Mathc initiation/Fichiers h : c60a6


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x_surfxz.h
/* ---------------------------------- */
/* save as x_surfxz.h                 */
/* ---------------------------------- */
double    Sint_dxz(
double (*P_g)(double x, double y, double z),

double (*P_h)(double x, double z),
double (*P_u)(double z),
double (*P_v)(double z),
   int nx,
   
double z
)
{
pt2d    p;

   int i = 0;
double m = 0.;
double M = 0.;

 for(i = 0; i <= nx; i++)
 {
       if(i ==0 || i== nx){m = 1.;}
  else if(fmod(i,2) == 0){m = 2.;}
  else                   {m = 4.;}

        p.x = ((*P_u)(z)) + i*(((*P_v)(z))-((*P_u)(z)))/nx;
        p.y = z;

  M += m * (      (*P_g)(p.x,(*P_h)(p.x,p.y),p.y)  *
                    sqrt( pow(fxy_x((*P_h),H,p),2) +
                          pow(fxy_y((*P_h),H,p),2) +
                          1));
 }

  return( ((((*P_v)(z)) -((*P_u)(z)))*M) / (3*nx) );
}
/* ---------------------------------- */
double surface_dxdz(
double (*P_g)(double x, double y, double z),
double (*P_h)(double x, double z),

double (*P_u)(double z),
double (*P_v)(double z),
   int nx,
   
double az,
double bz,
   int nz
)
{
   int i = 0;
double m = 0.;
double M = 0.;

 for(i = 0; i <= nz; i++)
 {
       if(i ==0 || i== nz){m = 1.;}
  else if(fmod(i,2) == 0){m = 2.;}
  else                   {m = 4.;}

  M += m *              Sint_dxz( (*P_g),(*P_h),
                                  (*P_u),(*P_v), nx,
                                  (az + i*(bz-az)/nz));
 }

  return( ((bz -az)*M) / (3*nz) );
}
/* ---------------------------------- */
/* ---------------------------------- */


Déclaration des fichiers h.