SubLattice.hpp

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//                                                         //
// Copyright (c) 2003-2013 by The University of Queensland //
// Earth Systems Science Computational Centre (ESSCC)      //
// http://www.uq.edu.au/esscc                              //
//                                                         //
// Primary Business: Brisbane, Queensland, Australia       //
// Licensed under the Open Software License version 3.0    //
// http://www.opensource.org/licenses/osl-3.0.php          //
//                                                         //

// -- project includes -

#include "Parallel/SubLattice.h"
#include "Parallel/MpiInfo.h"
#include "Parallel/mpivbuf.h"
#include "Parallel/mpisgvbuf.h"
#include "Parallel/mpibarrier.h"
#include "Parallel/mpia2abuf.h"
#include "Model/BondedInteraction.h"
#include "Model/CappedBondedInteraction.h"
#include "Model/ShortBondedInteraction.h"
#include "Model/DampingIGP.h"
#include "Model/Damping.h"
#include "Model/RotDamping.h"
#include "Model/ABCDampingIGP.h"
#include "Model/ABCDamping.h"
#include "Model/LocalDampingIGP.h"
#include "Model/LocalDamping.h"
#include "Model/RotLocalDamping.h"
#include "Model/FrictionInteraction.h"
#include "Model/FractalFriction.h"
#include "Model/AdhesiveFriction.h"
#include "Model/VWFrictionInteraction.h"
#include "Model/RotFricInteraction.h"
#include "Model/RotElasticInteraction.h"
#include "Model/RotThermFricInteraction.h"
#include "Model/RotThermElasticInteraction.h"
#include "Model/RotThermBondedInteraction.h"
#include "Model/HertzianElasticInteraction.h"
#include "Model/HertzianViscoElasticFrictionInteraction.h"
#include "Model/HertzianViscoElasticInteraction.h"
#include "Model/LinearDashpotInteraction.h"
#include "Model/MeshData.h"
#include "Model/MeshData2D.h"
#include "Model/ETriMeshInteraction.h"
#include "Model/BTriMeshInteraction.h"
#include "Model/BMesh2DInteraction.h"
#include "Model/EMesh2DInteraction.h"

// --- parallel storage includes ---
#include "ppa/src/pp_array.h"
#include "pis/pi_storage_eb.h"
#include "pis/pi_storage_ed.h"
#include "pis/pi_storage_ed_t.h"
#include "pis/pi_storage_ne.h"
#include "pis/pi_storage_ne_t.h"
#include "pis/pi_storage_single.h"
#include "pis/trimesh_pis.h"
#include "pis/trimesh_pis_ne.h"
#include "pis/trimesh_pis_eb.h"
#include "pis/mesh2d_pis_eb.h"
#include "pis/mesh2d_pis_ne.h"

// --- field includes ---
#include "Fields/ScalarParticleFieldSlaveTagged.h"
#include "Fields/VectorParticleFieldSlaveTagged.h"
#include "Fields/ScalarInteractionFieldSlaveTagged.h"
#include "Fields/ScalarParticleFieldSlaveTagged.h"
#include "Fields/ScalarInteractionFieldSlaveTagged.h"
#include "Fields/CheckedScalarInteractionFieldSlave.h"
#include "Fields/CheckedScalarInteractionFieldSlaveTagged.h"
#include "Fields/VectorTriangleFieldSlave.h"
#include "Fields/ScalarTriangleFieldSlave.h"
#include "Fields/VectorEdge2DFieldSlave.h"

#include "Model/BodyForceGroup.h"

#include <mpi.h>
#include <stdlib.h>
#include <stdexcept>

// -- STL includes --
#include <algorithm>
#include <stdexcept>
#include <boost/limits.hpp>
using std::runtime_error;

// -- IO includes --
#include <iostream>
using std::cerr;
using std::flush;
using std::endl;
using esys::lsm::CLatticeParam;

//----------------------------------------------
//   TSubLattice functions
//----------------------------------------------

template <class T>
TSubLattice<T>::TSubLattice(
  const CLatticeParam &param,
  int rank,
  MPI_Comm comm,
  MPI_Comm worker_comm
)
  : m_ppa(NULL),
    m_dpis(),
    m_bpis(),
    m_singleParticleInteractions(),
    m_damping(),
    m_WIG(),
    m_mesh(),
    m_mesh2d(),
    m_dt(0),
    m_nrange(0),
    m_alpha(0),
    m_last_ns(0),
    m_temp_conn(),
    m_rank(0),
    m_comm(MPI_COMM_NULL),
    m_tml_comm(MPI_COMM_NULL),
    m_worker_comm(MPI_COMM_NULL),
    m_tml_worker_comm(MPI_COMM_NULL),
    m_dims(3, 0),
    packtime(0),
    unpacktime(0),
    commtime(0.0),
    forcetime(0.0),
    m_field_slaves(),
    m_pTimers(NULL)
{
  // cout << "TSubLattice<T>::TSubLattice at " << rank << endl << flush;
  // -- MPI stuff  --
  m_rank=rank;

  // set global communicator
  m_comm=comm;
  m_tml_comm.setComm(m_comm);

  m_dims = param.processDims();
  
  m_worker_comm=worker_comm;
  //  MPI_Comm_size(m_worker_comm,&m_num_workers);
  m_tml_worker_comm.setComm(m_worker_comm);


  // -- set parameters
  m_alpha=param.alpha();
  m_nrange=param.nrange();
  // cout << "dt,nrange,alpha : " << m_dt << " , " << m_nrange << " , " << m_alpha << "\n";
  
  commtime=0.0;
  packtime=0.0;
  unpacktime=0.0;
  forcetime=0.0;
  
  m_last_ns=-1;
}

template <class T>
TSubLattice<T>::~TSubLattice()
{
  console.Debug() << "TSubLattice<T>::~TSubLattice(): enter\n";
  console.Debug()
    << "TSubLattice<T>::~TSubLattice():"
    << " deleting wall interaction groups...\n";
  for(
      typename map<string,AWallInteractionGroup<T>*>::iterator vit=m_WIG.begin();
    vit!=m_WIG.end();
    vit++
  )
  {
    delete vit->second;
  }
  console.Debug()
    << "TSubLattice<T>::~TSubLattice():"
    << " deleting particle array...\n";
  if (m_ppa != NULL) delete m_ppa;
  console.Debug() << "TSubLattice<T>::~TSubLattice(): exit\n";
}

template <class T>
void TSubLattice<T>::initNeighborTable(const Vec3& min,const Vec3& max)
{
  console.XDebug() << "TSubLattice<T>::initNeighborTable(" << min <<  "," << max << ")\n";
  // make size fit range
  double xsize=max.X()-min.X();
  xsize=m_nrange*ceil(xsize/m_nrange);
  double ysize=max.Y()-min.Y();
  ysize=m_nrange*ceil(ysize/m_nrange);
  double zsize=max.Z()-min.Z();
  zsize=m_nrange*ceil(zsize/m_nrange);
  Vec3 grow=Vec3(xsize,ysize,zsize)-(max-min); // size increase
  Vec3 nmin=min-0.5*grow; // distribute symmetrically
  Vec3 nmax=max+0.5*grow;
  console.XDebug() << "range=" << m_nrange << ", new min,max: " << nmin << ", " << nmax << "\n";
  
  // construct particle array
  TML_Comm *ntcomm=new TML_Comm(m_worker_comm);
  m_ppa=new  ParallelParticleArray<T>(ntcomm,m_dims,nmin,nmax,m_nrange,m_alpha);
  //m_ppa=new  ParallelParticleArray<T>(ntcomm,3,nmin,nmax,m_nrange);
  
  //  makeFields(); // put here to make sure ppa is initialized before makeFields
  
  console.XDebug() << "end TSubLattice<T>::initNeighborTable\n";
}

template <class T>
void TSubLattice<T>::do2dCalculations(bool do2d)
{
  T::setDo2dCalculations(do2d);
}

template <class T>
int TSubLattice<T>::getNumParticles()
{
  return m_ppa->getInnerSize();
}

template <class T>
void TSubLattice<T>::initNeighborTable(const Vec3& min,const Vec3& max,const vector<bool>& circ)
{
  console.XDebug() << "TSubLattice<T>::initNeighborTable(" << min <<  "," << max << ") circ\n";
  double xsize,ysize,zsize;
  // if dimension is circular, check if size fits range, otherwise make it fit
  // x - dim
  if(circ[0])
  {
    xsize=max.X()-min.X();
    if(fabs(xsize/m_nrange-lrint(xsize/m_nrange))>1e-6)
    {
      //console.Critical() << "circular x-dimension doesn't fit range !\n";
      console.Info() << "Circular x-size incompatible with range, adjusting...\n";
      m_nrange = xsize/floor(xsize/m_nrange);
      console.Info() << "New range = " << m_nrange << "\n";
    }
    //xsize+=2.0*m_nrange; // padding on the circular ends
  }
  else
  {
    xsize=max.X()-min.X();
    xsize=m_nrange*ceil(xsize/m_nrange);
  }
  // y - dim
  if(circ[1])
  {
    ysize=max.Y()-min.Y();
    if(fabs(ysize/m_nrange-lrint(ysize/m_nrange))>1e-6)
    {
      console.Critical() << "circular y-dimension doesn't fit range !\n";
    }
    ysize+=2.0*m_nrange; // padding on the circular ends
  }
  else
  {
    ysize=max.Y()-min.Y();
    ysize=m_nrange*ceil(ysize/m_nrange);
  }
  // z - dim
  if(circ[2])
  {
    zsize=max.Z()-min.Z();
    if(fabs(zsize/m_nrange-lrint(zsize/m_nrange))>1e-6)
    {
      console.Critical() << "circular z-dimension doesn't fit range !\n";
    }
    zsize+=2.0*m_nrange; // padding on the circular ends
  }
  else
  {
    zsize=max.Z()-min.Z();
    zsize=m_nrange*ceil(zsize/m_nrange);
  }
  Vec3 grow=Vec3(xsize,ysize,zsize)-(max-min); // size increase
  Vec3 nmin=min-0.5*grow; // distribute symmetrically
  Vec3 nmax=max+0.5*grow;
  console.XDebug() << "range, new min, max: " << m_nrange << " " << nmin << nmax << "\n";
  // construct particle array
  TML_Comm *ntcomm=new TML_Comm(m_worker_comm);
  m_ppa=new ParallelParticleArray<T>(ntcomm,m_dims,circ,nmin,nmax,m_nrange,m_alpha);
  
  //  makeFields(); // put here to make sure ppa is initialized before makeFields
  
  console.XDebug() << "end TSubLattice<T>::initNeighborTable (circ)\n";
}

template <class T>
void TSubLattice<T>::receiveParticles()
{
  console.XDebug() << "TSubLattice<T>::receiveParticles: enter\n";

  vector<T> recv_buffer;
  CMPIBarrier barrier(m_comm);

  m_tml_comm.recv_broadcast_cont_packed(recv_buffer,0);
  console.XDebug() << "recvd " << recv_buffer.size() << " particles \n";
  m_ppa->insert(recv_buffer);

  barrier.wait("TSubLattice<T>::receiveParticles");

  console.XDebug() << "TSubLattice<T>::receiveParticles: exit\n";
}


template <class T>
void TSubLattice<T>::receiveConnections()
{
  console.XDebug() << "TSubLattice<T>::receiveConnections: enter\n";

  vector<int> recv_buffer;
  CMPIBarrier barrier(m_comm);

  m_tml_comm.recv_broadcast_cont_packed(recv_buffer,0);
  console.XDebug() << "recvd " << recv_buffer.size() << " connections \n";
  vector<int>::iterator it;
  for (it = recv_buffer.begin(); it != recv_buffer.end(); it+=3)
  {
    if ( (m_ppa->getParticlePtrByIndex( *(it+1)) == NULL ) ||
         (m_ppa->getParticlePtrByIndex( *(it+2)) == NULL ) )
    {
      continue;
    }
    m_temp_conn[*(it)].push_back(*(it+1));
    m_temp_conn[*(it)].push_back(*(it+2));
  }

  barrier.wait("TSubLattice<T>::receiveConnections");

  console.XDebug() << "TSubLattice<T>::receiveConnections: exit\n";
}


template <class T>
void TSubLattice<T>::addWall()
{
  console.XDebug() << "TSubLattice<T>::addWall: enter\n" ;
  CVarMPIBuffer param_buffer(m_comm);
  param_buffer.receiveBroadcast(0);

  string name=param_buffer.pop_string();
  Vec3 ipos=param_buffer.pop_vector();
  Vec3 inorm=param_buffer.pop_vector();
  
  m_walls[name]=new CWall(ipos,inorm);

  console.XDebug() << "TSubLattice<T>::addWall: exit\n" ;
}

template <class T>
void TSubLattice<T>::addElasticWIG()
{
  console.XDebug() << "TSubLattice<T>::addElasticWIG: enter\n" ;
  CVarMPIBuffer param_buffer(m_comm);

  // receive params from master
  param_buffer.receiveBroadcast(0);

  CEWallIGP* wigp=extractEWallIGP(&param_buffer);

  string wallname=wigp->getWallName();
  map<string,CWall*>::iterator iter=m_walls.find(wallname);
  if(iter!=m_walls.end()){
    AWallInteractionGroup<T>* newCEWIG =
      new CEWallInteractionGroup<T>(
        &m_tml_worker_comm,
        m_walls[wallname],
        wigp
      );
    newCEWIG->Update(m_ppa);
    m_WIG.insert(make_pair(wigp->getName(),newCEWIG));
  } else {
    std::stringstream msg;
    msg << "wall name '" << wallname << "' not found in map of walls";
    throw std::runtime_error(msg.str().c_str());
  }

  delete wigp;
  console.XDebug() << "TSubLattice<T>::addElasticWIG: exit\n" ;
}


template <class T>
void TSubLattice<T>::addBondedWIG()
{
  console.XDebug() << "TSubLattice<T>::addBondedWIG: enter\n" ;
  CVarMPIBuffer param_buffer(m_comm);

  // receive params from master
  param_buffer.receiveBroadcast(0);

  CBWallIGP* wigp=extractBWallIGP(&param_buffer);

  string wallname=wigp->getWallName();
  map<string,CWall*>::iterator iter=m_walls.find(wallname);
  if(iter!=m_walls.end()){
    AWallInteractionGroup<T>* newCBWIG=new CBWallInteractionGroup<T>(&m_tml_worker_comm,m_walls[wallname],wigp);
    newCBWIG->Update(m_ppa);
    m_WIG.insert(make_pair(wigp->getName(),newCBWIG));
  } else {
    console.Error() << "wall name " << wallname << " not found in map of walls\n";
  }

  delete wigp;
  console.XDebug() << "TSubLattice<T>::addBondedWIG: exit\n" ;
}

template <class T>
void TSubLattice<T>::addDirBondedWIG()
{
  console.XDebug() << "TSubLattice<T>::addDirBondedWIG: enter\n" ;
  CVarMPIBuffer param_buffer(m_comm);

  // receive params from master
  param_buffer.receiveBroadcast(0);

  CSoftBWallIGP* wigp=extractSoftBWallIGP(&param_buffer);

  string wallname=wigp->getWallName();
  map<string,CWall*>::iterator iter=m_walls.find(wallname);
  if(iter!=m_walls.end()){
    AWallInteractionGroup<T>* newCDWIG=new CSoftBWallInteractionGroup<T>(&m_tml_worker_comm,m_walls[wallname],wigp);
    newCDWIG->Update(m_ppa);
    m_WIG.insert(make_pair(wigp->getName(),newCDWIG));
  } else {
    console.Error() << "wall name " << wallname << " not found in map of walls\n";
  }

  delete wigp;
  console.XDebug() << "TSubLattice<T>::addDirBondedWIG: exit\n" ;
}

template <class T>
void TSubLattice<T>::getWallPos()
{
  console.XDebug() << "TSubLattice<T>::getWallPosition: enter\n" ;
  CVarMPIBuffer param_buffer(m_comm);
  Vec3 pos;

  // receive params from master
  param_buffer.receiveBroadcast(0);

  std::string wname=param_buffer.pop_string();
  console.XDebug() << "Wall name: " << wname << "\n";
  
  // find wall
  map<string,CWall*>::iterator iter=m_walls.find(wname);
  if(iter!=m_walls.end()){
    pos=(iter->second)->getPos();
    console.XDebug() << "Wall pos: " << pos << "\n";
  } else {
    pos=Vec3(0.0,0.0,0.0);
  }

  vector<Vec3> vpos;
  vpos.push_back(pos);
  m_tml_comm.send_gather(vpos,0);
  console.XDebug() << "TSubLattice<T>::getWallPosition: exit\n" ;
}

template <class T>
void TSubLattice<T>::getWallForce()
{
  console.XDebug() << "TSubLattice<T>::getWallForce: enter\n" ;
  CVarMPIBuffer param_buffer(m_comm);
  Vec3 force;

  // receive params from master
  param_buffer.receiveBroadcast(0);

  std::string wname=param_buffer.pop_string();
  console.XDebug() << "Wall name: " << wname << "\n";

  // find wall
  map<string,CWall*>::iterator iter=m_walls.find(wname);
  if(iter!=m_walls.end()){
    force=(iter->second)->getForce();
    console.XDebug() << "Wall force: " << force << "\n";
  } else {
    force=Vec3(0.0,0.0,0.0);
  }

  vector<Vec3> vforce;
  vforce.push_back(force);
  m_tml_comm.send_gather(vforce,0);
  console.XDebug() << "TSubLattice<T>::getWallForce: exit\n" ;
}

template <class T>
void TSubLattice<T>::addViscWIG()
{
  console.XDebug() << "TSubLattice<T>::addViscWIG: enter\n" ;
  CVarMPIBuffer param_buffer(m_comm);

  // receive params from master
  param_buffer.receiveBroadcast(0);

  CVWallIGP* wigp=extractVWallIGP(&param_buffer);

  string wallname=wigp->getWallName();
  map<string,CWall*>::iterator iter=m_walls.find(wallname);
  if(iter!=m_walls.end()){
    AWallInteractionGroup<T>* newCVWIG=new CViscWallIG<T>(&m_tml_worker_comm,m_walls[wallname],wigp);
    newCVWIG->Update(m_ppa);
    m_WIG.insert(make_pair(wigp->getName(),newCVWIG));
  } else {
    console.Error() << "wall name " << wallname << " not found in map of walls\n";
  }

  delete wigp;
  console.XDebug() << "TSubLattice<T>::addViscWIG: exit\n" ;  
}

template <class T>
void TSubLattice<T>::addPairIG()
{
  console.XDebug()  << "TSubLattice<T>::addPairIG()\n";
  CVarMPIBuffer param_buffer(m_comm,2000);

  // get params
  param_buffer.receiveBroadcast(0);
  string type = param_buffer.pop_string();
  console.XDebug()<< "PIG type: " << type.c_str() << "\n";
  string name = param_buffer.pop_string();
  console.XDebug()<< "PIG name: " << name.c_str() << "\n";
  
  doAddPIG(name,type,param_buffer,false);

  console.XDebug()  << "end TSubLattice<T>::addPairIG()\n";
}

template <class T>
void TSubLattice<T>::addTaggedPairIG()
{
  console.XDebug()  << "TSubLattice<T>::addTaggedPairIG()\n";
  CVarMPIBuffer param_buffer(m_comm,2000);

  // get params
  param_buffer.receiveBroadcast(0);
  string type = param_buffer.pop_string();
  console.XDebug()<< "PIG type: " << type.c_str() << "\n";
  string name = param_buffer.pop_string();
  console.XDebug()<< "PIG name: " << name.c_str() << "\n";

  doAddPIG(name,type,param_buffer,true);

  console.XDebug()  << "end TSubLattice<T>::addTaggedPairIG()\n";
}

template <class T>
bool TSubLattice<T>::doAddPIG(const string& name,const string& type,CVarMPIBuffer& param_buffer, bool tagged)
{
  bool res=false;
  AParallelInteractionStorage* new_pis = NULL;

  if(type=="Elastic") {
    CElasticIGP eigp;
    eigp.m_k=param_buffer.pop_double();
    eigp.m_scaling=static_cast<bool>(param_buffer.pop_int());
    if(tagged){
      int tag1=param_buffer.pop_int();
      int mask1=param_buffer.pop_int();
      int tag2=param_buffer.pop_int();
      int mask2=param_buffer.pop_int();
      console.XDebug() << "tag1, mask1, tag2, mask2 " 
                       << tag1 << " , " << mask1 << " , " 
                       << tag2 << " , " << mask2 << "\n";  
      new_pis=new ParallelInteractionStorage_NE_T<T,CElasticInteraction>(m_ppa,eigp,tag1,mask1,tag2,mask2);
    }else{
      new_pis=new ParallelInteractionStorage_NE<T,CElasticInteraction>(m_ppa,eigp);
    }
    res=true;
  } else if (type=="Friction") {
    CFrictionIGP figp;
    figp.k=param_buffer.pop_double();
    figp.mu=param_buffer.pop_double();
    figp.k_s=param_buffer.pop_double();
    figp.dt=param_buffer.pop_double();
    figp.m_scaling=static_cast<bool>(param_buffer.pop_int());
    console.XDebug() << "k,mu,k_s,dt: " << figp.k << " , " << figp.mu << " , "
    << figp.k_s << " , " << figp.dt << "\n";
    new_pis=new ParallelInteractionStorage_ED<T,CFrictionInteraction>(m_ppa,figp);
    res=true;
  } else if (type=="AdhesiveFriction") {
    CAdhesiveFrictionIGP figp;
    figp.k=param_buffer.pop_double();
    figp.mu=param_buffer.pop_double();
    figp.k_s=param_buffer.pop_double();
    figp.dt=param_buffer.pop_double();
    figp.r_cut=param_buffer.pop_double();
    console.XDebug()
      << "k,mu,k_s,dt,r_cut: " << figp.k << " , " << figp.mu << " , "
      << figp.k_s << " , " << figp.dt << " " << figp.r_cut << "\n";
    new_pis=new ParallelInteractionStorage_ED<T,CAdhesiveFriction>(m_ppa,figp);
    res=true;
  } else if (type=="FractalFriction") {
    FractalFrictionIGP figp;
    figp.k=param_buffer.pop_double();
    figp.mu_0=param_buffer.pop_double();
    figp.k_s=param_buffer.pop_double();
    figp.dt=param_buffer.pop_double();
    console.XDebug() << "k,mu_0,k_s,dt: " << figp.k << " , " << figp.mu_0 << " , "
                     << figp.k_s << " , " << figp.dt << "\n";
    figp.x0=param_buffer.pop_double();
    figp.y0=param_buffer.pop_double();
    figp.dx=param_buffer.pop_double();
    figp.dy=param_buffer.pop_double();
    figp.nx=param_buffer.pop_int();
    figp.ny=param_buffer.pop_int();
    console.XDebug() 
      <<"x0,y0,dx,dy,nx,ny: "
      << figp.x0 << " , " << figp.y0 << " , "
      << figp.dx << " , " << figp.dy << " ,"
      << figp.nx << " , " << figp.ny << "\n";
    figp.mu = boost::shared_ptr<double>(new double[figp.nx*figp.ny]);
  
    for(int i=0;i<figp.nx*figp.ny;i++)
    {
      (figp.mu.get())[i]=param_buffer.pop_double();
      // console.XDebug() << i << " , " << figp.mu[i] << "\n";
    }
    new_pis = new ParallelInteractionStorage_ED<T,CFractalFriction>(m_ppa,figp);
    res=true;
 } else if(type=="VWFriction") {
    VWFrictionIGP figp;
  
    figp.k=param_buffer.pop_double();
    figp.mu=param_buffer.pop_double();
    figp.k_s=param_buffer.pop_double();
    figp.dt=param_buffer.pop_double();
    figp.m_alpha=param_buffer.pop_double();
    console.XDebug()
      << "k,mu,k_s,dt,alpha: " << figp.k << " , " << figp.mu << " , "
      << figp.k_s << " , " << figp.dt << "\n";
    new_pis=new ParallelInteractionStorage_ED<T,CVWFriction>(m_ppa,figp);
    res=true;
  }  else if(type=="RotElastic"){
    CRotElasticIGP reigp;
    reigp.m_kr=param_buffer.pop_double();
    new_pis=new ParallelInteractionStorage_NE<CRotParticle,CRotElasticInteraction>(m_ppa,reigp);
    res=true;
  } else if (type=="RotFriction"){
    CRotFrictionIGP rfigp;
    rfigp.k=param_buffer.pop_double();
    rfigp.mu_s=param_buffer.pop_double();
    rfigp.mu_d=param_buffer.pop_double();    
    rfigp.k_s=param_buffer.pop_double();
    rfigp.dt=param_buffer.pop_double();
    rfigp.scaling=static_cast<bool>(param_buffer.pop_int());
    rfigp.meanR_scaling=static_cast<bool>(param_buffer.pop_int());
    console.XDebug()
      << "k,mu_s,mu_d,k_s,dt,scaling: " << rfigp.k << " , "
      << rfigp.mu_s << " , " << rfigp.mu_d << " , "
      << rfigp.k_s << " , " << rfigp.dt << " , " << rfigp.scaling << "\n";
    if(tagged){
      int tag1=param_buffer.pop_int();
      int mask1=param_buffer.pop_int();
      int tag2=param_buffer.pop_int();
      int mask2=param_buffer.pop_int();
      console.XDebug() << "tag1, mask1, tag2, mask2 " 
        << tag1 << " , " << mask1 << " , " 
        << tag2 << " , " << mask2 << "\n";  
      new_pis=new ParallelInteractionStorage_ED_T<CRotParticle,CRotFrictionInteraction>(m_ppa,rfigp,tag1,mask1,tag2,mask2);
    } else {
      new_pis=new ParallelInteractionStorage_ED<CRotParticle,CRotFrictionInteraction>(m_ppa,rfigp);
    }
    res=true;
  } else if (type == "RotThermElastic") {
    CRotThermElasticIGP eigp;
    eigp.m_kr        = param_buffer.pop_double();
    eigp.diffusivity = param_buffer.pop_double();
    console.XDebug()
      << "k=" << eigp.m_kr << " , "
      << "diffusivity=" << eigp.diffusivity << "\n";

    new_pis = 
      new ParallelInteractionStorage_NE<
        CRotThermParticle,
        CRotThermElasticInteraction
    >(
      m_ppa,
      eigp
    );
    res=true;
  } else if (type == "RotThermFriction") {
    CRotThermFrictionIGP rfigp;
    rfigp.k=param_buffer.pop_double();
    rfigp.mu_s=param_buffer.pop_double();
    rfigp.mu_d=param_buffer.pop_double();    
    rfigp.k_s=param_buffer.pop_double();
    rfigp.diffusivity=param_buffer.pop_double();
    rfigp.dt=param_buffer.pop_double();
    console.XDebug()
      << "k=" << rfigp.k << " , "
      << "mu_d=" << rfigp.mu_d << " , "
      << "mu_s=" << rfigp.mu_s << " , "
      << "k_s=" << rfigp.k_s << " , "
      << "diffusivity=" << rfigp.diffusivity << " , "
      << "dt=" << rfigp.dt << "\n";

    new_pis = 
      new ParallelInteractionStorage_ED<
        CRotThermParticle,
        CRotThermFrictionInteraction
    >(
      m_ppa,
      rfigp
    );
    res=true;
 } else if(type=="HertzianElastic") {
    CHertzianElasticIGP heigp;
    heigp.m_E=param_buffer.pop_double();
    heigp.m_nu=param_buffer.pop_double();
    if(tagged){
      int tag1=param_buffer.pop_int();
      int mask1=param_buffer.pop_int();
      int tag2=param_buffer.pop_int();
      int mask2=param_buffer.pop_int();
      new_pis=new ParallelInteractionStorage_NE_T<T,CHertzianElasticInteraction>(m_ppa,heigp,tag1,mask1,tag2,mask2);
    }else{
      new_pis=new ParallelInteractionStorage_NE<T,CHertzianElasticInteraction>(m_ppa,heigp);
    }
    res=true;
  } else if(type=="HertzianViscoElasticFriction") {
    CHertzianViscoElasticFrictionIGP hvefigp;
    hvefigp.m_A=param_buffer.pop_double();
    hvefigp.m_E=param_buffer.pop_double();
    hvefigp.m_nu=param_buffer.pop_double();
    hvefigp.mu=param_buffer.pop_double();
    hvefigp.k_s=param_buffer.pop_double();
    hvefigp.dt=param_buffer.pop_double();
    if(tagged){
      int tag1=param_buffer.pop_int();
      int mask1=param_buffer.pop_int();
      int tag2=param_buffer.pop_int();
      int mask2=param_buffer.pop_int();
      new_pis=new ParallelInteractionStorage_NE_T<T,CHertzianViscoElasticFrictionInteraction>(m_ppa,hvefigp,tag1,mask1,tag2,mask2);
    }else{
      new_pis=new ParallelInteractionStorage_NE<T,CHertzianViscoElasticFrictionInteraction>(m_ppa,hvefigp);
    }
    res=true;
  } else if(type=="HertzianViscoElastic") {
    CHertzianViscoElasticIGP hveigp;
    hveigp.m_A=param_buffer.pop_double();
    hveigp.m_E=param_buffer.pop_double();
    hveigp.m_nu=param_buffer.pop_double();
    if(tagged){
      int tag1=param_buffer.pop_int();
      int mask1=param_buffer.pop_int();
      int tag2=param_buffer.pop_int();
      int mask2=param_buffer.pop_int();
      new_pis=new ParallelInteractionStorage_NE_T<T,CHertzianViscoElasticInteraction>(m_ppa,hveigp,tag1,mask1,tag2,mask2);
    }else{
      new_pis=new ParallelInteractionStorage_NE<T,CHertzianViscoElasticInteraction>(m_ppa,hveigp);
    }
    res=true;
  } else if(type=="LinearDashpot") {
    CLinearDashpotIGP heigp;
    heigp.m_damp=param_buffer.pop_double();
    heigp.m_cutoff=param_buffer.pop_double();
    if(tagged){
      int tag1=param_buffer.pop_int();
      int mask1=param_buffer.pop_int();
      int tag2=param_buffer.pop_int();
      int mask2=param_buffer.pop_int();
      new_pis=new ParallelInteractionStorage_NE_T<T,CLinearDashpotInteraction>(m_ppa,heigp,tag1,mask1,tag2,mask2);
    }else{
      new_pis=new ParallelInteractionStorage_NE<T,CLinearDashpotInteraction>(m_ppa,heigp);
    }
    res=true;
  } else {
    cerr  << "Unknown interaction group name "
          << type
          << " in TSubLattice<T>::addPairIG()" << endl;
  }

  // add InteractionGroup to map
  if(res) m_dpis.insert(make_pair(name,new_pis));

  return res;
}


template <class T>
void TSubLattice<T>::addTriMesh()
{
  console.XDebug()  << "TSubLattice<T>::addTriMesh()\n";

  // MPI buffer
  CVarMPIBuffer param_buffer(m_comm);
  // data buffers
  vector<MeshNodeData> node_recv_buffer;
  vector<MeshTriData> tri_recv_buffer;

  // receive params
  param_buffer.receiveBroadcast(0);

  // extract name 
  string name = param_buffer.pop_string();
  console.XDebug()<< "TriMesh name: " << name.c_str() << "\n";

  // receive nodes
  m_tml_comm.recv_broadcast_cont_packed(node_recv_buffer,0);
  console.XDebug() << "recvd " << node_recv_buffer.size() << " nodes \n";

  // receive triangles
  m_tml_comm.recv_broadcast_cont_packed(tri_recv_buffer,0);
  console.XDebug() << "recvd " << tri_recv_buffer.size() << " triangles \n";

  // load mesh into new TriMesh
  TriMesh* new_tm=new TriMesh(); 
  new_tm->LoadMesh(node_recv_buffer,tri_recv_buffer);

  m_mesh.insert(make_pair(name,new_tm));  

  console.XDebug()  << "end TSubLattice<T>::addTriMesh()\n";
}

template <class T>
void TSubLattice<T>::addTriMeshIG()
{
  console.XDebug()  << "TSubLattice<T>::addTriMeshIG()\n";

  // MPI buffer
  CVarMPIBuffer param_buffer(m_comm);

  // receive params
  param_buffer.receiveBroadcast(0);

  // extract name & type
  string type = param_buffer.pop_string();
  console.XDebug()<< "TriMeshIG type: " << type.c_str() << "\n";
  string name = param_buffer.pop_string();
  console.XDebug()<< "TriMeshIG name: " << name.c_str() << "\n";
  string meshname = param_buffer.pop_string();
  console.XDebug()<< "TriMeshIG mesh name: " << meshname.c_str() << "\n";

  // get pointer to mesh
  TriMesh* tmp=NULL;
  if (m_mesh.find(meshname) != m_mesh.end())
  {
    tmp = m_mesh[meshname];
  }
  if(tmp==NULL){
    throw runtime_error("unknown mesh name in TSubLattice<T>::addTriMeshIG:" + meshname);
  }
  // switch on type,extract params & construc new TriMeshIG
  if(type=="Elastic")
  {
    AParallelInteractionStorage* new_pis;
    ETriMeshIP tmi;
    tmi.k=param_buffer.pop_double();
    new_pis = new TriMesh_PIS_NE<T,ETriMeshInteraction>(tmp,m_ppa,tmi);
    m_dpis.insert(make_pair(name,new_pis));
  } else { // unknown type-> throw
    throw runtime_error("unknown type in TSubLattice<T>::addTriMeshIG:" + type);
  }

  
  console.XDebug()  << "end TSubLattice<T>::addTriMeshIG()\n";
}

template <class T>
void TSubLattice<T>::addBondedTriMeshIG()
{
  console.XDebug()  << "TSubLattice<T>::addBondedTriMeshIG()\n";

  // MPI buffer
  CVarMPIBuffer param_buffer(m_comm);

  // receive params
  BTriMeshIP param;
  param_buffer.receiveBroadcast(0);

  // extract name.meshname & params
  string name = param_buffer.pop_string();
  console.XDebug()<< "BTriMeshIG name: " << name.c_str() << "\n";
  string meshname = param_buffer.pop_string();
  console.XDebug()<< "BTriMeshIG mesh name: " << meshname.c_str() << "\n";
  param.k = param_buffer.pop_double();
  console.XDebug()<< "BTriMeshIG k : " << param.k << "\n";
  param.brk = param_buffer.pop_double();
  console.XDebug()<< "BTriMeshIG r_break: " << param.brk << "\n";
  string buildtype = param_buffer.pop_string();
  console.XDebug()<< "BTriMeshIG build type: " << buildtype.c_str() << "\n";
  
  // get pointer to mesh
  TriMesh* tmp=NULL;
  if (m_mesh.find(meshname) != m_mesh.end())
  {
    tmp = m_mesh[meshname];
  }
  if(tmp==NULL){
    throw runtime_error("unknown mesh name in TSubLattice<T>::addTriMeshIG:" + meshname);
  }
  
  // setup new interaction storage
  TriMesh_PIS_EB<T,BTriMeshInteraction>* new_pis=new TriMesh_PIS_EB<T,BTriMeshInteraction>(tmp,m_ppa,param);
  // switch on buildtype, extract buildparam & build
  if(buildtype=="BuildByTag"){
    int tag=param_buffer.pop_int();
    int mask=param_buffer.pop_int();
    new_pis->buildFromPPATagged(tag,mask);
    m_bpis.insert(make_pair(name,new_pis));
  } else if(buildtype=="BuildByGap"){
    double max_gap=param_buffer.pop_double();
    new_pis->buildFromPPAByGap(max_gap);
    m_bpis.insert(make_pair(name,new_pis));
  } else { // unknown type-> throw
    throw runtime_error("unknown build type in TSubLattice<T>::addBondedTriMeshIG:" + buildtype);
  }

  console.XDebug()  << "end TSubLattice<T>::addBondedTriMeshIG()\n";
}

template <class T>
void TSubLattice<T>::addMesh2D()
{
  console.XDebug()  << "TSubLattice<T>::addMesh2D()\n";
  
  // MPI buffer
  CVarMPIBuffer param_buffer(m_comm);
  // data buffers
  vector<MeshNodeData2D> node_recv_buffer;
  vector<MeshEdgeData2D> edge_recv_buffer;

  // receive params
  param_buffer.receiveBroadcast(0);

  // extract name 
  string name = param_buffer.pop_string();
  console.XDebug()<< "Mesh2D name: " << name.c_str() << "\n";

  // receive nodes
  m_tml_comm.recv_broadcast_cont_packed(node_recv_buffer,0);
  console.XDebug() << "recvd " << node_recv_buffer.size() << " nodes \n";

  // receive edges
  m_tml_comm.recv_broadcast_cont_packed(edge_recv_buffer,0);
  console.XDebug() << "recvd " << edge_recv_buffer.size() << " edges \n";

  // load mesh into new 2D Mesh
  Mesh2D* new_tm=new Mesh2D(); 
  new_tm->LoadMesh(node_recv_buffer,edge_recv_buffer);

  m_mesh2d.insert(make_pair(name,new_tm));  

  console.XDebug()  << "end TSubLattice<T>::addMesh2D()\n";
}

template <class T>
void TSubLattice<T>::addMesh2DIG()
{
console.XDebug()  << "TSubLattice<T>::addMesh2DIG()\n";

  // MPI buffer
  CVarMPIBuffer param_buffer(m_comm);

  // receive params
  param_buffer.receiveBroadcast(0);

  // extract name & type
  string type = param_buffer.pop_string();
  console.XDebug()<< "Mesh2DIG type: " << type.c_str() << "\n";
  string name = param_buffer.pop_string();
  console.XDebug()<< "Mesh2DIG name: " << name.c_str() << "\n";
  string meshname = param_buffer.pop_string();
  console.XDebug()<< "Mesh2DIG mesh name: " << meshname.c_str() << "\n";

  // get pointer to mesh
  Mesh2D* tmp=NULL;
  if (m_mesh2d.find(meshname) != m_mesh2d.end())
  {
    tmp = m_mesh2d[meshname];
  }
  if(tmp==NULL){
    throw runtime_error("unknown mesh name in TSubLattice<T>::addMesh2DIG:" + meshname);
  }
  // switch on type,extract params & construc new Mesh2DIG
  if(type=="Elastic")
  {
    AParallelInteractionStorage* new_pis;
    ETriMeshIP tmi;
    tmi.k=param_buffer.pop_double();
    new_pis = new Mesh2D_PIS_NE<T,EMesh2DInteraction>(tmp,m_ppa,tmi);
    m_dpis.insert(make_pair(name,new_pis));
  } else { // unknown type-> throw
    throw runtime_error("unknown type in TSubLattice<T>::addMesh2DIG:" + type);
  }

  
  console.XDebug()  << "end TSubLattice<T>::addTriMeshIG()\n";
}

template <class T>
void TSubLattice<T>::addBondedMesh2DIG()
{
  console.XDebug()  << "TSubLattice<T>::addBondedMesh2DIG()\n";
  
  // MPI buffer
  CVarMPIBuffer param_buffer(m_comm);

  // receive params
  BMesh2DIP param;
  param_buffer.receiveBroadcast(0);

  // extract name.meshname & params
  string name = param_buffer.pop_string();
  console.XDebug() << "BMesh2DIG name: " << name.c_str() << "\n";
  string meshname = param_buffer.pop_string();
  console.XDebug() << "BMesh2DIG mesh name: " << meshname.c_str() << "\n";
  param.k = param_buffer.pop_double();
  console.XDebug() << "BMesh2DIG k : " << param.k << "\n";
  param.brk = param_buffer.pop_double();
  console.XDebug() << "BMesh2DIG r_break: " << param.brk << "\n";
  string buildtype = param_buffer.pop_string();
  console.XDebug() << "BMesh2DIG build type: " << buildtype.c_str() << "\n";
  
  // get pointer to mesh
  Mesh2D* tmp=NULL;
  if (m_mesh2d.find(meshname) != m_mesh2d.end())
  {
    tmp = m_mesh2d[meshname];
  }
  if(tmp==NULL){
    throw runtime_error("unknown mesh name in TSubLattice<T>::addBondedMesh2DIG:" + meshname);
  }
  
  // setup new interaction storage
  Mesh2D_PIS_EB<T,BMesh2DInteraction>* new_pis=new Mesh2D_PIS_EB<T,BMesh2DInteraction>(tmp,m_ppa,param);
  // switch on buildtype, extract buildparam & build
  if(buildtype=="BuildByTag"){
    int tag=param_buffer.pop_int();
    int mask=param_buffer.pop_int();
    new_pis->buildFromPPATagged(tag,mask);
    m_bpis.insert(make_pair(name,new_pis));
  } else if(buildtype=="BuildByGap"){
    double max_gap=param_buffer.pop_double();
    new_pis->buildFromPPAByGap(max_gap);
    m_bpis.insert(make_pair(name,new_pis));
  } else { // unknown type-> throw
    throw runtime_error("unknown build type in TSubLattice<T>::addBondedMesh2DIG:" + buildtype);
  }

  console.XDebug() << "end TSubLattice<T>::addBonded2DMeshIG()\n";
}


template <class T>
void TSubLattice<T>::addSingleIG()
{
  console.XDebug()  << "TSubLattice<T>::addSingleIG()\n";
  CVarMPIBuffer param_buffer(m_comm);

  // get params
  param_buffer.receiveBroadcast(0);

  string type = param_buffer.pop_string();
  console.XDebug()<< "SIG type: " << type.c_str() << "\n";

  // setup InteractionGroup
  if(type=="Gravity"){
    esys::lsm::BodyForceIGP prms = esys::lsm::BodyForceIGP::extract(&param_buffer);

    // add to map
    m_singleParticleInteractions.insert(
      std::pair<string,AInteractionGroup<T>*>(
        prms.Name(),
        new esys::lsm::BodyForceGroup<T>(prms, *m_ppa)
      )
    );
  }
  else if (type=="Buoyancy"){
    esys::lsm::BuoyancyIGP prms = esys::lsm::BuoyancyIGP::extract(&param_buffer);

    // add to map
    m_singleParticleInteractions.insert(
      std::pair<string,AInteractionGroup<T>*>(
        prms.Name(),
        new esys::lsm::BuoyancyForceGroup<T>(prms, *m_ppa)
      )
    );
  }
  else {
    throw std::runtime_error(
      std::string("Trying to setup SIG of unknown type: ")
      +
      type
    );
  }

  console.XDebug()  << "end TSubLattice<T>::addSingleIG()\n";
}


template <class T>
void TSubLattice<T>::addDamping()
{
  console.XDebug()  << "TSubLattice<T>::addDamping()\n";
  CVarMPIBuffer param_buffer(m_comm);
  // get params
  param_buffer.receiveBroadcast(0);

  string type = param_buffer.pop_string();
  console.XDebug()<< "Damping type: " << type.c_str() << "\n";

  // setup InteractionGroup
  doAddDamping(type,param_buffer);

  console.XDebug()  << "end TSubLattice<T>::addDamping()\n";
}

template <class T>
bool TSubLattice<T>::doAddDamping(const string& type,CVarMPIBuffer& param_buffer)
{
  AParallelInteractionStorage* DG;
  string damping_name;
  bool res;

  if(type=="Damping")
  {
    CDampingIGP *params=extractDampingIGP(&param_buffer);
    DG=new ParallelInteractionStorage_Single<T,CDamping<T> >(m_ppa,*params);
    damping_name="Damping";
    res=true;
  } else if (type=="ABCDamping"){
    ABCDampingIGP *params=extractABCDampingIGP(&param_buffer);
    DG=new ParallelInteractionStorage_Single<T,ABCDamping<T> >(m_ppa,*params);
    damping_name=params->getName();
    res=true;
  } else if (type=="LocalDamping"){
    CLocalDampingIGP *params=extractLocalDampingIGP(&param_buffer);
    DG=new ParallelInteractionStorage_Single<T,CLocalDamping<T> >(m_ppa,*params);
    damping_name=params->getName();
    res=true;
  }else {
    std::stringstream msg;
    msg << "Trying to setup Damping of unknown type: " << type;
    console.Error() << msg.str() << "\n";
    throw std::runtime_error(msg.str());
    res=false;
  }

  // add to map
  if(res) {
    m_damping.insert(make_pair(damping_name,DG));
    m_damping[damping_name]->update();
  }
  return res;
}

template <class T>
void TSubLattice<T>::addBondedIG()
{
  console.XDebug()  << "TSubLattice<T>::addBondedIG()\n";
  CVarMPIBuffer param_buffer(m_comm);

  // get params
  CBondedIGP param;
  param_buffer.receiveBroadcast(0);
  param.tag=param_buffer.pop_int();
  string name = param_buffer.pop_string();
  param.k=param_buffer.pop_double();
  param.rbreak=param_buffer.pop_double();
  param.m_scaling=static_cast<bool>(param_buffer.pop_int());

  console.XDebug()
    << "Got BondedIG parameters: " << param.tag
    << " " << name.c_str() << " "
    << param.k << " " << param.rbreak << "\n";
  // setup InteractionGroup
  ParallelInteractionStorage_EB<T,CBondedInteraction> *B_PIS = 
    new ParallelInteractionStorage_EB<T,CBondedInteraction>(m_ppa,param);

  // set unbreakable if rbeak<0
  if(param.rbreak<0){
    B_PIS->setUnbreakable(true);
    console.XDebug() << "set bpis unbreakable\"n";
  } 

  vector<int> vi(2,-1);
  for(size_t i=0;i<m_temp_conn[param.tag].size();i+=2)
  {
    vi[0] = (m_temp_conn[param.tag][i]);
    vi[1] = (m_temp_conn[param.tag][i+1]);
    B_PIS->tryInsert(vi);
  }

  // add InteractionGroup to map
  m_bpis.insert(make_pair(name,B_PIS));

  console.XDebug()  << "end TSubLattice<T>::addBondedIG()\n";
}

template <class T>
void TSubLattice<T>::addCappedBondedIG()
{
  console.XDebug()  << "TSubLattice<T>::addCappedBondedIG()\n";
  CVarMPIBuffer param_buffer(m_comm);

  // get params
  param_buffer.receiveBroadcast(0);
  int tag=param_buffer.pop_int();
  string name = param_buffer.pop_string();
  double k=param_buffer.pop_double();
  double rbreak=param_buffer.pop_double();
  double maxforce=param_buffer.pop_double();

  console.XDebug()
    << "Got CappedBondedIG parameters: " << tag
    << " " << name.c_str() << " "
    << k << " " << rbreak << " " << maxforce << "\n";
  // setup InteractionGroup
  CCappedBondedIGP param;
  param.k=k;
  param.rbreak=rbreak;
  param.tag = tag;
  param.m_force_limit=maxforce;
  ParallelInteractionStorage_EB<T,CCappedBondedInteraction> *B_PIS = 
    new ParallelInteractionStorage_EB<T,CCappedBondedInteraction>(m_ppa,param);

  // set unbreakable if rbeak<0
  if(rbreak<0){
    B_PIS->setUnbreakable(true);
    console.XDebug() << "set bpis unbreakable\"n";
  } 
  // recv broadcast connection data
  /*console.XDebug()
    << "rank=" << m_tml_comm.rank()
    << "TSubLattice<T>::addCappedBondedIG(): receiving conn_data.\n";

  vector<int> conn_data;
  m_tml_comm.recv_broadcast_cont(conn_data,0);
  console.XDebug() 
    << "rank=" << m_tml_comm.rank()
    << "TSubLattice<T>::addBondedIG(): conn_data.size()="
    << conn_data.size() << "\n";
  */
  vector<int> vi(2,-1);
  for(size_t i=0;i<m_temp_conn[tag].size();i+=2)
  {
    vi[0] = (m_temp_conn[tag][i]);
    vi[1] = (m_temp_conn[tag][i+1]);
    B_PIS->tryInsert(vi);
  }

  // add InteractionGroup to map
  m_bpis.insert(make_pair(name,B_PIS));

  console.XDebug()  << "end TSubLattice<T>::addCappedBondedIG()\n";
}

template <class T>
void TSubLattice<T>::addRotBondedIG()
{
  console.Error()  << "TSubLattice<T>::addRotBondedIG() => trying to add rotational bonded IG to nonrotational model\n";
}

template <class T>
void TSubLattice<T>::addRotThermBondedIG()
{
  console.Error()  << "TSubLattice<T>::addRotThermBondedIG() => trying to add rotational thermal bonded IG to nonrotational model\n";
}

template <class T>
void TSubLattice<T>::addShortBondedIG()
{
  console.XDebug()  << "TSubLattice<T>::addShortBondedIG()\n";
  CVarMPIBuffer param_buffer(m_comm);

  // get params
  param_buffer.receiveBroadcast(0);
  int tag=param_buffer.pop_int();
  string name = param_buffer.pop_string();
  double k=param_buffer.pop_double();
  double rbreak=param_buffer.pop_double();

  console.XDebug()
    << "Got ShortBondedIG parameters: " << tag
    << " " << name.c_str() << " "
    << k << " " << rbreak << "\n";
  // setup InteractionGroup
  CBondedIGP param;
  param.k=k;
  param.rbreak=rbreak;
  param.tag = tag;
  ParallelInteractionStorage_EB<T,CShortBondedInteraction> *B_PIS = 
    new ParallelInteractionStorage_EB<T,CShortBondedInteraction>(m_ppa,param);

  // recv broadcast connection data
  /*console.XDebug()
    << "rank=" << m_tml_comm.rank()
    << "TSubLattice<T>::addShortBondedIG(): receiving conn_data.\n";

  vector<int> conn_data;
  m_tml_comm.recv_broadcast_cont(conn_data,0);
  console.XDebug() 
    << "rank=" << m_tml_comm.rank()
    << "TSubLattice<T>::addShortBondedIG(): conn_data.size()="
    << conn_data.size() << "\n";*/

  vector<int> vi(2,-1);
  for(size_t i=0;i<m_temp_conn[param.tag].size();i+=2)
  {
    vi[0] = (m_temp_conn[param.tag][i]);
    vi[1] = (m_temp_conn[param.tag][i+1]);
    B_PIS->tryInsert(vi);
  }

  // add InteractionGroup to map
  m_bpis.insert(make_pair(name,B_PIS));

  console.XDebug()  << "end TSubLattice<T>::addShortBondedIG()\n";
}

template <class T>
void TSubLattice<T>::setExIG()
{
  console.XDebug()  << "TSubLattice<T>::addExIG()\n";
  CVarMPIBuffer pbuffer(m_comm);

  // get params
  pbuffer.receiveBroadcast(0);
  string s1 = pbuffer.pop_string();
  string s2 = pbuffer.pop_string();

  //console.XDebug()<< s1.c_str()  << "  " <<  s2.c_str() << "\n";
  map<string,AParallelInteractionStorage*>::iterator bonded_ig=m_bpis.find(s1);
  map<string,AParallelInteractionStorage*>::iterator dynamic_ig=m_dpis.find(s2);
  if((bonded_ig!=m_bpis.end())&&(dynamic_ig!=m_dpis.end()))
  {
    // map iterators point to [key,value] pairs, therefore it->second 
    // is the pointer to the PIS here 
    dynamic_ig->second->addExIG(bonded_ig->second);
  }
  else
  {
    console.Error() << "TSubLattice<T>::setExIG() - nonexisting interaction group \n";
  }
  
  console.XDebug()  << "end TSubLattice<T>::addExIG()\n";
}

template <class T>
void TSubLattice<T>::removeIG()
{
  console.XDebug()  << "TSubLattice<T>::removeIG()\n";
  CVarMPIBuffer pbuffer(m_comm);
  bool found=false;

  // get params
  pbuffer.receiveBroadcast(0);
  string igname = pbuffer.pop_string();
  // look for name in map of non-bondend particle pair interactions
  map<string,AParallelInteractionStorage*>::iterator iter=m_dpis.find(igname);
  // if found, remove interaction
  if(iter!=m_dpis.end()){
    found=true;
    delete m_dpis[igname];
    m_dpis.erase(iter);
  } else {
    // if not found, look in unbonded wall interactions
    typename map<string,AWallInteractionGroup<T>*>::iterator it2=m_WIG.find(igname);
    if(it2!=m_WIG.end()){
      found=true;
      delete m_WIG[igname];
      m_WIG.erase(it2);
    } 
  } 
    
  if(!found) {
    console.Error() << "TSubLattice<T>::removeIG() - nonexisting interaction group - ignore removal\n";
  }
}


template <class T>
void TSubLattice<T>::exchangePos()
{
  console.XDebug() << "TSubLattice<T>::exchangePos() \n" ;
  
  m_ppa->exchange(&T::getExchangeValues,&T::setExchangeValues);
  
  console.XDebug() << "end TSubLattice<T>::exchangePos()\n" ;
}

template <class T>
void TSubLattice<T>::zeroForces()
{
  console.XDebug() << "TSubLattice<T>::zeroForces()\n";

  // particles
  m_ppa->forAllParticles(&T::zeroForce);
  // trimeshes
  for(map<string,TriMesh*>::iterator iter=m_mesh.begin();
      iter!=m_mesh.end();
      iter++){
    (iter->second)->zeroForces();
  }
  
  // 2d meshes
  for(map<string,Mesh2D*>::iterator iter=m_mesh2d.begin();
      iter!=m_mesh2d.end();
      iter++){
    (iter->second)->zeroForces();
  }
  // walls
  for(typename map<string,CWall*>::iterator iter=m_walls.begin();
      iter!=m_walls.end();
      iter++)
  {
    (iter->second)->zeroForce();
  }
  console.XDebug() << "end TSubLattice<T>::zeroForces() \n";
}

template <class T>
void TSubLattice<T>::calcForces()
{
  console.XDebug() << "TSubLattice<T>::calcForces() \n";
  
  // the walls 
  for(typename map<string,AWallInteractionGroup<T>*>::iterator it=m_WIG.begin();it!=m_WIG.end();it++)
  {
    (it->second)->calcForces();
  }
  // single particle IGs 
  for(
    typename NameIGroupMap::iterator siter=this->m_singleParticleInteractions.begin();
    siter != m_singleParticleInteractions.end();
    siter++
  )
  {
    (siter->second)->calcForces();
  }
  // dynamically created IGs
  for(typename map<string,AParallelInteractionStorage*>::iterator iter=m_dpis.begin();iter!=m_dpis.end();iter++)
  {
    (iter->second)->calcForces();
  }
  // bonded IGs
  for(typename map<string,AParallelInteractionStorage*>::iterator iter=m_bpis.begin();iter!=m_bpis.end();iter++)
  {
    (iter->second)->calcForces();
  }
  // last, but not least - damping
  for(typename map<string,AParallelInteractionStorage*>::iterator iter=m_damping.begin();iter!=m_damping.end();iter++)
  {
    (iter->second)->calcForces();
  }

  console.XDebug() << "end TSubLattice<T>::calcForces() \n";
}

template <class T>
void TSubLattice<T>::setTimeStepSize(double dt)
{
  m_dt = dt;
  console.XDebug() << "TSubLattice<T>::setTimeStepSize() \n";
  
  // the walls 
  for(typename map<string,AWallInteractionGroup<T>*>::iterator it=m_WIG.begin();it!=m_WIG.end();it++)
  {
    (it->second)->setTimeStepSize(dt);
  }
  // single particle IGs 
  for(
    typename NameIGroupMap::iterator siter=this->m_singleParticleInteractions.begin();
    siter != m_singleParticleInteractions.end();
    siter++
  )
  {
    (siter->second)->setTimeStepSize(dt);
  }
  // dynamically created IGs
  for(typename map<string,AParallelInteractionStorage*>::iterator iter=m_dpis.begin();iter!=m_dpis.end();iter++)
  {
    (iter->second)->setTimeStepSize(dt);
  }
  // bonded IGs
  for(typename map<string,AParallelInteractionStorage*>::iterator iter=m_bpis.begin();iter!=m_bpis.end();iter++)
  {
    (iter->second)->setTimeStepSize(dt);
  }
  // last, but not least - damping
  for(typename map<string,AParallelInteractionStorage*>::iterator iter=m_damping.begin();iter!=m_damping.end();iter++)
  {
    (iter->second)->setTimeStepSize(dt);
  }

  console.XDebug() << "end TSubLattice<T>::setTimeStepSize() \n";
}

template <class T>
void TSubLattice<T>::integrate(double dt)
{
  console.XDebug() << "TSubLattice<T>::integrate \n";
  m_ppa->forAllParticles(&T::integrate,dt);
  m_ppa->forAllParticles(&T::rescale) ;        
  console.XDebug() << "end TSubLattice<T>::integrate \n";
}

template <class T>
void TSubLattice<T>::oneStep()
{
  zeroForces();
  calcForces();
  integrate(m_dt);

  if (this->getParticleType() == "RotTherm")
  {
    this->oneStepTherm();
  }
}

template <class T>
void TSubLattice<T>::oneStepTherm()
{
  zeroHeat();            // ???? combine?
  calcHeatFrict();
  calcHeatTrans();
  integrateTherm(m_dt);
  thermExpansion() ;
}

template <class T>
void TSubLattice<T>::integrateTherm(double dt)
{
  console.XDebug() << "TSubLattice<T>::integrateTherm \n";
  m_ppa->forAllParticles(&T::integrateTherm,dt);
//  m_ppa->forAllParticles(&T::rescale) ;
  console.XDebug() << "end TSubLattice<T>::integrateTherm \n";
}

template <class T>
void TSubLattice<T>::thermExpansion()
{
  console.XDebug() << "TSubLattice<T>::thermExpansion() \n";
  m_ppa->forAllParticles(&T::thermExpansion);
//  m_ppa->forAllParticles(&T::rescale) ;
  console.XDebug() << "end TSubLattice<T>::thermExpansion() \n";
}

template <class T>
void TSubLattice<T>::zeroHeat()
{
  console.XDebug() << "TSubLattice<T>::zeroHeat()\n";

  // particles
  m_ppa->forAllParticles(&T::zeroHeat);

/*
// walls
  for(typename vector<AWallInteractionGroup<T>*>::iterator iter=m_WIG.begin();iter!=m_WIG.end();iter++)
  {
    (*iter)->zeroForce();
  }
*/
  console.XDebug() << "end TSubLattice<T>::zeroHeat() \n";
}

template <class T>
void TSubLattice<T>::calcHeatFrict()
{
  console.XDebug() << "TSubLattice<T>::calcHeatFrict() \n";

  // dynamically created IGs
  for(
    typename map<string,AParallelInteractionStorage*>::iterator iter=m_dpis.begin();
    iter!=m_dpis.end();
    iter++
  )
  {
    (iter->second)->calcHeatFrict();
  }

  console.XDebug() << "end TSubLattice<T>::calcHeatFrict() \n";
}

template <class T>
void TSubLattice<T>::calcHeatTrans()
{
  console.XDebug() << "TSubLattice<T>::calcHeatTrans() \n";


  // dynamically created IGs
  for(
    typename map<string,AParallelInteractionStorage*>::iterator iter=m_dpis.begin();
    iter!=m_dpis.end();
    iter++
  )
  {
    (iter->second)->calcHeatTrans();
  }
  // bonded IGs
  for(
    typename map<string,AParallelInteractionStorage*>::iterator iter=m_bpis.begin();
    iter!=m_bpis.end();
    iter++
  )
  {
    (iter->second)->calcHeatTrans();
  }

  console.XDebug() << "end TSubLattice<T>::calcHeatTrans() \n";
}

template <class T>
void TSubLattice<T>::rebuildParticleArray()
{
  m_ppa->rebuild();
}

template <class T>
void TSubLattice<T>::rebuildInteractions()
{
  CMPIBarrier barrier(m_worker_comm);
  m_pTimers->start("RebuildInteractions");
  m_pTimers->resume("NeighbourSearch");
  for(typename map<string,AParallelInteractionStorage*>::iterator iter=m_bpis.begin();
          iter!=m_bpis.end();
          iter++)
  {
    console.Debug() << "exchg & rebuild BPIS " << iter->first << " at node " << m_rank << "\n";
    (iter->second)->exchange();  
    (iter->second)->rebuild();
  }

  for(typename map<string,AParallelInteractionStorage*>::iterator iter=m_dpis.begin();
      iter!=m_dpis.end();
      iter++)
  {
    console.Debug() << "exchg & rebuild DPIS " << iter->first << " at node " << m_rank << "\n";
    (iter->second)->exchange();
    m_pTimers->pause("RebuildInteractions");
    m_pTimers->pause("NeighbourSearch");
    barrier.wait("dpis::exchange");
    m_pTimers->resume("RebuildInteractions");
    m_pTimers->resume("NeighbourSearch");
    (iter->second)->rebuild();
  }
  resetDisplacements();
  m_pTimers->stop("RebuildInteractions");
}

template <class T>
void TSubLattice<T>::searchNeighbors()
{
  console.Debug() << "CSubLattice<T>::searchNeighbors()\n";
  CMPIBarrier barrier(getWorkerComm());
  m_pTimers->start("NeighbourSearch");
  m_pTimers->start("RebuildParticleArray");
  rebuildParticleArray();
  m_pTimers->stop("RebuildParticleArray");
  m_pTimers->pause("NeighbourSearch");
  barrier.wait("PPA rebuild");
  rebuildInteractions();
  m_pTimers->stop("NeighbourSearch");
  console.Debug() << "end CSubLattice<T>::searchNeighbors()\n";
}

template <class T>
void TSubLattice<T>::updateInteractions()
{
  console.Debug() << "updateInteractions() \n";
  console.Debug() << "m_ppa->getTimeStamp() " << m_ppa->getTimeStamp() << " m_last_ns " << m_last_ns << "\n";
  bool need_update=false;

  m_pTimers->start("UpdateBondedInteractions");
  for(typename map<string,AParallelInteractionStorage*>::iterator iter=m_bpis.begin();
          iter!=m_bpis.end();
          iter++)
  {
    bool n=(iter->second)->update();
    need_update=need_update || n;
  }
  m_pTimers->stop("UpdateBondedInteractions");
  if((m_ppa->getTimeStamp() > m_last_ns) || need_update)
  {
    m_pTimers->start("UpdateDynamicInteractions");
    for(typename map<string,AParallelInteractionStorage*>::iterator iter=m_dpis.begin();
          iter!=m_dpis.end();
          iter++)
      {
        bool n=(iter->second)->update();
        need_update=need_update || n;
      }
    m_pTimers->stop("UpdateDynamicInteractions");
    for(typename map<string,AWallInteractionGroup<T>*>::iterator it=m_WIG.begin();
        it!=m_WIG.end();
        it++)
      {
        (it->second)->Update(m_ppa);
      }
    for(typename map<string,AParallelInteractionStorage*>::iterator iter=m_damping.begin();
         iter!=m_damping.end();
         iter++){
      (iter->second)->update();
    }
    m_last_ns=m_ppa->getTimeStamp();
  }

  console.Debug() << "end TSubLattice<T>::updateInteractions()\n";
}

template <class T>
void TSubLattice<T>::checkNeighbors()
{
  console.Debug() << "TSubLattice<T>::checkNeighbors()\n";
  CMPISGBufferLeaf buffer(m_comm,0,8);
  double mdsqr=0; // squared max. displacement
  double alpha=0.5*m_alpha;
  double srsqr=alpha*alpha; // squared search range
  vector<Vec3> displ; // displacements
  int res; // result 0/1 

  // --- particles --- 
  // get displacement data 
  m_ppa->forAllParticlesGet(displ,&T::getDisplacement);
  
  // find maximum particle displacement
  vector<Vec3>::iterator it=displ.begin();
  while((it!=displ.end())&&(mdsqr<srsqr))
  {
    double sqdisp=(*it)*(*it);
    mdsqr = ((mdsqr < sqdisp) ? sqdisp : mdsqr);
    it++;
    //console.XDebug() << "sq. disp: " << sqdisp << "\n";
  }
  console.XDebug() << "max squared displacement " << mdsqr << "alpha^2 = " << srsqr << "\n";
  if (mdsqr>srsqr){ 
    res=1;
  } else {
    res=0;
  }

  // --- mesh ---
  // only needed if res==0
  if(res==0){
    for(map<string,TriMesh*>::iterator iter=m_mesh.begin();
        iter!=m_mesh.end();
        iter++){
      //std::cerr << "check mesh " << iter->first << std::endl;
      if(iter->second->hasMovedBy(alpha)){
        res=1;
      }
    }
  }
  buffer.append(res);
  buffer.send();
  console.Debug() << "end TSubLattice<T>::checkNeighbors()\n";
}


template <class T>
void TSubLattice<T>::resetDisplacements()
{
  console.Debug() << "slave " << m_rank << " resetDisplacements()\n";
  m_ppa->forAllParticles(&T::resetDisplacement);
  for(map<string,TriMesh*>::iterator iter=m_mesh.begin();
      iter!=m_mesh.end();
      iter++){
    iter->second->resetCurrentDisplacement();
  }
  console.Debug() << "slave " << m_rank << " end resetDisplacements()\n";
}

template <class T>
void TSubLattice<T>::moveParticleTo()
{
  console.Debug() << "TSubLattice<T>::moveParticleTo()\n";
  CVarMPIBuffer buffer(m_comm);
  
  buffer.receiveBroadcast(0); // get data from master
  int tag=buffer.pop_int();
  Vec3 mv=buffer.pop_vector();
  m_ppa->forParticleTag(tag,(void (T::*)(Vec3))(&T::moveToRel),mv);
  console.Debug() << "end TSubLattice<T>::moveParticleTo()\n";
}

template <class T>
void TSubLattice<T>::moveTaggedParticlesBy()
{
  console.Debug() << "TSubLattice<T>::moveTaggedParticlesBy()\n";
  CVarMPIBuffer buffer(m_comm);
  
  buffer.receiveBroadcast(0); // get data from master
  const int tag = buffer.pop_int();
  const Vec3 dx = buffer.pop_vector();
  m_ppa->forParticleTag(tag, (void (T::*)(Vec3))(&T::moveBy),dx);
  console.Debug() << "end TSubLattice<T>::moveTaggedParticlesBy()\n";
}


template <class T>
void TSubLattice<T>::moveSingleParticleTo(int particleId, const Vec3 &posn)
{
  m_ppa->forParticle(particleId, (void (T::*)(Vec3))(&T::moveTo), posn);
}

template <class T>
void TSubLattice<T>::moveSingleNode()
{
  console.Debug() << "TSubLattice<T>::moveSingleNode()\n";
  CVarMPIBuffer buffer(m_comm);
  
  buffer.receiveBroadcast(0); // get data from master
  string name=string(buffer.pop_string());
  int id=buffer.pop_int();
  Vec3 disp=buffer.pop_vector();

  console.XDebug() << "name :" << name << " id : " << id << " disp " << disp << "\n";
  
  map<string,TriMesh*>::iterator tm=m_mesh.find(name);
  if (tm!=m_mesh.end()){
    (tm->second)->moveNode(id,disp);
  } else {
    map<string,Mesh2D*>::iterator m2d=m_mesh2d.find(name);
    if(m2d!=m_mesh2d.end()){
      (m2d->second)->moveNode(id,disp);
    } 
  }
  console.Debug() << "end TSubLattice<T>::moveSingleNode()\n";
}

template <class T>
void TSubLattice<T>::moveTaggedNodes()
{
  console.Error() << "TSubLattice<T>::moveTaggedNodes() NOT IMPLEMENTED\n";
  throw
    std::runtime_error(
      "TSubLattice<T>::moveTaggedNodes() NOT IMPLEMENTED\n"
    );
#if 0
  CVarMPIBuffer buffer(m_comm);
  
  buffer.receiveBroadcast(0); // get data from master
  string name=string(buffer.pop_string());
  int tag=buffer.pop_int();
  Vec3 disp=buffer.pop_vector();
#endif
}

template <class T>
void TSubLattice<T>::translateMeshBy(const std::string &meshName, const Vec3 &translation)
{
  map<string,TriMesh*>::iterator tm=m_mesh.find(meshName);
  if (tm != m_mesh.end()){
    (tm->second)->translateBy(translation);
  }
  map<string,Mesh2D*>::iterator m2d=m_mesh2d.find(meshName);
  if(m2d!=m_mesh2d.end()){
    (m2d->second)->translateBy(translation);
  }
}

template <class T>
std::pair<double, int> TSubLattice<T>::findParticleNearestTo(const Vec3 &pt)
{
  console.Debug() << "TSubLattice<T>::findParticleNearestTo: enter\n";
  const T *pClosest = NULL;
  double minDistSqrd = std::numeric_limits<double>::max();

  typename ParticleArray::ParticleIterator it =
      m_ppa->getInnerParticleIterator();
  while (it.hasNext())
  {
    const T &p = it.next();
    const double distSqrd = (pt - p.getPos()).norm2();
    if (distSqrd < minDistSqrd)
    {
      minDistSqrd = distSqrd;
      pClosest = &p;
    }
  }
  console.Debug() << "TSubLattice<T>::findParticleNearestTo: exit\n";
  return
    (
      (pClosest != NULL)
      ?
      std::make_pair(sqrt(minDistSqrd), pClosest->getID())
      :
      std::make_pair(std::numeric_limits<double>::max(), -1)
    );
}

template <class T>
std::pair<int, Vec3> TSubLattice<T>::getParticlePosn(int particleId)
{
  const T *particle = NULL;
  typename ParticleArray::ParticleIterator it =
      m_ppa->getInnerParticleIterator();
  while (it.hasNext())
  {
    const T &p = it.next();
    if (p.getID() == particleId)
    {
      particle = &p;
    }
  }
  if (particle != NULL)
  {
    return std::make_pair(particleId, particle->getPos());
  }
  return std::make_pair(-1,Vec3::ZERO);
}

template <class T>
void TSubLattice<T>::getParticleData(const IdVector &particleIdVector)
{
  console.Debug()
    << "TSubLattice<T>::getParticleData: enter\n";
  typedef std::set<int> IdSet;
  typedef std::vector<T> ParticleVector;

  ParticleVector particleVector;
  typename ParticleArray::ParticleIterator it =
      m_ppa->getInnerParticleIterator();
  if (particleIdVector.size() > 0)
  {
    IdSet idSet(particleIdVector.begin(), particleIdVector.end());
    console.Debug()
      << "TSubLattice<T>::getParticleData: iterating over particles\n";
    while (it.hasNext())
    {
      const T &p = it.next();
      if (idSet.find(p.getID()) != idSet.end())
      {
        particleVector.push_back(p);
      }
    }
  }
  else
  {
    m_ppa->getAllInnerParticles(particleVector);
  }
  console.Debug()
    << "TSubLattice<T>::getParticleData:"
    << " sending particle data of size " << particleVector.size() << "\n";
  m_tml_comm.send_gather_packed(particleVector, 0);
  console.Debug()
    << "TSubLattice<T>::getParticleData: exit\n";
}

template <class T>
void TSubLattice<T>::tagParticleNearestTo()
{
  console.Debug() << "TSubLattice<T>::tagParticleNearestTo()\n";
  CVarMPIBuffer buffer(m_comm);
  
  buffer.receiveBroadcast(0); // get data from master
  int tag=buffer.pop_int();
  int mask=buffer.pop_int();
  Vec3 pos=buffer.pop_vector();
  
  // warning - this is ugly
  T* part_ptr=m_ppa->getParticlePtrByPosition(pos);
  if(part_ptr!=NULL){
    int old_tag=part_ptr->getTag();
    int new_tag=(old_tag & (~mask)) | (tag & mask);
    part_ptr->setTag(new_tag);

    cout << "pos, realpos: " << pos << " " << part_ptr->getPos() << " old tag, new tag " << old_tag << " " << part_ptr->getTag() << endl;
  }
  console.Debug() << "end TSubLattice<T>::tagParticleNearestTo()\n";  
}

template <class T>
void TSubLattice<T>::setParticleNonDynamic()
{
  console.Debug() << "TSubLattice<T>::setParticleNonDynamic()\n";
  CVarMPIBuffer buffer(m_comm);
  
  buffer.receiveBroadcast(0); // get data from master
  int tag=buffer.pop_int();
  m_ppa->forParticleTag(tag,(void (T::*)())(&T::setNonDynamic));
  console.Debug() << "end TSubLattice<T>::setParticleNonDynamic()\n";
}

template <class T>
void TSubLattice<T>::setParticleNonRot()
{
  console.Debug() << "TSubLattice<T>::setParticleNonRot()\n";
  CVarMPIBuffer buffer(m_comm);
  
  buffer.receiveBroadcast(0); // get data from master
  int tag=buffer.pop_int();
  m_ppa->forParticleTag(tag,(void (T::*)())(&T::setNonDynamicRot));
  console.Debug() << "end TSubLattice<T>::setParticleNonRot()\n";
}

template <class T>
void TSubLattice<T>::setParticleNonTrans()
{
  console.Debug() << "TSubLattice<T>::setParticleNonTrans()\n";
  CVarMPIBuffer buffer(m_comm);
  
  buffer.receiveBroadcast(0); // get data from master
  int tag=buffer.pop_int();
  m_ppa->forParticleTag(tag,(void (T::*)())(&T::setNonDynamicLinear));
  console.Debug() << "end TSubLattice<T>::setParticleNonTrans()\n";
}

template <class T>
void TSubLattice<T>::setTaggedParticleVel()
{
  console.Debug() << "TSubLattice<T>::setTaggedParticleVel()\n";
  CVarMPIBuffer buffer(m_comm);
 
  buffer.receiveBroadcast(0); // get data from master
  int tag=buffer.pop_int();
  Vec3 v=buffer.pop_vector();
  m_ppa->forParticleTag(tag,(void (T::*)(Vec3))(&T::setVel),v);
  console.XDebug() << "end TSubLattice<T>::setTaggedParticleVel()\n";
}

template <class T>
void TSubLattice<T>::moveWallBy()
{
  console.XDebug() << "TSubLattice<T>::moveWallBy()\n";
  CVarMPIBuffer buffer(m_comm);
  
  buffer.receiveBroadcast(0); // get data from master
  string wname=buffer.pop_string();
  Vec3 mv=buffer.pop_vector();
  typename map<string,CWall*>::iterator iter=m_walls.find(wname);
  if(iter!=m_walls.end())
  {
    (iter->second)->moveBy(mv);
  }
}

template <class T>
void TSubLattice<T>::setWallNormal()
{
  console.XDebug() << "TSubLattice<T>::setWallNormal()\n";
  CVarMPIBuffer buffer(m_comm);

  buffer.receiveBroadcast(0); // get data from master
  string wname=buffer.pop_string();
  Vec3 wn=buffer.pop_vector();
  typename map<string,CWall*>::iterator iter=m_walls.find(wname);
  if(iter!=m_walls.end())
  {
    (iter->second)->setNormal(wn);
  }
}

template <class T>
void TSubLattice<T>::applyForceToWall()
{
  console.XDebug() << "TSubLattice<T>::applyForceToWall()\n";
  CVarMPIBuffer buffer(m_comm);

  buffer.receiveBroadcast(0); // get data from master
  string wname=buffer.pop_string();
  Vec3 f=buffer.pop_vector();
  typename map<string,AWallInteractionGroup<T>*>::iterator iter=m_WIG.find(wname);
  if(iter!=m_WIG.end())
  {
    (iter->second)->applyForce(f);
  }
}

template <class T>
void TSubLattice<T>::setVelocityOfWall()
{
  console.XDebug() << "TSubLattice<T>::setVelocityOfWall()\n";
  CVarMPIBuffer buffer(m_comm);

  buffer.receiveBroadcast(0); // get data from master
  string wname=buffer.pop_string();
  Vec3 v=buffer.pop_vector();
  typename map<string,AWallInteractionGroup<T>*>::iterator iter=m_WIG.find(wname);
  if(iter!=m_WIG.end())
  {
    (iter->second)->setVelocity(v);
  }
}

template <class T>
void TSubLattice<T>::setParticleVelocity()
{
  console.Debug() << "TSubLattice<T>::setParticleVelocity()\n";
  CVarMPIBuffer buffer(m_comm);
  
  buffer.receiveBroadcast(0); // get data from master
  int id=buffer.pop_int();
  Vec3 mv=buffer.pop_vector();
  m_ppa->forParticle(id,(void (T::*)(Vec3))(&T::setVel),mv);
  console.XDebug() << "end TSubLattice<T>::setParticleVelocity()\n";
}

template <class T>
void TSubLattice<T>::setParticleDensity()
{
  console.Debug() << "TSubLattice<T>::setParticleDensity()\n";
  CVarMPIBuffer buffer(m_comm);
  
  buffer.receiveBroadcast(0); // get data from master
  int tag=buffer.pop_int();
  int mask=buffer.pop_int();
  double rho=buffer.pop_double();
  m_ppa->forParticleTagMask(tag,mask,(void (T::*)(double))(&T::setDensity),rho);
  console.XDebug() << "end TSubLattice<T>::setParticleVelocity()\n";
}


template <class T>
void TSubLattice<T>::sendDataToMaster()
{
  console.Debug() << "TSubLattice<T>::sendDataToMaster()\n";
  vector<Vec3> positions;
  vector<double> radii;
  vector<int> ids;
  
  m_ppa->forAllParticlesGet(positions,(Vec3 (T::*)() const)(&T::getPos));
  m_ppa->forAllParticlesGet(radii,(double (T::*)() const)(&T::getRad));
  m_ppa->forAllParticlesGet(ids,(int (T::*)() const)(&T::getID));
  
  m_tml_comm.send_gather(positions,0);
  m_tml_comm.send_gather(radii,0);
  m_tml_comm.send_gather(ids,0);
  
  console.Debug() << "end TSubLattice<T>::sendDataToMaster()\n";
}

template <class T>
void TSubLattice<T>::countParticles()
{
  console.Debug()<<"TSubLattice<T>::countParticles()\n";
  CMPIVarSGBufferLeaf buffer(m_comm,0);
  //-- pack particles into buffer
  buffer.append(m_ppa->size());
  // send
  buffer.send();
}

template <class T>
void TSubLattice<T>::printStruct()
{
  cout<< "My Rank : " << m_rank << "\n" ;
  if(m_ppa!=NULL)
  {
          cout << *m_ppa << endl;
  }
}

template <class T>
void TSubLattice<T>::printData()
{
  cout << "Data: my rank : " << m_rank << "particles : \n" ;
  m_ppa->forAllParticles((void (T::*)())(&T::print));
}

template <class T>
void TSubLattice<T>::printTimes()
{
  console.Debug() << "time spent calculating force : " << forcetime << " sec\n";
  console.Debug() << "time spent communicating     : " << commtime << " sec\n";
  console.Debug() << "time spent packing           : " << packtime << " sec\n";
  console.Debug() << "time spent unpacking         : " << unpacktime << " sec\n";
}

//-------------- FIELD FUNCTIONS ----------------



template <class T>
void TSubLattice<T>::addScalarParticleField()
{
  // cout << "TSubLattice<T>::addScalarParticleField\n";
  string fieldname;
  int id,is_tagged;
  
  m_tml_comm.recv_broadcast_cont(fieldname,0);
  //cout << "recvd. fieldname: " << fieldname << "\n";
  m_tml_comm.recv_broadcast(id,0);
  //cout << "recvd. id: " << id << "\n";
  m_tml_comm.recv_broadcast(is_tagged,0);
  //cout << "recvd. is_tagged: " << is_tagged << "\n";
  
  typename T::ScalarFieldFunction rdf=T::getScalarFieldFunction(fieldname);
  ScalarParticleFieldSlave<T> *new_spfs;
  if(is_tagged==0)
  {
    new_spfs=new ScalarParticleFieldSlave<T>(&m_tml_comm,m_ppa,rdf);
  }
  else
  {
    int tag,mask;
    m_tml_comm.recv_broadcast(tag,0);
    console.XDebug() << "recvd. tag: " << tag << "\n";
    m_tml_comm.recv_broadcast(mask,0);
    console.XDebug() << "recvd. mask: " << mask << "\n";
    new_spfs=new ScalarParticleFieldSlaveTagged<T>(&m_tml_comm,m_ppa,rdf,tag,mask);
  }
  m_field_slaves.insert(make_pair(id,new_spfs));
}

template <class T>
void TSubLattice<T>::addVectorParticleField()
{
  console.XDebug() << "TSubLattice<T>::addVectorParticleField\n";
  string fieldname;
  int id,is_tagged;

  m_tml_comm.recv_broadcast_cont(fieldname,0);
  console.XDebug() << "recvd. fieldname: " << fieldname << "\n";
  m_tml_comm.recv_broadcast(id,0);
  console.XDebug() << "recvd. id: " << id << "\n";
  m_tml_comm.recv_broadcast(is_tagged,0);
  console.XDebug() << "recvd. is_tagged: " << is_tagged << "\n";

  typename T::VectorFieldFunction rdf=T::getVectorFieldFunction(fieldname);
  VectorParticleFieldSlave<T> *new_vpfs;
  if(is_tagged==0)
  {
    new_vpfs=new VectorParticleFieldSlave<T>(&m_tml_comm,m_ppa,rdf);
  }
  else
  {
    int tag,mask;
    m_tml_comm.recv_broadcast(tag,0);
    console.XDebug() << "recvd. tag: " << tag << "\n";
    m_tml_comm.recv_broadcast(mask,0);
    console.XDebug() << "recvd. mask: " << mask << "\n";
    new_vpfs=new VectorParticleFieldSlaveTagged<T>(&m_tml_comm,m_ppa,rdf,tag,mask);
  }
  m_field_slaves.insert(make_pair(id,new_vpfs));

  console.Debug() << "end TSubLattice<T>::addVectorParticleField\n";
}


template <class T>
void TSubLattice<T>::addScalarInteractionField()
{
  console.XDebug() << "TSubLattice<T>::addScalarInteractionField\n";
  string fieldname;
  string igname;
  string igtype;
  int id,is_tagged,tag,mask,is_checked;
  
  m_tml_comm.recv_broadcast_cont(fieldname,0);
  console.XDebug() << "recvd. fieldname: " << fieldname << "\n";
  m_tml_comm.recv_broadcast(id,0);
  console.XDebug() << "recvd. id: " << id << "\n";
  m_tml_comm.recv_broadcast_cont(igname,0);
  console.XDebug() << "recvd. interaction group name: " << igname << "\n";
  m_tml_comm.recv_broadcast_cont(igtype,0);
  console.XDebug() << "recvd. interaction group name: " << igtype << "\n";
  m_tml_comm.recv_broadcast(is_tagged,0);
  console.XDebug() << "recvd. is_tagged: " << is_tagged << "\n";
  
  // get interaction group
  map<string,AParallelInteractionStorage*>::iterator it=m_dpis.find(igname);
  if(is_tagged==1)
  {
    m_tml_comm.recv_broadcast(tag,0);
    m_tml_comm.recv_broadcast(mask,0);
  }
  m_tml_comm.recv_broadcast(is_checked,0);
  console.XDebug() << "recvd. is_checked: " << is_checked << "\n";
  
  if(it!=m_dpis.end())
  {
    console.XDebug() << "found interaction group in dynamic\n";
    AFieldSlave* new_sifs;
    new_sifs=(it->second)->generateNewScalarFieldSlave(&m_tml_comm,fieldname,is_checked,is_tagged,tag,mask);
    m_field_slaves.insert(make_pair(id,new_sifs));
  }
  else
  {
    it=m_bpis.find(igname);
    if(it!=m_bpis.end()){
       console.XDebug() << "found interaction group in bonded\n";
      AFieldSlave* new_sifs;
      new_sifs=(it->second)->generateNewScalarFieldSlave(&m_tml_comm,fieldname,is_checked,is_tagged,tag,mask);
      m_field_slaves.insert(make_pair(id,new_sifs));
    }
    else // not in dynamic or bonded -> try damping
      {
        //typename map<string,CDampingGroup<T>*>::iterator it2=m_damping.find(igname);
        it=m_damping.find(igname);
        if(it!=m_damping.end()) // found it in damping
          {
            AFieldSlave* new_sifs;
            new_sifs=(it->second)->generateNewScalarFieldSlave(&m_tml_comm,fieldname,is_checked,is_tagged,tag,mask);
            m_field_slaves.insert(make_pair(id,new_sifs));
          } 
        else // still not found -> unknown name -> error 
          {
            cerr << "ERROR : unknown interaction group name in addScalarInteractionField " << endl;
          }
      }
  }
  
   console.XDebug() << "end TSubLattice<T>::addScalarInteractionField\n";
}

template <class T>
void TSubLattice<T>::addVectorInteractionField()
{
  console.Debug() << "TSubLattice<T>::addVectorInteractionField\n";
  string fieldname;
  string igname;
  string igtype;
  int id,is_tagged,tag,mask,is_checked;
  
  m_tml_comm.recv_broadcast_cont(fieldname,0);
  console.XDebug() << "recvd. fieldname: " << fieldname << "\n";
  m_tml_comm.recv_broadcast(id,0);
  console.XDebug() << "recvd. id: " << id << "\n";
  m_tml_comm.recv_broadcast_cont(igname,0);
  console.XDebug() << "recvd. interaction group name: " << igname << "\n";
  m_tml_comm.recv_broadcast_cont(igtype,0);
  console.XDebug() << "recvd. interaction group type: " << igtype << "\n";
  m_tml_comm.recv_broadcast(is_tagged,0);
  console.XDebug() << "recvd. is_tagged: " << is_tagged << "\n";
  
  // get interaction group
  map<string,AParallelInteractionStorage*>::iterator it=m_dpis.find(igname);
  if(is_tagged==1)
  {
    m_tml_comm.recv_broadcast(tag,0);
    m_tml_comm.recv_broadcast(mask,0);
  }
  m_tml_comm.recv_broadcast(is_checked,0);
  console.XDebug() << "recvd. is_checked: " << is_checked << "\n";
  
  if(it!=m_dpis.end())
  {
    console.XDebug() << "found interaction group in dynamic\n";
    AFieldSlave* new_sifs;
    new_sifs=(it->second)->generateNewVectorFieldSlave(&m_tml_comm,fieldname,is_checked,is_tagged,tag,mask);
    if(new_sifs!=NULL){
      m_field_slaves.insert(make_pair(id,new_sifs));
    } else {
      console.Error()<<"ERROR: could not generate Field Slave for field " << fieldname << "\n";
    }
  }
  else
  {
    it=m_bpis.find(igname);
    if(it!=m_bpis.end()){
      console.XDebug() << "found interaction group in bonded\n";
      AFieldSlave* new_sifs;
      new_sifs=(it->second)->generateNewVectorFieldSlave(&m_tml_comm,fieldname,is_checked,is_tagged,tag,mask);
      m_field_slaves.insert(make_pair(id,new_sifs));
    }
    else // not in dynamic or bonded -> try damping
      {
        //typename map<string,CDampingGroup<T>*>::iterator it2=m_damping.find(igname);
        it=m_damping.find(igname);
        if(it!=m_damping.end()) // found it in damping
          {
            AFieldSlave* new_sifs;
            new_sifs=(it->second)->generateNewVectorFieldSlave(&m_tml_comm,fieldname,is_checked,is_tagged,tag,mask);
            m_field_slaves.insert(make_pair(id,new_sifs));
          } 
        else // still not found -> unknown name -> error 
          {
            cerr << "ERROR : unknown interaction group name in addScalarInteractionField " << endl;
          }
      }
  }
  
  console.Debug() << "end TSubLattice<T>::addVectorInteractionField\n";
}

template <class T>
void TSubLattice<T>::addVectorTriangleField()
{
  console.Debug() << "TSubLattice<T>::addVectorTriangleField()\n";
  string fieldname;
  string meshname;
  int id;

  // receive params
  m_tml_comm.recv_broadcast_cont(fieldname,0);
  console.XDebug() << "recvd. fieldname: " << fieldname << "\n";
  m_tml_comm.recv_broadcast_cont(meshname,0);
  console.XDebug() << "recvd. meshname: " << meshname << "\n";
  m_tml_comm.recv_broadcast(id,0);
  console.XDebug() << "recvd. id: " << id << "\n";

  map<string,TriMesh*>::iterator tm=m_mesh.find(meshname);
  // if meshname is in trimesh map
  if (tm!=m_mesh.end()){  
    // get reader function
    Triangle::VectorFieldFunction rdf=Triangle::getVectorFieldFunction(fieldname);
    // check it 
    if(rdf==NULL){
      console.Critical() << "NULL rdf !!!\n";
    }
    VectorTriangleFieldSlave* new_vfs=new VectorTriangleFieldSlave(&m_tml_comm,tm->second,rdf);
    m_field_slaves.insert(make_pair(id,new_vfs));
  } else {
    map<string,Mesh2D*>::iterator m2d=m_mesh2d.find(meshname);
    if(m2d!=m_mesh2d.end()){
      Edge2D::VectorFieldFunction rdf=Edge2D::getVectorFieldFunction(fieldname);
      // check it 
      if(rdf==NULL){
        console.Critical() << "NULL rdf !!!\n";
      }  
      VectorEdge2DFieldSlave* new_efs= new VectorEdge2DFieldSlave(&m_tml_comm,m2d->second,rdf);
      m_field_slaves.insert(make_pair(id,new_efs));
    }
  }
  console.Debug() << "end TSubLattice<T>::addVectorTriangleField()\n";
}

template <class T>
void TSubLattice<T>::addScalarTriangleField()
{
  console.Debug() << "TSubLattice<T>::addScalarTriangleField()\n";
  string fieldname;
  string meshname;
  int id;

  // receive params
  m_tml_comm.recv_broadcast_cont(fieldname,0);
  console.XDebug() << "recvd. fieldname: " << fieldname << "\n";
  m_tml_comm.recv_broadcast_cont(meshname,0);
  console.XDebug() << "recvd. meshname: " << meshname << "\n";
  m_tml_comm.recv_broadcast(id,0);
  console.XDebug() << "recvd. id: " << id << "\n";

  // get reader function
  Triangle::ScalarFieldFunction rdf=Triangle::getScalarFieldFunction(fieldname);
  // check it 
  if(rdf==NULL){
    console.Critical() << "NULL rdf !!!\n";
  }
  ScalarTriangleFieldSlave* new_vtfs=new ScalarTriangleFieldSlave(&m_tml_comm,m_mesh[meshname],rdf);
  m_field_slaves.insert(make_pair(id,new_vtfs));
  console.Debug() << "end TSubLattice<T>::addScalarTriangleField()\n";
}

template <class T>
void TSubLattice<T>::addVectorWallField()
{
  console.XDebug() << "begin TSubLattice<T>::addVectorWallField()\n";
  string fieldname;
  string tmp_wallname;
  vector<string> wallnames; 
  int nwall;
  int id;

  // receive params
  m_tml_comm.recv_broadcast_cont(fieldname,0);
  console.XDebug() << "recvd. fieldname: " << fieldname << "\n";
  m_tml_comm.recv_broadcast(nwall,0);
  console.XDebug() << "recvd. nwall: " << nwall << "\n";
  for(int i=0;i<nwall;i++){
    m_tml_comm.recv_broadcast_cont(tmp_wallname,0);
    wallnames.push_back(tmp_wallname);
    console.XDebug() << "recvd. wallname: " << tmp_wallname << "\n";
    tmp_wallname.clear();
  }
  m_tml_comm.recv_broadcast(id,0);
  console.XDebug() << "recvd. id: " << id << "\n";

  // check validity of 1st wall name
  map<string,CWall*>::iterator cwalliter=m_walls.find(*(wallnames.begin()));
  if(cwalliter==m_walls.end()){ // 1st wall name invalid -> exit
    std::stringstream msg;
    msg
      << "ERROR in addVectorWallField: wallname '"
      << *(wallnames.begin()) << " 'invalid. Valid wall names: ";
    for (map<string,CWall*>::const_iterator it = m_walls.begin(); it != m_walls.end(); it++)
    {
      msg << "'" << it->first << "' ";
    }
    console.Error() << msg.str() << "\n";
    throw std::runtime_error(msg.str());
  } else { // first wall valid -> try to get slave
    // get summation flag from wall
    int sumflag=(cwalliter->second)->getFieldSummationFlag(fieldname);
    // if process 1, send summation flag back to master
    if(m_tml_comm.rank()==1){
      m_tml_comm.send(sumflag,0);
    }
    m_tml_comm.barrier();

    //field slave
    AWallFieldSlave* new_fs=(cwalliter->second)->generateVectorFieldSlave(&m_tml_comm,fieldname);

    // try to insert other walls
    vector<string>::iterator niter=wallnames.begin();
    if(niter!=wallnames.end()) niter++ ; // jump past 1st wall - already got it
    while(niter!=wallnames.end()){
      string wname=*niter;
      map<string,CWall*>::iterator iter=m_walls.find(wname);
      if(iter==m_walls.end()){ // wall name invalid -> exit
        std::stringstream msg;
        msg
          << "ERROR in addVectorWallField: wallname '"
          << wname << " 'invalid";
        for (map<string,CWall*>::const_iterator it = m_walls.begin(); it != m_walls.end(); it++)
        {
          msg << "'" << it->first << "' ";
        }

        console.Error() << msg.str() << "\n";
        throw std::runtime_error(msg.str());
      } else {
        new_fs->addWall(iter->second);
      }
      niter++;
    }
    if(new_fs!=NULL){
      m_field_slaves.insert(make_pair(id,new_fs));
    } else {
      console.Error() << "ERROR in addVectorWallField: got NULL Slave\n";
    }
  }

  console.XDebug() << "end TSubLattice<T>::addVectorWallField()\n";
}

template <class T>
void TSubLattice<T>::sendFieldData()
{
  console.Debug() << "TSubLattice<T>::sendFieldData()\n";
  // receive id's of field to send
  int id;
  m_tml_comm.recv_broadcast(id,0);
  console.Debug()  << "received field id " << id << " for data collection\n" ;
  if(m_field_slaves[id] != NULL)
  {
    m_field_slaves[id]->sendData();
  }
  else
  { // can not happen
    cerr << "NULL pointer in m_field_slaves!" << endl;
  }
  // call the sending function of the field
  console.Debug() << "end TSubLattice<T>::sendFieldData()\n";
}


// ---- Checkpointing ----------
template <class T>
void TSubLattice<T>::saveSnapShotData(std::ostream &oStream)
{
  // get precision of output stream and set it to 9 significant digits
  std::streamsize oldprec=oStream.precision(9);

  //
  // Save particle check-point data
  //
  ParticleArray &particleArray = dynamic_cast<ParticleArray &>(*m_ppa);
  typename ParticleArray::ParticleIterator
    particleIt(particleArray.getInnerParticleIterator());

  const std::string delim = "\n";
  
  oStream << particleIt.getNumRemaining() << delim;
  while (particleIt.hasNext()) {
    particleIt.next().saveSnapShotData(oStream);
    oStream << delim;
  }

  //
  // Save Bonded interaction check-point data.
  //
  typedef std::map<string,AParallelInteractionStorage*> NameBondedInteractionsMap;
  typename NameBondedInteractionsMap::iterator it;
  oStream << m_bpis.size() << delim;
  for (it = m_bpis.begin(); it != m_bpis.end(); it++) {
    it->second->saveSnapShotData(oStream);
    oStream << delim;
  }

  // dump trimeshdata (if exists)
  oStream << "TMIG " << m_mesh.size() << delim;
  for(typename map<string,TriMesh*>::iterator tm_iter=m_mesh.begin();
      tm_iter!=m_mesh.end();
      tm_iter++){
    oStream << tm_iter->first << delim;
    tm_iter->second->writeCheckPoint(oStream,delim);
  }

  // restore output stream to old precision
  oStream.precision(oldprec);
}

template <class T>
void TSubLattice<T>::saveCheckPointData(std::ostream &oStream)
{
  const std::string delim = "\n";
  //
  // Save particle check-point data
  //
  m_ppa->saveCheckPointData(oStream);

  //
  // Save Bonded interaction check-point data.
  //
  typedef std::map<string,AParallelInteractionStorage*> NameBondedInteractionsMap;
  typename NameBondedInteractionsMap::iterator it;
  oStream << m_bpis.size() << delim;
  for (it = m_bpis.begin(); it != m_bpis.end(); it++) {
    it->second->saveCheckPointData(oStream);
    oStream << delim;
  }

  //
  // Save Non-bonded interaction check-point data
  //
  int count_save=0;
  for(std::map<string,AParallelInteractionStorage*>::iterator iter=m_dpis.begin();
      iter!=m_dpis.end();
      iter++){
    if(iter->second->willSave()) count_save++; 
  }
  oStream << count_save << delim;
  for(std::map<string,AParallelInteractionStorage*>::iterator iter=m_dpis.begin();
      iter!=m_dpis.end();
      iter++){
    if(iter->second->willSave()) {
      iter->second->saveCheckPointData(oStream);
      oStream << delim;
    }
  }

  // Save walls (name, pos, normal) 
  oStream << "Walls " << m_walls.size() << delim;
  for(map<string,CWall*>::iterator w_iter=m_walls.begin();
      w_iter!=m_walls.end();
      w_iter++){
    oStream << w_iter->first << delim;
    w_iter->second->writeCheckPoint(oStream,delim);
  }

  // dump trimeshdata (if exists)
  oStream << "TriMesh " << m_mesh.size() << delim;
  for(typename map<string,TriMesh*>::iterator tm_iter=m_mesh.begin();
      tm_iter!=m_mesh.end();
      tm_iter++){
    oStream << tm_iter->first << delim;
    tm_iter->second->writeCheckPoint(oStream,delim);
  }
  // dump 2D mesh data (if exists)
  oStream << "Mesh2D " << m_mesh2d.size() << delim;
  for(typename map<string,Mesh2D*>::iterator tm_iter=m_mesh2d.begin();
      tm_iter!=m_mesh2d.end();
      tm_iter++){
    oStream << tm_iter->first << delim;
    tm_iter->second->writeCheckPoint(oStream,delim);
  }
}

template <class T>
void TSubLattice<T>::loadCheckPointData(std::istream &iStream)
{
  // get particles
  m_ppa->loadCheckPointData(iStream);

  // rebuild neighbor table
  CMPIBarrier barrier(getWorkerComm());
  m_ppa->rebuild();
  barrier.wait("PPA rebuild");

  //-- get bonds --
  // get nr. of bonded interaction group in the checkpoint file
  unsigned int nr_bonded_ig;
  iStream >> nr_bonded_ig;
  
  // compare with existing bonded particle interaction storage (bpis)
  // barf if not equal
  if(nr_bonded_ig!=m_bpis.size()){
    std::cerr << "number of bonded interaction groups differ between snapshot and script!" << std::endl;
  } else { // numbers fit -> read data
    for (map<string,AParallelInteractionStorage*>::iterator it = m_bpis.begin(); 
         it != m_bpis.end(); 
         it++) { // for all interaction groups
      it->second->loadCheckPointData(iStream);
    }
  } 
  //-- get nonbonded interactions --
  // get nr. of non-bonded interaction group in the checkpoint file
  unsigned int nr_nonbonded_ig;
  iStream >> nr_nonbonded_ig;
  
  // compare with existing non-bonded (dynamic) particle interaction storage (dpis)
  // barf if not equal
  if(nr_nonbonded_ig!=m_dpis.size()){
    std::cerr << "number of dynamic interaction groups differ between snapshot and script!" << std::endl;
  } else { // numbers fit -> read data
    for (map<string,AParallelInteractionStorage*>::iterator it = m_dpis.begin(); 
         it != m_dpis.end(); 
         it++) { // for all interaction groups
      it->second->loadCheckPointData(iStream);
    }
  } 
  //--- load walls ---
  string token;
  iStream >> token;
  if(token!="Walls") { // found wrong token -> barf 
    std::cerr << "expected Walls , got " << token << std::endl;
  }
  // nr. of walls
  int nwalls;
  iStream >> nwalls;
  // read wall names & data
  string wname;
  for(int i=0;i<nwalls;i++){
    CWall* new_wall = new CWall();
    iStream >> wname;
    new_wall->loadCheckPoint(iStream);
    m_walls[wname]=new_wall;
  }
  // --- load meshes -- 
  int nmesh;
  string mname;
  // Trimesh (3D) 
  iStream >> token;
  if(token!="TriMesh") { // found wrong token -> barf 
    std::cerr << "expected TriMesh , got " << token << std::endl;
  }
  // nr. of meshes 
  iStream >> nmesh;
  // read wall names & data
  for(int i=0;i<nmesh;i++){
    TriMesh* new_tm=new TriMesh(); 
    iStream >> mname;
    new_tm->loadCheckPoint(iStream);
    m_mesh.insert(make_pair(mname,new_tm)); 
  }
  // Mesh2D  
  iStream >> token;
  if(token!="Mesh2D") { // found wrong token -> barf 
    std::cerr << "expected Mesh2D , got " << token << std::endl;
  }
  // nr. of meshes 
  iStream >> nmesh;
  // read wall names & data
  for(int i=0;i<nmesh;i++){
    Mesh2D* new_m2d=new Mesh2D(); 
    iStream >> mname;
    new_m2d->loadCheckPoint(iStream);
    m_mesh2d.insert(make_pair(mname,new_m2d)); 
  }
}

// -- mesh data exchange functions --

template <class T>
void TSubLattice<T>::getMeshNodeRef()
{
  console.XDebug() << "TSubLattice<T>::getMeshNodeRef()\n"; 
  vector<int> ref_vec;
  
  // MPI buffer
  CVarMPIBuffer param_buffer(m_comm);
  // receive mesh name 
  param_buffer.receiveBroadcast(0);
  string meshname=param_buffer.pop_string();
  console.XDebug() << "Mesh name: " << meshname << "\n";

  // find mesh & collect node ids into array
  map<string,TriMesh*>::iterator tm=m_mesh.find(meshname);
  if (tm!=m_mesh.end()){
    for(TriMesh::corner_iterator iter=(tm->second)->corners_begin();
        iter!=(tm->second)->corners_end();
        iter++){
      ref_vec.push_back(iter->getID());
    }
  } else {
    map<string,Mesh2D*>::iterator m2d=m_mesh2d.find(meshname);
    if(m2d!=m_mesh2d.end()){
      for(Mesh2D::corner_iterator iter=(m2d->second)->corners_begin();
          iter!=(m2d->second)->corners_end();
          iter++){
        ref_vec.push_back(iter->getID());
      } 
    } else {
      console.Critical() << "ERROR - WRONG MESH NAME IN getMeshNodeRef() !! \n";
    }
  }
  // send back to master 
  m_tml_comm.send_gather(ref_vec,0);

  console.XDebug() << "end TSubLattice<T>::getMeshNodeRef()\n"; 
}

template <class T>
void TSubLattice<T>::getMeshFaceRef()
{ 
  console.XDebug() << "TSubLattice<T>::getMeshFaceRef()\n"; 
  vector<int> ref_vec;
  
  // MPI buffer
  CVarMPIBuffer param_buffer(m_comm);
  // receive mesh name 
  param_buffer.receiveBroadcast(0);
  string meshname=param_buffer.pop_string();
  console.XDebug() << "Mesh name: " << meshname << "\n";

  // find mesh & collect node ids into array
  map<string,TriMesh*>::iterator tm=m_mesh.find(meshname);
  if (tm!=m_mesh.end()){
    for(TriMesh::triangle_iterator iter=(tm->second)->triangles_begin();
        iter!=(tm->second)->triangles_end();
        iter++){
      ref_vec.push_back(iter->getID());
    }
  } else {
    map<string,Mesh2D*>::iterator m2d=m_mesh2d.find(meshname);
    if(m2d!=m_mesh2d.end()){
      for(Mesh2D::edge_iterator iter=(m2d->second)->edges_begin();
          iter!=(m2d->second)->edges_end();
          iter++){
        ref_vec.push_back(iter->getID());
      } 
    } else {
      console.Critical() << "ERROR - WRONG MESH NAME IN getMeshNodeRef() !! \n";
    }
  }
  // send back to master 
  m_tml_comm.send_gather(ref_vec,0);

  console.XDebug() << "end TSubLattice<T>::getMeshNodeRef()\n"; 
}

template <class T>
void TSubLattice<T>::getMesh2DStress()
{
  console.XDebug() << "TSubLattice<T>::getMesh2DStress()\n";
  // receive mesh name
  // MPI buffer
  CVarMPIBuffer param_buffer(m_comm);
  param_buffer.receiveBroadcast(0);
  string meshname=param_buffer.pop_string();
  console.XDebug() << "Mesh name: " << meshname << "\n";

  // find mesh & collect data
  map<string,Mesh2D*>::iterator m2d=m_mesh2d.find(meshname);
  if(m2d!=m_mesh2d.end()){    
    vector<pair<int,Vec3> > data_vec;
    // get data
    data_vec=(m2d->second)->forAllEdgesGetIndexed(&Edge2D::getForceDensity);
    
    // send data to master
    m_tml_comm.send_gather(data_vec,0);
  } else {
    console.Critical() << "ERROR - WRONG MESH NAME IN getMesh2DStress() !! \n";
  }
  
  console.XDebug() << "end TSubLattice<T>::getMesh2DStress()\n";
} 

template <class T>
void TSubLattice<T>::getTriMeshForce()
{
  console.XDebug() << "TSubLattice<T>::getTriMeshStress(): enter\n";
  // receive mesh name
  // MPI buffers
  CVarMPIBuffer param_buffer(m_comm);
  param_buffer.receiveBroadcast(0);
  const std::string meshName = param_buffer.pop_string();
  console.XDebug() << "Mesh name: " << meshName << "\n";

  // find mesh & collect data
  map<string,TriMesh*>::iterator m=m_mesh.find(meshName);
  if(m != m_mesh.end()){
    vector<pair<int,Vec3> > data_vec;
    // get data
    data_vec=(m->second)->forAllTrianglesGetIndexed(&Triangle::getForce);
    
    // send data to master
    m_tml_comm.send_gather(data_vec,0);
  } else {
    std::stringstream msg;
    msg << "Invalid mesh name: " << meshName << ". No such triangular mesh.";
    throw std::runtime_error(msg.str().c_str());
  }
  
  console.XDebug() << "TSubLattice<T>::getTriMeshStress(): exit\n";
}