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author | Jaron Kent-Dobias <jaron@kent-dobias.com> | 2018-10-10 21:45:32 -0400 |
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committer | Jaron Kent-Dobias <jaron@kent-dobias.com> | 2018-10-10 21:45:32 -0400 |
commit | a43ff1f98e9b9814f858bccb11c174b418458491 (patch) | |
tree | ae7e094d914eddb8a1ae9548420ba8c2f329ffae /src/wolff_cgm.cpp | |
parent | 6e264d243f0b29d90e90b605b6cdeab8227129c9 (diff) | |
download | c++-a43ff1f98e9b9814f858bccb11c174b418458491.tar.gz c++-a43ff1f98e9b9814f858bccb11c174b418458491.tar.bz2 c++-a43ff1f98e9b9814f858bccb11c174b418458491.zip |
big rearrangement of files to make libraries and example (research) files clearer, and changed to c++ std lib random numbers
Diffstat (limited to 'src/wolff_cgm.cpp')
-rw-r--r-- | src/wolff_cgm.cpp | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/src/wolff_cgm.cpp b/src/wolff_cgm.cpp deleted file mode 100644 index ce91bf2..0000000 --- a/src/wolff_cgm.cpp +++ /dev/null @@ -1,166 +0,0 @@ - -#include <getopt.h> - -#ifdef HAVE_GLUT -#include <GL/glut.h> -#endif - -// include your group and spin space -#include <dihedral_inf.h> -#include <height.h> - -// include wolff.h -#include <rand.h> -#include <wolff.h> - -typedef state_t <dihedral_inf_t<double>, height_t<double>> sim_t; - -int main(int argc, char *argv[]) { - - count_t N = (count_t)1e4; - - D_t D = 2; - L_t L = 128; - double T = 2.26918531421; - double H = 0; - - bool silent = false; - bool draw = false; - unsigned int window_size = 512; - double epsilon = 1; - - int opt; - - while ((opt = getopt(argc, argv, "N:D:L:T:H:sdw:e:")) != -1) { - switch (opt) { - case 'N': // number of steps - N = (count_t)atof(optarg); - break; - case 'D': // dimension - D = atoi(optarg); - break; - case 'L': // linear size - L = atoi(optarg); - break; - case 'T': // temperature - T = atof(optarg); - break; - case 'H': // external field. nth call couples to state n - H = atof(optarg); - break; - case 'e': // external field. nth call couples to state n - epsilon = atof(optarg); - break; - case 's': // don't print anything during simulation. speeds up slightly - silent = true; - break; - case 'd': -#ifdef HAVE_GLUT - draw = true; - break; -#else - printf("You didn't compile this with the glut library installed!\n"); - exit(EXIT_FAILURE); -#endif - case 'w': - window_size = atoi(optarg); - break; - default: - exit(EXIT_FAILURE); - } - } - - // initialize random number generator - gsl_rng *r = gsl_rng_alloc(gsl_rng_mt19937); - gsl_rng_set(r, rand_seed()); - - // define spin-spin coupling - std::function <double(const height_t<double>&, const height_t<double>&)> Z = [] (const height_t<double>& h1, const height_t<double>& h2) -> double { - return -pow(h1.x - h2.x, 2); - }; - - // define spin-field coupling - std::function <double(height_t<double>)> B = [=] (height_t<double> h) -> double { - return -H * pow(h.x, 2);; - }; - - // initialize state object - sim_t s(D, L, T, Z, B); - - // define function that generates self-inverse rotations - std::function <dihedral_inf_t<double>(gsl_rng *, height_t<double>)> gen_R = [=] (gsl_rng *r, height_t<double> h) -> dihedral_inf_t<double> { - dihedral_inf_t<double> rot; - rot.is_reflection = true; - - double amount = epsilon * gsl_ran_ugaussian(r); - - rot.x = 2 * h.x + amount; - - return rot; - }; - - // define function that updates any number of measurements - std::function <void(const sim_t&)> measurement; - - double average_M = 0; - if (!draw) { - // a very simple example: measure the average magnetization - measurement = [&] (const sim_t& s) { - average_M += (double)s.M / (double)N / (double)s.nv; - }; - } else { - // a more complex example: measure the average magnetization, and draw the spin configuration to the screen - -#ifdef HAVE_GLUT - // initialize glut - glutInit(&argc, argv); - glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); - glutInitWindowSize(window_size, window_size); - glutCreateWindow("wolff"); - glClearColor(0.0,0.0,0.0,0.0); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - gluOrtho2D(0.0, L, 0.0, L); - - measurement = [&] (const sim_t& s) { - average_M += (double)s.M / (double)N / (double)s.nv; - glClear(GL_COLOR_BUFFER_BIT); - double max_h = INT64_MIN; - double min_h = INT64_MAX; - for (v_t i = 0; i < pow(L, 2); i++) { - double cur_h = (s.R.act_inverse(s.spins[i])).x; - if (cur_h < min_h) { - min_h = cur_h; - } - if (cur_h > max_h) { - max_h = cur_h; - } - } - - for (v_t i = 0; i < pow(L, 2); i++) { - double cur_h = (s.R.act_inverse(s.spins[i])).x; - double mag = ((double)(cur_h - min_h)) / ((double)(max_h - min_h)); - glColor3f(mag, mag, mag); - glRecti(i / L, i % L, (i / L) + 1, (i % L) + 1); - } - glFlush(); - }; -#endif - } - - // run wolff for N cluster flips - wolff(N, s, gen_R, measurement, r, silent); - - // tell us what we found! - printf("%" PRIcount " DGM runs completed. D = %" PRID ", L = %" PRIL ", T = %g, H = %g, <M> = %g\n", N, D, L, T, H, average_M); - - // free the random number generator - gsl_rng_free(r); - - if (draw) { - } - - return 0; - -} - |