90_random_packing.cpp

This is an example of how to use the netdem library.

#include "contact_solver_factory.hpp"
#include "data_dumper.hpp"
#include "gen_pack.hpp"
#include "gen_wall_box_plane.hpp"
#include "gravity.hpp"
#include "model_linear_spring.hpp"
#include "model_volume_based.hpp"
#include "shape_coded_netsdf.hpp"
#include "shape_netsdf.hpp"
#include "shape_plane.hpp"
#include "shape_trimesh.hpp"
#include "simulation.hpp"
#include "stl_model.hpp"
#include <iostream>
#include <unordered_map>
using namespace netdem;
using namespace std;
 
void RandomPacking(int argc, char **argv) {
  // mpi initialization
  int self_rank, total_rank;
  MPI_Init(&argc, &argv);
  MPI_Comm_rank(MPI_COMM_WORLD, &self_rank);
  MPI_Comm_size(MPI_COMM_WORLD, &total_rank);
 
  // new simulation
  Simulation *sim = new Simulation();
 
  // domain settings
  sim->domain_manager.SetBound(-0.6, -0.6, -0.6, 0.6, 0.6, 0.6);
  sim->domain_manager.SetDecomposition(total_rank, 1, 1);
  sim->domain_manager.SetCellSpacing(0.3, 0.3, 0.3);
 
  // contact model
  sim->dem_solver.contact_solver_factory.settings.solver_type =
      ContactSolverSettings::SolverType::sdf;
  sim->dem_solver.contact_solver_factory.settings.sdf_potential_type = 0;
  LinearSpring cnt_model = LinearSpring(2.0e6, 1.0e6, 0.5, 0.1);
  sim->scene.InsertContactModel(&cnt_model);
  sim->scene.SetNumberOfMaterials(1);
  sim->scene.SetCollisionModel(0, 0, cnt_model.label);
 
  // // shape template and particles
  // NetSDF netsdf;
  // netsdf.InitFromModelFiles("ann_SDF.xml", "ann_SPF.xml");
  // sim->scene.InsertShape(&netsdf);
 
  // coded netsdf
  CodedNetSDF netsdf;
  netsdf.InitFromModelFiles("ann_SDF.xml", "latent_code.txt", 1);
  netsdf.SetSize(0.1);
  sim->scene.InsertShape(&netsdf);
 
  // // shape template and particles
  // TriMesh trimesh;
  // trimesh.InitFromSTL("mms_01/shape_template.stl");
  // trimesh.Decimate(2000);
  // trimesh.AlignAxes();
  // trimesh.SetSize(0.1);
  // sim->scene.InsertShape(&trimesh);
 
  VecXT<Particle> particle_list = PackGenerator::GetGridPack(
      1, 1, 0.2, 0, 0, 0.4, 5, 5, 1, sim->scene.GetShapes());
  for (auto &p : particle_list) {
    p.SetVelocity(0, 0, -2.0);
  }
 
  WallBoxPlane wall_box(1, 1, 1, 0, 0, 0);
  wall_box.ImportToScene(&(sim->scene));
 
  Gravity grav;
  grav.Init(sim);
  sim->modifier_manager.Insert(&grav);
  sim->modifier_manager.Enable(grav.label);
 
  DataDumper data_dumper;
  data_dumper.Init(sim);
  data_dumper.SetRootPath("out/");
  data_dumper.SetSaveByCycles(100);
  data_dumper.SaveShapeInfoAsSTL();
  data_dumper.dump_wall_info = true;
  data_dumper.dump_contact_info = true;
  data_dumper.dump_mesh = true;
  sim->modifier_manager.Insert(&data_dumper);
  sim->modifier_manager.Enable(data_dumper.label);
 
  for (int i = 0; i < 20; i++) {
    sim->scene.InsertParticle(particle_list);
    sim->Run(0.1);
  }
  sim->Run(3.0);
 
  delete sim;
 
  MPI_Finalize();
}