diff options
Diffstat (limited to 'examples/src/models/On/wolff_On.cpp')
-rw-r--r-- | examples/src/models/On/wolff_On.cpp | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/examples/src/models/On/wolff_On.cpp b/examples/src/models/On/wolff_On.cpp new file mode 100644 index 0000000..e3568c7 --- /dev/null +++ b/examples/src/models/On/wolff_On.cpp @@ -0,0 +1,268 @@ + +#include <getopt.h> +#include <stdio.h> + +#ifdef HAVE_GLUT +#include <GL/glut.h> +#endif + +#include "orthogonal.hpp" +#include "vector.hpp" + +#include <wolff.hpp> +#include <measure.hpp> +#include <colors.h> +#include <randutils/randutils.hpp> + +typedef orthogonal_t <N_COMP, double> orthogonal_R_t; +typedef vector_t <N_COMP, double> vector_R_t; +typedef state_t <orthogonal_R_t, vector_R_t> On_t; + +// angle from the x-axis of a two-vector +double theta(vector_R_t v) { + double x = v[0]; + double y = v[1]; + + double val = atan(y / x); + + if (x < 0.0 && y > 0.0) { + return M_PI + val; + } else if ( x < 0.0 && y < 0.0 ) { + return - M_PI + val; + } else { + return val; + } +} + +double H_modulated(vector_R_t v, int order, double mag) { + return mag * cos(order * theta(v)); +} + +int main(int argc, char *argv[]) { + + count_t N = (count_t)1e7; + +#ifdef DIMENSION + D_t D = DIMENSION; +#else + D_t D = 2; +#endif + L_t L = 128; + double T = 2.26918531421; + double *H_vec = (double *)calloc(MAX_Q, sizeof(double)); + + bool silent = false; + bool use_pert = false; + bool N_is_sweeps = false; + bool draw = false; + unsigned int window_size = 512; + + bool modulated_field = false; + unsigned int order = 1; + + int opt; + q_t H_ind = 0; + double epsilon = 1; + +// unsigned char measurement_flags = measurement_energy | measurement_clusterSize; + + unsigned char measurement_flags = 0; + + while ((opt = getopt(argc, argv, "N:D:L:T:H:spe:mo:M:Sdw:")) != -1) { + switch (opt) { + case 'N': // number of steps + N = (count_t)atof(optarg); + break; +#ifdef DIMENSION + case 'D': // dimension + printf("Dimension was specified at compile time, you can't change it now!\n"); + exit(EXIT_FAILURE); +#else + case 'D': // dimension + D = atoi(optarg); + break; +#endif + 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_vec[H_ind] = atof(optarg); + H_ind++; + break; + case 's': // don't print anything during simulation. speeds up slightly + silent = true; + break; + case 'p': + use_pert = true; + break; + case 'e': + epsilon = atof(optarg); + break; + case 'm': + modulated_field = true; + break; + case 'M': + measurement_flags ^= 1 << atoi(optarg); + break; + case 'o': + order = atoi(optarg); + break; + case 'S': + N_is_sweeps = 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); + } + } + + unsigned long timestamp; + + { + struct timespec spec; + clock_gettime(CLOCK_REALTIME, &spec); + timestamp = spec.tv_sec*1000000000LL + spec.tv_nsec; + } + + const char *pert_type; + + std::function <orthogonal_R_t(std::mt19937&, vector_R_t)> gen_R; + + if (use_pert) { + double Hish; + if (modulated_field) { + Hish = fabs(H_vec[0]); + } else { + double H2 = 0; + for (q_t i = 0; i < N_COMP; i++) { + H2 += pow(H_vec[i], 2); + } + Hish = sqrt(H2); + } + + epsilon = sqrt((N_COMP - 1) * T / (D + Hish / 2)) / 2; + + gen_R = std::bind(generate_rotation_perturbation <N_COMP>, std::placeholders::_1, std::placeholders::_2, epsilon, order); + pert_type = "PERTURB5"; + } else { + gen_R = generate_rotation_uniform <N_COMP>; + pert_type = "UNIFORM"; + } + + FILE *outfile_info = fopen("wolff_metadata.txt", "a"); + + fprintf(outfile_info, "<| \"ID\" -> %lu, \"MODEL\" -> \"%s\", \"q\" -> %d, \"D\" -> %" PRID ", \"L\" -> %" PRIL ", \"NV\" -> %" PRIv ", \"NE\" -> %" PRIv ", \"T\" -> %.15f, \"FIELD_TYPE\" -> ", timestamp, ON_strings[N_COMP], N_COMP, D, L, (v_t)pow(L, D), D * (v_t)pow(L, D), T); + if (modulated_field) { + fprintf(outfile_info, "\"MODULATED\", \"ORDER\" -> %d, \"H\" -> %.15f, ", order, H_vec[0]); + } else { + fprintf(outfile_info, "\"VECTOR\", \"H\" -> {"); + for (q_t i = 0; i < N_COMP; i++) { + fprintf(outfile_info, "%.15f", H_vec[i]); + if (i < N_COMP - 1) { + fprintf(outfile_info, ", "); + } + } + fprintf(outfile_info, "}, "); + } + + fprintf(outfile_info, "\"GENERATOR\" -> \"%s\"", pert_type); + + if (use_pert) { + fprintf(outfile_info, ", \"EPS\" -> %g", epsilon); + } + + fprintf(outfile_info, " |>\n"); + + fclose(outfile_info); + + FILE **outfiles = measure_setup_files(measurement_flags, timestamp); + + std::function <void(const On_t&)> other_f; + uint64_t sum_of_clusterSize = 0; + + if (N_is_sweeps) { + other_f = [&] (const On_t& s) { + sum_of_clusterSize += s.last_cluster_size; + }; + } else if (draw) { +#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); + + other_f = [&] (const On_t& s) { + glClear(GL_COLOR_BUFFER_BIT); + for (v_t i = 0; i < pow(L, 2); i++) { + vector_R_t v_tmp = s.R.act_inverse(s.spins[i]); + double thetai = fmod(2 * M_PI + theta(v_tmp), 2 * M_PI); + double saturation = 0.7; + double value = 0.9; + double chroma = saturation * value; + glColor3f(chroma * hue_to_R(thetai) + (value - chroma), chroma * hue_to_G(thetai) + (value - chroma), chroma * hue_to_B(thetai) + (value - chroma)); + glRecti(i / L, i % L, (i / L) + 1, (i % L) + 1); + } + glFlush(); + }; +#endif + } else { + other_f = [] (const On_t& s) {}; + } + + std::function <void(const On_t&)> measurements = measure_function_write_files(measurement_flags, outfiles, other_f); + + std::function <double(const vector_R_t&)> H; + + if (modulated_field) { + H = std::bind(H_modulated, std::placeholders::_1, order, H_vec[0]); + } else { + H = std::bind(H_vector <N_COMP, double>, std::placeholders::_1, H_vec); + } + + // initialize random number generator + randutils::auto_seed_128 seeds; + std::mt19937 rng{seeds}; + +#ifndef NOFIELD + state_t <orthogonal_R_t, vector_R_t> s(D, L, T, dot <N_COMP, double>, H); +#else + state_t <orthogonal_R_t, vector_R_t> s(D, L, T, dot <N_COMP, double>); +#endif + + if (N_is_sweeps) { + count_t N_rounds = 0; + printf("\n"); + while (sum_of_clusterSize < N * s.nv) { + printf("\033[F\033[J\033[F\033[JWOLFF: sweep %" PRIu64 " / %" PRIu64 ": E = %.2f, S = %" PRIv "\n", (count_t)((double)sum_of_clusterSize / (double)s.nv), N, s.E, s.last_cluster_size); + wolff <orthogonal_R_t, vector_R_t> (N, s, gen_R, measurements, rng, silent); + N_rounds++; + } + printf("\033[F\033[J\033[F\033[JWOLFF: sweep %" PRIu64 " / %" PRIu64 ": E = %.2f, S = %" PRIv "\n\n", (count_t)((double)sum_of_clusterSize / (double)s.nv), N, s.E, s.last_cluster_size); + } else { + wolff <orthogonal_R_t, vector_R_t> (N, s, gen_R, measurements, rng, silent); + } + + measure_free_files(measurement_flags, outfiles); + free(H_vec); + + return 0; +} + |