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| void sphere(char * fname,scalar s, coord center, double radius, int maxlevel){
FILE *fpver = fopen (fname,"a");
int nn = (1<<maxlevel);
double ** field = matrix_new (nn, 2*nn, sizeof(double));
double stp = M_PI/(double)nn;
for (int i = 0; i < nn; i++){//theta
double thetap = stp*i + stp/2.;
for (int j = 0; j < 2*nn; j++) {//phi
double phip = stp*j + stp/2.;
double xp = center.x + radius*sin(thetap)*cos(phip);
double yp = center.y + radius*sin(thetap)*sin(phip);
double zp = center.z + radius*cos(thetap);
Point point = locate (xp, yp, zp);
field[i][j] = point.level >= 0 ? interpolate(s,xp,yp,zp) : nodata;
}
}
if (pid() == 0){ // master
#if _MPI
MPI_Reduce (MPI_IN_PLACE, field[0], 2*sq(nn), MPI_DOUBLE, MPI_MIN, 0,
MPI_COMM_WORLD);
#endif
for (int i = 0; i < nn; i++) {
for (int j = 0; j < nn; j++) {
fprintf (fpver, "%g\t", field[i][j]);
}
fputc ('\n', fpver);
}
fflush (fpver);
}
#if _MPI
else // slave
MPI_Reduce (field[0], NULL, 2*nn*nn, MPI_DOUBLE, MPI_MIN, 0,
MPI_COMM_WORLD);
#endif
matrix_free (field);
}
|
