Mathc initiation/a467

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	x_jwuv.h

/* --------------------------------- */
/* save as x_jwuv.h                  */
/* --------------------------------- */
double J_z_wuv(
double (*P_f)(double x, double y, double z),

double (*P_X)(double x, double y, double z),
double (*P_Y)(double x, double y, double z),
double (*P_Z)(double x, double y, double z),

double (*P_az)(double x, double y),
double (*P_bz)(double x, double y),
   int   nz,

double x,

double y
)
{
pt3d   p;
	
double z = 0;

   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.;}

  z = ((*P_az)(x,y)) + i*(((*P_bz)(x,y))-((*P_az)(x,y)))/nz;

  p.x = x;
  p.y = y;   
  p.z = z;    
     
  M += m * (*P_f)( ((*P_X)(x,y,z)), 
                   ((*P_Y)(x,y,z)), 
                   ((*P_Z)(x,y,z))) 
                         * 
                 /* Jacobian */   
                      
                    fabs(
                    
              fxyz_x((*P_X),H,p) 
                       * 
   ( fxyz_y((*P_Y),H,p)*fxyz_z((*P_Z),H,p)
                       -
     fxyz_z((*P_Y),H,p)*fxyz_y((*P_Z),H,p) ) 
     
                       - 
                                       
              fxyz_y((*P_X),H,p) 
                       * 
   ( fxyz_x((*P_Y),H,p)*fxyz_z((*P_Z),H,p)
                       -
     fxyz_z((*P_Y),H,p)*fxyz_x((*P_Z),H,p) )
     
                       + 
                                       
              fxyz_z((*P_X),H,p) 
                       * 
   ( fxyz_x((*P_Y),H,p)*fxyz_y((*P_Z),H,p)
                       -
     fxyz_y((*P_Y),H,p)*fxyz_x((*P_Z),H,p) )
                        );
 }

  return( ((((*P_bz)(x,y)) -((*P_az)(x,y)))*M) / (3*nz) );
}
/* --------------------------------- */
double J_x_wuv(
double (*P_f)(double x, double y, double z),

double (*P_X)(double x, double y, double z),
double (*P_Y)(double x, double y, double z),
double (*P_Z)(double x, double y, double z),
   
double (*P_az)(double x, double y),
double (*P_bz)(double x, double y),
   int   nz,

double (*P_ax)(double y),
double (*P_bx)(double y),
   int   nx,

double y
)
{
   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.;}

  M += m * J_z_wuv(       (*P_f),
                          (*P_X), (*P_Y),(*P_Z),
                          (*P_az),(*P_bz), nz,                                
                        (((*P_ax)(y))+i*(((*P_bx)(y))-((*P_ax)(y)))/nx),
                               y);
 }

 return( ((((*P_bx)(y)) -((*P_ax)(y)))*M) / (3*nx) );
}
/* --------------------------------- */
double J_wuv(
double (*P_f)(double x, double y, double z),

double (*P_X)(double x, double y, double z),
double (*P_Y)(double x, double y, double z),
double (*P_Z)(double x, double y, double z),
   
double (*P_az)(double x, double y),
double (*P_bz)(double x, double y),
   int   nz,
   
double (*P_ax)(double y),
double (*P_bx)(double y),
   int   nx,

double ay,
double by,
   int ny
)
{
   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 * J_x_wuv( (*P_f),
                    (*P_X), (*P_Y),(*P_Z),                               
                    (*P_az),(*P_bz),nz,
                    (*P_ax),(*P_bx),nx,
                    (ay+i*(by-ay)/ny));
 }

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

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