/
array-metadata.cpp
323 lines (292 loc) · 12.2 KB
/
array-metadata.cpp
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/***************************************************************/
/***************************************************************/
/***************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <complex>
#include <vector>
#include "meep.hpp"
#include "ctl-math.h"
#include "ctlgeom.h"
#include "meepgeom.hpp"
using namespace meep;
using std::vector;
vector3 v3(double x = 0.0, double y = 0.0, double z = 0.0) {
vector3 v;
v.x = x;
v.y = y;
v.z = z;
return v;
}
/***************************************************************/
/***************************************************************/
/***************************************************************/
static ivec vec2diel_floor(const vec &pt, double a, const ivec &equal_shift) {
ivec ipt(pt.dim);
LOOP_OVER_DIRECTIONS(pt.dim, d) {
ipt.set_direction(d, 1 + 2 * int(floor(pt.in_direction(d) * a - .5)));
if (ipt.in_direction(d) == pt.in_direction(d))
ipt.set_direction(d, ipt.in_direction(d) + equal_shift.in_direction(d));
}
return ipt;
}
static ivec vec2diel_ceil(const vec &pt, double a, const ivec &equal_shift) {
ivec ipt(pt.dim);
LOOP_OVER_DIRECTIONS(pt.dim, d) {
ipt.set_direction(d, 1 + 2 * int(ceil(pt.in_direction(d) * a - .5)));
if (ipt.in_direction(d) == pt.in_direction(d))
ipt.set_direction(d, ipt.in_direction(d) + equal_shift.in_direction(d));
}
return ipt;
}
namespace meep {
void compute_boundary_weights(grid_volume gv, const volume &wherec, ivec &is, ivec &ie,
bool snap_empty_dims, vec &s0, vec &e0, vec &s1, vec &e1);
}
/***************************************************************/
/***************************************************************/
/***************************************************************/
bool equal_float(double *array1, double *array2, int N) {
for (int n = 0; n < N; n++)
if (((float)array1[n]) != ((float)array2[n])) return false;
return true;
}
/***************************************************************/
/* check that the coordinates and weights computed from the */
/* metadata match the correct values for all grid points in */
/* where. return true for zero mismatches, false otherwise. */
/* */
/* if the environment variable MEEP_ARRAY_METADATA_LOGFILE is */
/* set, more detailed output is written to that file. */
/***************************************************************/
bool test_array_metadata(meep::fields &f, const volume &where) {
/***************************************************************/
/* step 1: get coordinate grids and weights as reported by */
/* get_array_metadata */
/***************************************************************/
size_t dims[3];
direction dirs[3];
int rank = f.get_array_slice_dimensions(where, dims, dirs);
std::vector<double> xyzw = f.get_array_metadata(where);
// convert to a more convenient format
int offset = 0;
size_t nxyz[3], nw = 1;
vector<double> tics[3], weights;
for (int i = 0; i < 3; ++i) {
nxyz[i] = (size_t)xyzw[offset++];
nw *= nxyz[i];
for (size_t j = 0; j < nxyz[i]; ++j)
tics[i].push_back(xyzw[offset++]);
}
for (size_t j = 0; j < nw; ++j)
weights.push_back(xyzw[offset++]);
size_t stride[3];
stride[2] = 1;
stride[1] = nxyz[2];
stride[0] = nxyz[1] * nxyz[2];
printf("Metadata: Rank=%i, dims=", rank);
for (int r = 0; r < rank; r++)
printf("%c %zu", r == 0 ? '{' : ',', dims[r]);
printf("}, ");
printf("xyz sizes={%zu, %zu, %zu}, ", nxyz[0], nxyz[1], nxyz[2]);
printf("strides={%zu, %zu, %zu}\n", stride[0], stride[1], stride[2]);
/***************************************************************/
/* step 2: initialize loop over grid points in the volume via */
/* standard libmeep looping primitives */
/***************************************************************/
component cgrid = Centered;
grid_volume gv = f.gv;
vec yee_c(gv.yee_shift(Centered) - gv.yee_shift(cgrid));
ivec iyee_c(gv.iyee_shift(Centered) - gv.iyee_shift(cgrid));
volume wherec(where + yee_c);
ivec is(vec2diel_floor(wherec.get_min_corner(), gv.a, zero_ivec(gv.dim)));
ivec ie(vec2diel_ceil(wherec.get_max_corner(), gv.a, zero_ivec(gv.dim)));
ivec imin = gv.little_corner() + one_ivec(gv.dim), imax = gv.big_corner() - one_ivec(gv.dim);
LOOP_OVER_DIRECTIONS(gv.dim, d) {
if (is.in_direction(d) < imin.in_direction(d)) is.set_direction(d, imin.in_direction(d));
if (ie.in_direction(d) > imax.in_direction(d)) ie.set_direction(d, imax.in_direction(d));
}
bool snap_empty_dims = true;
vec s0(gv.dim), e0(gv.dim), s1(gv.dim), e1(gv.dim);
// this initialization step seems to be necessary here to avoid winding
// up with zero or undefined integration weights; I don't know why it
// seems to be unnecessary for loop_in_chunks above.
FOR_DIRECTIONS(d)
if (!has_direction(gv.dim, d)) {
s0.set_direction(d, 1.0);
e0.set_direction(d, 1.0);
s1.set_direction(d, 1.0);
e1.set_direction(d, 1.0);
}
compute_boundary_weights(gv, wherec, is, ie, snap_empty_dims, s0, e0, s1, e1);
// Determine integration "volumes" dV0 and dV1
double dV0 = 1.0, dV1 = 0.0;
LOOP_OVER_DIRECTIONS(gv.dim, d)
if (wherec.in_direction(d) > 0.0) dV0 *= gv.inva;
/***************************************************************/
/* step 3: execute the loop and check that coordinates and */
/* weights of each point as determined from the return */
/* values of get_array_metadata agree with those */
/* determined by the libmeep loop primitives */
/***************************************************************/
int num_points = 0, num_mismatches = 0;
char *LogFileName = getenv("MEEP_ARRAY_METADATA_LOGFILE");
FILE *LogFile = (LogFileName ? fopen(LogFileName, "w") : 0);
LOOP_OVER_IVECS(gv, is, ie, idx) {
// get the (correct) coordinates and weight for the current grid point,
// or (for collapsed dimensions) the sum of the weights of the two
// points from which we interpolate to get values at the array slice coordinate
double xyzw_loop[4] = {0.0, 0.0, 0.0, 0.0};
IVEC_LOOP_LOC(gv, loc);
xyzw_loop[0] = has_direction(gv.dim, X) ? loc.x() : 0.0;
xyzw_loop[1] = has_direction(gv.dim, Y) ? loc.y() : 0.0;
xyzw_loop[2] = has_direction(gv.dim, Z) ? loc.z() : 0.0;
xyzw_loop[3] = IVEC_LOOP_WEIGHT(s0, s1, e0, e1, dV0 + dV1 * loop_i2);
// coordinates and weight for current grid point according to metadata
double xyzw_meta[4] = {0.0, 0.0, 0.0, 0.0};
IVEC_LOOP_ILOC(gv, iloc);
ivec two_n = iloc - is;
int nx = 0, ny = 0, nz = 0, index = 0;
if (has_direction(gv.dim, X)) {
nx = two_n.in_direction(X) / 2;
xyzw_meta[0] = tics[0][nx];
index += nx * stride[0];
}
if (has_direction(gv.dim, Y)) {
ny = two_n.in_direction(Y) / 2;
xyzw_meta[1] = tics[1][ny];
index += ny * stride[1];
}
if (has_direction(gv.dim, Z)) {
nz = two_n.in_direction(Z) / 2;
xyzw_meta[2] = tics[2][nz];
index += nz * stride[2];
}
xyzw_meta[3] = weights[index];
bool mismatch = !equal_float(xyzw_loop, xyzw_meta, 4);
if (mismatch) num_mismatches++;
if (LogFile) {
fprintf(LogFile, "%i %i ", num_points++, mismatch ? 0 : 1);
fprintf(LogFile, "%e %e %e %e ", xyzw_loop[0], xyzw_loop[1], xyzw_loop[2], xyzw_loop[3]);
fprintf(LogFile, "%e %e %e %e ", xyzw_meta[0], xyzw_meta[1], xyzw_meta[2], xyzw_meta[3]);
fprintf(LogFile, "\n");
}
} // LOOP_OVER_IVECS(gv, is, ie, idx)
if (LogFile) fclose(LogFile);
printf("%i/%i mismatches\n", num_mismatches, num_points);
return (num_mismatches == 0);
}
/***************************************************************/
/* 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; }
/***************************************************************/
/***************************************************************/
/***************************************************************/
int main(int argc, char *argv[]) {
initialize mpi(argc, argv);
/*--------------------------------------------------------------*/
/*- set default geometric parameters ---------------------------*/
/*--------------------------------------------------------------*/
// size of computational cell
double sx = 10.0;
double sy = 5.0;
double sz = 0.0;
// corners of array volume
double vxmin = -2.5, vxmax = -2.5;
double vymin = -1.0, vymax = +3.0;
double vzmin = 0.0, vzmax = 0.0;
double res = 10.0;
// double-valued command-line parameters
vector<const char *> parm_name;
vector<double *> parm_adrs;
parm_name.push_back("--sx");
parm_adrs.push_back(&sx);
parm_name.push_back("--sy");
parm_adrs.push_back(&sy);
parm_name.push_back("--sz");
parm_adrs.push_back(&sz);
parm_name.push_back("--vxmin");
parm_adrs.push_back(&vxmin);
parm_name.push_back("--vymin");
parm_adrs.push_back(&vymin);
parm_name.push_back("--vzmin");
parm_adrs.push_back(&vzmin);
parm_name.push_back("--vxmax");
parm_adrs.push_back(&vxmax);
parm_name.push_back("--vymax");
parm_adrs.push_back(&vymax);
parm_name.push_back("--vzmax");
parm_adrs.push_back(&vzmax);
parm_name.push_back("--res");
parm_adrs.push_back(&res);
/*--------------------------------------------------------------*/
/*- parse arguments --------------------------------------------*/
/*--------------------------------------------------------------*/
for (int narg = 1; narg < argc; narg++) {
// process double-valued parameters
size_t np;
for (np = 0; np < parm_name.size(); np++)
if (!strcasecmp(argv[narg], parm_name[np])) break;
if (np == parm_name.size()) meep::abort("unknown command-line option %s", argv[narg]);
if (narg + 1 == argc) meep::abort("no option specified for %s", argv[narg]);
if (1 != sscanf(argv[narg + 1], "%le", parm_adrs[np]))
meep::abort("invalid value %s specified for %s", argv[narg + 1], argv[narg]);
printf("Setting %s=%e.\n", argv[narg], *(parm_adrs[np]));
narg++;
}
/*--------------------------------------------------------------*/
/*- initialize geometry ----------------------------------------*/
/*--------------------------------------------------------------*/
geometry_lattice.size.x = sx;
geometry_lattice.size.y = sy;
geometry_lattice.size.z = sz;
grid_volume gv;
if (sx == 0.0 && sy == 0.0)
gv = vol1d(sz, res);
else if (sz == 0.0)
gv = vol2d(sx, sy, res);
else
gv = vol3d(sx, sy, sz, res);
gv.center_origin();
structure the_structure(gv, dummy_eps);
meep_geom::material_type silicon = meep_geom::make_dielectric(12.0);
geometric_object objects[1];
vector3 origin = v3(0.0, 0.0, 0.0);
vector3 wvg_size = v3(0.5 * sx, 0.5 * sy, 0.5 * sz);
vector3 xhat = {1.0, 0.0, 0.0};
vector3 yhat = {0.0, 1.0, 0.0};
vector3 zhat = {0.0, 0.0, 1.0};
objects[0] = make_block(silicon, origin, xhat, yhat, zhat, wvg_size);
geometric_object_list g = {1, objects};
meep_geom::set_materials_from_geometry(&the_structure, g);
/*--------------------------------------------------------------*/
/*--------------------------------------------------------------*/
/*--------------------------------------------------------------*/
fields f(&the_structure);
double fcen = 0.2;
double df = 0.1;
gaussian_src_time src(fcen, df);
component src_cmpt = (gv.dim == D1 ? Ex : Ez);
vec src_point = zero_vec(gv.dim);
vec src_size = zero_vec(gv.dim);
f.add_point_source(src_cmpt, src, src_point);
vec vmin = zero_vec(gv.dim), vmax = zero_vec(gv.dim);
if (has_direction(gv.dim, X)) {
vmin.set_direction(X, vxmin);
vmax.set_direction(X, vxmax);
}
if (has_direction(gv.dim, Y)) {
vmin.set_direction(Y, vymin);
vmax.set_direction(Y, vymax);
}
if (has_direction(gv.dim, Z)) {
vmin.set_direction(Z, vzmin);
vmax.set_direction(Z, vzmax);
}
volume slice(vmin, vmax);
bool test_passed = test_array_metadata(f, slice);
return test_passed ? 0 : 1;
}