vector<Real> DemFuncs::contactCoordQuantiles(const shared_ptr<DemField>& dem, const vector<Real>& quantiles, const shared_ptr<Node>& node, const AlignedBox3r& box){
vector<Real> ret;
ret.reserve(quantiles.size());
if(quantiles.empty()) return ret;
vector<Real> coords;
// count contacts first
// this count will be off when range is given; it will be larger, so copying is avoided at the cost of some spurious allocation
size_t N;
#if 0
N=boost::range::count_if(*dem->contacts,[&](const shared_ptr<Contact>& C)->bool{ return C->isReal(); });
coords.reserve(N);
#endif
for(const shared_ptr<Contact>& C: *dem->contacts){
if(!C->isReal()) continue;
Vector3r p=node?node->glob2loc(C->geom->node->pos):C->geom->node->pos;
if(!box.isEmpty() && !box.contains(p)) continue;
coords.push_back(p[2]);
};
// no contacts yet, return NaNs
if(coords.empty()){
for(size_t i=0; i<quantiles.size(); i++) ret.push_back(NaN);
return ret;
}
boost::range::sort(coords);
N=coords.size(); // should be the same as N before
for(Real q: quantiles){
// clamp the value to 0,1
q=min(max(0.,q),1.);
if(isnan(q)) q=0.; // just to make sure
int i=min((int)((N-1)*q),(int)N-1);
ret.push_back(coords[i]);
}
return ret;
}
Real DemFuncs::porosity(const shared_ptr<DemField>& dem, const shared_ptr<Node>& node, const AlignedBox3r& box){
Real Vs=0; // solid volume
Real V=box.volume(); // box volume
for(const auto& p: *dem->particles){
if(!p->shape->isA<Sphere>()) continue;
const Vector3r& pos=p->shape->nodes[0]->pos;
if(!box.contains(node?node->glob2loc(pos):pos)) continue;
Vs+=(4/3.)*M_PI*pow(p->shape->cast<Sphere>().radius,3);
}
return Vs/V;
}
/* See https://yade-dem.org/doc/yade.utils.html#yade.utils.avgNumInteractions for docs */
Real DemFuncs::coordNumber(const shared_ptr<DemField>& dem, const shared_ptr<Node>& node, const AlignedBox3r& box, int mask, bool skipFree){
long C2=0; // twice the number of contacts (counted for each participating particle)
long N0=0; // number of particles without contact (floaters)
long N1=0; // number of particles with one contact (rattlers)
long N=0; // number of all particles
for(const auto& p: *dem->particles){
const Vector3r& pos=p->shape->nodes[0]->pos;
if(mask && (mask&p->mask)==0) continue;
if(p->shape->nodes[0]->getData<DemData>().isClumped()) throw std::runtime_error("Not yet implemented for clumps.");
if(!box.contains(node?node->glob2loc(pos):pos)) continue;
int n=p->countRealContacts();
if(n==0) N0++;
else if(n==1) N1++;
N++;
C2+=n;
}
if(skipFree) return (C2-N1)*1./(N-N0-N1);
else return C2*1./N;
}
vector<Vector2r> DemFuncs::boxPsd(const Scene* scene, const DemField* dem, const AlignedBox3r& box, bool mass, int num, int mask, Vector2r rRange){
bool haveBox=!isnan(box.min()[0]) && !isnan(box.max()[0]);
return psd(
*dem->particles|boost::adaptors::filtered([&](const shared_ptr<Particle>&p){ return p && p->shape && p->shape->nodes.size()==1 && (mask?(p->mask&mask):true) && (bool)(dynamic_pointer_cast<woo::Sphere>(p->shape)) && (haveBox?box.contains(p->shape->nodes[0]->pos):true); }),
/*cumulative*/true,/*normalize*/true,
num,
rRange,
/*diameter getter*/[](const shared_ptr<Particle>&p) ->Real { return 2.*p->shape->cast<Sphere>().radius; },
/*weight getter*/[&](const shared_ptr<Particle>&p) -> Real{ return mass?p->shape->nodes[0]->getData<DemData>().mass:1.; }
);
}
void RandomInlet::run(){
DemField* dem=static_cast<DemField*>(field.get());
if(!generator) throw std::runtime_error("RandomInlet.generator==None!");
if(materials.empty()) throw std::runtime_error("RandomInlet.materials is empty!");
if(collideExisting){
if(!collider){
for(const auto& e: scene->engines){ collider=dynamic_pointer_cast<Collider>(e); if(collider) break; }
if(!collider) throw std::runtime_error("RandomInlet: no Collider found within engines (needed for collisions detection with already existing particles; if you don't need that, set collideExisting=False.)");
}
if(dynamic_pointer_cast<InsertionSortCollider>(collider)) static_pointer_cast<InsertionSortCollider>(collider)->forceInitSort=true;
}
if(isnan(massRate)) throw std::runtime_error("RandomInlet.massRate must be given (is "+to_string(massRate)+"); if you want to generate as many particles as possible, say massRate=0.");
if(massRate<=0 && maxAttempts==0) throw std::runtime_error("RandomInlet.massFlowRate<=0 (no massFlowRate prescribed), but RandomInlet.maxAttempts==0. (unlimited number of attempts); this would cause infinite loop.");
if(maxAttempts<0){
std::runtime_error("RandomInlet.maxAttempts must be non-negative. Negative value, leading to meaking engine dead, is achieved by setting atMaxAttempts=RandomInlet.maxAttDead now.");
}
spheresOnly=generator->isSpheresOnly();
padDist=generator->padDist();
if(isnan(padDist) || padDist<0) throw std::runtime_error(generator->pyStr()+".padDist(): returned invalid value "+to_string(padDist));
// as if some time has already elapsed at the very start
// otherwise mass flow rate is too big since one particle during Δt exceeds it easily
// equivalent to not running the first time, but without time waste
if(stepPrev==-1 && stepPeriod>0) stepPrev=-stepPeriod;
long nSteps=scene->step-stepPrev;
// to be attained in this step;
stepGoalMass+=massRate*scene->dt*nSteps; // stepLast==-1 if never run, which is OK
vector<AlignedBox3r> genBoxes; // of particles created in this step
vector<shared_ptr<Particle>> generated;
Real stepMass=0.;
SpherePack spheres;
//
if(spheresOnly){
spheres.pack.reserve(dem->particles->size()*1.2); // something extra for generated particles
// HACK!!!
bool isBox=dynamic_cast<BoxInlet*>(this);
AlignedBox3r box;
if(isBox){ box=this->cast<BoxInlet>().box; }
for(const auto& p: *dem->particles){
if(p->shape->isA<Sphere>() && (!isBox || box.contains(p->shape->nodes[0]->pos))) spheres.pack.push_back(SpherePack::Sph(p->shape->nodes[0]->pos,p->shape->cast<Sphere>().radius));
}
}
while(true){
// finished forever
if(everythingDone()) return;
// finished in this step
if(massRate>0 && mass>=stepGoalMass) break;
shared_ptr<Material> mat;
Vector3r pos=Vector3r::Zero();
Real diam;
vector<ParticleGenerator::ParticleAndBox> pee;
int attempt=-1;
while(true){
attempt++;
/***** too many tries, give up ******/
if(attempt>=maxAttempts){
generator->revokeLast(); // last particle could not be placed
if(massRate<=0){
LOG_DEBUG("maxAttempts="<<maxAttempts<<" reached; since massRate is not positive, we're done in this step");
goto stepDone;
}
switch(atMaxAttempts){
case MAXATT_ERROR: throw std::runtime_error("RandomInlet.maxAttempts reached ("+lexical_cast<string>(maxAttempts)+")"); break;
case MAXATT_DEAD:{
LOG_INFO("maxAttempts="<<maxAttempts<<" reached, making myself dead.");
this->dead=true;
return;
}
case MAXATT_WARN: LOG_WARN("maxAttempts "<<maxAttempts<<" reached before required mass amount was generated; continuing, since maxAttemptsError==False"); break;
case MAXATT_SILENT: break;
default: throw std::invalid_argument("Invalid value of RandomInlet.atMaxAttempts="+to_string(atMaxAttempts)+".");
}
}
/***** each maxAttempts/attPerPar, try a new particles *****/
if((attempt%(maxAttempts/attemptPar))==0){
LOG_DEBUG("attempt "<<attempt<<": trying with a new particle.");
if(attempt>0) generator->revokeLast(); // if not at the beginning, revoke the last particle
// random choice of material with equal probability
if(materials.size()==1) mat=materials[0];
else{
size_t i=max(size_t(materials.size()*Mathr::UnitRandom()),materials.size()-1);;
mat=materials[i];
}
// generate a new particle
std::tie(diam,pee)=(*generator)(mat,scene->time);
assert(!pee.empty());
LOG_TRACE("Placing "<<pee.size()<<"-sized particle; first component is a "<<pee[0].par->getClassName()<<", extents from "<<pee[0].extents.min().transpose()<<" to "<<pee[0].extents.max().transpose());
}
pos=randomPosition(diam,padDist); // overridden in child classes
LOG_TRACE("Trying pos="<<pos.transpose());
for(const auto& pe: pee){
// make translated copy
AlignedBox3r peBox(pe.extents); peBox.translate(pos);
// box is not entirely within the factory shape
if(!validateBox(peBox)){ LOG_TRACE("validateBox failed."); goto tryAgain; }
const shared_ptr<woo::Sphere>& peSphere=dynamic_pointer_cast<woo::Sphere>(pe.par->shape);
if(spheresOnly){
if(!peSphere) throw std::runtime_error("RandomInlet.spheresOnly: is true, but a nonspherical particle ("+pe.par->shape->pyStr()+") was returned by the generator.");
Real r=peSphere->radius;
Vector3r subPos=peSphere->nodes[0]->pos;
for(const auto& s: spheres.pack){
// check dist && don't collide with another sphere from this clump
// (abuses the *num* counter for clumpId)
if((s.c-(pos+subPos)).squaredNorm()<pow(s.r+r,2)){
LOG_TRACE("Collision with a particle in SpherePack (a particle generated in this step).");
goto tryAgain;
}
}
// don't add to spheres until all particles will have been checked for overlaps (below)
} else {
// see intersection with existing particles
bool overlap=false;
if(collideExisting){
vector<Particle::id_t> ids=collider->probeAabb(peBox.min(),peBox.max());
for(const auto& id: ids){
LOG_TRACE("Collider reports intersection with #"<<id);
if(id>(Particle::id_t)dem->particles->size() || !(*dem->particles)[id]) continue;
const shared_ptr<Shape>& sh2((*dem->particles)[id]->shape);
// no spheres, or they are too close
if(!peSphere || !sh2->isA<woo::Sphere>() || 1.1*(pos-sh2->nodes[0]->pos).squaredNorm()<pow(peSphere->radius+sh2->cast<Sphere>().radius,2)) goto tryAgain;
}
}
// intersection with particles generated by ourselves in this step
for(size_t i=0; i<genBoxes.size(); i++){
overlap=(genBoxes[i].squaredExteriorDistance(peBox)==0.);
if(overlap){
const auto& genSh(generated[i]->shape);
// for spheres, try to compute whether they really touch
if(!peSphere || !genSh->isA<Sphere>() || (pos-genSh->nodes[0]->pos).squaredNorm()<pow(peSphere->radius+genSh->cast<Sphere>().radius,2)){
LOG_TRACE("Collision with "<<i<<"-th particle generated in this step.");
goto tryAgain;
}
}
}
}
}
LOG_DEBUG("No collision (attempt "<<attempt<<"), particle will be created :-) ");
if(spheresOnly){
// num will be the same for all spheres within this clump (abuse the *num* counter)
for(const auto& pe: pee){
Vector3r subPos=pe.par->shape->nodes[0]->pos;
Real r=pe.par->shape->cast<Sphere>().radius;
spheres.pack.push_back(SpherePack::Sph((pos+subPos),r,/*clumpId*/(pee.size()==1?-1:num)));
}
}
break;
tryAgain: ; // try to position the same particle again
}
// particle was generated successfully and we have place for it
for(const auto& pe: pee){
genBoxes.push_back(AlignedBox3r(pe.extents).translate(pos));
generated.push_back(pe.par);
}
num+=1;
#ifdef WOO_OPENGL
Real color_=isnan(color)?Mathr::UnitRandom():color;
#endif
if(pee.size()>1){ // clump was generated
//LOG_WARN("Clumps not yet tested properly.");
vector<shared_ptr<Node>> nn;
for(auto& pe: pee){
auto& p=pe.par;
p->mask=mask;
#ifdef WOO_OPENGL
assert(p->shape);
if(color_>=0) p->shape->color=color_; // otherwise keep generator-assigned color
#endif
if(p->shape->nodes.size()!=1) LOG_WARN("Adding suspicious clump containing particle with more than one node (please check, this is perhaps not tested");
for(const auto& n: p->shape->nodes){
nn.push_back(n);
n->pos+=pos;
}
dem->particles->insert(p);
}
shared_ptr<Node> clump=ClumpData::makeClump(nn,/*no central node pre-given*/shared_ptr<Node>(),/*intersection*/false);
auto& dyn=clump->getData<DemData>();
if(shooter) (*shooter)(clump);
if(scene->trackEnergy) scene->energy->add(-DemData::getEk_any(clump,true,true,scene),"kinInlet",kinEnergyIx,EnergyTracker::ZeroDontCreate);
if(dyn.angVel!=Vector3r::Zero()){
throw std::runtime_error("pkg/dem/RandomInlet.cpp: generated particle has non-zero angular velocity; angular momentum should be computed so that rotation integration is correct, but it was not yet implemented.");
// TODO: compute initial angular momentum, since we will (very likely) use the aspherical integrator
}
ClumpData::applyToMembers(clump,/*reset*/false); // apply velocity
#ifdef WOO_OPENGL
boost::mutex::scoped_lock lock(dem->nodesMutex);
#endif
dyn.linIx=dem->nodes.size();
dem->nodes.push_back(clump);
mass+=clump->getData<DemData>().mass;
stepMass+=clump->getData<DemData>().mass;
} else {
auto& p=pee[0].par;
p->mask=mask;
assert(p->shape);
#ifdef WOO_OPENGL
if(color_>=0) p->shape->color=color_;
#endif
assert(p->shape->nodes.size()==1); // if this fails, enable the block below
const auto& node0=p->shape->nodes[0];
assert(node0->pos==Vector3r::Zero());
node0->pos+=pos;
auto& dyn=node0->getData<DemData>();
if(shooter) (*shooter)(node0);
if(scene->trackEnergy) scene->energy->add(-DemData::getEk_any(node0,true,true,scene),"kinInlet",kinEnergyIx,EnergyTracker::ZeroDontCreate);
mass+=dyn.mass;
stepMass+=dyn.mass;
assert(node0->hasData<DemData>());
dem->particles->insert(p);
#ifdef WOO_OPENGL
boost::mutex::scoped_lock lock(dem->nodesMutex);
#endif
dyn.linIx=dem->nodes.size();
dem->nodes.push_back(node0);
// handle multi-nodal particle (unused now)
#if 0
// TODO: track energy of the shooter
// in case the particle is multinodal, apply the same to all nodes
if(shooter) shooter(p.shape->nodes[0]);
const Vector3r& vel(p->shape->nodes[0]->getData<DemData>().vel); const Vector3r& angVel(p->shape->nodes[0]->getData<DemData>().angVel);
for(const auto& n: p.shape->nodes){
auto& dyn=n->getData<DemData>();
dyn.vel=vel; dyn.angVel=angVel;
mass+=dyn.mass;
n->linIx=dem->nodes.size();
dem->nodes.push_back(n);
}
#endif
}
};
stepDone:
setCurrRate(stepMass/(nSteps*scene->dt));
}