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/*************************************************************************
* Copyright (C) 2008 by Jerome Duriez *
* duriez@geo.hmg.inpg.fr *
* *
* This program is free software; it is licensed under the terms of the *
* GNU General Public License v2 or later. See file LICENSE for details. *
*************************************************************************/
#include "SimpleShear.hpp"
#include <pkg/dem/NormalInelasticPM.hpp>
#include<pkg/dem/GlobalStiffnessTimeStepper.hpp>
#include<pkg/common/Aabb.hpp>
#include<core/Scene.hpp>
#include<pkg/common/InsertionSortCollider.hpp>
#include<core/Interaction.hpp>
#include<pkg/common/Dispatching.hpp>
#include<pkg/common/InteractionLoop.hpp>
#include<pkg/common/ForceResetter.hpp>
#include<pkg/dem/NewtonIntegrator.hpp>
#include<pkg/common/GravityEngines.hpp>
#include<pkg/dem/KinemC__Engine.hpp>
#include<pkg/dem/Ig2_Sphere_Sphere_ScGeom.hpp>
#include<pkg/dem/Ig2_Box_Sphere_ScGeom.hpp>
#include<pkg/common/Bo1_Aabb.hpp>
#include<pkg/common/Bo1_Aabb.hpp>
#include<core/Body.hpp>
#include<pkg/common/Box.hpp>
#include<pkg/common/Sphere.hpp>
#include <boost/filesystem.hpp>
#include <utility>
YADE_PLUGIN((SimpleShear))
CREATE_LOGGER(SimpleShear);
SimpleShear::~SimpleShear ()
{
}
bool SimpleShear::generate(std::string& message)
{
scene = shared_ptr<Scene>(new Scene);
createActors(scene);
// Box walls
shared_ptr<Body> w1; // The left one :
createBox(w1,Vector3r(-thickness/2.0,(height)/2.0,0),Vector3r(thickness/2.0,5*(height/2.0+thickness),width/2.0));
scene->bodies->insert(w1);
shared_ptr<Body> w2; // The lower one :
createBox(w2,Vector3r(length/2.0,-thickness/2.0,0),Vector3r(length/2.0,thickness/2.0,width/2.0));
YADE_PTR_CAST<FrictMat> (w2->material)->frictionAngle = sphereFrictionDeg * Mathr::PI/180.0; // so that we have phi(spheres-inferior wall)=phi(sphere-sphere)
scene->bodies->insert(w2);
shared_ptr<Body> w3; // The right one
createBox(w3,Vector3r(length+thickness/2.0,height/2.0,0),Vector3r(thickness/2.0,5*(height/2.0+thickness),width/2.0));
scene->bodies->insert(w3);
shared_ptr<Body> w4; // The upper one
createBox(w4,Vector3r(length/2.0,height+thickness/2.0,0),Vector3r(length/2.0,thickness/2.0,width/2.0));
YADE_PTR_CAST<FrictMat> (w4->material)->frictionAngle = sphereFrictionDeg * Mathr::PI/180.0; // so that we have phi(spheres-superior wall)=phi(sphere-sphere)
scene->bodies->insert(w4);
// To close the front and the back of the box
shared_ptr<Body> w5; // behind
createBox(w5,Vector3r(length/2.0,height/2.0,-width/2.0-thickness/2.0), Vector3r(2.5*length/2.0,height/2.0+thickness,thickness/2.0));
scene->bodies->insert(w5);
shared_ptr<Body> w6; // the front
createBox(w6,Vector3r(length/2.0,height/2.0,width/2.0+thickness/2.0),
Vector3r(2.5*length/2.0,height/2.0+thickness,thickness/2.0));
scene->bodies->insert(w6);
// the list which will contain the positions of centers and the radii of the created spheres
vector<BasicSphere> sphere_list;
// to use the TriaxialTest method :
string out=GenerateCloud(sphere_list,Vector3r(0,0,-width/2.0),Vector3r(length,height,width/2.0),1000,0.3,0.7);// tries to generate a sample of 1000 spheres, with a required porosity of 0.7
cout << out << endl;
// to use a text file :
// std::pair<string,bool> res=ImportCloud(sphere_list,filename);
vector<BasicSphere>::iterator it = sphere_list.begin();
vector<BasicSphere>::iterator it_end = sphere_list.end();
shared_ptr<Body> body;
for (;it!=it_end; ++it)
{
createSphere(body,it->first,it->second);
scene->bodies->insert(body);
}
return true;
}
void SimpleShear::createSphere(shared_ptr<Body>& body, Vector3r position, Real radius)
{
body = shared_ptr<Body>(new Body); body->groupMask=1;
shared_ptr<NormalInelasticMat> mat(new NormalInelasticMat);
shared_ptr<Aabb> aabb(new Aabb);
shared_ptr<Sphere> iSphere(new Sphere);
body->state->pos =position;
body->state->ori =Quaternionr::Identity();
body->state->vel =Vector3r(0,0,0);
body->state->angVel =Vector3r(0,0,0);
Real masse =4.0/3.0*Mathr::PI*radius*radius*radius*density;
body->state->mass =masse;
body->state->inertia = Vector3r(2.0/5.0*masse*radius*radius,2.0/5.0*masse*radius*radius,2.0/5.0*masse*radius*radius);
mat->young = sphereYoungModulus;
mat->poisson = spherePoissonRatio;
mat->frictionAngle = sphereFrictionDeg * Mathr::PI/180.0;
body->material = mat;
aabb->color = Vector3r(0,1,0);
iSphere->radius = radius;
iSphere->color = ((int)(floor(8*position.x()/length)))%2?Vector3r(0.7,0.7,0.7):Vector3r(0.45,0.45,0.45);// so that we have eight different colour bands
body->shape = iSphere;
body->bound = aabb;
}
void SimpleShear::createBox(shared_ptr<Body>& body, Vector3r position, Vector3r extents)
{
body = shared_ptr<Body>(new Body); body->groupMask=1;
shared_ptr<NormalInelasticMat> mat(new NormalInelasticMat);
shared_ptr<Aabb> aabb(new Aabb);
// shared_ptr<BoxModel> gBox(new BoxModel);
shared_ptr<Box> iBox(new Box);
iBox->wire = true;
body->setDynamic(false);
body->state->angVel = Vector3r(0,0,0);
body->state->vel = Vector3r(0,0,0);
// NB : mass and inertia not defined because not used, since Box are not dynamics
body->state->pos = position;
body->state->ori = Quaternionr::Identity();
mat->young = boxYoungModulus;
mat->poisson = boxPoissonRatio;
mat->frictionAngle = 0.0; //default value, modified after for w2 and w4 to have good values of phi(sphere-walls)
body->material = mat;
aabb->color = Vector3r(1,0,0);
/* gBox->extents = extents;
gBox->color = Vector3r(1,0,0);
gBox->wire = true;
gBox->shadowCaster = false;*/
iBox->extents = extents;
iBox->color = Vector3r(1,0,0);
body->bound = aabb;
body->shape = iBox;
// body->geometricalModel = gBox;
}
void SimpleShear::createActors(shared_ptr<Scene>& scene)
{
shared_ptr<IGeomDispatcher> interactionGeometryDispatcher(new IGeomDispatcher);
interactionGeometryDispatcher->add(new Ig2_Sphere_Sphere_ScGeom6D);
interactionGeometryDispatcher->add(new Ig2_Box_Sphere_ScGeom6D);
shared_ptr<IPhysDispatcher> interactionPhysicsDispatcher(new IPhysDispatcher);
shared_ptr<IPhysFunctor> CL1Rel(new Ip2_2xNormalInelasticMat_NormalInelasticityPhys);
interactionPhysicsDispatcher->add(CL1Rel);
shared_ptr<InsertionSortCollider> collider(new InsertionSortCollider);
collider->boundDispatcher->add(new Bo1_Sphere_Aabb);
collider->boundDispatcher->add(new Bo1_Box_Aabb);
shared_ptr<GravityEngine> gravityCondition(new GravityEngine);
gravityCondition->gravity = gravity;
shared_ptr<GlobalStiffnessTimeStepper> globalStiffnessTimeStepper(new GlobalStiffnessTimeStepper);
globalStiffnessTimeStepper->timeStepUpdateInterval = timeStepUpdateInterval;
globalStiffnessTimeStepper->defaultDt=3e-6;
shared_ptr<KinemCTDEngine> kinemEngine (new KinemCTDEngine);
kinemEngine->compSpeed = 10.0;
kinemEngine->targetSigma=2000.0;
shared_ptr<InteractionLoop> ids(new InteractionLoop);
ids->geomDispatcher=interactionGeometryDispatcher;
ids->physDispatcher=interactionPhysicsDispatcher;
ids->lawDispatcher=shared_ptr<LawDispatcher>(new LawDispatcher);
shared_ptr<Law2_ScGeom6D_NormalInelasticityPhys_NormalInelasticity> ldc(new Law2_ScGeom6D_NormalInelasticityPhys_NormalInelasticity);
ids->lawDispatcher->add(ldc);
scene->engines.clear();
scene->engines.push_back(shared_ptr<Engine>(new ForceResetter));
scene->engines.push_back(globalStiffnessTimeStepper);
scene->engines.push_back(collider);
scene->engines.push_back(ids);
if(gravApplied)
scene->engines.push_back(gravityCondition);
scene->engines.push_back(shared_ptr<Engine> (new NewtonIntegrator));
scene->engines.push_back(kinemEngine);
}
string SimpleShear::GenerateCloud(vector<BasicSphere>& sphere_list,Vector3r lowerCorner,Vector3r upperCorner,long number,Real rad_std_dev, Real porosity)
{
sphere_list.clear();
long tries = 1000; //nb max of tries for positionning the next sphere
Vector3r dimensions = upperCorner - lowerCorner;
Real mean_radius = pow(dimensions.x()*dimensions.y()*dimensions.z()*(1-porosity)/(4.0/3.0*Mathr::PI*number),1.0/3.0);
cerr << " mean radius " << mean_radius << endl;;
// std::cerr << "generating aggregates ... ";
long t, i;
for (i=0; i<number; ++i)
{
BasicSphere s;
for (t=0; t<tries; ++t)
{
s.second = (Mathr::UnitRandom()-0.5)*rad_std_dev*mean_radius+mean_radius;
s.first.x() = lowerCorner.x()+s.second+(dimensions.x()-2*s.second)*Mathr::UnitRandom();
s.first.y() = lowerCorner.y()+s.second+(dimensions.y()-2*s.second)*Mathr::UnitRandom();
s.first.z() = lowerCorner.z()+s.second+(dimensions.z()-2*s.second)*Mathr::UnitRandom();
bool overlap=false;
for (long j=0; (j<i && !overlap); j++)
if ( pow(sphere_list[j].second+s.second, 2) > (sphere_list[j].first-s.first).squaredNorm()) overlap=true;
if (!overlap)
{
sphere_list.push_back(s);
// cout << "j'ai bien rajoute une sphere dans la liste" << endl;
break;
}
}
if (t==tries)
{
string str1="Generated a sample with " + boost::lexical_cast<string>(i) + " spheres inside box of dimensions: ("
+ boost::lexical_cast<string>(dimensions[0]) + ","
+ boost::lexical_cast<string>(dimensions[1]) + ","
+ boost::lexical_cast<string>(dimensions[2]) + ").\n";
return str1 + "More than " + boost::lexical_cast<string>(tries) + " tries while generating sphere number " +
boost::lexical_cast<string>(i+1) + "/" + boost::lexical_cast<string>(number) + ".";
}
}
return "Generated a sample with " + boost::lexical_cast<string>(number) + " spheres inside box of dimensions: ("
+ boost::lexical_cast<string>(dimensions[0]) + ","
+ boost::lexical_cast<string>(dimensions[1]) + ","
+ boost::lexical_cast<string>(dimensions[2]) + ").";
}
std::pair<string,bool> SimpleShear::ImportCloud(vector<BasicSphere>& sphere_list,string importFilename)
{
sphere_list.clear();
int nombre=0;
if(importFilename.size() != 0 && boost::filesystem::exists(importFilename) )
{
ifstream loadFile(importFilename.c_str()); // cree l'objet loadFile de la classe ifstream qui va permettre de lire ce qu'il y a dans importFilename
// Real zJF;
// while( !loadFile.eof() ) // tant qu'on n'est pas a la fin du fichier
// {
// BasicSphere s; // l'elt de la liste sphere_list (= la sphere) que l'on va lire maintenant
// loadFile >> s.first.X();// le X de la position de son centre
// loadFile >> zJF;
// s.first.Z()=zJF - width/2.0;// le Z de la position de son centre
// loadFile >> s.first.Y();// le Y de la position de son centre
// loadFile >> s.second; // son rayon
// sphere_list.push_back(s);
// nombre++;
// }
Real it;
while( !loadFile.eof() ) // tant qu'on n'est pas a la fin du fichier
{
BasicSphere s; // l'elt de la liste sphere_list (= la sphere) que l'on va lire maintenant
loadFile >> it;
loadFile >> s.second; // son rayon
loadFile >> s.first.x();
loadFile >> s.first.y();// le y de la position de son centre
loadFile >> s.first.z();// le z de la position de son centre
sphere_list.push_back(s);
nombre++;
}
return std::make_pair(std::string("Echantillon correctement genere : " + boost::lexical_cast<string>(nombre) + " billes"),true);
}
else
{
cerr << "Cannot find input file" << endl;
return std::make_pair("Cannot find input file",false);
}
}
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