aggiunta funzione PasoDobleSmooth e relative:
- FitMesh - FaceErrorGrad - CrossProdGradient - TriAreaGradient - NormalSmooth e le classi: - PDVertInfo - PDFaceInfo necessarie per utilizzare SimpleTempData
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@ -23,6 +23,9 @@
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/****************************************************************************
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History
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$Log: not supported by cvs2svn $
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Revision 1.1 2004/12/11 14:53:19 ganovelli
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first partial porting: compiled gcc,intel and msvc
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/****************************************************************************/
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@ -494,6 +497,221 @@ void DepthSmooth(MESH_TYPE &m,
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TD.Stop();
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}
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/****************************************************************************************************************/
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/****************************************************************************************************************/
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// Paso Double Smoothing
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/****************************************************************************************************************/
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/****************************************************************************************************************/
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// Classi di info
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template<class FLT>
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class PDVertInfo
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{
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public:
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Point3<FLT> np;
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};
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template<class FLT>
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class PDFaceInfo
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{
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public:
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Point3<FLT> m;
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};
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/***************************************************************************/
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// Paso Doble Step 1 compute the smoothed normals
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/***************************************************************************/
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// Calcola la normale media per ogni faccia come area weighted mean con tutte
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// le facce adiacenti anche per vertice
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//
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template<class MESH_TYPE>
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void NormalSmooth(MESH_TYPE &m,
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SimpleTempData<typename MESH_TYPE::FaceContainer,PDFaceInfo< typename MESH_TYPE::ScalarType > > &TD,
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float sigma)
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{
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int i;
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//vcg::face::Pos<typename MESH_TYPE::FaceType> ep;
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vcg::face::VFIterator<typename MESH_TYPE::FaceType> ep;
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MESH_TYPE::FaceIterator fi;
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for(fi=m.face.begin();fi!=m.face.end();++fi)
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{
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Point3f bc=(*fi).Barycenter();
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for(i=0;i<3;++i)
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{
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ep.f=(*fi).V(i)->VFp();
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ep.z=(*fi).V(i)->VFi();
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while (!ep.End())
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{
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ep.f->ClearS();
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ep++;
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}
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}
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//TD[*fi]->SetV();
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(*fi).SetS();
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Point3f mm=Point3f(0,0,0);
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for(i=0;i<3;++i)
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{
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ep.f=(*fi).V(i)->VFp();
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ep.z=(*fi).V(i)->VFi();
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while (!ep.End())
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{
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//if(!TD[*(ep.f)]->IsV())
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if(! (*ep.f).IsS() )
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{
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if(sigma>0)
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{
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float dd=SquaredDistance(ep.f->Barycenter(),bc);
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float ang=Angle(ep.f->N(),(*fi).N());
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mm+=ep.f->N()*exp(-sigma*ang*ang/dd);
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}
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else mm+=ep.f->N();
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//TD[*(ep.f)]->SetV();
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(*ep.f).SetS();
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}
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ep++;
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}
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}
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mm.Normalize();
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TD[*fi].m=mm;
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}
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}
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/****************************************************************************************************************/
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// Restituisce il gradiente dell'area del triangolo nel punto p.
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// Nota che dovrebbe essere sempre un vettore che giace nel piano del triangolo e perpendicolare al lato opposto al vertice p.
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// Ottimizzato con Maple e poi pesantemente a mano.
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template <class FLT>
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Point3<FLT> TriAreaGradient(Point3<FLT> &p,Point3<FLT> &p0,Point3<FLT> &p1)
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{
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Point3<FLT> dd = p1-p0;
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Point3<FLT> d0 = p-p0;
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Point3<FLT> d1 = p-p1;
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Point3<FLT> grad;
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FLT t16 = d0[1]* d1[2] - d0[2]* d1[1];
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FLT t5 = -d0[2]* d1[0] + d0[0]* d1[2];
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FLT t4 = -d0[0]* d1[1] + d0[1]* d1[0];
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FLT delta= sqrtf(t4*t4 + t5*t5 +t16*t16);
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grad[0]= (t5 * (-dd[2]) + t4 * ( dd[1]))/delta;
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grad[1]= (t16 * (-dd[2]) + t4 * (-dd[0]))/delta;
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grad[2]= (t16 * ( dd[1]) + t5 * ( dd[0]))/delta;
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return grad;
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}
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template <class FLT>
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Point3<FLT> CrossProdGradient(Point3<FLT> &p,Point3<FLT> &p0,Point3<FLT> &p1, Point3<FLT> &m)
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{
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Point3<FLT> grad;
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grad[0] = (-p0[2] + p1[2])*m[1] + (-p1[1] + p0[1])*m[2];
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grad[1] = (-p1[2] + p0[2])*m[0] + (-p0[0] + p1[0])*m[2];
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grad[2] = (-p0[1] + p1[1])*m[0] + (-p1[0] + p0[0])*m[1];
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return grad;
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}
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/*
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Deve Calcolare il gradiente di
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E(p) = A(p,p0,p1) (n - m)^2 =
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A(...) (2-2nm) =
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(p0-p)^(p1-p)
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2A - 2A * ------------- m =
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2A
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2A - 2 (p0-p)^(p1-p) * m
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*/
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template <class FLT>
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Point3<FLT> FaceErrorGrad(Point3<FLT> &p,Point3<FLT> &p0,Point3<FLT> &p1, Point3<FLT> &m)
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{
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return TriAreaGradient(p,p0,p1) *2.0f
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- CrossProdGradient(p,p0,p1,m) *2.0f ;
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}
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/***************************************************************************/
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// Paso Doble Step 2 Fitta la mesh a un dato insieme di normali
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/***************************************************************************/
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template<class MESH_TYPE>
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void FitMesh(MESH_TYPE &m,
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SimpleTempData<typename MESH_TYPE::VertContainer, PDVertInfo<typename typename MESH_TYPE::ScalarType> > &TDV,
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SimpleTempData<typename MESH_TYPE::FaceContainer, PDFaceInfo<typename typename MESH_TYPE::ScalarType> > &TDF,
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float lambda)
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{
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//vcg::face::Pos<typename MESH_TYPE::FaceType> ep;
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vcg::face::VFIterator<typename MESH_TYPE::FaceType> ep;
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MESH_TYPE::VertexIterator vi;
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for(vi=m.vert.begin();vi!=m.vert.end();++vi)
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{
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Point3f ErrGrad=Point3f(0,0,0);
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ep.f=(*vi).VFp();
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ep.z=(*vi).VFi();
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while (!ep.End())
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{
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ErrGrad+=FaceErrorGrad(ep.f->V(ep.z)->P(),ep.f->V1(ep.z)->P(),ep.f->V2(ep.z)->P(),TDF[ep.f].m);
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ep++;
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}
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TDV[*vi].np=(*vi).P()-ErrGrad*lambda;
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}
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for(vi=m.vert.begin();vi!=m.vert.end();++vi)
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(*vi).P()=TDV[*vi].np;
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}
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/****************************************************************************************************************/
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template<class MESH_TYPE>
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void PasoDobleSmooth(MESH_TYPE &m, int step, typename MESH_TYPE::ScalarType Sigma=0, int FitStep=10, typename MESH_TYPE::ScalarType FitLambda=0.05)
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{
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SimpleTempData< typedef MESH_TYPE::VertContainer, PDVertInfo<MESH_TYPE::ScalarType> > TDV(m.vert);
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SimpleTempData< typedef MESH_TYPE::FaceContainer, PDFaceInfo<MESH_TYPE::ScalarType> > TDF(m.face);
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PDVertInfo<MESH_TYPE::ScalarType> lpzv;
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lpzv.np=typename MESH_TYPE::CoordType(0,0,0);
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PDFaceInfo<MESH_TYPE::ScalarType> lpzf;
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lpzf.m=typename MESH_TYPE::CoordType(0,0,0);
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assert(m.HasVFTopology());
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m.HasVFTopology();
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TDV.Start(lpzv);
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TDF.Start(lpzf);
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for(int j=0;j<step;++j)
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{
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vcg::tri::UpdateNormals<MyMesh>::PerFace(m);
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NormalSmooth<MESH_TYPE>(m,TDF,Sigma);
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for(int k=0;k<FitStep;k++)
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FitMesh<MESH_TYPE>(m,TDV,TDF,FitLambda);
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}
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TDF.Stop();
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TDV.Stop();
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}
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} // End namespace vcg
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#endif // VCG_SMOOTH
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