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array-slice-ll.cpp
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array-slice-ll.cpp
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/***************************************************************/
/***************************************************************/
/***************************************************************/
#include <memory>
#include <vector>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <complex>
#include "meep.hpp"
#include "ctl-math.h"
#include "ctlgeom.h"
#include "meepgeom.hpp"
#ifndef DATADIR
#define DATADIR "./"
#endif
using namespace meep;
vector3 v3(double x, double y = 0.0, double z = 0.0) {
vector3 v;
v.x = x;
v.y = y;
v.z = z;
return v;
}
// passthrough field function
std::complex<double> default_field_function(const std::complex<double> *fields, const vec &loc, void *data_) {
(void)loc; // unused
(void)data_; // unused
return fields[0];
}
/***************************************************************/
/***************************************************************/
/***************************************************************/
const double RELTOL = sizeof(realnum) == sizeof(float) ? 1.0e-4: 1.0e-6;
double Compare(realnum *d1, realnum *d2, int N, const char *Name) {
double Norm1 = 0.0, Norm2 = 0.0, NormDelta = 0.0;
for (int n = 0; n < N; n++) {
Norm1 += d1[n] * d1[n];
Norm2 += d2[n] * d2[n];
NormDelta += (d1[n] - d2[n]) * (d1[n] - d2[n]);
};
Norm1 = sqrt(Norm1);
Norm2 = sqrt(Norm2);
NormDelta = sqrt(NormDelta);
double RelErr = NormDelta / (0.5 * (Norm1 + Norm2));
if (RelErr > RELTOL) meep::abort("fail: rel error in %s data = %e\n", Name, RelErr);
return RelErr;
}
double Compare(std::complex<realnum> *d1, std::complex<realnum> *d2, int N, const char *Name) {
double Norm1 = 0.0, Norm2 = 0.0, NormDelta = 0.0;
for (int n = 0; n < N; n++) {
Norm1 += norm(d1[n]);
Norm2 += norm(d2[n]);
NormDelta += norm(d1[n] - d2[n]);
};
Norm1 = sqrt(Norm1);
Norm2 = sqrt(Norm2);
NormDelta = sqrt(NormDelta);
double RelErr = NormDelta / (0.5 * (Norm1 + Norm2));
if (RelErr > RELTOL) meep::abort("fail: rel error in %s data = %e\n", Name, RelErr);
return RelErr;
}
/***************************************************************/
/* dummy material function needed to pass to structure( ) */
/* constructor as a placeholder before we can call */
/* set_materials_from_geometry */
/***************************************************************/
double dummy_eps(const vec &) { return 1.0; }
/***************************************************************/
/***************************************************************/
/***************************************************************/
void usage(char *progname) {
master_printf("usage: %s [options]\n", progname);
master_printf("options: \n");
master_printf(" --use-symmetry use geometric symmetries\n");
master_printf(" --write-files write reference data files\n");
}
/***************************************************************/
/***************************************************************/
/***************************************************************/
int main(int argc, char *argv[]) {
initialize mpi(argc, argv);
/***************************************************************/
/* parse command-line options **********************************/
/***************************************************************/
bool use_symmetry = false;
bool write_files = false;
for (int narg = 1; narg < argc; narg++) {
if (argv[narg] == 0) continue;
if (!strcasecmp(argv[narg], "--use-symmetry")) {
use_symmetry = true;
master_printf("Using symmetry.\n");
}
else if (!strcasecmp(argv[narg], "--write-files")) {
write_files = true;
master_printf("writing HDF5 data files");
}
else {
master_printf("unknown command-line option %s", argv[narg]);
usage(argv[0]);
exit(1);
};
};
/***************************************************************/
/* initialize geometry, similar to holey_wvg_cavity **********/
/***************************************************************/
double eps = 13.0; // dielectric constant of waveguide
double w = 1.2; // width of waveguide
double r = 0.36; // radius of holes
double d = 1.4; // defect spacing (ordinary spacing = 1)
int N = 3; // number of holes on either side of defect
double sy = 6.0; // size of cell in y direction (perpendicular to wvg.)
double pad = 2.0; // padding between last hole and PML edge
double dpml = 1.0; // PML thickness
double sx = 2.0 * (pad + dpml + N) + d - 1.0; // size of cell in x dir
double resolution = 20.0;
geometry_lattice.size.x = sx;
geometry_lattice.size.y = sy;
geometry_lattice.size.z = 0.0;
grid_volume gv = voltwo(sx, sy, resolution);
gv.center_origin();
symmetry sym = use_symmetry ? -mirror(Y, gv) : identity();
structure the_structure(gv, dummy_eps, pml(dpml), sym);
meep_geom::material_type vacuum = meep_geom::vacuum;
auto material_deleter = [](meep_geom::material_data *m) {
meep_geom::material_free(m);
delete m;
};
std::unique_ptr<meep_geom::material_data, decltype(material_deleter)> dielectric(
meep_geom::make_dielectric(eps), material_deleter);
geometric_object objects[7];
vector3 origin = v3(0.0, 0.0, 0.0);
vector3 xhat = v3(1.0, 0.0, 0.0);
vector3 yhat = v3(0.0, 1.0, 0.0);
vector3 zhat = v3(0.0, 0.0, 1.0);
vector3 size = v3(meep_geom::ENORMOUS, w, meep_geom::ENORMOUS);
double x0 = 0.5 * d;
double deltax = 1.0;
double height = meep_geom::ENORMOUS;
objects[0] = make_block(dielectric.get(), origin, xhat, yhat, zhat, size);
int no = 1;
for (int n = 0; n < N; n++) {
vector3 center = v3(x0 + n * deltax, 0.0, 0.0);
objects[no++] = make_cylinder(vacuum, center, r, height, zhat);
};
for (int n = 0; n < N; n++) {
vector3 center = v3(-x0 - n * deltax, 0.0, 0.0);
objects[no++] = make_cylinder(vacuum, center, r, height, zhat);
};
geometric_object_list g = {no, objects};
meep_geom::set_materials_from_geometry(&the_structure, g);
fields f(&the_structure);
/***************************************************************/
/* add source and timestep until source has finished (no later)*/
/***************************************************************/
double fcen = 0.25; // pulse center frequency
double df = 0.2; // pulse width (in frequency)
gaussian_src_time src(fcen, df);
component src_cmpt = Hz;
f.add_point_source(src_cmpt, src, vec(0.0, 0.0));
while (f.round_time() < f.last_source_time())
f.step();
/***************************************************************/
/***************************************************************/
/***************************************************************/
double xMin = -0.25 * sx, xMax = +0.25 * sx;
double yMin = -0.15 * sy, yMax = +0.15 * sy;
volume v1d(vec(xMin, 0.0), vec(xMax, 0.0));
volume v2d(vec(xMin, yMin), vec(xMax, yMax));
int rank;
size_t dims1D[1], dims2D[2];
direction dirs1D[1], dirs2D[2];
#define H5FILENAME DATADIR "array-slice-ll-ref"
#define NX 126
#define NY 38
if (write_files) {
h5file *file = f.open_h5file(H5FILENAME);
f.output_hdf5(Hz, v1d, file);
f.output_hdf5(Sy, v2d, file);
master_printf("Wrote binary data to file %s.h5\n", H5FILENAME);
delete file;
exit(0);
}
else {
//
// read 1D and 2D array-slice data from HDF5 file
//
h5file *file = f.open_h5file(H5FILENAME, h5file::READONLY);
std::unique_ptr<realnum []> rdata(static_cast<realnum *>(
file->read("hz.r", &rank, dims1D, 1, sizeof(realnum) == sizeof(float))));
if (rank != 1 || dims1D[0] != NX)
meep::abort("failed to read 1D data(hz.r) from file %s.h5", H5FILENAME);
std::unique_ptr<realnum []> idata(static_cast<realnum *>(
file->read("hz.i", &rank, dims1D, 1, sizeof(realnum) == sizeof(float))));
if (rank != 1 || dims1D[0] != NX)
meep::abort("failed to read 1D data(hz.i) from file %s.h5", H5FILENAME);
std::vector<std::complex<realnum>> file_slice1d;
for (size_t n = 0; n < dims1D[0]; n++)
file_slice1d.emplace_back(rdata[n], idata[n]);
std::unique_ptr<realnum[]> file_slice2d(static_cast<realnum *>(
file->read("sy", &rank, dims2D, 2, sizeof(realnum) == sizeof(float))));
if (rank != 2 || dims2D[0] != NX || dims2D[1] != NY)
meep::abort("failed to read 2D reference data from file %s.h5", H5FILENAME);
delete file;
//
// generate 1D and 2D array slices and compare to
// data read from file
//
rank = f.get_array_slice_dimensions(v1d, dims1D, dirs1D, true, false);
if (rank != 1 || dims1D[0] != NX) meep::abort("incorrect dimensions for 1D slice");
std::unique_ptr<std::complex<double> []> slice1d(f.get_complex_array_slice(v1d, Hz, 0, 0, true));
std::vector<std::complex<realnum>> slice1d_realnum;
for (int i = 0; i < NX; ++i)
slice1d_realnum.emplace_back(slice1d[i]);
double RelErr1D = Compare(slice1d_realnum.data(), file_slice1d.data(), NX, "Hz_1d");
master_printf("1D: rel error %e\n", RelErr1D);
rank = f.get_array_slice_dimensions(v2d, dims2D, dirs2D, true, false);
if (rank != 2 || dims2D[0] != NX || dims2D[1] != NY) meep::abort("incorrect dimensions for 2D slice");
std::unique_ptr<double []> slice2d(f.get_array_slice(v2d, Sy, 0, 0, true));
std::unique_ptr<realnum[]> slice2d_realnum(new realnum[NX * NY]);
for (int i = 0; i < NX * NY; ++i)
slice2d_realnum[i] = static_cast<realnum>(slice2d[i]);
double RelErr2D = Compare(slice2d_realnum.get(), file_slice2d.get(), NX * NY, "Sy_2d");
master_printf("2D: rel error %e\n", RelErr2D);
}; // if (write_files) ... else ...
return 0;
}