xj,yj,zj)
+ dist_init=(xj-xi)**2+(yj-yi)**2+(zj-zi)**2
+! enddo
+! enddo
+ rcpm = sqrt(xj**2+yj**2+zj**2)
+ drcp_norm(1)=xj/rcpm
+ drcp_norm(2)=yj/rcpm
+ drcp_norm(3)=zj/rcpm
+ dcmag=0.0
+ do k=1,3
+ dcmag=dcmag+dc(k,i)**2
+ enddo
+ dcmag=dsqrt(dcmag)
+ do k=1,3
+ myd_norm(k)=dc(k,i)/dcmag
+ enddo
+ costhet=drcp_norm(1)*myd_norm(1)+drcp_norm(2)*myd_norm(2)+&
+ drcp_norm(3)*myd_norm(3)
+ rsecp = rcpm**2
+ Ir = 1.0d0/rcpm
+ Irsecp = 1.0d0/rsecp
+ Irthrp = Irsecp/rcpm
+ Irfourp = Irthrp/rcpm
+ Irfiftp = Irfourp/rcpm
+ Irsistp=Irfiftp/rcpm
+ Irseven=Irsistp/rcpm
+ Irtwelv=Irsistp*Irsistp
+ Irthir=Irtwelv/rcpm
+ sin2thet = (1-costhet*costhet)
+ sinthet=sqrt(sin2thet)
+ E1 = wdip*Irsecp*costhet+(wmodquad*Irfourp+wquad1*Irthrp)&
+ *sin2thet
+ E2 = -wquad1*Irthrp*wquad2+wvan1*(wvan2**12*Irtwelv-&
+ 2*wvan2**6*Irsistp)
+ ecation_prot = ecation_prot+E1+E2
+! print *,"ecatprot",i,j,ecation_prot,rcpm
+ dE1dr = -2*costhet*wdip*Irthrp-&
+ (4*wmodquad*Irfiftp+3*wquad1*Irfourp)*sin2thet
+ dE2dr = 3*wquad1*wquad2*Irfourp- &
+ 12*wvan1*wvan2**6*(wvan2**6*Irthir-Irseven)
+ dEdcos = wdip*Irsecp-2*(wmodquad*Irfourp+wquad1*Irthrp)*costhet
+ do k=1,3
+ drdpep(k) = -drcp_norm(k)
+ dcosdpep(k) = Ir*(costhet*drcp_norm(k)-myd_norm(k))
+ dcosddci(k) = drcp_norm(k)/dcmag-costhet*myd_norm(k)/dcmag
+ dEdpep(k) = (dE1dr+dE2dr)*drdpep(k)+dEdcos*dcosdpep(k)
+ dEddci(k) = dEdcos*dcosddci(k)
+ enddo
+ do k=1,3
+ gradpepcat(k,i)=gradpepcat(k,i)+0.5D0*dEdpep(k)-dEddci(k)
+ gradpepcat(k,i+1)=gradpepcat(k,i+1)+0.5D0*dEdpep(k)+dEddci(k)
+ gradpepcat(k,j)=gradpepcat(k,j)-dEdpep(k)
+ enddo
+ enddo ! j
+ enddo ! i
+!------------------------------------------sidechains
+! do i=1,nres_molec(1)
+ do i=ibond_start,ibond_end
+ if ((itype(i,1).eq.ntyp1)) cycle ! leave dummy atoms
+! cycle
+! print *,i,ecation_prot
+ xi=(c(1,i+nres))
+ yi=(c(2,i+nres))
+ zi=(c(3,i+nres))
+ call to_box(xi,yi,zi)
+ do k=1,3
+ cm1(k)=dc(k,i+nres)
+ enddo
+ cm1mag=sqrt(cm1(1)**2+cm1(2)**2+cm1(3)**2)
+ do j=itmp+1,itmp+nres_molec(5)
+ ndiv=1.0
+ if ((itype(j,5).eq.1).or.(itype(j,5).eq.3)) ndiv=2.0
+
+ xj=c(1,j)
+ yj=c(2,j)
+ zj=c(3,j)
+ call to_box(xj,yj,zj)
+ dist_init=(xj-xi)**2+(yj-yi)**2+(zj-zi)**2
+! enddo
+! enddo
+! 15- Glu 16-Asp
+ if((itype(i,1).eq.15.or.itype(i,1).eq.16).or.&
+ ((itype(i,1).eq.27).or.(itype(i,1).eq.26).or.&
+ (itype(i,1).eq.25))) then
+ if(itype(i,1).eq.16) then
+ inum=1
+ else
+ inum=2
+ endif
+ do k=1,6
+ vcatprm(k)=catprm(k,inum)
+ enddo
+ dASGL=catprm(7,inum)
+! do k=1,3
+! vcm(k)=(cm1(k)/cm1mag)*dASGL+c(k,i+nres)
+ vcm(1)=(cm1(1)/cm1mag)*dASGL+xi
+ vcm(2)=(cm1(2)/cm1mag)*dASGL+yi
+ vcm(3)=(cm1(3)/cm1mag)*dASGL+zi
+
+! valpha(k)=c(k,i)
+! vcat(k)=c(k,j)
+ if (subchap.eq.1) then
+ vcat(1)=xj_temp
+ vcat(2)=yj_temp
+ vcat(3)=zj_temp
+ else
+ vcat(1)=xj_safe
+ vcat(2)=yj_safe
+ vcat(3)=zj_safe
+ endif
+ valpha(1)=xi-c(1,i+nres)+c(1,i)
+ valpha(2)=yi-c(2,i+nres)+c(2,i)
+ valpha(3)=zi-c(3,i+nres)+c(3,i)
+
+! enddo
+ do k=1,3
+ dx(k) = vcat(k)-vcm(k)
+ enddo
+ do k=1,3
+ v1(k)=(vcm(k)-valpha(k))
+ v2(k)=(vcat(k)-valpha(k))
+ enddo
+ v1m = sqrt(v1(1)**2+v1(2)**2+v1(3)**2)
+ v2m = sqrt(v2(1)**2+v2(2)**2+v2(3)**2)
+ v1dpv2 = v1(1)*v2(1)+v1(2)*v2(2)+v1(3)*v2(3)
+
+! The weights of the energy function calculated from
+!The quantum mechanical GAMESS simulations of calcium with ASP/GLU
+ if ((itype(i,1).eq.27).or.(itype(i,1).eq.26).or.(itype(i,1).eq.25)) then
+ ndivi=0.5
+ else
+ ndivi=1.0
+ endif
+ ndiv=1.0
+ if ((itype(j,5).eq.1).or.(itype(j,5).eq.3)) ndiv=2.0
+
+ wh2o=78*ndivi*ndiv
+ wc = vcatprm(1)
+ wc=wc/wh2o
+ wdip =vcatprm(2)
+ wdip=wdip/wh2o
+ wquad1 =vcatprm(3)
+ wquad1=wquad1/wh2o
+ wquad2 = vcatprm(4)
+ wquad2=wquad2/wh2o
+ wquad2p = 1.0d0-wquad2
+ wvan1 = vcatprm(5)
+ wvan2 =vcatprm(6)
+ opt = dx(1)**2+dx(2)**2
+ rsecp = opt+dx(3)**2
+ rs = sqrt(rsecp)
+ rthrp = rsecp*rs
+ rfourp = rthrp*rs
+ rsixp = rfourp*rsecp
+ reight=rsixp*rsecp
+ Ir = 1.0d0/rs
+ Irsecp = 1.0d0/rsecp
+ Irthrp = Irsecp/rs
+ Irfourp = Irthrp/rs
+ Irsixp = 1.0d0/rsixp
+ Ireight=1.0d0/reight
+ Irtw=Irsixp*Irsixp
+ Irthir=Irtw/rs
+ Irfourt=Irthir/rs
+ opt1 = (4*rs*dx(3)*wdip)
+ opt2 = 6*rsecp*wquad1*opt
+ opt3 = wquad1*wquad2p*Irsixp
+ opt4 = (wvan1*wvan2**12)
+ opt5 = opt4*12*Irfourt
+ opt6 = 2*wvan1*wvan2**6
+ opt7 = 6*opt6*Ireight
+ opt8 = wdip/v1m
+ opt10 = wdip/v2m
+ opt11 = (rsecp*v2m)**2
+ opt12 = (rsecp*v1m)**2
+ opt14 = (v1m*v2m*rsecp)**2
+ opt15 = -wquad1/v2m**2
+ opt16 = (rthrp*(v1m*v2m)**2)**2
+ opt17 = (v1m**2*rthrp)**2
+ opt18 = -wquad1/rthrp
+ opt19 = (v1m**2*v2m**2)**2
+ Ec = wc*Ir
+ do k=1,3
+ dEcCat(k) = -(dx(k)*wc)*Irthrp
+ dEcCm(k)=(dx(k)*wc)*Irthrp
+ dEcCalp(k)=0.0d0
+ enddo
+ Edip=opt8*(v1dpv2)/(rsecp*v2m)
+ do k=1,3
+ dEdipCat(k)=opt8*(v1(k)*rsecp*v2m-((v2(k)/v2m &
+ *rsecp+2*dx(k)*v2m)*v1dpv2))/opt11
+ dEdipCm(k)=opt10*(v2(k)*rsecp*v1m-((v1(k)/v1m &
+ *rsecp-2*dx(k)*v1m)*v1dpv2))/opt12
+ dEdipCalp(k)=wdip*((-v1(k)-v2(k))*rsecp*v1m &
+ *v2m-(-v1(k)/v1m*v2m*rsecp-v2(k)/v2m*v1m*rsecp) &
+ *v1dpv2)/opt14
+ enddo
+ Equad1=-wquad1*v1dpv2**2/(rthrp*(v1m*v2m)**2)
+ do k=1,3
+ dEquad1Cat(k)=-wquad1*(2*v1(k)*v1dpv2*(rthrp* &
+ (v1m*v2m)**2)-(3*dx(k)*rs*(v1m*v2m)**2+2*v1m*2* &
+ v2(k)*1/2*1/v2m*v1m*v2m*rthrp)*v1dpv2**2)/opt16
+ dEquad1Cm(k)=-wquad1*(2*v2(k)*v1dpv2*(rthrp* &
+ (v1m*v2m)**2)-(-3*dx(k)*rs*(v1m*v2m)**2+2*v2m*2* &
+ v1(k)*1/2*1/v1m*v2m*v1m*rthrp)*v1dpv2**2)/opt16
+ dEquad1Calp(k)=opt18*(2*(-v1(k)-v2(k))*v1dpv2* &
+ v1m**2*v2m**2-(-2*v1(k)*v2m**2-2*v2(k)*v1m**2)* &
+ v1dpv2**2)/opt19
+ enddo
+ Equad2=wquad1*wquad2p*Irthrp
+ do k=1,3
+ dEquad2Cat(k)=-3*dx(k)*rs*opt3
+ dEquad2Cm(k)=3*dx(k)*rs*opt3
+ dEquad2Calp(k)=0.0d0
+ enddo
+ Evan1=opt4*Irtw
+ do k=1,3
+ dEvan1Cat(k)=-dx(k)*opt5
+ dEvan1Cm(k)=dx(k)*opt5
+ dEvan1Calp(k)=0.0d0
+ enddo
+ Evan2=-opt6*Irsixp
+ do k=1,3
+ dEvan2Cat(k)=dx(k)*opt7
+ dEvan2Cm(k)=-dx(k)*opt7
+ dEvan2Calp(k)=0.0d0
+ enddo
+ ecation_prot=ecation_prot+Ec+Edip+Equad1+Equad2+Evan1+Evan2
+! print *,ecation_prot,Ec+Edip+Equad1+Equad2+Evan1+Evan2
+
+ do k=1,3
+ dEtotalCat(k)=dEcCat(k)+dEdipCat(k)+dEquad1Cat(k)+ &
+ dEquad2Cat(k)+dEvan1Cat(k)+dEvan2Cat(k)
+!c write(*,*) 'dEtotalCat inside', (dEtotalCat(l),l=1,3)
+ dEtotalCm(k)=dEcCm(k)+dEdipCm(k)+dEquad1Cm(k)+ &
+ dEquad2Cm(k)+dEvan1Cm(k)+dEvan2Cm(k)
+ dEtotalCalp(k)=dEcCalp(k)+dEdipCalp(k)+dEquad1Calp(k) &
+ +dEquad2Calp(k)+dEvan1Calp(k)+dEvan2Calp(k)
+ enddo
+ dscmag = 0.0d0
+ do k=1,3
+ dscvec(k) = dc(k,i+nres)
+ dscmag = dscmag+dscvec(k)*dscvec(k)
+ enddo
+ dscmag3 = dscmag
+ dscmag = sqrt(dscmag)
+ dscmag3 = dscmag3*dscmag
+ constA = 1.0d0+dASGL/dscmag
+ constB = 0.0d0
+ do k=1,3
+ constB = constB+dscvec(k)*dEtotalCm(k)
+ enddo
+ constB = constB*dASGL/dscmag3
+ do k=1,3
+ gg(k) = dEtotalCm(k)+dEtotalCalp(k)
+ gradpepcatx(k,i)=gradpepcatx(k,i)+ &
+ constA*dEtotalCm(k)-constB*dscvec(k)
+! print *,j,constA,dEtotalCm(k),constB,dscvec(k)
+ gradpepcat(k,i)=gradpepcat(k,i)+gg(k)
+ gradpepcat(k,j)=gradpepcat(k,j)+dEtotalCat(k)
+ enddo
+ else if (itype(i,1).eq.13.or.itype(i,1).eq.14) then
+ if(itype(i,1).eq.14) then
+ inum=3
+ else
+ inum=4
+ endif
+ do k=1,6
+ vcatprm(k)=catprm(k,inum)
+ enddo
+ dASGL=catprm(7,inum)
+! do k=1,3
+! vcm(k)=(cm1(k)/cm1mag)*dASGL+c(k,i+nres)
+! valpha(k)=c(k,i)
+! vcat(k)=c(k,j)
+! enddo
+ vcm(1)=(cm1(1)/cm1mag)*dASGL+xi
+ vcm(2)=(cm1(2)/cm1mag)*dASGL+yi
+ vcm(3)=(cm1(3)/cm1mag)*dASGL+zi
+ if (subchap.eq.1) then
+ vcat(1)=xj_temp
+ vcat(2)=yj_temp
+ vcat(3)=zj_temp
+ else
+ vcat(1)=xj_safe
+ vcat(2)=yj_safe
+ vcat(3)=zj_safe
+ endif
+ valpha(1)=xi-c(1,i+nres)+c(1,i)
+ valpha(2)=yi-c(2,i+nres)+c(2,i)
+ valpha(3)=zi-c(3,i+nres)+c(3,i)
+
+
+ do k=1,3
+ dx(k) = vcat(k)-vcm(k)
+ enddo
+ do k=1,3
+ v1(k)=(vcm(k)-valpha(k))
+ v2(k)=(vcat(k)-valpha(k))
+ enddo
+ v1m = sqrt(v1(1)**2+v1(2)**2+v1(3)**2)
+ v2m = sqrt(v2(1)**2+v2(2)**2+v2(3)**2)
+ v1dpv2 = v1(1)*v2(1)+v1(2)*v2(2)+v1(3)*v2(3)
+! The weights of the energy function calculated from
+!The quantum mechanical GAMESS simulations of ASN/GLN with calcium
+ ndiv=1.0
+ if ((itype(j,5).eq.1).or.(itype(j,5).eq.3)) ndiv=2.0
+
+ wh2o=78*ndiv
+ wdip =vcatprm(2)
+ wdip=wdip/wh2o
+ wquad1 =vcatprm(3)
+ wquad1=wquad1/wh2o
+ wquad2 = vcatprm(4)
+ wquad2=wquad2/wh2o
+ wquad2p = 1-wquad2
+ wvan1 = vcatprm(5)
+ wvan2 =vcatprm(6)
+ opt = dx(1)**2+dx(2)**2
+ rsecp = opt+dx(3)**2
+ rs = sqrt(rsecp)
+ rthrp = rsecp*rs
+ rfourp = rthrp*rs
+ rsixp = rfourp*rsecp
+ reight=rsixp*rsecp
+ Ir = 1.0d0/rs
+ Irsecp = 1/rsecp
+ Irthrp = Irsecp/rs
+ Irfourp = Irthrp/rs
+ Irsixp = 1/rsixp
+ Ireight=1/reight
+ Irtw=Irsixp*Irsixp
+ Irthir=Irtw/rs
+ Irfourt=Irthir/rs
+ opt1 = (4*rs*dx(3)*wdip)
+ opt2 = 6*rsecp*wquad1*opt
+ opt3 = wquad1*wquad2p*Irsixp
+ opt4 = (wvan1*wvan2**12)
+ opt5 = opt4*12*Irfourt
+ opt6 = 2*wvan1*wvan2**6
+ opt7 = 6*opt6*Ireight
+ opt8 = wdip/v1m
+ opt10 = wdip/v2m
+ opt11 = (rsecp*v2m)**2
+ opt12 = (rsecp*v1m)**2
+ opt14 = (v1m*v2m*rsecp)**2
+ opt15 = -wquad1/v2m**2
+ opt16 = (rthrp*(v1m*v2m)**2)**2
+ opt17 = (v1m**2*rthrp)**2
+ opt18 = -wquad1/rthrp
+ opt19 = (v1m**2*v2m**2)**2
+ Edip=opt8*(v1dpv2)/(rsecp*v2m)
+ do k=1,3
+ dEdipCat(k)=opt8*(v1(k)*rsecp*v2m-((v2(k)/v2m&
+ *rsecp+2*dx(k)*v2m)*v1dpv2))/opt11
+ dEdipCm(k)=opt10*(v2(k)*rsecp*v1m-((v1(k)/v1m&
+ *rsecp-2*dx(k)*v1m)*v1dpv2))/opt12
+ dEdipCalp(k)=wdip*((-v1(k)-v2(k))*rsecp*v1m&
+ *v2m-(-v1(k)/v1m*v2m*rsecp-v2(k)/v2m*v1m*rsecp)&
+ *v1dpv2)/opt14
+ enddo
+ Equad1=-wquad1*v1dpv2**2/(rthrp*(v1m*v2m)**2)
+ do k=1,3
+ dEquad1Cat(k)=-wquad1*(2*v1(k)*v1dpv2*(rthrp*&
+ (v1m*v2m)**2)-(3*dx(k)*rs*(v1m*v2m)**2+2*v1m*2*&
+ v2(k)*1/2*1/v2m*v1m*v2m*rthrp)*v1dpv2**2)/opt16
+ dEquad1Cm(k)=-wquad1*(2*v2(k)*v1dpv2*(rthrp*&
+ (v1m*v2m)**2)-(-3*dx(k)*rs*(v1m*v2m)**2+2*v2m*2*&
+ v1(k)*1/2*1/v1m*v2m*v1m*rthrp)*v1dpv2**2)/opt16
+ dEquad1Calp(k)=opt18*(2*(-v1(k)-v2(k))*v1dpv2* &
+ v1m**2*v2m**2-(-2*v1(k)*v2m**2-2*v2(k)*v1m**2)*&
+ v1dpv2**2)/opt19
+ enddo
+ Equad2=wquad1*wquad2p*Irthrp
+ do k=1,3
+ dEquad2Cat(k)=-3*dx(k)*rs*opt3
+ dEquad2Cm(k)=3*dx(k)*rs*opt3
+ dEquad2Calp(k)=0.0d0
+ enddo
+ Evan1=opt4*Irtw
+ do k=1,3
+ dEvan1Cat(k)=-dx(k)*opt5
+ dEvan1Cm(k)=dx(k)*opt5
+ dEvan1Calp(k)=0.0d0
+ enddo
+ Evan2=-opt6*Irsixp
+ do k=1,3
+ dEvan2Cat(k)=dx(k)*opt7
+ dEvan2Cm(k)=-dx(k)*opt7
+ dEvan2Calp(k)=0.0d0
+ enddo
+ ecation_prot = ecation_prot+Edip+Equad1+Equad2+Evan1+Evan2
+ do k=1,3
+ dEtotalCat(k)=dEdipCat(k)+dEquad1Cat(k)+ &
+ dEquad2Cat(k)+dEvan1Cat(k)+dEvan2Cat(k)
+ dEtotalCm(k)=dEdipCm(k)+dEquad1Cm(k)+ &
+ dEquad2Cm(k)+dEvan1Cm(k)+dEvan2Cm(k)
+ dEtotalCalp(k)=dEdipCalp(k)+dEquad1Calp(k) &
+ +dEquad2Calp(k)+dEvan1Calp(k)+dEvan2Calp(k)
+ enddo
+ dscmag = 0.0d0
+ do k=1,3
+ dscvec(k) = c(k,i+nres)-c(k,i)
+! TU SPRAWDZ???
+! dscvec(1) = xj
+! dscvec(2) = yj
+! dscvec(3) = zj
+
+ dscmag = dscmag+dscvec(k)*dscvec(k)
+ enddo
+ dscmag3 = dscmag
+ dscmag = sqrt(dscmag)
+ dscmag3 = dscmag3*dscmag
+ constA = 1+dASGL/dscmag
+ constB = 0.0d0
+ do k=1,3
+ constB = constB+dscvec(k)*dEtotalCm(k)
+ enddo
+ constB = constB*dASGL/dscmag3
+ do k=1,3
+ gg(k) = dEtotalCm(k)+dEtotalCalp(k)
+ gradpepcatx(k,i)=gradpepcatx(k,i)+ &
+ constA*dEtotalCm(k)-constB*dscvec(k)
+ gradpepcat(k,i)=gradpepcat(k,i)+gg(k)
+ gradpepcat(k,j)=gradpepcat(k,j)+dEtotalCat(k)
+ enddo
+ else
+ rcal = 0.0d0
+ do k=1,3
+! r(k) = c(k,j)-c(k,i+nres)
+ r(1) = xj
+ r(2) = yj
+ r(3) = zj
+ rcal = rcal+r(k)*r(k)
+ enddo
+ ract=sqrt(rcal)
+ rocal=1.5
+ epscalc=0.2
+ r0p=0.5*(rocal+sig0(itype(i,1)))
+ r06 = r0p**6
+ r012 = r06*r06
+ Evan1=epscalc*(r012/rcal**6)
+ Evan2=epscalc*2*(r06/rcal**3)
+ r4 = rcal**4
+ r7 = rcal**7
+ do k=1,3
+ dEvan1Cm(k) = 12*r(k)*epscalc*r012/r7
+ dEvan2Cm(k) = 12*r(k)*epscalc*r06/r4
+ enddo
+ do k=1,3
+ dEtotalCm(k)=dEvan1Cm(k)+dEvan2Cm(k)
+ enddo
+ ecation_prot = ecation_prot+ Evan1+Evan2
+ do k=1,3
+ gradpepcatx(k,i)=gradpepcatx(k,i)+ &
+ dEtotalCm(k)
+ gradpepcat(k,i)=gradpepcat(k,i)+dEtotalCm(k)
+ gradpepcat(k,j)=gradpepcat(k,j)-dEtotalCm(k)
+ enddo
+ endif ! 13-16 residues
+ enddo !j
+ enddo !i
+ return
+ end subroutine ecat_prot
+
+!----------------------------------------------------------------------------
+!---------------------------------------------------------------------------
+ subroutine ecat_nucl(ecation_nucl)
+ integer i,j,k,subchap,itmp,inum,itypi,itypj
+ real(kind=8) :: xi,yi,zi,xj,yj,zj
+ real(kind=8) xj_temp,yj_temp,zj_temp,xj_safe,yj_safe,zj_safe, &
+ dist_init,dist_temp,ecation_nucl,Evan1,Evan2,Ecav,Egb,wdip1,wdip2, &
+ wvan1,wvan2,wgbsig,wgbeps,wgbchi,wgbchip,wcav1,wcav2,wcav3,wcav4, &
+ wcavsig,wcavchi,v1m,v1dpdx,wh2o,wc,Edip,rcs2,invrcs6,invrcs8,invrcs12, &
+ invrcs14,rcb,rcb2,invrcb,invrcb2,invrcb4,invrcb6,cosinus,cos2,dcosdcatconst, &
+ dcosdcalpconst,dcosdcmconst,rcav,rcav11,rcav12,constcav1,constcav2, &
+ constgb1,constgb2,constdvan1,constdvan2,sgb,sgb6,sgb7,sgb12,sgb13, &
+ cavnum,cavdenom,invcavdenom2,dcavnumdcos,dcavnumdr,dcavdenomdcos, &
+ dcavdenomdr,sslipi,ssgradlipi,sslipj,ssgradlipj,aa,bb
+ real(kind=8),dimension(3) ::gg,r,dEtotalCm,dEtotalCalp,dEvan1Cm,&
+ dEvan2Cm,cm1,cm,vcat,vsug,v1,v2,dx,vcm,dEdipCm,dEdipCalp, &
+ dEvan1Calp,dEvan2Cat,dEvan2Calp,dEtotalCat,dEdipCat,dEvan1Cat,dcosdcat, &
+ dcosdcalp,dcosdcm,dEgbdCat,dEgbdCalp,dEgbdCm,dEcavdCat,dEcavdCalp, &
+ dEcavdCm,boxik
+ real(kind=8),dimension(14) :: vcatnuclprm
+ ecation_nucl=0.0d0
+ boxik(1)=boxxsize
+ boxik(2)=boxysize
+ boxik(3)=boxzsize
+
+ if (nres_molec(5).eq.0) return
+ itmp=0
+ do i=1,4
+ itmp=itmp+nres_molec(i)
+ enddo
+ do i=iatsc_s_nucl,iatsc_e_nucl
+ if ((itype(i,2).eq.ntyp1_molec(2))) cycle ! leave dummy atoms
+ xi=(c(1,i+nres))
+ yi=(c(2,i+nres))
+ zi=(c(3,i+nres))
+ call to_box(xi,yi,zi)
+ call lipid_layer(xi,yi,zi,sslipi,ssgradlipi)
+ do k=1,3
+ cm1(k)=dc(k,i+nres)
+ enddo
+ do j=itmp+1,itmp+nres_molec(5)
+ xj=c(1,j)
+ yj=c(2,j)
+ zj=c(3,j)
+ call to_box(xj,yj,zj)
+! write(iout,*) "xi,yi,zi,xj,yj,zj", xi,yi,zi,xj,yj,zj
+! call lipid_layer(xj,yj,zj,sslipj,ssgradlipj)
+! aa=aa_lip(itypi,itypj)*(sslipi+sslipj)/2.0d0 &
+! +aa_aq(itypi,itypj)*(2.0d0-sslipi-sslipj)/2.0d0
+! bb=bb_lip(itypi,itypj)*(sslipi+sslipj)/2.0d0 &
+! +bb_aq(itypi,itypj)*(2.0d0-sslipi-sslipj)/2.0d0
+ xj=boxshift(xj-xi,boxxsize)
+ yj=boxshift(yj-yi,boxysize)
+ zj=boxshift(zj-zi,boxzsize)
+! write(iout,*) 'after shift', xj,yj,zj
+ dist_init=xj**2+yj**2+zj**2
+
+ itypi=itype(i,2)
+ itypj=itype(j,5)
+ do k=1,13
+ vcatnuclprm(k)=catnuclprm(k,itypi,itypj)
+ enddo
+ do k=1,3
+ vcm(k)=c(k,i+nres)
+ vsug(k)=c(k,i)
+ vcat(k)=c(k,j)
+ enddo
+ call to_box(vcm(1),vcm(2),vcm(3))
+ call to_box(vsug(1),vsug(2),vsug(3))
+ call to_box(vcat(1),vcat(2),vcat(3))
+ do k=1,3
+! dx(k) = vcat(k)-vcm(k)
+! enddo
+ dx(k)=boxshift(vcat(k)-vcm(k),boxik(k))
+! do k=1,3
+ v1(k)=dc(k,i+nres)
+ v2(k)=boxshift(vcat(k)-vsug(k),boxik(k))
+ enddo
+ v1m = sqrt(v1(1)**2+v1(2)**2+v1(3)**2)
+ v1dpdx = v1(1)*dx(1)+v1(2)*dx(2)+v1(3)*dx(3)
+! The weights of the energy function calculated from
+!The quantum mechanical Gaussian simulations of potassium and sodium with deoxynucleosides
+ wh2o=78
+ wdip1 = vcatnuclprm(1)
+ wdip1 = wdip1/wh2o !w1
+ wdip2 = vcatnuclprm(2)
+ wdip2 = wdip2/wh2o !w2
+ wvan1 = vcatnuclprm(3)
+ wvan2 = vcatnuclprm(4) !pis1
+ wgbsig = vcatnuclprm(5) !sigma0
+ wgbeps = vcatnuclprm(6) !epsi0
+ wgbchi = vcatnuclprm(7) !chi1
+ wgbchip = vcatnuclprm(8) !chip1
+ wcavsig = vcatnuclprm(9) !sig
+ wcav1 = vcatnuclprm(10) !b1
+ wcav2 = vcatnuclprm(11) !b2
+ wcav3 = vcatnuclprm(12) !b3
+ wcav4 = vcatnuclprm(13) !b4
+ wcavchi = vcatnuclprm(14) !chis1
+ rcs2 = v2(1)**2+v2(2)**2+v2(3)**2
+ invrcs6 = 1/rcs2**3
+ invrcs8 = invrcs6/rcs2
+ invrcs12 = invrcs6**2
+ invrcs14 = invrcs12/rcs2
+ rcb2 = dx(1)**2+dx(2)**2+dx(3)**2
+ rcb = sqrt(rcb2)
+ invrcb = 1/rcb
+ invrcb2 = invrcb**2
+ invrcb4 = invrcb2**2
+ invrcb6 = invrcb4*invrcb2
+ cosinus = v1dpdx/(v1m*rcb)
+ cos2 = cosinus**2
+ dcosdcatconst = invrcb2/v1m
+ dcosdcalpconst = invrcb/v1m**2
+ dcosdcmconst = invrcb2/v1m**2
+ do k=1,3
+ dcosdcat(k) = (v1(k)*rcb-dx(k)*v1m*cosinus)*dcosdcatconst
+ dcosdcalp(k) = (v1(k)*rcb*cosinus-dx(k)*v1m)*dcosdcalpconst
+ dcosdcm(k) = ((dx(k)-v1(k))*v1m*rcb+ &
+ cosinus*(dx(k)*v1m**2-v1(k)*rcb2))*dcosdcmconst
+ enddo
+ rcav = rcb/wcavsig
+ rcav11 = rcav**11
+ rcav12 = rcav11*rcav
+ constcav1 = 1-wcavchi*cos2
+ constcav2 = sqrt(constcav1)
+ constgb1 = 1/sqrt(1-wgbchi*cos2)
+ constgb2 = wgbeps*(1-wgbchip*cos2)**2
+ constdvan1 = 12*wvan1*wvan2**12*invrcs14
+ constdvan2 = 6*wvan1*wvan2**6*invrcs8
+!----------------------------------------------------------------------------
+!Gay-Berne term
+!---------------------------------------------------------------------------
+ sgb = 1/(1-constgb1+(rcb/wgbsig))
+ sgb6 = sgb**6
+ sgb7 = sgb6*sgb
+ sgb12 = sgb6**2
+ sgb13 = sgb12*sgb
+ Egb = constgb2*(sgb12-sgb6)
+ do k=1,3
+ dEgbdCat(k) = -constgb2/wgbsig*(12*sgb13-6*sgb7)*invrcb*dx(k) &
+ +(constgb1**3*constgb2*wgbchi*cosinus*(12*sgb13-6*sgb7) &
+ -4*wgbeps*wgbchip*cosinus*(1-wgbchip*cos2)*(sgb12-sgb6))*dcosdcat(k)
+ dEgbdCm(k) = constgb2/wgbsig*(12*sgb13-6*sgb7)*invrcb*dx(k) &
+ +(constgb1**3*constgb2*wgbchi*cosinus*(12*sgb13-6*sgb7) &
+ -4*wgbeps*wgbchip*cosinus*(1-wgbchip*cos2)*(sgb12-sgb6))*dcosdcm(k)
+ dEgbdCalp(k) = (constgb1**3*constgb2*wgbchi*cosinus &
+ *(12*sgb13-6*sgb7) &
+ -4*wgbeps*wgbchip*cosinus*(1-wgbchip*cos2)*(sgb12-sgb6))*dcosdcalp(k)
+ enddo
+!----------------------------------------------------------------------------
+!cavity term
+!---------------------------------------------------------------------------
+ cavnum = sqrt(rcav*constcav2)+wcav2*rcav*constcav2-wcav3
+ cavdenom = 1+wcav4*rcav12*constcav1**6
+ Ecav = wcav1*cavnum/cavdenom
+ invcavdenom2 = 1/cavdenom**2
+ dcavnumdcos = -wcavchi*cosinus/constcav2 &
+ *(sqrt(rcav/constcav2)/2+wcav2*rcav)
+ dcavnumdr = (0.5*sqrt(constcav2/rcav)+wcav2*constcav2)/wcavsig
+ dcavdenomdcos = -12*wcav4*wcavchi*rcav12*constcav1**5*cosinus
+ dcavdenomdr = 12*wcav4/wcavsig*rcav11*constcav1**6
+ do k=1,3
+ dEcavdCat(k) = ((dcavnumdcos*cavdenom-dcavdenomdcos*cavnum) &
+ *dcosdcat(k)+(dcavnumdr*cavdenom-dcavdenomdr*cavnum)/rcb*dx(k))*wcav1*invcavdenom2
+ dEcavdCm(k) = ((dcavnumdcos*cavdenom-dcavdenomdcos*cavnum) &
+ *dcosdcm(k)-(dcavnumdr*cavdenom-dcavdenomdr*cavnum)/rcb*dx(k))*wcav1*invcavdenom2
+ dEcavdCalp(k) = (dcavnumdcos*cavdenom-dcavdenomdcos*cavnum) &
+ *dcosdcalp(k)*wcav1*invcavdenom2
+ enddo
+!----------------------------------------------------------------------------
+!van der Waals and dipole-charge interaction energy
+!---------------------------------------------------------------------------
+ Evan1 = wvan1*wvan2**12*invrcs12
+ do k=1,3
+ dEvan1Cat(k) = -v2(k)*constdvan1
+ dEvan1Cm(k) = 0.0d0
+ dEvan1Calp(k) = v2(k)*constdvan1
+ enddo
+ Evan2 = -wvan1*wvan2**6*invrcs6
+ do k=1,3
+ dEvan2Cat(k) = v2(k)*constdvan2
+ dEvan2Cm(k) = 0.0d0
+ dEvan2Calp(k) = -v2(k)*constdvan2
+ enddo
+ Edip = wdip1*cosinus*invrcb2-wdip2*(1-cos2)*invrcb4
+ do k=1,3
+ dEdipCat(k) = (-2*wdip1*cosinus*invrcb4 &
+ +4*wdip2*(1-cos2)*invrcb6)*dx(k) &
+ +dcosdcat(k)*(wdip1*invrcb2+2*wdip2*cosinus*invrcb4)
+ dEdipCm(k) = (2*wdip1*cosinus*invrcb4 &
+ -4*wdip2*(1-cos2)*invrcb6)*dx(k) &
+ +dcosdcm(k)*(wdip1*invrcb2+2*wdip2*cosinus*invrcb4)
+ dEdipCalp(k) = dcosdcalp(k)*(wdip1*invrcb2 &
+ +2*wdip2*cosinus*invrcb4)
+ enddo
+ if (energy_dec) write (iout,'(2i5,4(a6,f7.3))') i,j, &
+ ' E GB ',Egb,' ECav ',Ecav,' Evdw ',Evan1+Evan2,' Edip ',Edip
+ ecation_nucl=ecation_nucl+Ecav+Egb+Edip+Evan1+Evan2
+ do k=1,3
+ dEtotalCat(k) = dEcavdCat(k)+dEvan1Cat(k)+dEvan2Cat(k) &
+ +dEgbdCat(k)+dEdipCat(k)
+ dEtotalCm(k) = dEcavdCm(k)+dEvan1Cm(k)+dEvan2Cm(k) &
+ +dEgbdCm(k)+dEdipCm(k)
+ dEtotalCalp(k) = dEcavdCalp(k)+dEgbdCalp(k)+dEvan1Calp(k) &
+ +dEdipCalp(k)+dEvan2Calp(k)
+ enddo
+ do k=1,3
+ gg(k) = dEtotalCm(k)+dEtotalCalp(k)
+ gradnuclcatx(k,i)=gradnuclcatx(k,i)+dEtotalCm(k)
+ gradnuclcat(k,i)=gradnuclcat(k,i)+gg(k)
+ gradnuclcat(k,j)=gradnuclcat(k,j)+dEtotalCat(k)
+ enddo
+ enddo !j
+ enddo !i
+ return
+ end subroutine ecat_nucl
+
+!-----------------------------------------------------------------------------
+!-----------------------------------------------------------------------------
+ subroutine eprot_sc_base(escbase)
+ use calc_data
+! implicit real*8 (a-h,o-z)
+! include 'DIMENSIONS'
+! include 'COMMON.GEO'
+! include 'COMMON.VAR'
+! include 'COMMON.LOCAL'
+! include 'COMMON.CHAIN'
+! include 'COMMON.DERIV'
+! include 'COMMON.NAMES'
+! include 'COMMON.INTERACT'
+! include 'COMMON.IOUNITS'
+! include 'COMMON.CALC'
+! include 'COMMON.CONTROL'
+! include 'COMMON.SBRIDGE'
+ logical :: lprn
+!el local variables
+ integer :: iint,itypi,itypi1,itypj,subchap
+ real(kind=8) :: rrij,xi,yi,zi,sig,rij_shift,fac,e1,e2,sigm,epsi
+ real(kind=8) :: evdw,sig0ij
+ real(kind=8) :: xj_safe,yj_safe,zj_safe,xj_temp,yj_temp,zj_temp,&
+ dist_temp, dist_init,aa,bb,ssgradlipi,ssgradlipj, &
+ sslipi,sslipj,faclip
+ integer :: ii
+ real(kind=8) :: fracinbuf
+ real (kind=8) :: escbase
+ real (kind=8),dimension(4):: ener
+ real(kind=8) :: b1,b2,b3,b4,egb,eps_in,eps_inout_fac,eps_out
+ real(kind=8) :: ECL,Elj,Equad,Epol,eheadtail,rhead,dGCLOM2,&
+ sqom1,sqom2,sqom12,c1,c2,c3,pom,Lambf,sparrow,&
+ Chif,ChiLambf,bat,eagle,top,bot,botsq,Fcav,dtop,dFdR,dFdOM1,&
+ dFdOM2,w1,w2,w3,dGCLdR,dFdL,dFdOM12,dbot ,&
+ r1,eps_head,alphapol1,pis,facd2,d2,facd1,d1,erdxj,erdxi,federmaus,&
+ dPOLdR1,dFGBdOM2,dFGBdR1,dPOLdFGB1,RR1,MomoFac1,hawk,d1i,d1j,&
+ sig1,sig2,chis12,chis2,ee1,fgb1,a12sq,chis1
+ real(kind=8),dimension(3,2)::chead,erhead_tail
+ real(kind=8),dimension(3) :: Rhead_distance,ertail,erhead
+ integer troll
+ eps_out=80.0d0
+ escbase=0.0d0
+! do i=1,nres_molec(1)
+ do i=ibond_start,ibond_end
+ if (itype(i,1).eq.ntyp1_molec(1)) cycle
+ itypi = itype(i,1)
+ dxi = dc_norm(1,nres+i)
+ dyi = dc_norm(2,nres+i)
+ dzi = dc_norm(3,nres+i)
+ dsci_inv = vbld_inv(i+nres)
+ xi=c(1,nres+i)
+ yi=c(2,nres+i)
+ zi=c(3,nres+i)
+ call to_box(xi,yi,zi)
+ call lipid_layer(xi,yi,zi,sslipi,ssgradlipi)
+ do j=nres_molec(1)+1,nres_molec(2)+nres_molec(1)
+ itypj= itype(j,2)
+ if (itype(j,2).eq.ntyp1_molec(2))cycle
+ xj=c(1,j+nres)
+ yj=c(2,j+nres)
+ zj=c(3,j+nres)
+ call to_box(xj,yj,zj)
+! call lipid_layer(xj,yj,zj,sslipj,ssgradlipj)
+! aa=aa_lip(itypi,itypj)*(sslipi+sslipj)/2.0d0 &
+! +aa_aq(itypi,itypj)*(2.0d0-sslipi-sslipj)/2.0d0
+! bb=bb_lip(itypi,itypj)*(sslipi+sslipj)/2.0d0 &
+! +bb_aq(itypi,itypj)*(2.0d0-sslipi-sslipj)/2.0d0
+ xj=boxshift(xj-xi,boxxsize)
+ yj=boxshift(yj-yi,boxysize)
+ zj=boxshift(zj-zi,boxzsize)
+
+ dxj = dc_norm( 1, nres+j )
+ dyj = dc_norm( 2, nres+j )
+ dzj = dc_norm( 3, nres+j )
+! print *,i,j,itypi,itypj
+ d1i = dhead_scbasei(itypi,itypj) !this is shift of dipole/charge
+ d1j = dhead_scbasej(itypi,itypj) !this is shift of dipole/charge
+! d1i=0.0d0
+! d1j=0.0d0
+! BetaT = 1.0d0 / (298.0d0 * Rb)
+! Gay-berne var's
+ sig0ij = sigma_scbase( itypi,itypj )
+ chi1 = chi_scbase( itypi, itypj,1 )
+ chi2 = chi_scbase( itypi, itypj,2 )
+! chi1=0.0d0
+! chi2=0.0d0
+ chi12 = chi1 * chi2
+ chip1 = chipp_scbase( itypi, itypj,1 )
+ chip2 = chipp_scbase( itypi, itypj,2 )
+! chip1=0.0d0
+! chip2=0.0d0
+ chip12 = chip1 * chip2
+! not used by momo potential, but needed by sc_angular which is shared