VPUBLIC void VbuildA(int *nx, int *ny, int *nz, int *ipkey, int *mgdisc, int *numdia, int *ipc, double *rpc, double *ac, double *cc, double *fc, double *xf, double *yf, double *zf, double *gxcf, double *gycf, double *gzcf, double *a1cf, double *a2cf, double *a3cf, double *ccf, double *fcf)
Build the Laplacian.