void ComputeParticlesFallsPosition(MeshModel* base_mesh,MeshModel* cloud_mesh,CMeshO::CoordType dir){
CMeshO::VertexIterator vi;
MetroMeshFaceGrid f_grid;
f_grid.Set(base_mesh->cm.face.begin(),base_mesh->cm.face.end());
MarkerFace markerFunctor;
markerFunctor.SetMesh(&(base_mesh->cm));
RayTriangleIntersectionFunctor<false> RSectFunct;
CMeshO::PerVertexAttributeHandle<Particle<CMeshO> > ph= tri::Allocator<CMeshO>::GetPerVertexAttribute<Particle<CMeshO> >(cloud_mesh->cm,"ParticleInfo");
std::vector<CMeshO::VertexPointer> ToDelVec;
for(vi=cloud_mesh->cm.vert.begin();vi!=cloud_mesh->cm.vert.end();++vi){
Particle<CMeshO> info=ph[vi];
if((*vi).IsS()){
Point3f p_c=vi->P()+info.face->N().normalized()*0.1;
Ray3<float> ray=Ray3<float>(p_c,dir);
float di;
CMeshO::FacePointer new_f=f_grid.DoRay<RayTriangleIntersectionFunctor<false>,MarkerFace>(RSectFunct,markerFunctor,ray,base_mesh->cm.bbox.Diag(),di);
if(new_f!=0){
ph[vi].face=new_f;
float u;
float v;
float t;
IntersectionRayTriangle<float>(ray,new_f->P(0),new_f->P(1),new_f->P(2),t,u,v);
Point3f bc(1-u-v,u,v);
vi->P()=fromBarCoords(bc,new_f);
vi->ClearS();
new_f->C()=Color4b::Red;
}else{
ToDelVec.push_back(&*vi);
}
}
}
for(unsigned int i=0;i<ToDelVec.size();i++){
if(!ToDelVec[i]->IsD()) Allocator<CMeshO>::DeleteVertex(cloud_mesh->cm,*ToDelVec[i]);
}
}
/**
@def This function compute the Surface Exposure per face of a Mesh m
@param MeshModel* m - Pointer to the new mesh
@param int r - scaling factor
@param int n_ray - number of rays emitted
@return nothing
*/
void ComputeSurfaceExposure(MeshModel* m,int r,int n_ray){
CMeshO::PerFaceAttributeHandle<float> eh=vcg::tri::Allocator<CMeshO>::AddPerFaceAttribute<float>(m->cm,std::string("exposure"));
float dh=1.2;
float exp=0;
float di=0;
float xi=0;
CMeshO::FacePointer face;
CMeshO::CoordType p_c;
MetroMeshFaceGrid f_grid;
f_grid.Set(m->cm.face.begin(),m->cm.face.end());
MarkerFace markerFunctor;
markerFunctor.SetMesh(&(m->cm));
RayTriangleIntersectionFunctor<false> RSectFunct;
CMeshO::FaceIterator fi;
for(fi=m->cm.face.begin();fi!=m->cm.face.end();++fi){
xi=0;
eh[fi]=0;
for(int i=0;i<n_ray;i++){
//For every f_face get the central point
p_c=fromBarCoords(RandomBaricentric(),&*fi);
//Create a ray with p_c as origin and direction N
p_c=p_c+NormalizedNormal(*fi)*0.1;
Ray3<float> ray=Ray3<float>(p_c,fi->N());
di=0;
face=0;
face=f_grid.DoRay<RayTriangleIntersectionFunctor<false>,MarkerFace>(RSectFunct,markerFunctor,ray,1000,di);
if(di!=0){
xi=xi+(dh/(dh-di));
}
}
exp=1-(xi/n_ray);
eh[fi]=exp;
}
}
void associateParticles(MeshModel* b_m,MeshModel* c_m,float &m,float &v,CMeshO::CoordType g){
MetroMeshFaceGrid unifGridFace;
Point3f closestPt;
CMeshO::PerVertexAttributeHandle<Particle<CMeshO> > ph= tri::Allocator<CMeshO>::AddPerVertexAttribute<Particle<CMeshO> > (c_m->cm,std::string("ParticleInfo"));
unifGridFace.Set(b_m->cm.face.begin(),b_m->cm.face.end());
MarkerFace markerFunctor;
markerFunctor.SetMesh(&(b_m->cm));
float dist=1;
float dist_upper_bound=dist;
CMeshO::VertexIterator vi;
vcg::face::PointDistanceBaseFunctor<CMeshO::ScalarType> PDistFunct;
for(vi=c_m->cm.vert.begin();vi!=c_m->cm.vert.end();++vi){
Particle<CMeshO>* part = new Particle<CMeshO>();
CMeshO::FacePointer f=unifGridFace.GetClosest(PDistFunct,markerFunctor,vi->P(),dist_upper_bound,dist,closestPt);
part->face=f;
part->face->Q()=part->face->Q()+1;
part->mass=m;
part->velocity=v;
part->v=getVelocityComponent(v,f,g);
ph[vi]=*part;
}
}
int SnapVertexBorder(CMeshO &m, float threshold, vcg::CallBackPos * cb)
{
tri::Allocator<CMeshO>::CompactVertexVector(m);
tri::Allocator<CMeshO>::CompactFaceVector(m);
tri::UpdateTopology<CMeshO>::FaceFace(m);
tri::UpdateFlags<CMeshO>::FaceBorderFromFF(m);
tri::UpdateFlags<CMeshO>::VertexBorderFromFace(m);
tri::UpdateNormal<CMeshO>::PerVertexNormalizedPerFaceNormalized(m);
typedef GridStaticPtr<CMeshO::FaceType, CMeshO::ScalarType > MetroMeshFaceGrid;
MetroMeshFaceGrid unifGridFace;
typedef tri::FaceTmark<CMeshO> MarkerFace;
MarkerFace markerFunctor;
vcg::face::PointDistanceBaseFunctor<CMeshO::ScalarType> PDistFunct;
tri::UpdateFlags<CMeshO>::FaceClearV(m);
unifGridFace.Set(m.face.begin(),m.face.end());
markerFunctor.SetMesh(&m);
int faceFound;
int K = 20;
Point3f startPt;
float maxDist = m.bbox.Diag()/20;
vector<Point3f> splitVertVec;
vector<CMeshO::FacePointer> splitFaceVec;
vector<int> splitEdgeVec;
for(CMeshO::VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi)
if(!(*vi).IsD() && (*vi).IsB())
{
int percPos = (tri::Index(m,*vi) *100) / m.vn;
cb(percPos,"Snapping vertices");
vector<CMeshO::FacePointer> faceVec;
vector<float> distVec;
vector<Point3f> pointVec;
Point3f u;
startPt = (*vi).P();
faceFound = unifGridFace.GetKClosest(PDistFunct,markerFunctor, K, startPt,maxDist, faceVec, distVec, pointVec);
CMeshO::FacePointer bestFace = 0;
float localThr, bestDist = std::numeric_limits<float>::max();
Point3f bestPoint;
int bestEdge;
// qDebug("Found %i face for vertex %i",faceFound,vi-m.vert.begin());
for(int i=0;i<faceFound;++i)
{
const float epsilonSmall = 1e-5;
const float epsilonBig = 1e-2;
CMeshO::FacePointer fp=faceVec[i];
InterpolationParameters(*fp,fp->cN(),pointVec[i],u);
// qDebug(" face %i face for vertex %5.3f %5.3f %5.3f dist %5.3f (%c %c %c)",fp-&*m.face.begin(),u[0],u[1],u[2],distVec[i],IsBorder(*fp,0)?'b':' ',IsBorder(*fp,1)?'b':' ',IsBorder(*fp,2)?'b':' ');
for(int j=0;j<3;++j)
{
if(IsBorder(*fp,j) && !fp->IsV())
{
if( u[(j+0)%3] > epsilonBig &&
u[(j+1)%3] > epsilonBig &&
u[(j+2)%3] < epsilonSmall )
{
if(distVec[i] < bestDist)
{
bestDist=distVec[i];
//bestPoint=pointVec[i];
bestPoint=(*vi).cP();
bestFace=fp;
bestEdge=j;
}
}
}
}
} // end for each faceFound
if(bestFace)
localThr = threshold*Distance(bestFace->P0(bestEdge),bestFace->P1(bestEdge));
if(bestDist < localThr && !bestFace->IsV())
{
bestFace->SetV();
(*vi).C()= Color4b::Blue;
//bestFace->C()=Color4b::LightBlue;
(*vi).SetS();
splitVertVec.push_back(bestPoint);
splitEdgeVec.push_back(bestEdge);
splitFaceVec.push_back(bestFace);
}
}
tri::Allocator<CMeshO>::PointerUpdater<CMeshO::FacePointer> pu;
CMeshO::VertexIterator firstVert = tri::Allocator<CMeshO>::AddVertices(m,splitVertVec.size());
CMeshO::FaceIterator firstface = tri::Allocator<CMeshO>::AddFaces(m,splitVertVec.size(),pu);
//
// ^ ^
// / \ / | \ .
// / \ / | \ .
// / \ / | \ .
// / fp \ / | \ .
// / \ / fp | ff \ .
// V0 ------------------V2 V0 -------fv---------V2
// i
for(size_t i=0;i<splitVertVec.size();++i)
{
firstVert->P() = splitVertVec[i];
int eInd = splitEdgeVec[i];
CMeshO::FacePointer fp = splitFaceVec[i];
pu.Update(fp);
firstface->V(0) = &*firstVert;
firstface->V(1) = fp->V2(eInd);
firstface->V(2) = fp->V0(eInd);
// firstface->C()=Color4b::LightBlue;
fp->V0(eInd) = &*firstVert;
++firstface;
++firstVert;
}
tri::UpdateNormal<CMeshO>::PerVertexNormalizedPerFaceNormalized(m);
return splitVertVec.size();
}
