/usr/include/liggghts/volume_mesh_I.h is in libliggghts-dev 3.7.0+repack1-1.
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This is the
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╚══════╝╚═╝ ╚═════╝ ╚═════╝ ╚═════╝ ╚═╝ ╚═╝ ╚═╝ ╚══════╝®
DEM simulation engine, released by
DCS Computing Gmbh, Linz, Austria
http://www.dcs-computing.com, office@dcs-computing.com
LIGGGHTS® is part of CFDEM®project:
http://www.liggghts.com | http://www.cfdem.com
Core developer and main author:
Christoph Kloss, christoph.kloss@dcs-computing.com
LIGGGHTS® is open-source, distributed under the terms of the GNU Public
License, version 2 or later. It is distributed in the hope that it will
be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. You should have
received a copy of the GNU General Public License along with LIGGGHTS®.
If not, see http://www.gnu.org/licenses . See also top-level README
and LICENSE files.
LIGGGHTS® and CFDEM® are registered trade marks of DCS Computing GmbH,
the producer of the LIGGGHTS® software and the CFDEM®coupling software
See http://www.cfdem.com/terms-trademark-policy for details.
-------------------------------------------------------------------------
Contributing author and copyright for this file:
(if not contributing author is listed, this file has been contributed
by the core developer)
Copyright 2012- DCS Computing GmbH, Linz
Copyright 2009-2012 JKU Linz
------------------------------------------------------------------------- */
#ifndef LMP_VOLUME_MESH_I_H
#define LMP_VOLUME_MESH_I_H
#define NTRY_MC_VOLUME_MESH_I_H 30000
#define NITER_MC_VOLUME_MESH_I_H 5
#define TOLERANCE_MC_VOLUME_MESH_I_H 0.05
/* ----------------------------------------------------------------------
constructor(s), destructor
------------------------------------------------------------------------- */
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::VolumeMesh(LAMMPS *lmp)
: TrackingMesh<NUM_NODES>(lmp),
// TODO should keep volMeshSubdomain up-to-date more often for insertion faces
volMesh_(*this->prop().template addGlobalProperty < ScalarContainer<double> > ("volMesh", "comm_none","frame_trans_rot_invariant","restart_no",3)),
vol_ (*this->prop().template addElementProperty< ScalarContainer<double> > ("vol", "comm_exchange_borders","frame_trans_rot_invariant", "restart_no",3)),
volAcc_ (*this->prop().template addElementProperty< ScalarContainer<double> > ("volAcc","comm_exchange_borders","frame_trans_rot_invariant", "restart_no",3)),
faceNodes_ (*this->prop().template addElementProperty< MultiVectorContainer<int,NUM_FACES,NUM_NODES_PER_FACE> > ("faceNodes ","comm_exchange_borders","frame_invariant", "restart_no")),
faceNormals_ (*this->prop().template addElementProperty< MultiVectorContainer<double,NUM_FACES,3> > ("faceNormals ","comm_none","frame_scale_trans_invariant", "restart_no")),
isBoundaryFace_ (*this->prop().template addElementProperty< VectorContainer<bool,NUM_FACES> > ("isBoundaryFace","comm_exchange_borders","frame_invariant", "restart_no")),
nNeighs_ (*this->prop().template addElementProperty< ScalarContainer<int> > ("nNeighs", "comm_exchange_borders","frame_invariant", "restart_no")),
neighElems_ (*this->prop().template addElementProperty< VectorContainer<int,NUM_FACES> > ("neighElems", "comm_exchange_borders","frame_invariant", "restart_no"))
{
volMesh_.add(0.);
volMesh_.add(0.);
volMesh_.add(0.);
volMesh_.add(0.);
this->error->all(FLERR,"have to add neigh topology with comm_exchange_borders");
}
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::~VolumeMesh()
{}
/* ----------------------------------------------------------------------
add / delete element
------------------------------------------------------------------------- */
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
bool VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::addElement(double **nodeToAdd)
{
TrackingMesh<NUM_NODES>::addElement(nodeToAdd,-1);
this->error->one(FLERR,"TODO line #");
this->error->one(FLERR,"TODO auto remove dupl");
calcVolPropertiesOfNewElement();
return true;
}
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::deleteElement(int n)
{
TrackingMesh<NUM_NODES>::deleteElement(n);
}
/* ----------------------------------------------------------------------
calculate properties when adding new element
------------------------------------------------------------------------- */
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::calcVolPropertiesOfNewElement()
{
int f0[3],f1[3],f2[3],f3[3];
int n = MultiNodeMesh<NUM_NODES>::node_.size()-1;
// flip node 3 if on the wrong side
checkOrientation(n);
// assign nodes to faces
vectorConstruct3D(f0,0,1,2);
vectorConstruct3D(f1,0,3,1);
vectorConstruct3D(f2,0,2,3);
vectorConstruct3D(f1,1,3,2);
faceNodes_.set(n,0,f0);
faceNodes_.set(n,1,f1);
faceNodes_.set(n,2,f2);
faceNodes_.set(n,3,f3);
// calc face normals
calcFaceNormals(n);
// calc volume
double vol_elem = calcVol(n);
volMesh_(0) += vol_elem;
vol_(n) = vol_elem;
volAcc_(n) = vol_elem;
if(n > 0) volAcc_(n) += volAcc_(n-1);
}
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
inline void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::checkOrientation(int n)
{
double v01[3],v02[3],v03[3],tmp[3];
double **node = this->node_.begin()[n];
vectorSubtract3D(node[1],node[0],v01);
vectorSubtract3D(node[2],node[0],v02);
vectorSubtract3D(node[3],node[0],v03);
vectorCross3D(v01,v02,tmp);
// if wrong orientation, switch node 0 and 1
if(vectorDot3D(tmp,v03) > 0.)
{
vectorCopy3D(node[0],tmp);
vectorCopy3D(node[1],node[0]);
vectorCopy3D(tmp,node[1]);
}
}
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::calcFaceNormals(int n)
{
double v01[3],v02[3],fnormal[3];
double **node = this->node_.begin()[n];
int **facenodes = this->faceNodes_(n);
for(int iFace = 0; iFace < NUM_FACES; iFace++)
{
vectorSubtract3D(node[facenodes[iFace][1]],node[facenodes[iFace][0]],v01);
vectorSubtract3D(node[facenodes[iFace][2]],node[facenodes[iFace][0]],v02);
vectorCross3D(v01,v02,fnormal);
vectorNormalize3D(fnormal);
faceNormals_.set(n,iFace,fnormal);
}
}
/* ----------------------------------------------------------------------
recalculate properties on setup (on start and during simulation)
------------------------------------------------------------------------- */
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::refreshOwned(int setupFlag)
{
TrackingMesh<NUM_NODES>::refreshOwned(setupFlag);
// (re)calculate all properties for owned elements
recalcLocalVolProperties();
}
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::refreshGhosts(int setupFlag)
{
TrackingMesh<NUM_NODES>::refreshGhosts(setupFlag);
recalcGhostVolProperties();
}
/* ----------------------------------------------------------------------
recalculate properties of local elements
------------------------------------------------------------------------- */
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::recalcLocalVolProperties()
{
// volMeshGlobal [volMesh_(0)] and volMeshOwned [volMesh_(1)]
// calculated here
volMesh_(0) = 0.;
volMesh_(1) = 0.;
int nlocal = this->sizeLocal();
for(int i = 0; i < nlocal; i++)
{
calcFaceNormals(i);
vol(i) = calcVol(i);
volAcc(i) = vol(i);
if(i > 0) volAcc(i) += volAcc(i-1);
// add to local volume
volMesh_(1) += vol(i);
}
// mesh vol must be summed up
MPI_Sum_Scalar(volMesh_(1),volMesh_(0),this->world);
}
/* ----------------------------------------------------------------------
recalculate properties of ghost elements
------------------------------------------------------------------------- */
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::recalcGhostVolProperties()
{
double pos[3];
int n_succ, n_iter;
int nlocal = this->sizeLocal();
int nall = this->sizeLocal()+this->sizeGhost();
// volMeshGhost [volMesh_(2)] and volMeshSubdomain [volMesh_(3)]
// calculated here
// accumulated vol includes owned and ghosts
volMesh_(2) = 0.;
for(int i = nlocal; i < nall; i++)
{
calcFaceNormals(i);
vol(i) = calcVol(i);
volAcc(i) = vol(i);
if(i > 0) volAcc(i) += volAcc(i-1);
// add to ghost area
volMesh_(2) += vol(i);
}
// calc area of owned and ghost elements in my subdomain
volMesh_(3) = 0.;
double volCheck = 0.;
if(this->isInsertionMesh())
{
n_succ = 0;
n_iter = 0;
// iterate long enough so MC has the desired tolerance
while( (n_iter < NITER_MC_VOLUME_MESH_I_H) &&
(fabs((volCheck-volMeshGlobal()))/volMeshGlobal() > TOLERANCE_MC_VOLUME_MESH_I_H) )
{
// only generate random positions if I have any mesh elements
if(nall)
{
for(int i = 0; i < NTRY_MC_VOLUME_MESH_I_H; i++)
{
// pick a random position on owned or ghost element
if((generateRandomOwnedGhost(pos) >= 0) && (this->domain->is_in_subdomain(pos)))
n_succ++;
}
}
n_iter++;
volMesh_(3) = static_cast<double>(n_succ)/static_cast<double>(NTRY_MC_VOLUME_MESH_I_H*n_iter) * (volMeshOwned()+volMeshGhost());
MPI_Sum_Scalar(volMesh_(3),volCheck,this->world);
}
if(fabs((volCheck-volMeshGlobal()))/volMeshGlobal() > TOLERANCE_MC_VOLUME_MESH_I_H)
this->error->all(FLERR,"Local mesh volume calculation failed, try boosting NITER_MC_VOLUME_MESH_I_H");
// correct so sum of all owned vols is equal to global area
volMesh_(3) *= volMeshGlobal()/volCheck;
}
}
/* ----------------------------------------------------------------------
generate a random Element by volAcc
------------------------------------------------------------------------- */
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
int VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::randomOwnedGhostElement()
{
if(!this->isInsertionMesh()) this->error->one(FLERR,"Illegal call for non-insertion mesh");
double r = this->random_->uniform() * (volMeshOwned()+volMeshGhost());
int nall = this->sizeLocal()+this->sizeGhost()-1;
return searchElementByVolAcc(r,0,nall);
}
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
int VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::searchElementByVolAcc(double vol,int lo, int hi)
{
if( (lo < 1 || vol > volAcc(lo-1)) && (vol <= volAcc(lo)) )
return lo;
if( (hi < 1 || vol > volAcc(hi-1)) && (vol <= volAcc(hi)) )
return hi;
int mid = static_cast<int>((lo+hi)/2);
if(vol > volAcc(mid))
return searchElementByVolAcc(vol,mid,hi);
else
return searchElementByVolAcc(vol,lo,mid);
}
/* ----------------------------------------------------------------------
build neighlist, generate mesh topology
------------------------------------------------------------------------- */
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::buildNeighbours()
{
int iFace,jFace;
// iterate over all elems, over ghosts as well
int nall = this->sizeLocal()+this->sizeGhost();
// inititalize neigh topology - reset to default, ~n
int neighs[NUM_FACES];
bool isb[NUM_FACES];
for(int i=0;i<NUM_FACES;i++)
{
neighs[i] = -1;
isb[i] = true;
}
for(int i = 0; i < nall; i++)
{
nNeighs_.set(i,0);
neighElems_.set(i,neighs);
isBoundaryFace_.set(i,isb);
}
// build neigh topology, ~n*n/2
for(int i = 0; i < nall; i++)
{
for(int j = i+1; j < nall; j++)
{
if(0 == this->nSharedNodes(i,j)) continue;
if(shareFace(i,j,iFace,jFace))
{
neighElems_(i)[nNeighs_(i)] = this->id(i);
neighElems_(j)[nNeighs_(j)] = this->id(j);
nNeighs_(i)++;
nNeighs_(j)++;
isBoundaryFace_(i)[iFace] = false;
isBoundaryFace_(j)[jFace] = false;
}
}
}
}
/* ----------------------------------------------------------------------
isInside etc
------------------------------------------------------------------------- */
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
bool VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::isInside(double *p)
{
// check subdomain
if(!this->domain->is_in_subdomain(p)) return false;
// check bbox
if(!this->bbox_.isInside(p)) return false;
int nall = this->size();
// brute force
for(int i = 0; i < nall; i++)
if(isInside(i,p)) return true;
return false;
}
/* ----------------------------------------------------------------------
move, rotate, scale mesh
------------------------------------------------------------------------- */
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::move(const double * const vecTotal, const double * const vecIncremental)
{
TrackingMesh<NUM_NODES>::move(vecTotal,vecIncremental);
}
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::move(const double * const vecIncremental)
{
TrackingMesh<NUM_NODES>::move(vecIncremental);
}
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::scale(double factor)
{
TrackingMesh<NUM_NODES>::scale(factor);
}
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::rotate(const double * const totalQ, const double * const dQ, const double * const totalDispl, const double * const dDisp)
{
TrackingMesh<NUM_NODES>::rotate(totalQ,dQ,totalDispl,dDisp);
}
template<int NUM_NODES,int NUM_FACES,int NUM_NODES_PER_FACE>
void VolumeMesh<NUM_NODES,NUM_FACES,NUM_NODES_PER_FACE>::rotate(const double * const dQ, const double * const dDispl)
{
TrackingMesh<NUM_NODES>::rotate(dQ,dDispl);
}
#endif
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