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/* Copyright (C) 2006 Massachusetts Institute of Technology
%
% This program is free software; you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation; either version 2, or (at your option)
% any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; if not, write to the Free Software Foundation,
% Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <meep.hpp>
using namespace meep;
double one(const vec &) { return 1.0; }
double slab(const vec &v) {
abort("not yet\n");
}
int radiating_2D(const double xmax) {
const double a = 10.0;
const double gridpts = a*xmax;
const double ymax = 3.0;
volume v = voltwo(xmax,ymax,a);
structure s(v, one, pml(ymax/3));
fields f(&s);
double w = 0.30;
double dx = 2.0;
continuous_src_time src(w);
f.add_point_source(Ez, src, vec(xmax/2 - dx, ymax/2));
vec p1(xmax/2 + 0*dx, ymax/2);
vec p2(xmax/2 + 1*dx, ymax/2);
// let the source reach steady state
f.solve_cw(1e-3);
complex<double> amp1 = f.get_field(Ez, p1);
complex<double> amp2 = f.get_field(Ez, p2);
double ratio = pow(abs(amp1)/abs(amp2), 2.0) ;
printf("Ratio is %g from (%g %g) and (%g %g)\n",
ratio, real(amp1), imag(amp1), real(amp2), imag(amp2));
if (ratio > 2.12 || ratio < 1.88)
abort("Failed: amp1 = (%g, %g), amp2 = (%g, %g)\n abs(amp1/amp2)^2 = %g, too far from 2.0\n",
real(amp1), imag(amp1), real(amp2), imag(amp2), ratio);
return 1;
}
int radiating_3D() {
const double a = 10.0;
const double pml_thickness = 1.0;
const double ymax = 0.4 + 2*pml_thickness;
const double zmax = ymax;
const double w = 0.30;
const double xmax = 8.0;
const double dx = (xmax/2 - pml_thickness)/2 - 2/a;
volume v = vol3d(xmax,ymax,zmax,a);
symmetry S = mirror(X,v) + mirror(Y,v) + mirror(Z,v)*(-1.0);
structure s(v, one, pml(pml_thickness), S);
fields f(&s);
continuous_src_time src(w);
f.add_point_source(Ez, src, vec(xmax/2, ymax/2, zmax/2));
vec p1(xmax/2 + dx, ymax/2, zmax/2);
vec p2(xmax/2 + 2*dx, ymax/2, zmax/2);
// let the source reach steady state
f.solve_cw(1e-3, 10000, 4);
complex<double> amp1 = f.get_field(Ez, p1);
complex<double> amp2 = f.get_field(Ez, p2);
const double ratio = abs(amp1)/abs(amp2);
printf("Ratio is %g from (%g %g) and (%g %g)\n",
ratio, real(amp1), imag(amp1), real(amp2), imag(amp2));
if (ratio > 2.05 || ratio < 1.87)
abort("Failed: amp1 = (%g, %g), amp2 = (%g, %g)\n abs(amp1/amp2)^2 = %g, too far from 2.0\n",
real(amp1), imag(amp1), real(amp2), imag(amp2), ratio);
return 1;
}
void attempt(const char *name, int allright) {
if (allright) master_printf("Passed %s\n", name);
else abort("Failed %s!\n", name);
}
int main(int argc, char **argv) {
initialize mpi(argc, argv);
// quiet = true;
master_printf("Trying out some physical tests...\n");
attempt("radiating source should decay spatially as 1/sqrt(r) in 2D.", radiating_2D(8.0));
attempt("radiating source should decay spatially as 1/r in 3D.", radiating_3D());
return 0;
}
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