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/*@@
  @header   DZZDG_guts.h
  @date     Jun 98
  @author   Gabrielle Allen
  @desc
  Macro to calculate the (first and) second derivatives of the 
  physical metric with respect to z

  The macro is defined in terms of standard variables in
  @seefile DZZDG_declare.h

  The macro uses @seefile DZDG_guts.h and @seefile DZDG_declare.h
  @enddesc
@@*/

#ifndef DZZDG_GUTS
#define DZZDG_GUTS

#include "DZDG_guts.h"

#ifdef FCODE 

      DZZDG_OODZ2 = 1D0/(dz*dz)

      /* Factor involving 2nd derivative of conformal factor */ 
      IF (conformal_state .eq. 0) THEN
        DZZDG_FAC  = 0
      ELSE
        DZZDG_FAC  = DZDG_PSI4*(4*DZZDG_DZZDPSI_O_PSI + 12*DZDG_DZDPSI_O_PSI*DZDG_DZDPSI_O_PSI)
      ENDIF

      DZZDG_DZZDGXX = 2*DZDCG_DZDCGXX*DZDG_FAC+DZZDG_FAC*DZDG_GXX+DZDG_PSI4 \
     *DZZDG_OODZ2*(DZDCG_GXX_KP-2*DZDG_GXX+DZDCG_GXX_KM)

      DZZDG_DZZDGXY = 2*DZDCG_DZDCGXY*DZDG_FAC+DZZDG_FAC*DZDG_GXY+DZDG_PSI4 \
     *DZZDG_OODZ2*(DZDCG_GXY_KP-2*DZDG_GXY+DZDCG_GXY_KM)

      DZZDG_DZZDGXZ = 2*DZDCG_DZDCGXZ*DZDG_FAC+DZZDG_FAC*DZDG_GXZ+DZDG_PSI4 \
     *DZZDG_OODZ2*(DZDCG_GXZ_KP-2*DZDG_GXZ+DZDCG_GXZ_KM)

      DZZDG_DZZDGYY = 2*DZDCG_DZDCGYY*DZDG_FAC+DZZDG_FAC*DZDG_GYY+DZDG_PSI4 \
     *DZZDG_OODZ2*(DZDCG_GYY_KP-2*DZDG_GYY+DZDCG_GYY_KM)

      DZZDG_DZZDGYZ = 2*DZDCG_DZDCGYZ*DZDG_FAC+DZZDG_FAC*DZDG_GYZ+DZDG_PSI4 \
     *DZZDG_OODZ2*(DZDCG_GYZ_KP-2*DZDG_GYZ+DZDCG_GYZ_KM)

      DZZDG_DZZDGZZ = 2*DZDCG_DZDCGZZ*DZDG_FAC+DZZDG_FAC*DZDG_GZZ+DZDG_PSI4 \
     *DZZDG_OODZ2*(DZDCG_GZZ_KP-2*DZDG_GZZ+DZDCG_GZZ_KM)

#endif

#ifdef CCODE

      /* Factor involving 2nd derivative of conformal factor */ 
      DZZDG_FAC   = ((*conformal_state == 0)?0:
              DZDG_PSI4*(4*DZZDG_DZZDPSI_O_PSI + 12*DZDG_DZDPSI_O_PSI*DZDG_DZDPSI_O_PSI));

      /* Now calculate the second deriatives */
      DZZDG_DZZDGXX = 2*DZDCG_DZDCGXX*DZDG_FAC+DZZDG_FAC*DZDG_GXX+DZDG_PSI4
                *DZZDG_OODZ2*(DZDCG_GXX_KP-2*DZDG_GXX+DZDCG_GXX_KM);

      DZZDG_DZZDGXY = 2*DZDCG_DZDCGXY*DZDG_FAC+DZZDG_FAC*DZDG_GXY+DZDG_PSI4
                *DZZDG_OODZ2*(DZDCG_GXY_KP-2*DZDG_GXY+DZDCG_GXY_KM);

      DZZDG_DZZDGXZ = 2*DZDCG_DZDCGXZ*DZDG_FAC+DZZDG_FAC*DZDG_GXZ+DZDG_PSI4
                *DZZDG_OODZ2*(DZDCG_GXZ_KP-2*DZDG_GXZ+DZDCG_GXZ_KM);

      DZZDG_DZZDGYY = 2*DZDCG_DZDCGYY*DZDG_FAC+DZZDG_FAC*DZDG_GYY+DZDG_PSI4
                *DZZDG_OODZ2*(DZDCG_GYY_KP-2*DZDG_GYY+DZDCG_GYY_KM);

      DZZDG_DZZDGYZ = 2*DZDCG_DZDCGYZ*DZDG_FAC+DZZDG_FAC*DZDG_GYZ+DZDG_PSI4
                *DZZDG_OODZ2*(DZDCG_GYZ_KP-2*DZDG_GYZ+DZDCG_GYZ_KM);

      DZZDG_DZZDGZZ = 2*DZDCG_DZDCGZZ*DZDG_FAC+DZZDG_FAC*DZDG_GZZ+DZDG_PSI4
                *DZZDG_OODZ2*(DZDCG_GZZ_KP-2*DZDG_GZZ+DZDCG_GZZ_KM);

#endif

#endif