simplified and sped up measurementsn substantially, correlation functions and some distributions again incompatible

9 files changed, 316 insertions, 127 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 4d4099f..eecbf72 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -8,6 +8,9 @@ target_link_libraries(measurements frac analysis_tools)
 add_library(animate animate.cpp)
 target_link_libraries(animate frac analysis_tools GL GLU glut)
 
+add_library(sample sample.cpp)
+target_link_libraries(sample frac)
+
 add_executable(fracture fracture.cpp)
 target_link_libraries(fracture frac measurements fftw3 cholmod profiler GL GLU glut)
 
@@ -20,3 +23,9 @@ target_link_libraries(animate_fracture frac animate fftw3 cholmod profiler GL GL
 add_executable(animate_fracture_square animate_fracture_square.cpp)
 target_link_libraries(animate_fracture_square frac animate fftw3 cholmod profiler GL GLU glut)
 
+add_executable(sample_fracture sample_fracture.cpp)
+target_link_libraries(sample_fracture frac sample cholmod)
+
+add_executable(sample_fracture_square sample_fracture_square.cpp)
+target_link_libraries(sample_fracture_square frac sample cholmod)
+
diff --git a/src/fracture.cpp b/src/fracture.cpp
index 595cf1d..ebacd28 100644
--- a/src/fracture.cpp
+++ b/src/fracture.cpp
@@ -61,10 +61,10 @@ int main(int argc, char* argv[]) {
   unsigned Mx = pow(2, ceil(log2(4*Lx)));
   unsigned My = pow(2, ceil(log2(4*Ly)));
 
-  ma meas(Lx, Ly, Mx, My, beta, 4);
+  ma meas(Lx, Ly, Mx, My, beta);
 
-  randutils::auto_seed_128 seeds;
-  std::mt19937 rng{seeds};
+  //randutils::auto_seed_128 seeds;
+  std::mt19937 rng{683129629};
 
   for (unsigned trial = 0; trial < N; trial++) {
     while (true) {
diff --git a/src/fracture_square.cpp b/src/fracture_square.cpp
index 47d7d67..dec4a2c 100644
--- a/src/fracture_square.cpp
+++ b/src/fracture_square.cpp
@@ -57,7 +57,7 @@ int main(int argc, char* argv[]) {
   cholmod_common c;
   CHOL_F(start)(&c);
 
-  ma meas(Lx, Ly, 2*Lx, 2*Ly, beta, 10);
+  ma meas(Lx, Ly, 2*Lx, 2*Ly, beta);
   graph G(Lx, Ly);
   network perm_network(G, &c);
 
diff --git a/src/measurements.cpp b/src/measurements.cpp
index ff217b2..ed4b8eb 100644
--- a/src/measurements.cpp
+++ b/src/measurements.cpp
@@ -37,17 +37,12 @@ void update_field_file(std::string id, const std::vector<T>& data, unsigned N, d
   std::ifstream file(filename);
 
   uint64_t N_old = 0;
-  std::vector<std::vector<uint64_t>> data_old(data.size());
-  for (unsigned j = 0; j < data.size(); j++) {
-    data_old[j].resize(data[j].size(), 0);
-  }
+  std::vector<T> data_old(data.size(), 0);
 
   if (file.is_open()) {
     file >> N_old;
     for (unsigned j = 0; j < data.size(); j++) {
-      for (unsigned i = 0; i < data[j].size(); i++) {
-        file >> data_old[j][i];
-      }
+      file >> data_old[j];
     }
     file.close();
   }
@@ -56,10 +51,7 @@ void update_field_file(std::string id, const std::vector<T>& data, unsigned N, d
 
   file_out <<std::fixed<< N_old + N <<  "\n";
   for (unsigned j = 0; j < data.size(); j++) {
-    for (unsigned i = 0; i < data[j].size(); i++) {
-      file_out << data_old[j][i] + data[j][i] << " ";
-    }
-    file_out << "\n";
+    file_out << data_old[j] + data[j] << " ";
   }
 
   file_out.close();
@@ -94,6 +86,34 @@ void correlation(unsigned Mx, unsigned My, std::vector<std::vector<T>>& data, co
   }
 }
 
+void autocorrelation2(double Lx, double Ly, unsigned Mx, unsigned My, std::vector<uint64_t>& data, const std::list<graph::coordinate>& pos) {
+  for (std::list<graph::coordinate>::const_iterator it1 = pos.begin(); it1 != pos.end(); it1++) {
+    for (std::list<graph::coordinate>::const_iterator it2 = it1; it2 != pos.end(); it2++) {
+      double Δx_tmp = fabs(it1->x - it2->x);
+      double Δx = Δx_tmp < Lx / 2 ? Δx_tmp : Lx - Δx_tmp;
+
+      double Δy_tmp = fabs(it1->y - it2->y);
+      double Δy = Δy_tmp < Ly / 2 ? Δy_tmp : Ly - Δy_tmp;
+
+      data[floor((Mx * Δx) / Lx) + (Mx / 2) * floor((My * Δy) / Ly)]++;
+    }
+  }
+}
+
+void correlation2(double Lx, double Ly, unsigned Mx, unsigned My, std::vector<uint64_t>& data, const std::list<graph::coordinate>& pos1, const std::list<graph::coordinate>& pos2) {
+  for (std::list<graph::coordinate>::const_iterator it1 = pos1.begin(); it1 != pos1.end(); it1++) {
+    for (std::list<graph::coordinate>::const_iterator it2 = pos2.begin(); it2 != pos2.end(); it2++) {
+      double Δx_tmp = fabs(it1->x - it2->x);
+      double Δx = Δx_tmp < Lx / 2 ? Δx_tmp : Lx - Δx_tmp;
+
+      double Δy_tmp = fabs(it1->y - it2->y);
+      double Δy = Δy_tmp < Ly / 2 ? Δy_tmp : Ly - Δy_tmp;
+
+      data[floor((Mx * Δx) / Lx) + (Mx / 2) * floor((My * Δy) / Ly)]++;
+    }
+  }
+}
+
 template <class T>
 void autocorrelation(unsigned Mx, unsigned My, std::vector<std::vector<T>>& out_data, fftw_plan forward_plan, double *fftw_forward_in, fftw_complex *fftw_forward_out, fftw_plan reverse_plan, fftw_complex *fftw_reverse_in, double *fftw_reverse_out) {
   fftw_execute(forward_plan);
@@ -116,39 +136,28 @@ unsigned edge_r_to_ind(graph::coordinate r, double Lx, double Ly, unsigned Mx, u
   return floor((Mx * r.x) / Lx) + Mx * floor((My * r.y) / Ly);
 }
 
-ma::ma(double Lx, double Ly, unsigned Mx, unsigned My, double beta, unsigned Ncum) :
+ma::ma(double Lx, double Ly, unsigned Mx, unsigned My, double beta) :
   Lx(Lx), Ly(Ly), Mx(Mx), My(My), beta(beta), G(2 * (unsigned)ceil(Lx * Ly / 2)),
   sc(3 * (unsigned)ceil(Lx * Ly / 2), 0),
   ss(3 * (unsigned)ceil(Lx * Ly / 2), 0),
   sm(3 * (unsigned)ceil(Lx * Ly / 2), 0),
   sa(3 * (unsigned)ceil(Lx * Ly / 2), 0),
   sl(3 * (unsigned)ceil(Lx * Ly / 2), 0),
-  sd(3 * (unsigned)ceil(Lx * Ly / 2), 0),
   sD(3 * (unsigned)ceil(Lx * Ly / 2), 0),
-  ccc(Ncum),
-  css(Ncum),
-  cmm(Ncum),
-  caa(Ncum),
-  cll(Ncum),
-  cdd(Ncum),
-  cDD(Ncum),
-  csD(Ncum)
+  ccc((Mx / 2) * (My / 2), 0),
+  css((Mx / 2) * (My / 2), 0),
+  cmm((Mx / 2) * (My / 2), 0),
+  caa((Mx / 2) * (My / 2), 0),
+  cll((Mx / 2) * (My / 2), 0),
+  cDD((Mx / 2) * (My / 2), 0),
+  csD((Mx / 2) * (My / 2), 0)
 {
   N = 0;
   Nc = 0;
   Na = 0;
-  for (unsigned i = 0; i < Ncum; i++) {
-    ccc[i].resize((Mx / 2 + 1) * (My / 2 + 1), 0);
-    css[i].resize((Mx / 2 + 1) * (My / 2 + 1), 0);
-    cmm[i].resize((Mx / 2 + 1) * (My / 2 + 1), 0);
-    caa[i].resize((Mx / 2 + 1) * (My / 2 + 1), 0);
-    cll[i].resize((Mx / 2 + 1) * (My / 2 + 1), 0);
-    cdd[i].resize((Mx / 2 + 1) * (My / 2 + 1), 0);
-    cDD[i].resize((Mx / 2 + 1) * (My / 2 + 1), 0);
-    csD[i].resize((Mx / 2 + 1) * (My / 2 + 1), 0);
-  }
 
   // FFTW setup for correlation functions
+  /*
   fftw_set_timelimit(1);
 
   fftw_forward_in = (double *)fftw_malloc(Mx * My * sizeof(double));
@@ -158,12 +167,12 @@ ma::ma(double Lx, double Ly, unsigned Mx, unsigned My, double beta, unsigned Ncu
 
   forward_plan = fftw_plan_dft_r2c_2d(My, Mx, fftw_forward_in, fftw_forward_out, 0);
   reverse_plan = fftw_plan_dft_c2r_2d(My, Mx, fftw_reverse_in, fftw_reverse_out, 0);
-  std::string filename = "fracture_" + std::to_string(Lx) + "_" + std::to_string(Ly) + "_" + std::to_string(beta) + "_current.dat";
-  //stress_file.open(filename, std::ifstream::app);
+  */
 }
 
 ma::~ma() {
   // clean up FFTW objects
+  /*
   fftw_free(fftw_forward_in);
   fftw_free(fftw_forward_out);
   fftw_free(fftw_reverse_in);
@@ -171,13 +180,13 @@ ma::~ma() {
   fftw_destroy_plan(forward_plan);
   fftw_destroy_plan(reverse_plan);
   fftw_cleanup();
+  */
 
   update_distribution_file("sc", sc, Nc, Lx, Ly, beta);
   update_distribution_file("ss", ss, N, Lx, Ly, beta);
   update_distribution_file("sm", sm, N, Lx, Ly, beta);
   update_distribution_file("sa", sa, Na, Lx, Ly, beta);
   update_distribution_file("sl", sl, N, Lx, Ly, beta);
-  update_distribution_file("sd", sd, N, Lx, Ly, beta);
   update_distribution_file("sD", sD, N, Lx, Ly, beta);
 
   update_field_file("ccc", ccc, Nc, Lx, Ly, beta, Mx, My);
@@ -185,7 +194,6 @@ ma::~ma() {
   update_field_file("cmm", cmm, N, Lx, Ly, beta, Mx, My);
   update_field_file("caa", caa, Na, Lx, Ly, beta, Mx, My);
   update_field_file("cll", cll, N, Lx, Ly, beta, Mx, My);
-  update_field_file("cdd", cdd, N, Lx, Ly, beta, Mx, My);
   update_field_file("cDD", cDD, N, Lx, Ly, beta, Mx, My);
   update_field_file("csD", csD, N, Lx, Ly, beta, Mx, My);
 
@@ -204,19 +212,12 @@ void ma::bond_broken(const network& net, const current_info& cur, unsigned i) {
     sa[avalanches.back().size() - 1]++;
     Na++;
 
-    std::fill_n(fftw_forward_in, Mx * My, 0.0);
-
-    for (auto e : avalanches.back()) {
-      unsigned ind = edge_r_to_ind(net.G.edges[e].r, Lx, Ly, Mx, My);
-      fftw_forward_in[ind] += 1.0;
-    }
-
-    autocorrelation(Mx, My, caa, forward_plan, fftw_forward_in, fftw_forward_out, reverse_plan, fftw_reverse_in, fftw_reverse_out);
+    autocorrelation2(Lx, Ly, Mx, My, caa, avalanches.back());
 
     lv = c;
-    avalanches.push_back({i});
+    avalanches.push_back({net.G.edges[i].r});
   } else {
-    avalanches.back().push_back(i);
+    avalanches.back().push_back(net.G.edges[i].r);
   }
 
   boost::add_edge(net.G.dual_edges[i].v[0], net.G.dual_edges[i].v[1], {i}, G);
@@ -228,110 +229,58 @@ void ma::post_fracture(network &n) {
 
   std::list<unsigned> crack = find_minimal_crack(G, n);
 
-  // crack surface correlations
-  std::fill_n(fftw_forward_in, Mx * My, 0.0);
-
-  ss[crack.size()]++;
+  ss[crack.size() - 1]++;
+  std::list<graph::coordinate> sr;
 
   for (auto edge : crack) {
-    fftw_forward_in[edge_r_to_ind(n.G.dual_vertices[n.G.dual_edges[edge].v[0]].r, Lx, Ly, Mx, My)] += 0.5;
-    fftw_forward_in[edge_r_to_ind(n.G.dual_vertices[n.G.dual_edges[edge].v[1]].r, Lx, Ly, Mx, My)] += 0.5;
+    sr.push_back(n.G.dual_edges[edge].r);
   }
 
-  fftw_complex *tss = data_transform(Mx, My, forward_plan, fftw_forward_in, fftw_forward_out);
-
-  correlation(Mx, My, css, tss, tss, reverse_plan, fftw_reverse_in, fftw_reverse_out);
+  autocorrelation2(Lx, Ly, Mx, My, css, sr);
 
   unsigned crack_component = component[n.G.dual_edges[crack.front()].v[0]];
 
-  std::vector<std::list<unsigned>> components(num);
+  std::vector<std::list<graph::coordinate>> components(num);
 
   for (unsigned i = 0; i < n.G.dual_vertices.size(); i++) {
-    components[component[i]].push_back(i);
+    components[component[i]].push_back(n.G.dual_vertices[i].r);
   }
 
-  // non-spanning clusters
-  std::fill_n(fftw_forward_in, Mx * My, 0.0);
-
   for (unsigned i = 0; i < num; i++) {
     if (i != crack_component && components[i].size() > 0) {
       sc[components[i].size() - 1]++;
       Nc++;
 
-      for (auto it = components[i].begin(); it != components[i].end(); it++) {
-        unsigned ind = edge_r_to_ind(n.G.dual_vertices[*it].r, Lx, Ly, Mx, My);
-        fftw_forward_in[ind] += 1.0;
-      }
-
-      autocorrelation(Mx, My, ccc, forward_plan, fftw_forward_in, fftw_forward_out, reverse_plan, fftw_reverse_in, fftw_reverse_out);
-
-      for (auto it = components[i].begin(); it != components[i].end(); it++) {
-        fftw_forward_in[edge_r_to_ind(n.G.dual_vertices[*it].r, Lx, Ly, Mx, My)] = 0.0;
-      }
+      autocorrelation2(Lx, Ly, Mx, My, ccc, components[i]);
     }
   }
 
   // spanning cluster
-  // std::fill_n(fftw_forward_in, Mx * My, 0.0); we already reset in the last loop
 
   sm[components[crack_component].size() - 1]++;
 
-  for (auto it = components[crack_component].begin(); it != components[crack_component].end(); it++) {
-    fftw_forward_in[edge_r_to_ind(n.G.dual_vertices[*it].r, Lx, Ly, Mx, My)] += 1.0;
-  }
-
-  autocorrelation(Mx, My, cmm, forward_plan, fftw_forward_in, fftw_forward_out, reverse_plan, fftw_reverse_in, fftw_reverse_out);
+  autocorrelation2(Lx, Ly, Mx, My, cmm, components[crack_component]);
 
   /// damage at end
-  std::fill_n(fftw_forward_in, Mx * My, 0.0);
-
-  unsigned final_broken = 0;
+  std::list<graph::coordinate> Dr;
 
   for (unsigned i = 0; i < n.G.edges.size(); i++) {
     if (n.fuses[i]) { 
-      final_broken++;
-      fftw_forward_in[edge_r_to_ind(n.G.edges[i].r, Lx, Ly, Mx, My)] += 1.0;
+      Dr.push_back(n.G.edges[i].r);
     }
   }
 
-  sD[final_broken]++;
-
-  fftw_complex *tDD = data_transform(Mx, My, forward_plan, fftw_forward_in, fftw_forward_out);
-
-  correlation(Mx, My, cDD, tDD, tDD, reverse_plan, fftw_reverse_in, fftw_reverse_out);
-  correlation(Mx, My, csD, tss, tDD, reverse_plan, fftw_reverse_in, fftw_reverse_out);
+  sD[Dr.size() - 1]++;
 
-  free(tss);
-  free(tDD);
+  autocorrelation2(Lx, Ly, Mx, My, cDD, Dr);
+  correlation2(Lx, Ly, Mx, My, csD, sr, Dr);
 
-  std::fill_n(fftw_forward_in, Mx * My, 0.0);
+  // ********************** LAST AVALANCHE *********************
 
   // rewind the last avalanche
   sl[avalanches.back().size() - 1]++;
 
-  // rewind the last avalanche
-  for (auto e : avalanches.back()) {
-    boost::remove_edge(n.G.dual_edges[e].v[0], n.G.dual_edges[e].v[1], G);
-    n.break_edge(e, true);
-    fftw_forward_in[edge_r_to_ind(n.G.edges[e].r, Lx, Ly, Mx, My)] += 1.0;
-  }
-
-  autocorrelation(Mx, My, cll, forward_plan, fftw_forward_in, fftw_forward_out, reverse_plan, fftw_reverse_in, fftw_reverse_out);
-
-  // damage size distribution
-  unsigned total_broken = 0;
-
-  std::fill_n(fftw_forward_in, Mx * My, 0.0);
-
-  for (unsigned i = 0; i < n.G.edges.size(); i++) {
-    if (n.fuses[i]) { 
-      fftw_forward_in[edge_r_to_ind(n.G.edges[i].r, Lx, Ly, Mx, My)] += 1.0;
-    }
-  }
-
-  autocorrelation(Mx, My, cdd, forward_plan, fftw_forward_in, fftw_forward_out, reverse_plan, fftw_reverse_in, fftw_reverse_out);
-
-  sd[total_broken]++;
+  autocorrelation2(Lx, Ly, Mx, My, cll, avalanches.back());
 
   N++;
 }
diff --git a/src/measurements.hpp b/src/measurements.hpp
index e267064..0fd4644 100644
--- a/src/measurements.hpp
+++ b/src/measurements.hpp
@@ -19,12 +19,14 @@ class ma : public hooks {
   //  - interface for turning on and off specific measurements
   //
   private:
+    /*
     double *fftw_forward_in;
     fftw_complex *fftw_forward_out;
     fftw_complex *fftw_reverse_in;
     double *fftw_reverse_out;
     fftw_plan forward_plan;
     fftw_plan reverse_plan;
+    */
     unsigned N;
     double Lx;
     double Ly;
@@ -40,16 +42,14 @@ class ma : public hooks {
     std::vector<uint64_t> sm; // spanning cluster size distribution
     std::vector<uint64_t> sa; // non-final avalanche size distribution
     std::vector<uint64_t> sl; // final avalanche size distribution
-    std::vector<uint64_t> sd; // pre-fracture damage distribution
     std::vector<uint64_t> sD; // post-fracture damage distribution
-    std::vector<std::vector<uint64_t>> ccc; // cluster-cluster correlations
-    std::vector<std::vector<uint64_t>> css; // surface-surface correlations
-    std::vector<std::vector<uint64_t>> cmm; // surface-surface correlations
-    std::vector<std::vector<uint64_t>> caa; // avalanche-avalanche correlations
-    std::vector<std::vector<uint64_t>> cll; // damage-damage distribution
-    std::vector<std::vector<uint64_t>> cdd; // damage-damage distribution
-    std::vector<std::vector<uint64_t>> cDD; // damage-damage distribution
-    std::vector<std::vector<uint64_t>> csD; // damage-damage distribution
+    std::vector<uint64_t> ccc; // cluster-cluster correlations
+    std::vector<uint64_t> css; // surface-surface correlations
+    std::vector<uint64_t> cmm; // surface-surface correlations
+    std::vector<uint64_t> caa; // avalanche-avalanche correlations
+    std::vector<uint64_t> cll; // damage-damage distribution
+    std::vector<uint64_t> cDD; // damage-damage distribution
+    std::vector<uint64_t> csD; // damage-damage distribution
     uint64_t Nc;
     uint64_t Na;
 
@@ -57,9 +57,9 @@ class ma : public hooks {
     long double lv;
 
 
-    std::list<std::list<unsigned>> avalanches;
+    std::list<std::list<graph::coordinate>> avalanches;
 
-    ma(double Lx, double Ly, unsigned Mx, unsigned My, double beta, unsigned Ncum);
+    ma(double Lx, double Ly, unsigned Mx, unsigned My, double beta);
     ~ma();
 
     void pre_fracture(const network &) override;
diff --git a/src/sample.cpp b/src/sample.cpp
new file mode 100644
index 0000000..b8af937
--- /dev/null
+++ b/src/sample.cpp
@@ -0,0 +1,69 @@
+
+#include "sample.hpp"
+#include <iostream>
+#include <cstdio>
+
+sample::sample(double Lx, double Ly, double beta) {
+  std::string filename = "fracture_" + std::to_string(Lx) + "_" + std::to_string(Ly) + "_" + std::to_string(beta) + "_sample.dat";
+  sample_file.open(filename, std::ifstream::app);
+}
+
+sample::~sample() {
+  sample_file.close();
+}
+
+void sample::pre_fracture(const network& n) {
+  sample_file << "<|";
+  sample_file << "\"vr\"->{";
+  for (const graph::vertex &v : n.G.vertices) {
+    sample_file << "{" << v.r.x << "," << v.r.y << "},";
+  }
+  sample_file << "},\"vp\"->{";
+  for (const graph::vertex &v : n.G.vertices) {
+    sample_file << "{";
+    for (const graph::coordinate &r : v.polygon) {
+      sample_file << "{" << r.x << "," << r.y << "},";
+    }
+    sample_file << "},";
+  }
+  sample_file << "},\"ur\"->{";
+  for (const graph::vertex &v : n.G.dual_vertices) {
+    sample_file << "{" << v.r.x << "," << v.r.y << "},";
+  }
+  sample_file << "},\"up\"->{";
+  for (const graph::vertex &v : n.G.dual_vertices) {
+    sample_file << "{";
+    for (const graph::coordinate &r : v.polygon) {
+      sample_file << "{" << r.x << "," << r.y << "},";
+    }
+    sample_file << "},";
+  }
+  sample_file << "},\"e\"->{";
+  for (const graph::edge &e : n.G.edges) {
+    sample_file << "{" << e.v[0] << "," << e.v[1] << "},";
+  }
+  sample_file << "},\"ec\"->{";
+  for (const graph::edge &e : n.G.edges) {
+    sample_file << "{" << e.crossings[0] << "," << e.crossings[1] << "},";
+  }
+  sample_file << "},\"d\"->{";
+  for (const graph::edge &e : n.G.dual_edges) {
+    sample_file << "{" << e.v[0] << "," << e.v[1] << "},";
+  }
+  sample_file << "},\"dc\"->{";
+  for (const graph::edge &e : n.G.dual_edges) {
+    sample_file << "{" << e.crossings[0] << "," << e.crossings[1] << "},";
+  }
+  sample_file << "},\"data\"->{";
+}
+
+void sample::bond_broken(const network& net, const current_info& cur, unsigned i) {
+  long double c = logl(cur.conductivity / fabs(cur.currents[i])) + net.thresholds[i];
+  sample_file << "{" << i << "," << c << "," << cur.conductivity << "},";
+}
+
+void sample::post_fracture(network &n) {
+  sample_file << "}";
+  sample_file << "|>\n";
+}
+
diff --git a/src/sample.hpp b/src/sample.hpp
new file mode 100644
index 0000000..d5d6fe5
--- /dev/null
+++ b/src/sample.hpp
@@ -0,0 +1,30 @@
+
+#include <cstring>
+#include <fstream>
+#include <string>
+#include <cinttypes>
+#include <sstream>
+#include <functional>
+#include <iostream>
+#include <array>
+
+#include <hooks.hpp>
+#include <graph.hpp>
+#include <network.hpp>
+
+class sample : public hooks {
+  // need:
+  //  - interface for turning on and off specific measurements
+  //
+  private:
+    std::ofstream sample_file;
+    
+  public:
+    sample(double, double, double);
+    ~sample();
+
+    void pre_fracture(const network &) override;
+    void bond_broken(const network& net, const current_info& cur, unsigned i) override;
+    void post_fracture(network &n) override;
+};
+
diff --git a/src/sample_fracture.cpp b/src/sample_fracture.cpp
new file mode 100644
index 0000000..42a6a5a
--- /dev/null
+++ b/src/sample_fracture.cpp
@@ -0,0 +1,65 @@
+
+#include <random>
+#include <iostream>
+
+#include <cholmod.h>
+
+#include "randutils/randutils.hpp"
+
+#include <graph.hpp>
+#include <network.hpp>
+#include <hooks.hpp>
+#include "sample.hpp"
+
+#include <csignal>
+#include <cstring>
+#include <atomic>
+
+int main(int argc, char* argv[]) {
+
+  int opt;
+
+  unsigned N = 1;
+  double Lx = 16;
+  double Ly = 16;
+  double  beta = 0.5;
+
+  while ((opt = getopt(argc, argv, "N:X:Y:b:")) != -1) {
+    switch (opt) {
+      case 'N':
+        N = (unsigned)atof(optarg);
+        break;
+      case 'X':
+        Lx = atof(optarg);
+        break;
+      case 'Y':
+        Ly = atof(optarg);
+        break;
+      case 'b':
+        beta = atof(optarg);
+        break;
+      default:
+        exit(1);
+    }
+  }
+
+  cholmod_common c;
+  CHOL_F(start)(&c);
+
+  sample meas(Lx, Ly, beta);
+
+  randutils::auto_seed_128 seeds;
+  std::mt19937 rng{seeds};
+
+  for (unsigned trial = 0; trial < N; trial++) {
+    graph G(Lx, Ly, rng);
+    network network(G, &c);
+    network.set_thresholds(beta, rng);
+    network.fracture(meas);
+  }
+
+  CHOL_F(finish)(&c);
+
+  return 0;
+}
+
diff --git a/src/sample_fracture_square.cpp b/src/sample_fracture_square.cpp
new file mode 100644
index 0000000..fb2eb33
--- /dev/null
+++ b/src/sample_fracture_square.cpp
@@ -0,0 +1,67 @@
+
+#include <random>
+#include <iostream>
+
+#include <cholmod.h>
+
+#include "randutils/randutils.hpp"
+
+#include <graph.hpp>
+#include <network.hpp>
+#include <hooks.hpp>
+#include "sample.hpp"
+
+#include <csignal>
+#include <cstring>
+#include <atomic>
+
+int main(int argc, char* argv[]) {
+
+  int opt;
+
+  unsigned N = 1;
+  unsigned Lx = 16;
+  unsigned Ly = 16;
+  double  beta = 0.5;
+
+  while ((opt = getopt(argc, argv, "N:X:Y:b:")) != -1) {
+    switch (opt) {
+      case 'N':
+        N = (unsigned)atof(optarg);
+        break;
+      case 'X':
+        Lx = atoi(optarg);
+        break;
+      case 'Y':
+        Ly = atoi(optarg);
+        break;
+      case 'b':
+        beta = atof(optarg);
+        break;
+      default:
+        exit(1);
+    }
+  }
+
+  cholmod_common c;
+  CHOL_F(start)(&c);
+
+  sample meas(Lx, Ly, beta);
+
+  randutils::auto_seed_128 seeds;
+  std::mt19937 rng{seeds};
+
+  graph G(Lx, Ly);
+  network perm_network(G, &c);
+
+  for (unsigned trial = 0; trial < N; trial++) {
+    network tmp_network(perm_network);
+    tmp_network.set_thresholds(beta, rng);
+    tmp_network.fracture(meas);
+  }
+
+  CHOL_F(finish)(&c);
+
+  return 0;
+}
+