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-rw-r--r--src/wolff_On.cpp2
-rw-r--r--src/wolff_dgm.cpp168
-rw-r--r--src/wolff_ising.cpp2
-rw-r--r--src/wolff_potts.cpp20
4 files changed, 180 insertions, 12 deletions
diff --git a/src/wolff_On.cpp b/src/wolff_On.cpp
index a59876f..9f95f4a 100644
--- a/src/wolff_On.cpp
+++ b/src/wolff_On.cpp
@@ -125,7 +125,7 @@ int main(int argc, char *argv[]) {
const char *pert_type;
- std::function <orthogonal_R_t(gsl_rng *, const On_t *)> gen_R;
+ std::function <orthogonal_R_t(gsl_rng *, vector_R_t)> gen_R;
if (use_pert) {
gen_R = std::bind(generate_rotation_perturbation <N_COMP>, std::placeholders::_1, std::placeholders::_2, epsilon);
diff --git a/src/wolff_dgm.cpp b/src/wolff_dgm.cpp
new file mode 100644
index 0000000..6337a5e
--- /dev/null
+++ b/src/wolff_dgm.cpp
@@ -0,0 +1,168 @@
+
+#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 <wolff.h>
+
+typedef state_t <dihedral_inf_t<int64_t>, height_t<int64_t>> 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;
+ uint64_t 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(height_t<int64_t>, height_t<int64_t>)> Z = [] (height_t<int64_t> h1, height_t<int64_t> h2) -> double {
+ return -pow(h1.x - h2.x, 2);
+ };
+
+ // define spin-field coupling
+ std::function <double(height_t<int64_t>)> B = [=] (height_t<int64_t> 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<int64_t>(gsl_rng *, height_t<int64_t>)> gen_R = [=] (gsl_rng *r, height_t<int64_t> h) -> dihedral_inf_t<int64_t> {
+ dihedral_inf_t<int64_t> rot;
+ rot.is_reflection = true;
+
+ int direction = gsl_rng_uniform_int(r, 2);
+ int64_t amount = gsl_rng_uniform_int(r, epsilon);
+
+ if (direction == 0) {
+ rot.x = 2 * h.x + (1 + amount);
+ } else {
+ rot.x = 2 * h.x - (1 + 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
+
+ // 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);
+ int64_t max_h = INT64_MIN;
+ int64_t min_h = INT64_MAX;
+ for (v_t i = 0; i < pow(L, 2); i++) {
+ int64_t cur_h = act_inverse(s->R, 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++) {
+ int64_t cur_h = act_inverse(s->R, 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();
+ };
+ }
+
+ // 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;
+
+}
+
diff --git a/src/wolff_ising.cpp b/src/wolff_ising.cpp
index 83b6448..e072d6a 100644
--- a/src/wolff_ising.cpp
+++ b/src/wolff_ising.cpp
@@ -88,7 +88,7 @@ int main(int argc, char *argv[]) {
state_t <z2_t, ising_t> s(D, L, T, Z, B);
// define function that generates self-inverse rotations
- std::function <z2_t(gsl_rng *, const state_t <z2_t, ising_t> *)> gen_R = [] (gsl_rng *, const state_t <z2_t, ising_t> *) -> z2_t {
+ std::function <z2_t(gsl_rng *, ising_t)> gen_R = [] (gsl_rng *, ising_t s) -> z2_t {
z2_t rot;
rot.x = true;
return rot;
diff --git a/src/wolff_potts.cpp b/src/wolff_potts.cpp
index 3b55472..74e0ea9 100644
--- a/src/wolff_potts.cpp
+++ b/src/wolff_potts.cpp
@@ -90,21 +90,21 @@ int main(int argc, char *argv[]) {
state_t <symmetric_t<POTTSQ>, potts_t<POTTSQ>> s(D, L, T, Z, B);
// define function that generates self-inverse rotations
- std::function <symmetric_t<POTTSQ>(gsl_rng *, const sim_t *)> gen_R = [] (gsl_rng *r, const sim_t *s) -> symmetric_t<POTTSQ> {
+ std::function <symmetric_t<POTTSQ>(gsl_rng *, potts_t<POTTSQ>)> gen_R = [] (gsl_rng *r, potts_t<POTTSQ> v) -> symmetric_t<POTTSQ> {
symmetric_t<POTTSQ> rot;
init(&rot);
- for (int i = POTTSQ - 1; i >= 0; i--) {
- if (rot.perm[i] == i) {
- q_t j = gsl_rng_uniform_int(r, i + 1);
- if (rot.perm[j] == j) {
- q_t tmp = rot.perm[i];
- rot.perm[i] = rot.perm[j];
- rot.perm[j] = tmp;
- }
- }
+ q_t j = gsl_rng_uniform_int(r, POTTSQ - 1);
+ q_t swap_v;
+ if (j < v.x) {
+ swap_v = j;
+ } else {
+ swap_v = j + 1;
}
+ rot.perm[v.x] = swap_v;
+ rot.perm[swap_v] = v.x;
+
return rot;
};