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authorJaron Kent-Dobias <jaron@kent-dobias.com>2018-10-10 21:45:32 -0400
committerJaron Kent-Dobias <jaron@kent-dobias.com>2018-10-10 21:45:32 -0400
commita43ff1f98e9b9814f858bccb11c174b418458491 (patch)
treeae7e094d914eddb8a1ae9548420ba8c2f329ffae /src/wolff_cgm.cpp
parent6e264d243f0b29d90e90b605b6cdeab8227129c9 (diff)
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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.cpp166
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;
-
-}
-