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/* domain_init.cpp
*
* Copyright (C) 2013 Jaron Kent-Dobias
*
* 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
*/
// Initializes a circular domain, or a circular domain with a perturbation.
#include <unistd.h>
#include <iostream>
#include <string>
#include <stdlib.h>
#include <math.h>
// GSL includes.
#include <gsl/gsl_sf.h>
#include <gsl/gsl_math.h>
#include <gsl/gsl_vector.h>
#include "domain_minimize.h"
#include "domain_energy.h"
int main(int argc, char *argv[]) {
// Declaring variables.
gsl_vector *z, *new_z;
int opt;
unsigned n;
double c;
char out_file[20];
// Default values.
sprintf(out_file, "%s", "out.dat");
// GNU getopt in action.
while ((opt = getopt(argc, argv, "n:c:i:")) != -1) {
switch (opt) {
case 'n':
n = atoi(optarg);
break;
case 'c':
c = atof(optarg);
break;
case 'i':
sprintf(out_file, "%s", optarg);
break;
default:
exit(EXIT_FAILURE);
}
}
z = gsl_vector_alloc(3 * n + 3);
new_z = gsl_vector_alloc(6 * n + 3);
FILE *f = fopen(out_file, "r");
gsl_vector_fscanf(f, z);
fclose(f);
gsl_vector_set(new_z, 2 * n - 1, (gsl_vector_get(z, 0) + gsl_vector_get(z, n - 1)) / 2);
gsl_vector_set(new_z, 2 * n - 2, gsl_vector_get(z, n - 2));
for (unsigned i = 0; i < n - 1; i ++) {
gsl_vector_set(new_z, 2 * i, gsl_vector_get(z, i));
gsl_vector_set(new_z, 2 * i + 1,
(gsl_vector_get(z, i) + gsl_vector_get(z, i + 1)) / 2);
}
gsl_vector_set(new_z, 2 * n, gsl_vector_get(z, n) / 2);
gsl_vector_set(new_z, 2 * n + 1, gsl_vector_get(z, n));
gsl_vector_set(new_z, 4 * n - 2, gsl_vector_get(z, 2 * n - 2) / 2);
gsl_vector_set(new_z, 4 * n - 3, gsl_vector_get(z, 2 * n - 2));
for (unsigned i = 1; i < n - 1; i ++) {
gsl_vector_set(new_z, 2 * (n + i) + 1, gsl_vector_get(z, n + i));
gsl_vector_set(new_z, 2 * (n + i) ,
(gsl_vector_get(z, n + i - 1) + gsl_vector_get(z, n + i)) / 2);
}
gsl_vector_set(new_z, 4 * n - 1, gsl_vector_get(z, 2 * n -1));
gsl_vector_set(new_z, 4 * n, gsl_vector_get(z, 2 * n));
for (unsigned i = 0; i < n; i++) {
gsl_vector_set(new_z, 4 * n + 1 + 2 * i, gsl_vector_get(z, 2 * n + 1 + i));
gsl_vector_set(new_z, 4 * n + 2 + 2 * i, gsl_vector_get(z, 2 * n + 1 + i));
}
gsl_vector_set(new_z, 6 * n + 1, gsl_vector_get(z, 3 * n + 1));
gsl_vector_set(new_z, 6 * n + 2, gsl_vector_get(z, 3 * n + 2));
int result;
result = domain_minimize_fixed(new_z, 2 * n, c, 1e-8, 0.00001, 5000, 4, 2);
if (result) printf("Converging failed.");
else {
FILE *fout = fopen(out_file, "w");
gsl_vector_fprintf(fout, new_z, "%.10g");
fclose(fout);
}
gsl_vector_free(z);
gsl_vector_free(new_z);
}
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