angle_repose_main.cpp

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

#include "data_dumper.hpp"
#include "gen_pack.hpp"
#include "gen_wall_box_plane.hpp"
#include "gravity.hpp"
#include "model_linear_spring.hpp"
#include "shape_sphere.hpp"
#include "simulation.hpp"
#include <iostream>
#include <unordered_map>
using namespace netdem;
using namespace std;
 
int main(int argc, char **argv) {
  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);
 
  Simulation *sim = new Simulation();
 
  sim->domain_manager.SetBound(-0.2, -0.2, -0.2, 1.2, 6.2, 3.2);
  sim->domain_manager.SetDecomposition(total_rank, 1, 1);
  sim->domain_manager.SetCellSpacing(0.3, 0.3, 0.3);
 
  LinearSpring cnt_model = LinearSpring(2.0e6, 1.0e6, 0.5, 0.0);
  cnt_model.label = "cnt_model_pp";
  sim->scene.InsertContactModel(&cnt_model);
 
  cnt_model = LinearSpring(2.0e6, 1.0e6, 0.0, 0.0);
  cnt_model.label = "cnt_model_pw";
  sim->scene.InsertContactModel(&cnt_model);
 
  sim->scene.SetNumberOfMaterials(2);
  sim->scene.SetCollisionModel(0, 0, "cnt_model_pp");
  sim->scene.SetCollisionModel(1, 0, "cnt_model_pw");
  sim->scene.SetCollisionModel(1, 1, "cnt_model_pw");
 
  Sphere sphere_1 = Sphere(0.1);
  Sphere sphere_2 = Sphere(0.1);
  sim->scene.InsertShape(&sphere_1);
  sim->scene.InsertShape(&sphere_2);
 
  VecXT<Particle> particle_list = PackGenerator::GetGridPack(
      1, 1, 3, 0.5, 0.5, 1.5, 9, 9, 27, sim->scene.GetShapes());
  for (auto &p : particle_list) {
    p.damp_numerical = 0.7;
  }
  sim->scene.InsertParticle(particle_list);
 
  WallBoxPlane wall_box(1, 6, 3, 0.5, 3, 1.5);
  wall_box.ImportToScene(&(sim->scene));
  sim->scene.wall_list[3]->SetPosition(0, -5, 0);
  for (auto w_ptr : sim->scene.wall_list) {
    w_ptr->material_type = 1;
  }
  sim->scene.wall_list[4]->material_type = 0; // ground wall
 
  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("tmp/out/");
  data_dumper.SetSaveByCycles(100);
  data_dumper.SaveShapeInfoAsSTL();
  sim->modifier_manager.Insert(&data_dumper);
  sim->modifier_manager.Enable(data_dumper.label);
 
  sim->Run(3);
 
  sim->scene.wall_list[3]->SetPosition(0, 0, 0);
  sim->Run(7);
 
  delete sim;
 
  MPI_Finalize();
  return 0;
}