GCC Code Coverage Report

Directory: ./
File: src/system.cpp
Date: 2025-02-03 10:58:24
Exec Total Coverage
Lines: 185 230 80.4%
Functions: 16 18 88.9%
Branches: 171 299 57.2%
Line Branch Exec Source
1 #include <fstream>
2 #include <iostream>
3 #include <limits>
4 #include <sstream>
5
6 #include "analyzers.hpp"
7 #include "interaction.hpp"
8 #include "multiindex.hpp"
9 #include "particle.hpp"
10 #include "rng.hpp"
11 #include "system.hpp"
12
13 75 System::System(std::vector<Particle> &particles, const YAML::Node &config, double t,
14 75 const YAML::Node &addParticlesConfig)
15
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 150 : particles(particles), t(t), L(YAML::parse<Vec>(config, "L")),
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 150 T(YAML::parse<double>(config, "T", std::numeric_limits<double>::quiet_NaN())),
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 150 mu(YAML::parse<double>(config, "mu", std::numeric_limits<double>::quiet_NaN())), E(0.),
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 75 interaction(InteractionFactory::create(this, config["interaction"])) {
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 75 std::clog << "\nSystem:";
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 75 std::clog << "\n\tL:";
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 300 for (int i = 0; i < DIM; ++i) {
22
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 225 std::clog << " " << this->L[i];
23 }
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 75 if (std::isfinite(T)) {
25
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 75 std::clog << "\n\tT: " << this->T;
26 }
27
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 75 if (std::isfinite(mu)) {
28
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 50 std::clog << "\n\tmu: " << this->mu;
29 }
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 75 std::clog << "\nParticles:";
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 75 std::clog << "\n\t" << particles.size() << " already in the system";
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 75 initParticles(addParticlesConfig);
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 150 std::clog << "\n\ttotal: " << particles.size() << " (N/V = " << particles.size() / L.prod()
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 75 << ")";
35
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 75 if (!allParticlesInside()) {
36 ✗ throw std::runtime_error(
37 ✗ "Could not initialize the system because some particles would be outside of the box.");
38 }
39
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 75 if (particles.size() == 0) {
40 50 std::clog << "\nWARNING: Initialized system with zero particles. Ensure that this is intended, "
41
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 50 "otherwise check the particle initialization in the config!";
42 }
43 75 }
44
45
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 73 System::~System() { delete interaction; }
46
47 ✗ void System::ensureAnalyzer(const std::string &key) {
48 ✗ if (!analyzers[key]) {
49 ✗ analyzers[key] = AnalyzerFactory::create(this, key);
50 }
51 }
52
53 ✗ void System::updateAnalyzers() {
54 ✗ for (auto &[_, analyzer] : analyzers) {
55 ✗ analyzer->update();
56 }
57 }
58
59 10 int System::getNumSpecies() {
60 10 int maxSpecies = 0;
61
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 12 for (auto &p : particles) {
62
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 2 maxSpecies = std::max(maxSpecies, p.species);
63 }
64 10 return maxSpecies + 1;
65 }
66
67 4885 bool System::removeLastParticleIfHighEnergy(double threshold) {
68 4885 bool wasRemoved = false;
69 4885 try {
70 4885 double Eparticle = 0.;
71
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 4885 Eparticle = updateParticleState(particles.back(), ParticleUpdateType::INSERT);
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 4885 if (Eparticle >= threshold) {
73 ✗ std::clog << "\n\tParticle insertion skipped due to energy threshold (E=" << Eparticle
74 ✗ << " >= threshold=" << threshold << ")";
75 ✗ updateParticleMeta(particles.back(), ParticleUpdateType::DELETE);
76 ✗ particles.pop_back();
77 ✗ wasRemoved = true;
78 }
79 ✗ } catch (const std::runtime_error &e) {
80 ✗ std::clog << "\nWARNING: Could not check energy threshold of particle insertion because "
81 ✗ "interaction does not support single particle updates";
82 }
83 4885 return wasRemoved;
84 }
85
86 78 void System::initParticles(const YAML::Node &addParticlesConfig) {
87
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 78 if (addParticlesConfig) {
88
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 78 if (addParticlesConfig.IsSequence()) {
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 3 for (auto &c : addParticlesConfig) {
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 1 initParticlesItem(c);
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 3 }
92 } else {
93 77 initParticlesItem(addParticlesConfig);
94 }
95 }
96 78 }
97
98 78 void System::initParticlesItem(const YAML::Node &addParticlesConfig) {
99 78 int nBefore = particles.size();
100 78 double defaultEThreshold = 1e4;
101
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 78 if (addParticlesConfig["file"]) {
102 ✗ auto &config = addParticlesConfig["file"];
103 ✗ std::string filename = YAML::parse<std::string>(config, "filename");
104 ✗ std::ifstream particlesInitStream(filename, std::ios_base::in);
105 ✗ if (particlesInitStream.fail()) {
106 ✗ throw std::invalid_argument("Could not open initialization file " + filename);
107 }
108 ✗ double EThreshold = YAML::parse<double>(config, "EThreshold", defaultEThreshold);
109 ✗ initParticlesFromFile(particlesInitStream, EThreshold);
110 ✗ std::clog << "\n\tAdded " << particles.size() - nBefore << " from file " << filename;
111 }
112
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 78 if (addParticlesConfig["lattice"]) {
113 28 auto &config = addParticlesConfig["lattice"];
114
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 56 std::string cell = YAML::parse<std::string>(config, "cell", "sc");
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 56 Vec spacing = YAML::parse<Vec>(config, "spacing", 1.);
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 56 Vec margin = YAML::parse<Vec>(config, "margin", 0.5);
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 56 Vec offset = YAML::parse<Vec>(config, "offset", 0.);
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 56 int NTarget = YAML::parse<int>(config, "N", 0);
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 56 double EThreshold = YAML::parse<double>(config, "EThreshold", defaultEThreshold);
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 28 YAML::Node particleProperties;
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 28 if (config["particleProperties"]) {
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 28 particleProperties = config["particleProperties"];
123 }
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 28 initParticlesOnLattice(cell, spacing, margin, offset, particleProperties, NTarget, EThreshold);
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 28 std::clog << "\n\tAdded " << particles.size() - nBefore << " on " << cell << " lattice";
126 56 }
127 78 }
128
129 16 void System::initParticlesFromFile(std::istream &stream, double EThreshold) {
130 // Not very robust, I know
131 16 std::string line;
132
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 171 while (std::getline(stream, line)) {
133
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 155 if (line.empty() || line.front() == '#') {
134 3 continue;
135 }
136
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 152 std::istringstream iss(line);
137
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 152 iss.exceptions(std::ios::failbit);
138 152 Vec r;
139 152 Vec v = Vec::Constant(0.);
140 152 Vec u = Vec::Constant(0.);
141 152 Real sigma = 1;
142 152 Real m = 1;
143 152 Real gamma = 1;
144 152 int species = 0;
145
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 608 for (int i = 0; i < DIM; ++i) {
146 456 Real ri;
147
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 456 iss >> ri;
148
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 456 if (ri >= L[i]) {
149 ✗ throw std::invalid_argument("Particle " + std::to_string(i) +
150 ✗ " is not inside simulation box. Aborting");
151 }
152 456 r[i] = ri;
153 }
154 try {
155
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 608 for (int i = 0; i < DIM; ++i) {
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 456 iss >> v[i];
157 }
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 152 iss >> sigma;
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 152 iss >> m;
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 152 iss >> gamma;
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 152 iss >> species;
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 152 } catch (const std::istream::failure &e) {
163 // ignore optional properties
164 152 }
165
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 152 particles.emplace_back(r, v, u, sigma, m, gamma, species);
166
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 152 removeLastParticleIfHighEnergy(EThreshold);
167 152 }
168 16 }
169
170 28 static void removeAverageVelocity(std::vector<Particle> &particles) {
171 28 Vec vAvg = Vec::Constant(0.);
172
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 4761 for (const Particle &p : particles) {
173 4733 vAvg += p.v;
174 }
175 28 vAvg /= particles.size();
176
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 4761 for (Particle &p : particles) {
177 4733 p.v -= vAvg;
178 }
179 28 }
180
181 28 void System::initParticlesOnLattice(const std::string &cell, Vec spacing, const Vec &margin,
182 const Vec &offset, const YAML::Node &particleProperties,
183 int NTarget, double EThreshold) {
184
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 28 if ((spacing.array() <= 0.).any() || (spacing.array() == 1.).all()) {
185 ✗ spacing = Vec::Constant(1. + 1e-10); // Safety margin due to floating point errors
186 }
187
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 28 Vec a = spacing;
188
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 28 if (cell == "bcc") {
189 1 a *= 2. / std::sqrt(3.);
190
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 27 } else if (cell == "fcc") {
191 1 a *= std::sqrt(2.);
192 }
193
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 28 std::vector<Vec> bravais;
194 28 if constexpr (DIM == 2) {
195 if (cell == "sc") {
196 bravais.push_back(Vec::Constant(0.));
197 } else {
198 throw std::invalid_argument("Grid type " + cell + " not implemented!");
199 }
200 }
201 28 if constexpr (DIM == 3) {
202
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 28 if (cell == "sc") {
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 26 bravais.push_back(Vec::Constant(0.));
204
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 2 } else if (cell == "bcc") {
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 1 bravais.push_back(Vec::Constant(0.));
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 1 bravais.push_back(Vec{0.5, 0.5, 0.5});
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 1 } else if (cell == "fcc") {
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 1 bravais.push_back(Vec::Constant(0.));
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 1 bravais.push_back(Vec{0., 0.5, 0.5});
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 1 bravais.push_back(Vec{0.5, 0., 0.5});
211
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 1 bravais.push_back(Vec{0.5, 0.5, 0.});
212 } else {
213 ✗ throw std::invalid_argument("Grid type " + cell + " not implemented!");
214 }
215 }
216
217
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 56 Real sigma = YAML::parse<Real>(particleProperties, "sigma", 1.);
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 56 Real m = YAML::parse<Real>(particleProperties, "m", 1.);
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 56 Real gamma = YAML::parse<Real>(particleProperties, "gamma", 1.);
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 56 int species = YAML::parse<int>(particleProperties, "species", 0);
221 28 bool vMaxwell = false;
222 28 bool uRandom = false;
223 28 Vec v, u = Vec::Zero();
224 28 try {
225
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 84 if (YAML::parse<std::string>(particleProperties, "v", "") == "maxwell") {
226 ✗ vMaxwell = true;
227 }
228 ✗ } catch (const YAML::BadConversion &e) {
229 ✗ v = YAML::parse<Vec>(particleProperties, "v", 0.);
230 }
231 28 try {
232
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 84 if (YAML::parse<std::string>(particleProperties, "u", "") == "random") {
233 ✗ uRandom = true;
234 }
235 ✗ } catch (const YAML::BadConversion &e) {
236 ✗ u = YAML::parse<Vec>(particleProperties, "u", 0.);
237 }
238
239
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 28 RNG rng;
240 28 std::gamma_distribution<double> maxwellDist(1.5, T);
241
242 28 size_t NSpecies = 0;
243 28 ArrayI bounds = (L.array() / a.array() + 1).cast<int>();
244
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 10202 for (ArrayI multi : Multiindex<DIM>(bounds)) {
245 10174 Vec rc = multi.cast<Real>() * a.array();
246
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 20516 for (auto &b : bravais) {
247 10342 Vec r = rc + (b.array() * a.array()).matrix() + offset;
248
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 10342 if ((r.array() >= margin.array() && r.array() < L.array() - margin.array()).all()) {
249
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 4733 if (vMaxwell) {
250 ✗ v = rng.vecNormal().normalized();
251 ✗ v *= maxwellDist(rng.engine);
252 }
253
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 4733 if (uRandom) {
254 ✗ do {
255 ✗ u = rng.vecNormal();
256 ✗ } while (u.squaredNorm() - 1. > 1e-5);
257 }
258
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 4733 u.normalize();
259
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 4733 particles.emplace_back(r, v, u, sigma, m, gamma, species);
260
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 4733 if (!removeLastParticleIfHighEnergy(EThreshold)) {
261 4733 ++NSpecies;
262 }
263
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 4733 if (NTarget && NSpecies == (size_t)NTarget) {
264 ✗ removeAverageVelocity(particles);
265 ✗ return;
266 }
267 }
268 }
269 }
270 28 removeAverageVelocity(particles);
271
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 28 if (NTarget && NSpecies < (size_t)NTarget) {
272 ✗ throw std::runtime_error("Could not fit " + std::to_string(NTarget) + " particles of species" +
273 ✗ std::to_string(species) + " into the box (only got to " +
274 ✗ std::to_string(NSpecies) + ").");
275 }
276 28 }
277
278 5 void System::updateParticleMeta(Particle &p, ParticleUpdateType particleUpdateType) {
279 5 interaction->updateParticleMeta(p, particleUpdateType);
280 5 }
281
282 5094 double System::updateParticleState(Particle &p, ParticleUpdateType particleUpdateType) {
283 5094 p.Fext.setZero();
284 5094 p.Eext = 0.;
285 5094 p.Fint.setZero();
286 5094 return interaction->updateParticleState(p, particleUpdateType);
287 }
288
289 4495 void System::updateState() {
290 4495 E = 0.;
291
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 22552 for (auto &p : particles) {
292 18057 p.Fext.setZero();
293 18057 p.Eext = 0.;
294 18057 p.Fint.setZero();
295 }
296 4495 interaction->updateState();
297 4495 }
298
299 13873 bool System::particleInside(const Particle &p) {
300
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 13873 if ((p.r.array() >= L.array() || p.r.array() < 0).any()) {
301 3133 return false;
302 }
303 return true;
304 }
305
306 78 bool System::allParticlesInside() {
307
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 4811 for (auto &p : particles) {
308
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 4733 if (!particleInside(p)) {
309 ✗ return false;
310 }
311 }
312 78 return true;
313 }
314
315 6007 void System::applyPeriodic(Particle &p) {
316
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 9140 while (!particleInside(p)) {
317 3133 Vec shift = (p.r.array() / L.array()).floor();
318 3133 p.box += shift.cast<int>().array();
319 6266 p.r.array() -= shift.array() * L.array();
320 }
321 6007 }
322
323 24 void System::applyPeriodic() {
324 24 #pragma omp parallel for
325 for (auto &p : particles) {
326 applyPeriodic(p);
327 }
328 24 }
329