Mathc initiation/Fichiers h : c60a5

Un livre de Wikilivres.
Aller à la navigation Aller à la recherche


Sommaire


Installer ce fichier dans votre répertoire de travail.

Crystal Clear mimetype source h.png x_surfxy.h
/* ---------------------------------- */
/* save as x_surfxy.h                 */
/* ---------------------------------- */
double   sint_dxy(
double (*P_g)(double x, double y, double z),

double (*P_f)(double x, double y),

double (*P_u)(double y),
double (*P_v)(double y),
   int nx,
   
double  y,

double  h
)
{
p2d 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)(y)) + i*(((*P_v)(y))-((*P_u)(y)))/nx;
        p.y = y;

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

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

double (*P_u)(double y),
double (*P_v)(double y),
   int nx,
   
double ay,
double by,
   int ny,
   
double h
)
{
   int i = 0;
double m = 0.;
double M = 0.;

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

  M += m * sint_dxy( (*P_g),(*P_f),
                    (*P_u),(*P_v),
                    nx,                                   
                    (ay + i*(by-ay)/ny),
                     h);
 }

  return( ((by -ay)*M) / (3*ny) );
}
/* ---------------------------------- */
/* ---------------------------------- */


Déclaration des fichiers h.