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| /* parallel boundary conditions for fluxes */
int main (int argc, char ** argv)
{
int minlevel = argc > 1 ? atoi(argv[1]) : 5;
init_grid (1);
refine (level <= minlevel*(1. - sqrt(sq((y - 0.5) - 0.1) +
sq((0.5 - x) - 0.1))));
output_cells (stdout);
scalar s[];
foreach()
s[] = noise();
face vector g[];
foreach_face()
g.x[] = (s[] - s[-1,0])/Delta;
foreach_face(x)
fprintf (stderr, "%g %g %g\n", x, y, g.x[]);
double sum = 0.;
foreach (reduction(+:sum))
sum += Delta*(g.x[1,0] - g.x[] + g.y[0,1] - g.y[]);
fprintf (stderr, "sum: %g\n", sum);
assert (fabs(sum) < 1e-10);
}
|
