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/*@@
@header DXDCG_guts.h
@date Jun 98
@author Gabrielle Allen
@desc
Macro to calculate the first derivatives of the
conformal metric with respect to x
The macro is defined in terms of standard variables in
Requires: lower conformal metric at i+1,i-1 ; dx0
Provides: derivative of lower conformal metric wrt x
@seefile DXDCG_declare.h
@enddesc
@@*/
#ifndef DXDCG_GUTS
#define DXDCG_GUTS
#ifdef FCODE
DXDCG_OO2DX = 1D0/(2D0*DXDCG_DX)
DXDCG_DXDCGXX = DXDCG_OO2DX*(DXDCG_GXX_IP - DXDCG_GXX_IM)
DXDCG_DXDCGXY = DXDCG_OO2DX*(DXDCG_GXY_IP - DXDCG_GXY_IM)
DXDCG_DXDCGXZ = DXDCG_OO2DX*(DXDCG_GXZ_IP - DXDCG_GXZ_IM)
DXDCG_DXDCGYY = DXDCG_OO2DX*(DXDCG_GYY_IP - DXDCG_GYY_IM)
DXDCG_DXDCGYZ = DXDCG_OO2DX*(DXDCG_GYZ_IP - DXDCG_GYZ_IM)
DXDCG_DXDCGZZ = DXDCG_OO2DX*(DXDCG_GZZ_IP - DXDCG_GZZ_IM)
#endif
#ifdef CCODE
DXDCG_OO2DX = 1/(2*cctkGH->cctk_delta_space[0]);
DXDCG_DXDCGXX = DXDCG_OO2DX*(DXDCG_GXX_IP - DXDCG_GXX_IM);
DXDCG_DXDCGXY = DXDCG_OO2DX*(DXDCG_GXY_IP - DXDCG_GXY_IM);
DXDCG_DXDCGXZ = DXDCG_OO2DX*(DXDCG_GXZ_IP - DXDCG_GXZ_IM);
DXDCG_DXDCGYY = DXDCG_OO2DX*(DXDCG_GYY_IP - DXDCG_GYY_IM);
DXDCG_DXDCGYZ = DXDCG_OO2DX*(DXDCG_GYZ_IP - DXDCG_GYZ_IM);
DXDCG_DXDCGZZ = DXDCG_OO2DX*(DXDCG_GZZ_IP - DXDCG_GZZ_IM);
#endif
#endif
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