90_random_packing_trimesh.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 "gen_wall_box_plate.hpp"
#include "gravity.hpp"
#include "model_volume_based.hpp"
#include "shape_trimesh.hpp"
#include "simulation.hpp"
#include "solver_ann_pp.hpp"
#include "solver_ann_pplane.hpp"
#include <iostream>
#include <unordered_map>
using namespace netdem;
using namespace std;
 
void RandomPackingTrimesh(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
  VolumeBased cnt_model = VolumeBased(1.0e11, 1.0e6, 0.5, 0.0);
  sim->scene.InsertContactModel(&cnt_model);
  sim->scene.SetNumberOfMaterials(1);
  sim->scene.SetCollisionModel(0, 0, cnt_model.label);
 
  // shape template and particles
  TriMesh tri_mesh;
  tri_mesh.InitFromSTL("data/particle_template.stl");
  tri_mesh.Decimate(200);
  tri_mesh.AlignAxes();
  tri_mesh.SetSize(0.1);
  sim->scene.InsertShape(&tri_mesh);
 
  VecXT<Particle> particle_list = PackGenerator::GetGridPack(
      1, 1, 1, 0, 0, 0, 8, 8, 8, sim->scene.GetShapes());
  for (auto &p : particle_list) {
    p.damp_numerical = 0.7;
  }
  sim->scene.InsertParticle(particle_list);
 
  // wall based on plane
  WallBoxPlane wall_box(1, 1, 1, 0, 0, 0);
  wall_box.ImportToScene(&(sim->scene));
 
  // manipulate the solver settings
  string root_dir = "local/examples/netdem/ann_models/";
  SolverANNPP cnt_solver_pp;
  cnt_solver_pp.Init(root_dir + "trimesh_trimesh/ann_classifier.xml",
                     root_dir + "trimesh_trimesh/ann_regressor.xml");
  SolverANNPPlane cnt_solver_pw;
  cnt_solver_pw.Init(root_dir + "trimesh_plane/ann_classifier.xml",
                     root_dir + "trimesh_plane/ann_regressor.xml");
 
  int solver_id_pp =
      sim->dem_solver.contact_solver_factory.InsertSolver(&cnt_solver_pp);
  int solver_id_pw =
      sim->dem_solver.contact_solver_factory.InsertSolver(&cnt_solver_pw);
 
  auto shape_list = sim->scene.GetShapes();
  for (auto shape_ptr_1 : shape_list) {
    for (auto shape_ptr_2 : shape_list) {
      if (shape_ptr_1->shape_type == Shape::Type::trimesh &&
          shape_ptr_2->shape_type == Shape::Type::trimesh) {
        shape_ptr_1->use_customized_solver = true;
        shape_ptr_2->use_customized_solver = true;
        sim->dem_solver.contact_solver_factory.CustomizeSolverPP(
            shape_ptr_1->id, shape_ptr_2->id, solver_id_pp);
      } else if (shape_ptr_1->shape_type == Shape::Type::trimesh &&
                 shape_ptr_2->shape_type == Shape::Type::plane) {
        shape_ptr_1->use_customized_solver = true;
        shape_ptr_2->use_customized_solver = true;
        sim->dem_solver.contact_solver_factory.CustomizeSolverPW(
            shape_ptr_1->id, shape_ptr_2->id, solver_id_pw);
      }
    }
  }
 
  // gravity modifier
  Gravity grav;
  grav.Init(sim);
  sim->modifier_manager.Insert(&grav);
  sim->modifier_manager.Enable(grav.label);
 
  // data dumper
  DataDumper data_dumper;
  data_dumper.Init(sim);
  data_dumper.SetRootPath("tmp/out/");
  data_dumper.SetSaveByCycles(100);
  data_dumper.SaveShapeInfoAsSTL();
  data_dumper.dump_wall_info = true;
  data_dumper.dump_contact_info = true;
  sim->modifier_manager.Insert(&data_dumper);
  sim->modifier_manager.Enable(data_dumper.label);
 
  // sim->dem_solver.Cycle(1);
  sim->Run(3);
 
  delete sim;
 
  MPI_Finalize();
}