diff --git a/apps/test/segmentation3d/collision_detection.h b/apps/test/segmentation3d/collision_detection.h
new file mode 100644
index 00000000..0fe55e03
--- /dev/null
+++ b/apps/test/segmentation3d/collision_detection.h
@@ -0,0 +1,131 @@
+#ifndef COLLISION_DETECTION
+#define COLLISION_DETECTION
+
+#include <set>
+#include <vcg/space/index/spatial_hashing.h>
+#include <vcg/space/intersection3.h>
+
+template <class ContSimplex>
+class Collision_Detector{
+
+public:
+	
+		typedef typename ContSimplex::value_type SimplexType;
+		typedef typename ContSimplex::value_type* SimplexPointer;
+		typedef typename ContSimplex::iterator SimplexIterator;
+		typedef typename SimplexType::CoordType Point3x;
+		typedef typename Point3x::ScalarType ScalarType;
+
+		typedef  SpatialHashTable<SimplexType> HashingTable;
+		
+		Collision_Detector(ContSimplex & r_):_simplex(r_){};
+		~Collision_Detector(){};
+
+		ContSimplex & _simplex;
+		
+		HashingTable *HTable;
+		
+		std::set<Point3i> vactive;
+
+		int active;
+
+	//control if two faces share an edge
+	bool ShareEdge(SimplexType *f0,SimplexType *f1)
+	{
+		for (int i=0;i<3;i++)
+				if (f0->FFp(i)==f1)
+					return (true);
+
+		return(false);
+	}
+
+	///initialize the box for collision detection and the dimension of a cell
+	void Init(Point3x _min,Point3x _max,ScalarType _l)
+	{
+		HTable=new HashingTable();
+		HTable->Init(_min,_max,_l);
+	}
+
+	//control if two faces share a vertex
+	bool ShareVertex(SimplexType *f0,SimplexType *f1)
+	{
+		for (int i=0;i<3;i++)
+			for (int j=0;j<3;j++)
+				if (f0->V(i)==f1->V(j))
+					return (true);
+
+		return(false);
+	}
+	
+	//test real intersection between faces
+	bool TestRealIntersection(SimplexType *f0,SimplexType *f1)
+	{
+		
+		if ((!f0->IsActive())&&(!f1->IsActive()))
+			return false;
+		//no adiacent faces
+		if ((f0!=f1)&& (!ShareEdge(f0,f1))
+			&& (!ShareVertex(f0,f1)))
+			return (vcg::Intersection<SimplexType>((*f0),(*f1)));
+		return false;
+	}
+
+	///refresh the elemnt of spatial hashing table 
+	void RefreshElements()
+	{
+		HTable->Clear();
+
+		for (SimplexIterator si=_simplex.begin();si<_simplex.end();++si)
+		{
+			if ((!(*si).IsD())&&(!(*si).IsActive()))
+					HTable->addSimplex(&*si);
+		}
+
+		UpdateStep();
+	}
+	
+	///put active cells on apposite structure
+	void UpdateStep()
+	{
+		vactive.clear();
+		for (SimplexIterator si=_simplex.begin();si<_simplex.end();++si)
+		{
+			if ((((!(*si).IsD()))&&(*si).IsActive()))
+			{
+				std::vector<Point3i> cells=HTable->addSimplex(&*si);
+				for(std::vector<Point3i>::iterator it=cells.begin();it<cells.end();it++)
+					vactive.insert(*it);
+			}
+		}
+	}
+
+	///control the real self intersection in the mesh and returns the elements that intersect with someone
+	std::vector<SimplexType*> computeSelfIntersection()
+	{
+		std::vector<SimplexType*> ret;
+		std::set<Point3i>::iterator act;
+		for (act=vactive.begin();act!=vactive.end();act++)
+				{
+					Point3i p=*act;
+					if (HTable->numElemCell(p)>=2)
+					{
+ 						std::vector<SimplexType*> inCell=HTable->getAtCell(p);
+						int nelem=inCell.size();
+						if (nelem>=2)
+						{
+							//test combinations of elements
+							for (int i=0;i<nelem-1;i++)
+								for (int j=i+1;j<nelem;j++)
+									if ((!inCell[i]->IsD())&&(!inCell[j]->IsD())&&(TestRealIntersection(inCell[i],inCell[j])))
+									{
+										ret.push_back(inCell[i]);
+										ret.push_back(inCell[j]);
+									}
+						}
+					}
+				}
+			return ret;
+	}
+
+};
+#endif
\ No newline at end of file
diff --git a/apps/test/segmentation3d/main.cpp b/apps/test/segmentation3d/main.cpp
new file mode 100644
index 00000000..d89370b0
--- /dev/null
+++ b/apps/test/segmentation3d/main.cpp
@@ -0,0 +1,43 @@
+#include <qapplication.h>
+#include <qimage.h>
+#include <segmentform.h>
+#include <segmentator.h>
+#include <qdir.h>
+#include <qcolor.h>
+#include <SimpleGLWidget.h>
+#include <qtimer.h>
+
+Segmentator *s;
+QTimer *timer;
+
+int main( int argc, char ** argv )
+{
+	//s=new Segmentator();
+
+	//s->LoadFromDir("./venacava/","prova.txt");//to chANGE
+
+	////s->InitSegmentation(0.5,0.2,20,10.f);
+	//
+    QApplication a( argc, argv );
+
+    SegmentForm w;
+    w.show();
+
+	//assign pointer to pricipal form
+	w.simpleGLWidget1->w=&w;
+	
+	s=new Segmentator();
+
+	//s->LoadFromDir("./venacava/","prova.txt");//to chANGE
+
+	//s->InitSegmentation(0.5,0.2,20,10.f);
+	
+
+	timer = new QTimer(w.simpleGLWidget1 );
+	QTimer::connect( timer, SIGNAL(timeout()), w.simpleGLWidget1, SLOT(Update()) );
+    timer->start(0); // 2 seconds single-shot timer
+	
+
+    a.connect( &a, SIGNAL( lastWindowClosed() ), &a, SLOT( quit() ) );
+    return a.exec();
+}
diff --git a/apps/test/segmentation3d/moc_simpleglwidget.cpp b/apps/test/segmentation3d/moc_simpleglwidget.cpp
new file mode 100644
index 00000000..a7369cca
--- /dev/null
+++ b/apps/test/segmentation3d/moc_simpleglwidget.cpp
@@ -0,0 +1,137 @@
+/****************************************************************************
+** SimpleGLWidget meta object code from reading C++ file 'simpleglwidget.h'
+**
+** Created: Fri Dec 17 12:16:05 2004
+**      by: The Qt MOC ($Id: moc_simpleglwidget.cpp,v 1.1 2004-12-17 11:17:36 pietroni Exp $)
+**
+** WARNING! All changes made in this file will be lost!
+*****************************************************************************/
+
+#undef QT_NO_COMPAT
+#include "simpleglwidget.h"
+#include <qmetaobject.h>
+#include <qapplication.h>
+
+#include <private/qucomextra_p.h>
+#if !defined(Q_MOC_OUTPUT_REVISION) || (Q_MOC_OUTPUT_REVISION != 26)
+#error "This file was generated using the moc from 3.3.2. It"
+#error "cannot be used with the include files from this version of Qt."
+#error "(The moc has changed too much.)"
+#endif
+
+const char *SimpleGLWidget::className() const
+{
+    return "SimpleGLWidget";
+}
+
+QMetaObject *SimpleGLWidget::metaObj = 0;
+static QMetaObjectCleanUp cleanUp_SimpleGLWidget( "SimpleGLWidget", &SimpleGLWidget::staticMetaObject );
+
+#ifndef QT_NO_TRANSLATION
+QString SimpleGLWidget::tr( const char *s, const char *c )
+{
+    if ( qApp )
+	return qApp->translate( "SimpleGLWidget", s, c, QApplication::DefaultCodec );
+    else
+	return QString::fromLatin1( s );
+}
+#ifndef QT_NO_TRANSLATION_UTF8
+QString SimpleGLWidget::trUtf8( const char *s, const char *c )
+{
+    if ( qApp )
+	return qApp->translate( "SimpleGLWidget", s, c, QApplication::UnicodeUTF8 );
+    else
+	return QString::fromUtf8( s );
+}
+#endif // QT_NO_TRANSLATION_UTF8
+
+#endif // QT_NO_TRANSLATION
+
+QMetaObject* SimpleGLWidget::staticMetaObject()
+{
+    if ( metaObj )
+	return metaObj;
+    QMetaObject* parentObject = QGLWidget::staticMetaObject();
+    static const QUMethod slot_0 = {"Open", 0, 0 };
+    static const QUMethod slot_1 = {"ShowSlides", 0, 0 };
+    static const QUMethod slot_2 = {"SetWire", 0, 0 };
+    static const QUMethod slot_3 = {"SetShowBlocked", 0, 0 };
+    static const QUMethod slot_4 = {"ShowExternalForces", 0, 0 };
+    static const QUMethod slot_5 = {"ShowInternalForces", 0, 0 };
+    static const QUMethod slot_6 = {"ShowResultForces", 0, 0 };
+    static const QUMethod slot_7 = {"Smooth", 0, 0 };
+    static const QUMethod slot_8 = {"SavePly", 0, 0 };
+    static const QUMethod slot_9 = {"Apply", 0, 0 };
+    static const QUMethod slot_10 = {"Extract", 0, 0 };
+    static const QUMethod slot_11 = {"Update", 0, 0 };
+    static const QUMethod slot_12 = {"Clear", 0, 0 };
+    static const QMetaData slot_tbl[] = {
+	{ "Open()", &slot_0, QMetaData::Public },
+	{ "ShowSlides()", &slot_1, QMetaData::Public },
+	{ "SetWire()", &slot_2, QMetaData::Public },
+	{ "SetShowBlocked()", &slot_3, QMetaData::Public },
+	{ "ShowExternalForces()", &slot_4, QMetaData::Public },
+	{ "ShowInternalForces()", &slot_5, QMetaData::Public },
+	{ "ShowResultForces()", &slot_6, QMetaData::Public },
+	{ "Smooth()", &slot_7, QMetaData::Public },
+	{ "SavePly()", &slot_8, QMetaData::Public },
+	{ "Apply()", &slot_9, QMetaData::Public },
+	{ "Extract()", &slot_10, QMetaData::Public },
+	{ "Update()", &slot_11, QMetaData::Public },
+	{ "Clear()", &slot_12, QMetaData::Public }
+    };
+    metaObj = QMetaObject::new_metaobject(
+	"SimpleGLWidget", parentObject,
+	slot_tbl, 13,
+	0, 0,
+#ifndef QT_NO_PROPERTIES
+	0, 0,
+	0, 0,
+#endif // QT_NO_PROPERTIES
+	0, 0 );
+    cleanUp_SimpleGLWidget.setMetaObject( metaObj );
+    return metaObj;
+}
+
+void* SimpleGLWidget::qt_cast( const char* clname )
+{
+    if ( !qstrcmp( clname, "SimpleGLWidget" ) )
+	return this;
+    return QGLWidget::qt_cast( clname );
+}
+
+bool SimpleGLWidget::qt_invoke( int _id, QUObject* _o )
+{
+    switch ( _id - staticMetaObject()->slotOffset() ) {
+    case 0: Open(); break;
+    case 1: ShowSlides(); break;
+    case 2: SetWire(); break;
+    case 3: SetShowBlocked(); break;
+    case 4: ShowExternalForces(); break;
+    case 5: ShowInternalForces(); break;
+    case 6: ShowResultForces(); break;
+    case 7: Smooth(); break;
+    case 8: SavePly(); break;
+    case 9: Apply(); break;
+    case 10: Extract(); break;
+    case 11: Update(); break;
+    case 12: Clear(); break;
+    default:
+	return QGLWidget::qt_invoke( _id, _o );
+    }
+    return TRUE;
+}
+
+bool SimpleGLWidget::qt_emit( int _id, QUObject* _o )
+{
+    return QGLWidget::qt_emit(_id,_o);
+}
+#ifndef QT_NO_PROPERTIES
+
+bool SimpleGLWidget::qt_property( int id, int f, QVariant* v)
+{
+    return QGLWidget::qt_property( id, f, v);
+}
+
+bool SimpleGLWidget::qt_static_property( QObject* , int , int , QVariant* ){ return FALSE; }
+#endif // QT_NO_PROPERTIES
diff --git a/apps/test/segmentation3d/partial_container.h b/apps/test/segmentation3d/partial_container.h
new file mode 100644
index 00000000..93fd0651
--- /dev/null
+++ b/apps/test/segmentation3d/partial_container.h
@@ -0,0 +1,53 @@
+#ifndef __PARTIALCONT__
+#define __PARTIALCONT__
+
+#include<vector>
+
+template <class STL_CONT, class ELEM> 
+struct Partial_Container : STL_CONT
+{
+	
+	
+	typedef typename STL_CONT::iterator ite_father;
+
+	typedef ELEM value_type;
+
+public:
+struct iterator{
+
+		ite_father i;
+		iterator (){}
+		iterator (ite_father i_):i(i_){}
+
+		ELEM &operator *(){return *(*i);}
+
+		void operator ++()
+		{
+			///((i!=(STL_CONT::end()))&& da controllare la fine
+			//while ((*i)->IsInvalid())++i;
+			++i;
+		}
+
+		iterator operator =(const iterator & oth){
+				i=oth.i;
+				return *this;
+			}
+
+		bool operator ==(const iterator & oth){
+			return (i==oth.i);
+			}
+		bool operator !=(const iterator & oth){
+			return (i!=oth.i);
+			}
+
+		bool operator <(const iterator & oth){
+			return (i<oth.i);
+			}
+		};
+	
+	Partial_Container(){};
+	iterator  begin(){return iterator(STL_CONT::begin());}
+	iterator  end(){return iterator(STL_CONT::end());}
+
+};
+#endif
\ No newline at end of file
diff --git a/apps/test/segmentation3d/segmentation.pro b/apps/test/segmentation3d/segmentation.pro
new file mode 100644
index 00000000..f6dd6e53
--- /dev/null
+++ b/apps/test/segmentation3d/segmentation.pro
@@ -0,0 +1,245 @@
+TEMPLATE	= app
+LANGUAGE	= C++
+
+CONFIG	+= qt warn_on release
+
+
+HEADERS	+= D:/sf/apps/test/segmentation3d/simpleglwidget.h
+SOURCES	+= main.cpp \
+	D:/sf/apps/test/segmentation3d/simpleglwidget.cpp
+FORMS	= segmentform.ui \
+	d:\segmentation\segmentform.ui
+
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+unix {
+  UI_DIR = .ui
+  MOC_DIR = .moc
+  OBJECTS_DIR = .obj
+}
+
+
diff --git a/apps/test/segmentation3d/segmentator.h b/apps/test/segmentation3d/segmentator.h
new file mode 100644
index 00000000..4f710dd6
--- /dev/null
+++ b/apps/test/segmentation3d/segmentator.h
@@ -0,0 +1,736 @@
+#ifndef SEGMENTATOR
+#define SEGMENTATOR
+
+//#include <vcg/simplex/vertex/with/afvn.h>
+//#include <vcg/simplex/face/with/afav.h>
+
+#include <vcg/simplex/vertex/with/vn.h>
+#include <vcg/simplex/face/with/af.h>
+
+#include <sim/particle/with/basic_physics.h>
+#include <sim/methods/mass_spring/triangle.h>
+
+
+#include <vcg/complex/trimesh/base.h>
+#include <vcg/complex/trimesh/allocate.h>
+#include <vcg/complex/trimesh/update/topology.h>
+#include <vcg/complex/trimesh/update/normal.h>
+
+#include <vcg/complex/trimesh/refine.h>
+#include <vcg/complex/trimesh/platonic.h>
+#include <volume_dataset.h>
+
+//#include <vcg/simplex/face/pos.h>
+
+
+#include <vcg/space/point3.h>
+#include <vcg/space/box3.h>
+
+#include <sim/pde_integrator.h>
+#include <partial_container.h>
+#include <vector>
+#include <time.h>
+#include <math.h>
+#include <collision_detection.h>
+#include <vcg/complex/trimesh/smooth.h>
+
+class Segmentator{
+	
+public:
+
+struct DummyEdge;
+struct DummyTetra;
+struct MyFace;
+
+struct MyVertex: public ParticleBasic<vcg::VertexVNf<DummyEdge,MyFace,DummyTetra> >
+{
+public:
+
+	bool blocked;//optimize after with vertex flags
+	bool stopped;
+
+	MyVertex()
+	{
+		blocked=false;
+		stopped=false;
+		Acc()=Point3f(0,0,0);
+		Vel()=Point3f(0,0,0);
+		//neeed call of the super class
+	}
+
+	void UpdateAcceleration()
+	{
+		//if ((!IsBlocked(this))&&(!IsStopped(this)))
+		if ((!blocked)&&(!stopped))
+		{
+			Acc()=(IntForce()+ExtForce())/Mass();
+		}
+		else
+		{
+			Acc()=Point3f(0,0,0);
+			Vel()=Point3f(0,0,0);
+		}
+	}
+	
+	void Reset()
+	{
+		IntForce()=Point3f(0.f,0.f,0.f);
+	}
+
+
+
+};
+
+///this class implements the deformable triangle in a mass spring system
+struct MyFace : public TriangleMassSpring< vcg::FaceAF<MyVertex,DummyEdge,MyFace> >
+{
+public:
+	bool intersected;
+	float kdihedral;
+
+	MyFace()
+	{
+		intersected=false;
+	}
+
+	void Init ( double k, double  mass,float k_dihedral )
+	{ 
+		__super::Init(k,mass);
+		kdihedral=k_dihedral;
+	}
+
+	bool IsActive()
+	{
+		return(!(((V(0)->blocked)||(V(0)->stopped))&&
+			  ((V(1)->blocked)||(V(1)->stopped))&&
+			  ((V(2)->blocked)||(V(2)->stopped))));
+	}
+
+	bool IsBlocked()
+	{
+	return((V(0)->blocked)&&(V(1)->blocked)&&(V(2)->blocked));
+	}
+	
+		
+	double DiedralAngle(int edge)
+	{
+		MyFace *fopp=FFp(edge);
+		CoordType norm1=NormalizedNormal();
+		CoordType norm2=fopp->NormalizedNormal();
+		return (NormalizedNormal()*fopp->NormalizedNormal());
+	}
+
+	///update of the internal forces using the dihedral angle
+	bool Update ( void )	
+	{
+		for (int i=0;i<3;i++)
+		{
+			MyFace *fopp=FFp(i);
+			MyFace *myAddr=fopp->FFp(FFi(i));
+			if ((fopp!=0)||(fopp<myAddr))//test do not duplicate updates per edge
+			{
+				//normal and area based diadedral angle calcolus
+				CoordType DirEdge=(V(i)->P()-V((i+1)%3)->P()).Normalize();
+				fopp=FFp(i);
+				CoordType Ver=(NormalizedNormal()^fopp->NormalizedNormal()).Normalize();
+				ScalarType diaedral=DiedralAngle(i);
+
+				if ((Ver*DirEdge)<=0)///convex
+				{
+					ScalarType Force=(((-diaedral)+1.f)*kdihedral);
+					V((i+2)%3)->IntForce()+=NormalizedNormal()*(Force);
+					V(i)->IntForce()-=NormalizedNormal()*(Force)/2.f;
+					V((i+1)%3)->IntForce()-=NormalizedNormal()*(Force)/2.f;
+				}
+				else	///non-convex
+				{
+					ScalarType Force=(((-diaedral)+1.f)*kdihedral);
+					V((i+2)%3)->IntForce()-=NormalizedNormal()*(Force);
+					V(i)->IntForce()+=NormalizedNormal()*(Force)/2.f;
+					V((i+1)%3)->IntForce()+=NormalizedNormal()*(Force)/2.f;
+				}
+			}
+		}
+		return(__super::Update());
+	}
+};
+
+struct MyTriMesh: public vcg::tri::TriMesh<std::vector<MyVertex>,std::vector<MyFace> >{};
+
+typedef  Partial_Container<std::vector<MyVertex*>,MyVertex> Part_VertexContainer;
+typedef  Partial_Container<std::vector<MyFace*>,MyFace> Part_FaceContainer;
+typedef  PDEIntegrator<Part_FaceContainer,Part_VertexContainer,float> myIntegrator;
+typedef	 Collision_Detector<std::vector<MyFace> > Collision;
+
+
+public:
+	Point3f scale;
+	
+	//VolumetricDataset<int> d;
+	MyTriMesh m;
+	Part_FaceContainer P_Faces;
+	Part_VertexContainer P_Vertex;
+	Part_VertexContainer V_Stopped;
+	myIntegrator *TrINT;
+	
+	MyTriMesh::CoordType InitialBarycenter;
+	
+	float mass;
+	float k_elanst;
+	float k_dihedral;
+	float edge_size;
+	int tolerance;
+	int gray_init;
+	float time_stamp;
+	float edge_precision;
+
+	bool end_loop;
+	bool refined;
+
+	clock_t interval_reinit;
+	clock_t interval_selfcollision;
+
+	Collision *CollDet;
+
+	//Volume_Dataset_Optimized<short> V;
+	Volume_Dataset <short> V;
+
+	vcg::Box3<float>  bbox;
+
+	char *inDir;
+	char *outDir;
+
+	//attention static members
+	/*int BlockFlag;
+	int StoppedFlag;*/
+
+	Segmentator()
+	{
+		CollDet=new Collision(m.face);
+	}
+
+	~Segmentator()
+	{
+	}
+
+private:
+
+	/////return integer coordinete in volumetric dataset
+	//Point3i MapToDataset(MyTriMesh::CoordType p)
+	//{
+	//	MyTriMesh::ScalarType x=((MyTriMesh::ScalarType)p.V(0));
+	//	MyTriMesh::ScalarType y=((MyTriMesh::ScalarType)p.V(1));
+	//	MyTriMesh::ScalarType z=((MyTriMesh::ScalarType)p.V(2));
+	//	return Point3i((int)p.V(0),(int)p.V(1),(int)p.V(2));
+	//}
+	//
+
+	///map to space coordinate from dataset coordinates
+	MyTriMesh::CoordType MapToSpace(Point3i p)
+	{
+		MyTriMesh::ScalarType x=((MyTriMesh::ScalarType)p.V(0));
+		MyTriMesh::ScalarType y=((MyTriMesh::ScalarType)p.V(1));
+		MyTriMesh::ScalarType z=((MyTriMesh::ScalarType)p.V(2));
+		return (MyTriMesh::CoordType(x,y,z));
+	}
+
+	///return integer coordinete in volumetric dataset
+	float getColor(MyTriMesh::CoordType p)
+	{
+		
+		float lx=p.V(0)-(int)p.V(0);//da rivedere bene per lo scale
+		float ly=p.V(1)-(int)p.V(1);//da rivedere bene per lo scale
+		float lz=p.V(2)-(int)p.V(2);//da rivedere bene per lo scale
+
+		Point3i base=Point3i((int)p.V(0),(int)p.V(1),(int)p.V(2));
+				
+		float v[8];
+		Point3i px;
+		for (int i=0;i<8;i++)
+		{
+			px=base+Point3i((i%2),(i/4),((i/2)%2));
+			v[i]=(float)V.getAt(px);
+		}
+
+		float color=lx*v[1]+v[0]+lz*v[0]*lx-v[0]*lx-ly*v[0]+ly*v[2]-lz*v[0]+ly*v[0]*lx-ly*lx*v[1]-ly*v[2]*lx
+		-lz*ly*v[0]*lx+lz*ly*lx*v[1]+lz*ly*v[2]*lx-lz*ly*lx*v[3]+lz*ly*lx*v[4]-lz*ly*lx*v[5]-lz*ly*
+		v[6]*lx+lz*ly*lx*v[7]+ly*lx*v[3]-lz*lx*v[1]+lz*ly*v[0]-lz*ly*v[2]-lz*lx*v[4]+lz*lx*v[5]-lz*ly*
+		v[4]+lz*ly*v[6]+lz*v[4];
+
+		return color;
+	}
+	
+	///maximixe the gradient of the movement
+	MyTriMesh::CoordType Gradient(MyTriMesh::CoordType p,float h=0.01f)
+	{
+		float value=getColor(p);
+		MyTriMesh::CoordType h0=MyTriMesh::CoordType(h,0,0);
+		MyTriMesh::CoordType h1=MyTriMesh::CoordType(0,h,0);
+		MyTriMesh::CoordType h2=MyTriMesh::CoordType(0,0,h);
+		float dx=(getColor(p+h0)-value)/h;
+
+		/*dx=v[1]+lz*v[0]-v[0]*lx+ly*v[0]-ly*v[1]-ly*v[2]
+		-lz*ly*v[0]+lz*ly*v[1]+lz*ly*v[2]-lz*ly*v[3]+lz*ly*v[4]-lz*ly*v[5]-lz*ly*
+		v[6]+lz*ly*v[7]+ly*v[3]-lz*v[1]-lz*v[4]+lz*v[5]-lz*ly*v[4]+lz*ly*v[6]+lz*v[4];
+		
+		dy=-v[0]+v[2]+v[0]*lx-lx*v[1]-v[2]*lx
+		-lz*v[0]*lx+lz*lx*v[1]+lz*v[2]*lx-lz*lx*v[3]+lz*lx*v[4]-lz*lx*v[5]-lz*v[6]*lx+lz*ly*lx*v[7]+ly*lx*v[3]-lz*lx*v[1]+lz*ly*v[0]-lz*ly*v[2]-lz*lx*v[4]+lz*lx*v[5]-lz*ly*
+		v[4]+lz*ly*v[6]+lz*v[4];*/
+
+		float dy=(getColor(p+h1)-value)/h;
+		float dz=(getColor(p+h2)-value)/h;
+		MyTriMesh::CoordType ret=MyTriMesh::CoordType(dx,dy,dz);
+		return (ret);
+	}
+
+	///scale the coordinates of a point
+	MyTriMesh::CoordType Scale(MyTriMesh::CoordType p)
+	{
+		MyTriMesh::ScalarType x=(p.V(0))/scale.V(0);
+		MyTriMesh::ScalarType y=(p.V(1))/scale.V(1);
+		MyTriMesh::ScalarType z=(p.V(2))/scale.V(2);
+		return (MyTriMesh::CoordType(x,y,z));
+	}
+
+	///return true if a coordinate is out of limits
+	bool OutOfLimits(MyTriMesh::CoordType p)
+	{
+		Point3f max=Scale(MapToSpace(V.Max()));
+		Point3f min=Scale(MapToSpace(V.Min()));
+		Point3f test=(Scale(p));
+		
+		for (int i=0;i<3;i++)
+		{
+			if(((test.V(i)>=max.V(i))||(test.V(i)<=min.V(i))))
+				return true;
+		}
+		return false;
+	}
+	
+	
+	bool IsBlocked(MyVertex *v)
+	{
+		//return ((v->Flags()& BlockFlag!=0));
+		return (v->blocked);
+	}
+
+	void SetBlocked(MyVertex *v)
+	{
+		//v->Flags()|= BlockFlag;
+		v->blocked=true;
+		//v->SetS();//for refine
+	}
+
+	void SetBlockedFace(MyFace *f)
+	{
+		SetBlocked(f->V(0));
+		SetBlocked(f->V(1));
+		SetBlocked(f->V(2));
+	}
+
+	void SetIntersectedFace(MyFace *f)
+	{
+		f->intersected=true;
+	}
+
+	bool IsStopped(MyVertex *v)
+	{
+		//return ((v->Flags()& StoppedFlag!=0));
+		return (v->stopped);
+	}
+
+	void SetStopped(MyVertex *v)
+	{
+		//v->Flags()|= StoppedFlag;
+		v->stopped=true;
+		V_Stopped.push_back(v);
+	}
+
+	void ClearStopped(MyVertex *v)
+	{
+		//v->Flags()&= ~StoppedFlag;
+		v->stopped=false;
+	}
+
+///re-set physical pararmeters on the mesh
+void InitPhysParam(float k_elanst,float mass,float k_dihedral)
+{
+	for (unsigned int i=0;i<m.face.size();i++)
+		{
+			m.face[i].Init(k_elanst,mass,k_dihedral);
+		}
+}
+
+///set the initial mesh of deformable object
+void InitMesh(MyTriMesh &m)
+	{
+		m.Clear();
+		
+		vcg::tri::Icosahedron<MyTriMesh>(m);
+
+		vcg::tri::UpdateTopology<MyTriMesh>::FaceFace(m);
+		
+	/*	P_Vertex.clear();
+		P_Faces.clear();*/
+		
+		for (unsigned int i=0;i<m.vert.size();i++)
+		{
+			m.vert[i].P()+=InitialBarycenter;
+		//	P_Vertex.push_back(&m.vert[i]);
+		}
+		
+		
+		vcg::tri::UpdateNormals<MyTriMesh>::PerVertexNormalized(m);
+	}
+
+
+///return true if the gray level of the vertex v differ from graylevel less than tolerance
+bool InTolerance(MyTriMesh::VertexType *v)
+{
+	return (abs(getColor(v->P())-gray_init)<tolerance);
+}
+
+///add to the vertex v a containing force basing on diffence from tolerance 
+MyTriMesh::CoordType ContainingForce(MyTriMesh::VertexType *v)
+{
+	//float dinstance=fabs((FindGrayMedia(v))-gray_init);
+	float dinstance=fabs((getColor(v->P()))-(float)gray_init);
+	assert(dinstance<=tolerance);
+	MyTriMesh::CoordType ret=(-v->N()*((dinstance)/(float)tolerance));
+	return (ret);
+}
+
+///find the gradient factor
+MyTriMesh::CoordType GradientFactor(MyTriMesh::VertexType *v)
+{
+	MyTriMesh::CoordType value=Gradient(v->P());
+	/*float d0=getColor(v->P()+value);
+	float d1=getColor(v->P()-value);
+	if ((fabs(d0-(float)gray_init))>(fabs(d1-(float)gray_init)))
+		return (-value);
+	else */
+	return (value*(gray_init-getColor(v->P())));
+}
+
+///add the external forces to the deformable mesh
+void AddExtForces()
+{
+	Part_VertexContainer::iterator vi;
+
+	end_loop=true;
+	for (vi=P_Vertex.begin();vi<P_Vertex.end();++vi)
+	{
+		
+		if (!(*vi).IsD())
+		{
+			if (OutOfLimits((*vi).P()))
+				//vi->blocked=true;
+				SetBlocked(&*vi);
+			if ((!IsBlocked(&*vi))&&(!IsStopped(&*vi)))
+			{
+				end_loop=false;
+				if (!InTolerance(&*vi))
+				{
+					SetBlocked(&*vi);
+					(*vi).ExtForce()=MyTriMesh::CoordType(0,0,0);
+				}
+				else
+				{
+					MyTriMesh::CoordType Inflating=(*vi).N();
+					MyTriMesh::CoordType Containing0=ContainingForce(&*vi);	
+					//MyTriMesh::CoordType Containing1=GradientFactor(&*vi);
+					(*vi).ExtForce()=Inflating+Containing0*0.75;/*+Containing1+Containing0*/;
+				}
+			}
+			else
+				(*vi).ExtForce()=MyTriMesh::CoordType(0,0,0);
+		}
+	}
+}
+
+///reinit the partial integration vectors that describe active vertices
+void Reinit_PVectors()
+{
+	V_Stopped.clear();
+    P_Vertex.clear();
+	MyTriMesh::VertexIterator vi;
+
+	for (vi=m.vert.begin();vi<m.vert.end();vi++)
+	{
+		if ((!vi->IsD())&&(!vi->blocked))
+			P_Vertex.push_back(&(*vi));	
+		if ((!vi->IsD())&&((*vi).stopped)&&(!vi->blocked))
+			V_Stopped.push_back(&(*vi));		
+	}
+
+	P_Faces.clear();
+	MyTriMesh::FaceIterator fi;
+	for (fi=m.face.begin();fi<m.face.end();fi++)
+	{
+		//if ((!fi->IsBlocked()))
+		if ((!fi->IsD())&&(!fi->IsBlocked()))
+			P_Faces.push_back(&(*fi));
+	}
+}
+
+///erase the stopped entities from the partial containers
+void Refresh_PVectors()
+{
+	Part_FaceContainer P_FacesAux;
+	Part_VertexContainer P_VertexAux;
+	P_FacesAux.clear();
+	P_VertexAux.clear();
+	
+	int i=0;
+	for (i=0;i<P_Vertex.size();i++)
+	{
+		if (!P_Vertex[i]->blocked)
+			P_VertexAux.push_back(P_Vertex[i]);
+	}
+
+	for (i=0;i<P_Faces.size();i++)
+	{
+		if (!P_Faces[i]->IsBlocked())
+			P_FacesAux.push_back(P_Faces[i]);
+	}
+
+	P_Faces.clear();
+	P_Vertex.clear();
+
+	P_Faces=P_FacesAux;
+	P_Vertex=P_VertexAux;
+}
+
+///add the new elements on partial vectors when allocate space for new vertices
+void AddNewElements(MyTriMesh::VertexIterator vi,MyTriMesh::FaceIterator fi)
+{
+	while (vi!=m.vert.end())
+	{
+		if (!(*vi).IsD())
+			P_Vertex.push_back(&(*vi));
+		vi++;
+	}
+	while (fi!=m.face.end())
+	{
+		if (!(*fi).IsD())
+			P_Faces.push_back(&(*fi));
+		fi++;
+	}
+}
+
+///verify and eventually stop the vertices of the mesh
+void VerifyForces()
+{
+	float proj;
+	Part_VertexContainer::iterator vi;
+	for (vi=P_Vertex.begin();vi<P_Vertex.end();++vi)
+	{
+	 if (!IsStopped(&*vi))
+	 {
+		MyTriMesh::CoordType accn=(*vi).Acc();
+		proj=accn*(*vi).N();
+		if  ((proj)<=0)
+			SetStopped(&*vi);
+	 }
+	}
+}
+
+bool TimeReinit()
+{
+	static clock_t time=0;
+	clock_t elapsedsecs=abs(time-clock());
+	if (elapsedsecs>interval_reinit)
+	{
+		time=clock();
+		return true;
+	}
+	return false;
+}
+
+bool TimeSelfIntersection()
+{
+	static clock_t time=0;
+	clock_t elapsedsecs=abs(time-clock());
+	if (elapsedsecs>interval_selfcollision)
+	{
+		time=clock();
+		return true;
+	}
+	return false;
+}
+
+///refine the mesh and re-update eventually 
+void RefineStep(float _edge_size)
+{
+	MyTriMesh::VertexIterator vinit=m.vert.begin();
+	MyTriMesh::FaceIterator finit=m.face.begin();
+	MyTriMesh::VertexIterator vend=m.vert.end();
+	MyTriMesh::FaceIterator fend=m.face.end();
+
+	refined=vcg::Refine(m,MidPoint<MyTriMesh>(),_edge_size);
+	
+	if (refined)
+	{
+		MyTriMesh::VertexIterator vinit2=m.vert.begin();
+		MyTriMesh::FaceIterator finit2=m.face.begin();
+
+		if ((vinit2!=vinit)||(finit2!=finit))
+			Reinit_PVectors();
+		else
+			AddNewElements(vend,fend);
+
+		vcg::tri::UpdateNormals<MyTriMesh>::PerVertexNormalized(m);
+		CollDet->RefreshElements();
+	}
+}
+
+///reset vertex position and unblock them
+void ReinitPhysicMesh()
+{
+	Part_FaceContainer::iterator pfi;
+
+	for (pfi=P_Faces.begin();pfi<P_Faces.end();++pfi)
+		(*pfi).Init(k_elanst,mass,k_dihedral);
+
+	/*for (MyTriMesh::VertexIterator vi=m.vert.begin();vi<m.vert.end();vi++)
+		ClearStopped(&*vi);*/
+}
+
+///clear the stopped vertex
+void ClearStopped()
+{
+//for (MyTriMesh::VertexIterator vi=m.vert.begin();vi<m.vert.end();vi++)
+//		ClearStopped(&*vi);
+
+	Part_VertexContainer::iterator vi;
+	for (vi=V_Stopped.begin();vi<V_Stopped.end();++vi)
+	{
+		ClearStopped(&*vi);
+	}
+	V_Stopped.clear();
+}
+
+///do one step of controls for self collision detetction
+void CollisionDetection()
+{
+	CollDet->UpdateStep();
+	std::vector<MyFace*> coll=CollDet->computeSelfIntersection();
+	for (std::vector<MyFace*>::iterator it=coll.begin();it<coll.end();it++)
+	{
+		SetBlockedFace(*it);
+		SetIntersectedFace(*it);
+	}
+}
+
+public:
+
+///set the initial barycenter where the triangle mesh start to expand
+void SetInitialBarycenter(MyTriMesh::CoordType b)
+{
+	InitialBarycenter=b;
+	gray_init=getColor(b);
+	InitMesh(m);
+}
+
+///set the input output directory of images
+void LoadFromDir(char *in, char *out)
+{
+	inDir=in;
+	outDir=out;
+	//caso optimized
+	/*V.Resample(inDir,outDir);
+
+	V.Init(1000,outDir);*/
+	V.Load(inDir);
+	bbox=vcg::Box3<float>(MapToSpace(V.Min()),MapToSpace(V.Max()));
+}
+
+
+///init the segmentation of the mesh
+void InitSegmentation(int color,int tol,float Mass=0.5f,float K_elanst=0.2f,float Dihedral=0.2f,float Time_stamp=0.2f,
+					  float Edge_precision=4.f,clock_t _interval=1000,clock_t _interval2=250,
+					  MyTriMesh::CoordType ScaleFactor=MyTriMesh::CoordType(1.f,1.f,1.f) )
+{
+	mass=Mass;
+	k_elanst=K_elanst;
+	tolerance=tol;
+
+	interval_reinit=_interval;
+	interval_selfcollision=_interval2;
+
+	edge_size=16.f;
+	edge_precision=Edge_precision;
+	time_stamp=Time_stamp;
+	k_dihedral=Dihedral;
+	scale=ScaleFactor;
+
+	
+	
+	TrINT= new myIntegrator(P_Faces,P_Vertex);
+	
+	TrINT->SetPDESolver(PDESolvers::EULER_METHOD);
+	
+	////caso optimized
+	///*V.Resample(inDir,outDir);
+
+	//V.Init(1000,outDir);*/
+	//V.Load(inDir);
+	//
+	/*bbox=vcg::Box3<float>(MapToSpace(V.Min()),MapToSpace(V.Max()));*/
+
+	//init the mesh with new 
+	Reinit_PVectors();
+	ReinitPhysicMesh();
+	
+	CollDet->Init(bbox.min,bbox.max,5.f);
+
+
+}
+
+///return the bounding box of the mesh
+vcg::Box3<float> BBox()
+{
+	return (bbox);
+}
+
+///one step of moving for the deformable object
+void Step(float t,float _edge_size)
+{	
+	if (m.face.size()!=0)
+	{
+		AddExtForces();
+		TrINT->Step(t);
+		VerifyForces();
+		Refresh_PVectors();
+		if (end_loop)
+		{
+			RefineStep(_edge_size);
+			ReinitPhysicMesh();
+			ClearStopped();
+		}
+		if (TimeSelfIntersection())
+			CollisionDetection();
+	}
+}
+
+void Smooth()
+{
+	ScaleLaplacianSmooth<MyTriMesh>(m,2,0.5);
+}
+
+void AutoStep()
+{
+	refined=false;
+	Step(time_stamp,edge_size);
+	//test on 80% of the vertex blocked
+	if ((((float)P_Vertex.size()/(float)m.vn)<0.2)&&(end_loop)&&(!refined)&&(edge_size>edge_precision))
+	{
+				edge_size/=2.f;
+				if (edge_size<edge_precision)
+					edge_size=edge_precision;
+				time_stamp/=2.f;
+	}
+}
+
+};
+#endif
\ No newline at end of file
diff --git a/apps/test/segmentation3d/segmentform.ui b/apps/test/segmentation3d/segmentform.ui
new file mode 100644
index 00000000..42b0c545
--- /dev/null
+++ b/apps/test/segmentation3d/segmentform.ui
@@ -0,0 +1,871 @@
+<!DOCTYPE UI><UI version="3.3" stdsetdef="1">
+<class>SegmentForm</class>
+<widget class="QMainWindow">
+    <property name="name">
+        <cstring>SegmentForm</cstring>
+    </property>
+    <property name="geometry">
+        <rect>
+            <x>0</x>
+            <y>0</y>
+            <width>1232</width>
+            <height>981</height>
+        </rect>
+    </property>
+    <property name="caption">
+        <string>Segmentation</string>
+    </property>
+    <widget class="QButtonGroup">
+        <property name="name">
+            <cstring>buttonGroup1</cstring>
+        </property>
+        <property name="geometry">
+            <rect>
+                <x>10</x>
+                <y>0</y>
+                <width>1030</width>
+                <height>50</height>
+            </rect>
+        </property>
+        <property name="title">
+            <string></string>
+        </property>
+        <widget class="QPushButton">
+            <property name="name">
+                <cstring>SlidesButton</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>10</x>
+                    <y>10</y>
+                    <width>80</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>Slides</string>
+            </property>
+            <property name="toggleButton">
+                <bool>true</bool>
+            </property>
+        </widget>
+        <widget class="QPushButton">
+            <property name="name">
+                <cstring>ResultButton</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>740</x>
+                    <y>10</y>
+                    <width>110</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>ResultForces</string>
+            </property>
+            <property name="toggleButton">
+                <bool>true</bool>
+            </property>
+        </widget>
+        <widget class="QPushButton">
+            <property name="name">
+                <cstring>InternalButton</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>590</x>
+                    <y>10</y>
+                    <width>110</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>InternalForces</string>
+            </property>
+            <property name="toggleButton">
+                <bool>true</bool>
+            </property>
+        </widget>
+        <widget class="QPushButton">
+            <property name="name">
+                <cstring>ExternalButton</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>420</x>
+                    <y>10</y>
+                    <width>120</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>ExternalForces</string>
+            </property>
+            <property name="toggleButton">
+                <bool>true</bool>
+            </property>
+        </widget>
+        <widget class="QPushButton">
+            <property name="name">
+                <cstring>BlockedButton</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>270</x>
+                    <y>10</y>
+                    <width>110</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>BlockedFaces</string>
+            </property>
+            <property name="toggleButton">
+                <bool>true</bool>
+            </property>
+        </widget>
+        <widget class="QPushButton">
+            <property name="name">
+                <cstring>WireButton</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>130</x>
+                    <y>10</y>
+                    <width>100</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>Wire</string>
+            </property>
+            <property name="toggleButton">
+                <bool>true</bool>
+            </property>
+            <property name="on">
+                <bool>true</bool>
+            </property>
+            <property name="default">
+                <bool>true</bool>
+            </property>
+        </widget>
+    </widget>
+    <widget class="QButtonGroup">
+        <property name="name">
+            <cstring>buttonGroup2</cstring>
+        </property>
+        <property name="geometry">
+            <rect>
+                <x>1040</x>
+                <y>0</y>
+                <width>191</width>
+                <height>930</height>
+            </rect>
+        </property>
+        <property name="title">
+            <string></string>
+        </property>
+        <widget class="QPushButton">
+            <property name="name">
+                <cstring>SaveButton</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>560</y>
+                    <width>140</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>SavePly</string>
+            </property>
+        </widget>
+        <widget class="QPushButton">
+            <property name="name">
+                <cstring>SmoothButton</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>520</y>
+                    <width>140</width>
+                    <height>30</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="cursor">
+                <cursor>1</cursor>
+            </property>
+            <property name="text">
+                <string>Smooth</string>
+            </property>
+        </widget>
+        <widget class="QPushButton">
+            <property name="name">
+                <cstring>SegmentButton</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>480</y>
+                    <width>141</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>Extract</string>
+            </property>
+            <property name="toggleButton">
+                <bool>true</bool>
+            </property>
+        </widget>
+        <widget class="QLineEdit">
+            <property name="name">
+                <cstring>Color</cstring>
+            </property>
+            <property name="enabled">
+                <bool>false</bool>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>390</y>
+                    <width>70</width>
+                    <height>30</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="frameShape">
+                <enum>LineEditPanel</enum>
+            </property>
+            <property name="frameShadow">
+                <enum>Sunken</enum>
+            </property>
+            <property name="text">
+                <string></string>
+            </property>
+            <property name="cursorPosition">
+                <number>0</number>
+            </property>
+        </widget>
+        <widget class="QLabel">
+            <property name="name">
+                <cstring>textLabel1_2_2_2_2</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>370</y>
+                    <width>116</width>
+                    <height>21</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>color</string>
+            </property>
+        </widget>
+        <widget class="QLineEdit">
+            <property name="name">
+                <cstring>Tolerance</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>330</y>
+                    <width>70</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>10</string>
+            </property>
+            <property name="cursorPosition">
+                <number>2</number>
+            </property>
+        </widget>
+        <widget class="QLabel">
+            <property name="name">
+                <cstring>textLabel1_2_2_2</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>310</y>
+                    <width>116</width>
+                    <height>21</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>tolerance</string>
+            </property>
+        </widget>
+        <widget class="QLineEdit">
+            <property name="name">
+                <cstring>E_size</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>270</y>
+                    <width>70</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>4</string>
+            </property>
+            <property name="cursorPosition">
+                <number>1</number>
+            </property>
+        </widget>
+        <widget class="QLabel">
+            <property name="name">
+                <cstring>textLabel1_2_2</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>250</y>
+                    <width>116</width>
+                    <height>21</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>minimum edge size</string>
+            </property>
+        </widget>
+        <widget class="QLineEdit">
+            <property name="name">
+                <cstring>T_step</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>210</y>
+                    <width>70</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>0.2</string>
+            </property>
+            <property name="cursorPosition">
+                <number>3</number>
+            </property>
+        </widget>
+        <widget class="QLabel">
+            <property name="name">
+                <cstring>textLabel1_2</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>190</y>
+                    <width>90</width>
+                    <height>21</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>initial time step</string>
+            </property>
+        </widget>
+        <widget class="QLineEdit">
+            <property name="name">
+                <cstring>D_angle</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>150</y>
+                    <width>70</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>0.2</string>
+            </property>
+            <property name="cursorPosition">
+                <number>3</number>
+            </property>
+        </widget>
+        <widget class="QLabel">
+            <property name="name">
+                <cstring>textLabel1_4</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>130</y>
+                    <width>150</width>
+                    <height>21</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>dihedral angle constant</string>
+            </property>
+        </widget>
+        <widget class="QLineEdit">
+            <property name="name">
+                <cstring>K_elanst</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>90</y>
+                    <width>70</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="frameShape">
+                <enum>LineEditPanel</enum>
+            </property>
+            <property name="frameShadow">
+                <enum>Sunken</enum>
+            </property>
+            <property name="text">
+                <string>0.2</string>
+            </property>
+            <property name="cursorPosition">
+                <number>3</number>
+            </property>
+        </widget>
+        <widget class="QLabel">
+            <property name="name">
+                <cstring>textLabel1</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>70</y>
+                    <width>131</width>
+                    <height>21</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>spring constant</string>
+            </property>
+        </widget>
+        <widget class="QLineEdit">
+            <property name="name">
+                <cstring>M_particles</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>30</y>
+                    <width>70</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="lineWidth">
+                <number>2</number>
+            </property>
+            <property name="text">
+                <string>0.5</string>
+            </property>
+            <property name="cursorPosition">
+                <number>3</number>
+            </property>
+        </widget>
+        <widget class="QLabel">
+            <property name="name">
+                <cstring>textLabel1_3</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>10</y>
+                    <width>131</width>
+                    <height>21</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>mass of particles</string>
+            </property>
+        </widget>
+        <widget class="QPushButton">
+            <property name="name">
+                <cstring>ApplyButton</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>440</y>
+                    <width>141</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>Apply</string>
+            </property>
+        </widget>
+        <widget class="QPushButton">
+            <property name="name">
+                <cstring>ClearButton</cstring>
+            </property>
+            <property name="geometry">
+                <rect>
+                    <x>30</x>
+                    <y>600</y>
+                    <width>141</width>
+                    <height>31</height>
+                </rect>
+            </property>
+            <property name="font">
+                <font>
+                    <pointsize>10</pointsize>
+                </font>
+            </property>
+            <property name="text">
+                <string>Clear</string>
+            </property>
+        </widget>
+    </widget>
+    <widget class="SimpleGLWidget">
+        <property name="name">
+            <cstring>simpleGLWidget1</cstring>
+        </property>
+        <property name="geometry">
+            <rect>
+                <x>10</x>
+                <y>70</y>
+                <width>1030</width>
+                <height>880</height>
+            </rect>
+        </property>
+    </widget>
+</widget>
+<menubar>
+    <property name="name">
+        <cstring>MenuBar</cstring>
+    </property>
+    <item text="&amp;File" name="fileMenu">
+        <action name="fileOpenAction"/>
+        <action name="fileSaveAction"/>
+        <separator/>
+        <separator/>
+        <action name="fileExitAction"/>
+    </item>
+</menubar>
+<toolbars>
+</toolbars>
+<customwidgets>
+    <customwidget>
+        <class>SimpleGLWidget</class>
+        <header location="global">D:/sf/apps/test/segmentation3d/simpleglwidget.h</header>
+        <sizehint>
+            <width>-1</width>
+            <height>-1</height>
+        </sizehint>
+        <container>0</container>
+        <sizepolicy>
+            <hordata>5</hordata>
+            <verdata>5</verdata>
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+        </sizepolicy>
+        <pixmap>image0</pixmap>
+        <slot access="public" specifier="">ShowSlides()</slot>
+        <slot access="public" specifier="">SetWire()</slot>
+        <slot access="public" specifier="">SetShowBlocked()</slot>
+        <slot access="public" specifier="">ShowExternalForces()</slot>
+        <slot access="public" specifier="">ShowInternalForces()</slot>
+        <slot access="public" specifier="">ShowResultForces()</slot>
+        <slot access="public" specifier="">Smooth()</slot>
+        <slot access="public" specifier="">SavePly()</slot>
+        <slot access="public" specifier="">Extract()</slot>
+        <slot access="public" specifier="">Apply()</slot>
+        <slot access="public" specifier="">Clear()</slot>
+        <slot access="public" specifier="">slot()</slot>
+        <slot access="public" specifier="">Open()</slot>
+    </customwidget>
+</customwidgets>
+<actions>
+    <action>
+        <property name="name">
+            <cstring>fileOpenAction</cstring>
+        </property>
+        <property name="on">
+            <bool>false</bool>
+        </property>
+        <property name="iconSet">
+            <iconset></iconset>
+        </property>
+        <property name="text">
+            <string>&amp;Open...</string>
+        </property>
+        <property name="menuText">
+            <string>&amp;Open...</string>
+        </property>
+        <property name="accel">
+            <string>Ctrl+O</string>
+        </property>
+    </action>
+    <action>
+        <property name="name">
+            <cstring>fileSaveAction</cstring>
+        </property>
+        <property name="iconSet">
+            <iconset></iconset>
+        </property>
+        <property name="text">
+            <string>Save</string>
+        </property>
+        <property name="menuText">
+            <string>&amp;Save</string>
+        </property>
+        <property name="accel">
+            <string>Ctrl+S</string>
+        </property>
+    </action>
+    <action>
+        <property name="name">
+            <cstring>Segmentation</cstring>
+        </property>
+        <property name="text">
+            <string>Save As</string>
+        </property>
+        <property name="menuText">
+            <string>Save &amp;As...</string>
+        </property>
+        <property name="accel">
+            <string></string>
+        </property>
+    </action>
+    <action>
+        <property name="name">
+            <cstring>fileExitAction</cstring>
+        </property>
+        <property name="text">
+            <string>Exit</string>
+        </property>
+        <property name="menuText">
+            <string>E&amp;xit</string>
+        </property>
+        <property name="accel">
+            <string></string>
+        </property>
+    </action>
+    <action>
+        <property name="name">
+            <cstring>fileOpennew_itemAction</cstring>
+        </property>
+        <property name="text">
+            <string>new item</string>
+        </property>
+        <property name="menuText">
+            <string>new item</string>
+        </property>
+    </action>
+</actions>
+<images>
+    <image name="image0">
+        <data format="PNG" length="1002">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</data>
+    </image>
+</images>
+<connections>
+    <connection>
+        <sender>SlidesButton</sender>
+        <signal>pressed()</signal>
+        <receiver>simpleGLWidget1</receiver>
+        <slot>ShowSlides()</slot>
+    </connection>
+    <connection>
+        <sender>WireButton</sender>
+        <signal>pressed()</signal>
+        <receiver>simpleGLWidget1</receiver>
+        <slot>SetWire()</slot>
+    </connection>
+    <connection>
+        <sender>BlockedButton</sender>
+        <signal>pressed()</signal>
+        <receiver>simpleGLWidget1</receiver>
+        <slot>SetShowBlocked()</slot>
+    </connection>
+    <connection>
+        <sender>ExternalButton</sender>
+        <signal>pressed()</signal>
+        <receiver>simpleGLWidget1</receiver>
+        <slot>ShowExternalForces()</slot>
+    </connection>
+    <connection>
+        <sender>InternalButton</sender>
+        <signal>pressed()</signal>
+        <receiver>simpleGLWidget1</receiver>
+        <slot>ShowInternalForces()</slot>
+    </connection>
+    <connection>
+        <sender>ResultButton</sender>
+        <signal>pressed()</signal>
+        <receiver>simpleGLWidget1</receiver>
+        <slot>ShowResultForces()</slot>
+    </connection>
+    <connection>
+        <sender>SaveButton</sender>
+        <signal>clicked()</signal>
+        <receiver>simpleGLWidget1</receiver>
+        <slot>SavePly()</slot>
+    </connection>
+    <connection>
+        <sender>SmoothButton</sender>
+        <signal>pressed()</signal>
+        <receiver>simpleGLWidget1</receiver>
+        <slot>Smooth()</slot>
+    </connection>
+    <connection>
+        <sender>SegmentButton</sender>
+        <signal>pressed()</signal>
+        <receiver>simpleGLWidget1</receiver>
+        <slot>Extract()</slot>
+    </connection>
+    <connection>
+        <sender>ApplyButton</sender>
+        <signal>pressed()</signal>
+        <receiver>simpleGLWidget1</receiver>
+        <slot>Apply()</slot>
+    </connection>
+    <connection>
+        <sender>ClearButton</sender>
+        <signal>pressed()</signal>
+        <receiver>simpleGLWidget1</receiver>
+        <slot>Clear()</slot>
+    </connection>
+    <connection>
+        <sender>fileOpenAction</sender>
+        <signal>activated()</signal>
+        <receiver>simpleGLWidget1</receiver>
+        <slot>Open()</slot>
+    </connection>
+    <connection>
+        <sender>fileSaveAction</sender>
+        <signal>activated()</signal>
+        <receiver>simpleGLWidget1</receiver>
+        <slot>SavePly()</slot>
+    </connection>
+</connections>
+<pixmapinproject/>
+<layoutdefaults spacing="6" margin="11"/>
+<includehints>
+    <includehint>simpleglwidget.h</includehint>
+</includehints>
+</UI>
diff --git a/apps/test/segmentation3d/simpleglwidget.cpp b/apps/test/segmentation3d/simpleglwidget.cpp
new file mode 100644
index 00000000..4a2983fd
--- /dev/null
+++ b/apps/test/segmentation3d/simpleglwidget.cpp
@@ -0,0 +1,418 @@
+#include <SimpleGLWidget.h>
+#include <qlineedit.h> 
+#include <qfiledialog.h> 
+#include <qdir.h> 
+#include <qmessagebox.h> 
+
+extern Segmentator *s;
+
+SimpleGLWidget::SimpleGLWidget( QWidget * parent, const char * name, const QGLWidget * shareWidget, WFlags f ):
+QGLWidget(parent, name)
+{
+
+	///grabKeyboard();
+	_showslides=false;
+	blocked=false;
+	wire=true;
+	extForces=false;
+	intForces=false;
+	resultForces=false;
+	continue_int=false;
+	_numslide=0;
+	Track.center=Point3f(0,0,0);
+	Track.Reset();
+	Track.radius= 100;
+	zoom=1;
+}
+
+void SimpleGLWidget::SaveMatrix()
+{
+	glGetDoublev(GL_PROJECTION_MATRIX ,projection);
+	glGetDoublev(GL_MODELVIEW_MATRIX ,modelMatrix);
+	glGetIntegerv(GL_VIEWPORT,viewport);
+}
+
+void SimpleGLWidget::LoadMatrix()
+{
+	glMatrixMode(GL_PROJECTION);
+	glLoadMatrixd(projection);
+	glMatrixMode(GL_MODELVIEW);
+	glLoadMatrixd(modelMatrix);
+}
+
+
+void SimpleGLWidget::drawSlide()
+{	
+glBegin(GL_QUADS);
+for (int x=0;x<((s->V.dimX())-1);x++)
+	for (int y=0;y<((s->V.dimY())-1);y++)
+	{
+		glNormal(Point3d(0,0,1));
+		Point3<int> p0=Point3<int>(x,y,_numslide);
+		double color=((double)s->V.getAt(p0))/256.f;
+		glColor3d(color,color,color);
+		glVertex(p0);
+
+		Point3<int> p1=Point3<int>(x+1,y,_numslide);
+		color=((double)s->V.getAt(p1))/256.f;
+		glColor3d(color,color,color);
+		glVertex(p1);
+
+		Point3<int> p2=Point3<int>(x+1,y+1,_numslide);
+		color=((double)s->V.getAt(p2))/256.f;
+		glColor3d(color,color,color);
+		glVertex(p2);
+
+		Point3<int> p3=Point3<int>(x,y+1,_numslide);
+		color=((double)s->V.getAt(p3))/256.f;
+		glColor3d(color,color,color);
+		glVertex(p3);
+	}
+glEnd();		
+}
+
+void drawForces(Segmentator::Part_VertexContainer *pv,int typeForce)
+{
+Segmentator::Part_VertexContainer::iterator vi;
+glPushAttrib(GL_ALL_ATTRIB_BITS);
+glLineWidth(0.3);
+glDisable(GL_NORMALIZE);
+glDisable(GL_LIGHTING);
+glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
+
+if (typeForce==0)
+	glColor3d(1,0,0);
+else
+if (typeForce==1)
+	glColor3d(0,0,1);
+else
+if (typeForce==2)
+	glColor3d(0,1,0);
+
+for (vi=pv->begin();vi<pv->end();vi++)
+{
+	glBegin(GL_LINE_LOOP);
+	vcg::glVertex((*vi).P());
+	if (typeForce==0)
+		vcg::glVertex((*vi).P()+((*vi).IntForce()*4.f));
+	else
+	if (typeForce==1)
+		vcg::glVertex((*vi).P()+((*vi).ExtForce()*4.f));
+	else
+	if (typeForce==2)
+		vcg::glVertex((*vi).P()+(((*vi).ExtForce()+(*vi).IntForce())*4.f));
+	glEnd();
+}
+glPopAttrib();
+}
+
+void SimpleGLWidget::Save()
+{
+	QString filename = QFileDialog::getSaveFileName("prova.ply",
+													"Ply files (*.ply)",
+													this,
+													"save file dialog",
+													"Choose a filename to save under" );
+	if (filename!=NULL)
+	{
+		const char *path=filename.ascii();
+		vcg::tri::io::ExporterPLY<Segmentator::MyTriMesh>::Save(s->m,path);	
+	}
+	
+}
+
+bool TimeSelfIntersection()
+{
+	static clock_t time=0;
+	clock_t elapsedsecs=abs(time-clock());
+	if (elapsedsecs>500)
+	{
+		time=clock();
+		return true;
+	}
+	return false;
+}
+
+//void SimpleGLWidget::WriteInfo()
+//{
+//	
+//	if (s!=0)
+//	{
+//		
+//		glPushAttrib(0xffffffff);
+//		
+//		glEnable(GL_BLEND);
+//		glBlendFunc(GL_SRC_ALPHA, GL_SRC_ALPHA);
+//		glEnable(GL_LIGHTING);
+//		glEnable(GL_NORMALIZE);
+//		glEnable(GL_COLOR_MATERIAL);
+//		glDisable(GL_CLIP_PLANE0);
+//		glColor4d(0.7,0,0.7,0.6);
+//
+//		glDepthRange(0.0,0.1);
+//
+//		glBegin(GL_QUADS);
+//			glVertex3d(-0.5,-0.5,0);
+//			glVertex3d(-0.5,-0.3,0);
+//			glVertex3d(0.5,-0.3,0);
+//			glVertex3d(0.5,-0.5,0);
+//		glEnd();
+//		
+//		renderText( (width() - 10) / 2, 15, "a" );
+//
+//		QFont f( "arial", 12 );
+//		QFontMetrics fmc( f );
+//		glColor3d(1,1,1);
+//		
+//		QString str="";
+//		int level=0;
+//		
+//		glDisable( GL_LIGHTING );
+//		glDisable( GL_TEXTURE_2D );
+//
+//		level++;
+//		str.sprintf( "Triangles :  %i  Vertex: %i ",s->m.fn,s->m.vn);
+//		renderText( 20, height() - level*20, str, f );
+//	}
+//}
+
+void SimpleGLWidget::SmoothMesh()
+{
+	s->Smooth();
+}
+
+void SimpleGLWidget::glDraw(){
+	
+	glClearColor(0.2,0.2,0.2,1);
+	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	gluPerspective(45,1,0.01,20);
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+	gluLookAt(0,0,1,0,0,0,0,10,0);
+
+	if (s!=0){
+		
+		glPushMatrix();
+		if (_showslides)
+		{
+			vcg::Point3f p=Point3f((float)s->BBox().Center().V(0),(float)s->BBox().Center().V(1),(float)s->BBox().Center().V(2));
+			Track.radius=s->BBox().Diag();
+			Track.GetView();
+			Track.Apply();
+			Track.Draw();
+			glScalef(1/s->BBox().Diag(),1/s->BBox().Diag(),1/s->BBox().Diag());
+			glScalef(GLfloat(zoom),GLfloat(zoom),GLfloat(zoom));
+			glTranslate(-p);
+			//save transformation matrixes
+			SaveMatrix();
+		}
+		else
+		{
+			vcg::tri::UpdateBounding<Segmentator::MyTriMesh>::Box(s->m);
+			vcg::Point3f p=s->m.bbox.Center();
+			Track.radius=s->m.bbox.Diag();
+			Track.GetView();
+			Track.Apply();
+			Track.Draw();
+			glScalef(1/s->m.bbox.Diag(),1/s->m.bbox.Diag(),1/s->m.bbox.Diag());
+			glScalef(GLfloat(zoom),GLfloat(zoom),GLfloat(zoom));
+			glTranslate(-p);
+		}
+		
+		glEnable(GL_NORMALIZE);
+		glEnable(GL_LIGHTING);
+		glEnable(GL_LIGHT0);
+		glEnable(GL_COLOR_MATERIAL);
+		if (_showslides)
+			drawSlide();
+
+		if (intForces)
+			drawForces(&s->P_Vertex,0);
+		if (extForces)
+			drawForces(&s->P_Vertex,1);
+		if (resultForces)
+			drawForces(&s->P_Vertex,2);
+
+		//draw faces
+		glEnable(GL_NORMALIZE);
+		glEnable(GL_LIGHTING);
+		glEnable(GL_LIGHT0);
+		glEnable(GL_COLOR_MATERIAL);
+
+		Segmentator::MyTriMesh::FaceIterator fi;
+		
+
+		if (wire)
+		{
+			glDisable(GL_NORMALIZE);
+			glDisable(GL_LIGHTING);
+			glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
+		}
+		else
+			glPolygonMode(GL_FRONT,GL_FILL);
+
+		int i=0;
+		glBegin(GL_TRIANGLES);
+		for (fi=s->m.face.begin();fi<s->m.face.end();fi++)
+		{
+				glColor3d(0.4,0.8,0.8);
+			if (fi->intersected)
+				glColor3d(1.f,0,0);
+
+			if (((blocked)&&(!fi->IsBlocked()))||(!blocked))
+			{
+				
+				if (!wire)
+					vcg::glNormal(fi->Normal());
+
+				vcg::glVertex(fi->V(0)->P());
+				vcg::glVertex(fi->V(1)->P());
+				vcg::glVertex(fi->V(2)->P());
+			}
+		}
+		glEnd();
+	
+		glPopMatrix();
+		//WriteInfo();
+		
+	}
+	QGLWidget::glDraw();
+}
+
+///open the directiry and initialize dataset
+void SimpleGLWidget::OpenDirectory()
+{
+	QString filename = QFileDialog::getExistingDirectory(
+              ".",
+              this,
+              "open file dialog"
+              "Choose a Directory" );
+	if (filename!=NULL)
+	{
+		const char *path=filename.ascii();
+		char *p=(char*)path;
+		s->LoadFromDir(p,"prova.txt");
+	}
+}
+
+void SimpleGLWidget::resizeGL( int w, int h )
+  {
+	  // setup viewport, projection etc.:
+	glMatrixMode (GL_PROJECTION);
+	glLoadIdentity ();
+	float ratio=(float)w/(float)h;
+	gluPerspective(45,ratio,1,20);
+	_W=w;
+	_H=h;
+	glViewport (0, 0, (GLsizei) w, (GLsizei) h);
+	glMatrixMode (GL_MODELVIEW);
+	repaint();
+
+  }
+
+void SimpleGLWidget::ClearMesh()
+{
+	s->m.Clear();	
+	repaint();
+}
+
+
+void SimpleGLWidget::mousePressEvent ( QMouseEvent * e )
+{
+	if (e->button()==Qt::LeftButton )
+		Track.MouseDown(e->x(),_H-e->y(),vcg::Trackball::BUTTON_LEFT);
+	else
+	//test mass spring model
+	if ((e->button()==Qt::RightButton)&&(_showslides))
+	{
+		float winz;
+		double x;
+		double y;
+		double z;
+		//LoadMatrix();
+		glReadPixels(e->x(),_H-e->y(),1,1,GL_DEPTH_COMPONENT,GL_FLOAT,&winz);
+		gluUnProject(e->x(),_H-e->y(),winz,modelMatrix,projection,viewport,&x,&y,&z);
+		s->SetInitialBarycenter(Point3f(x,y,_numslide));
+		QString color="";
+		color.sprintf("%i",s->gray_init);
+		//w->Color->text()=color;
+		SetExtractionParameters();
+		repaint();
+	}
+	//vcg::tri::UpdateBounding<Segmentator::MyTriMesh>::Box(s->m);
+}
+
+void SimpleGLWidget::wheelEvent(QWheelEvent *e)
+{
+	if (!_showslides)
+	{
+		zoom+=e->delta()/120.f;
+		repaint();
+	}
+	else
+	{
+		int oldnum=_numslide;
+		_numslide+=e->delta()/120.f;
+		if ((_numslide<0)||(_numslide>=s->V.dimZ()))
+				_numslide=oldnum;
+	}
+
+	repaint();
+}
+
+void SimpleGLWidget::mouseReleaseEvent(QMouseEvent * e )
+  {
+	  Track.MouseUp(e->x(),_H-e->y(),vcg::Trackball::BUTTON_LEFT);
+	  repaint();
+  }
+
+void SimpleGLWidget::Step()
+	{
+		if ((s!=0)&&(continue_int))
+			{
+				s->AutoStep();
+				repaint();
+			}
+	}
+
+void SimpleGLWidget::SetExtractionParameters()
+	{
+		float mass=atof(w->M_particles->text());
+		float k_elanst=atof(w->K_elanst->text());
+		float dihedral=atof(w->D_angle->text());
+		float timestep=atof(w->T_step->text());
+		float edge=atof(w->E_size->text());
+		float tolerance=atof(w->Tolerance->text());
+		//int color =atoi(w->Color->text());
+		///to modify
+		s->InitSegmentation(s->gray_init,tolerance,mass,k_elanst,dihedral,timestep,edge);
+	}
+
+void SimpleGLWidget::mouseMoveEvent ( QMouseEvent * e )
+	{
+		Track.MouseMove(e->x(),_H-e->y());
+		repaint();
+	}
+
+
+void SimpleGLWidget::initializeGL(){
+
+	GLfloat f[4]={0.2,0.2,0.2,1.f};
+	GLfloat p[4]={3,3,5,0};
+	glLightfv(GL_LIGHT0, GL_AMBIENT,f);
+	glLightfv(GL_LIGHT1, GL_POSITION,p);
+	glLightfv(GL_LIGHT1, GL_DIFFUSE,f);
+	glLightfv(GL_LIGHT1, GL_SPECULAR,f);
+
+	glEnable(GL_LIGHT0);
+	glEnable(GL_LIGHT1);
+	glEnable(GL_LIGHTING);	
+	glEnable(GL_DEPTH_TEST);
+	glDepthFunc(GL_LESS);
+	glPolygonMode(GL_FRONT,GL_FILL);
+	glEnable(GL_BACK);
+	glCullFace(GL_BACK);
+
+	}
diff --git a/apps/test/segmentation3d/simpleglwidget.h b/apps/test/segmentation3d/simpleglwidget.h
new file mode 100644
index 00000000..59603e8e
--- /dev/null
+++ b/apps/test/segmentation3d/simpleglwidget.h
@@ -0,0 +1,135 @@
+#include <GL\glew.h>
+#include <qgl.h>
+#include <wrap\gl\trimesh.h>
+#include <wrap\gui\trackball.h>
+#include <segmentator.h>
+#include <sim/tri_pde_integrator.h>
+#include <vcg/complex/trimesh/update/bounding.h>
+#include <vcg/complex/trimesh/update/bounding.h>
+#include <wrap/io_trimesh/export_ply.h>
+#include <segmentform.h>
+
+class SimpleGLWidget: public QGLWidget{
+
+Q_OBJECT
+
+private :
+	int _H;
+	int _W;
+	vcg::Trackball Track;
+	double zoom;
+	GLdouble projection[16];
+	GLdouble modelMatrix[16];
+	GLint viewport[4];
+	bool _showslides;
+	int _numslide;
+	bool wire;
+	bool blocked;
+	bool extForces;
+	bool intForces;
+	bool resultForces;
+	bool continue_int;
+	
+	//vcg::GlTrimesh<Segmentator::MyTriMesh> *Wrap;
+	
+public:
+	SegmentForm *w;
+	SimpleGLWidget( QWidget * parent = 0, const char * name = 0, const QGLWidget * shareWidget = 0, WFlags f = 0 );
+
+	virtual void glDraw();
+	//virtual void paintEvent ( QPaintEvent * ) ;
+    void resizeGL( int w, int h );
+    virtual void mousePressEvent ( QMouseEvent * e );
+	virtual void mouseReleaseEvent(QMouseEvent * e );
+	virtual void mouseMoveEvent ( QMouseEvent * e );
+	virtual void wheelEvent ( QWheelEvent * e );
+	//virtual void keyPressEvent(QKeyEvent *k);
+	virtual void initializeGL();
+	virtual void SaveMatrix();
+	virtual void Save();
+	void LoadMatrix();
+	void drawSlide();
+	void SmoothMesh();
+	void Step();
+	void SetExtractionParameters();
+	void WriteInfo();
+	void ClearMesh();
+	void OpenDirectory();
+
+	
+	//virtual void keyPressEvent(QKeyEvent *qk);
+
+	public slots:
+
+	void Open()
+	{
+		OpenDirectory();
+	}
+
+	void ShowSlides()
+	{
+		_showslides=!_showslides;
+		repaint();
+	}
+
+	void SetWire()
+	{
+		wire=!wire;
+		repaint();
+	}
+
+	void SetShowBlocked()
+	{
+		blocked=!blocked;
+		repaint();
+	}
+
+	void ShowExternalForces()
+	{
+		extForces=!extForces;
+		repaint();
+	}
+
+	void ShowInternalForces()
+	{
+		intForces=!intForces;
+		repaint();
+	}
+
+	void ShowResultForces()
+	{
+		resultForces=!resultForces;
+		repaint();
+	}
+	
+	void Smooth()
+	{
+		SmoothMesh();
+		repaint();
+	}
+
+	void SavePly()
+	{
+		Save();
+	}
+
+	void Apply()
+	{
+		SetExtractionParameters();
+	}
+
+	void Extract()
+	{
+		continue_int=!continue_int;
+	}
+
+	void Update()
+	{
+		Step();
+	}
+	
+	void Clear()
+	{
+		ClearMesh();
+	}
+};
\ No newline at end of file
diff --git a/apps/test/segmentation3d/volume_dataset.h b/apps/test/segmentation3d/volume_dataset.h
new file mode 100644
index 00000000..76f219d7
--- /dev/null
+++ b/apps/test/segmentation3d/volume_dataset.h
@@ -0,0 +1,489 @@
+
+#include <qimage.h>
+#include <qdir.h>
+#include <qcolor.h>
+#include <stdio.h>
+#include <list>
+#include <algorithm>
+
+#define LimX 512
+#define LimY 512
+#define LimZ 240
+
+#define dimXCell 20
+#define dimYCell 20
+#define dimZCell 20
+
+#define TLBx 30
+#define TLBy 30
+#define TLBz 30
+
+
+template <class ScalarType>
+class Volume_Dataset_Optimized{
+
+public:	
+
+	Volume_Dataset_Optimized(){pFile=0;};
+	~Volume_Dataset_Optimized(){};
+
+private:
+	class Cell
+	{		
+	public:
+
+		void Clear()
+		{
+			for (int i=0;i<dimZCell;i++)
+				for (int j=0;j<dimYCell;j++)
+					for (int k=0;k<dimXCell;k++)
+						Data[i][j][k]=0;
+		}
+		
+		ScalarType Data[dimXCell][dimYCell][dimZCell] ;
+
+		///operatorn to perform sorting
+		inline bool operator <(const Cell &c)
+		{
+			return (c.timestamp>timestamp);
+		}
+
+		///operatorn to perform sorting
+		inline bool operator ==(const Cell &c)
+		{
+			return (c.timestamp==timestamp);
+		}
+		Point3i index;
+		int timestamp;
+	};
+
+	
+
+	typedef typename std::list<Cell> StackType;
+	typedef typename StackType::iterator IteStack;
+	
+	///the class of grid of iterator to stack structure (corrispondence grid - stack)
+	struct TLBelem
+	{
+	private:
+		IteStack StackPoint;
+
+	public:
+		
+		inline IteStack & I()
+		{
+			return StackPoint;
+		}
+
+		bool inMem;
+	};
+
+	FILE * pFile;
+	StackType CurrStack;
+	
+	TLBelem TLB[TLBx][TLBy][TLBz];
+	Cell buffer[TLBx][TLBy] ;
+
+	int n_element;
+	int max_element;
+	int timestamp;
+
+	int lx;
+	int ly;
+	int lz;
+	int TLBdx;
+	int TLBdy;
+	int TLBdz;
+
+	int timesort;
+
+	void SortStack()
+	{
+		/*std::sort<Cell>(CurrStack.begin(),CurrStack.end());
+		timestamp=0;
+		for (IteStack i=CurrStack.begin();i!=CurrStack.end();i++)
+			(*i).timestamp=0;*/
+	}
+
+	///allocate momory for the buffer
+	void InitBuffer(Cell _buffer[TLBx][TLBy])
+	{
+		for (int j=0;j<TLBy;j++)
+			for (int i=0;i<TLBx;i++)
+			_buffer[i][j].Clear();
+	}
+
+	///set total size of the dataset
+	void Resize(int _lx,int _ly,int _lz)
+	{
+		lx=_lx;
+		ly=_ly;
+		lz=_lz;
+		TLBdx=ceil(((float)_lx)/((float)dimXCell));
+		TLBdy=ceil(((float)_ly)/((float)dimYCell));
+		TLBdz=ceil(((float)_lz)/((float)dimZCell));
+	}
+
+	///return a pair made by cell coordinate an coordinate relative to the cell
+	std::pair<vcg::Point3i,vcg::Point3i> GetCoordinate(int x,int y, int z)
+	{
+		int xd=(int) x/dimXCell;
+		int yd=(int) y/dimYCell;
+		int zd=(int) z/dimZCell;
+
+		int xx= x%dimXCell;
+		int yy= y%dimYCell;
+		int zz= z%dimZCell;
+		
+		return (std::pair<vcg::Point3i,vcg::Point3i> (Point3i(xd,yd,zd),Point3i(xx,yy,zz)));
+	}
+
+	///add an element to the structure
+	void Add(Cell _buffer[TLBx][TLBy],int x, int y, int z, ScalarType value)
+	{
+		assert(value<256);
+		std::pair<vcg::Point3i,vcg::Point3i> coords=GetCoordinate(x,y,z);
+		Point3i cell=coords.first;
+		Point3i inter=coords.second;		
+		_buffer[cell.V(0)][cell.V(1)].Data[inter.V(0)][inter.V(1)][inter.V(2)]=value;
+	}
+
+	///store a cell in the file
+	void SaveCell(Cell &cell)
+	{
+		int size_unit=sizeof( ScalarType );
+		int dim=dimXCell*dimYCell*dimZCell;
+		int numwritten = fwrite(cell.Data, size_unit,dim,pFile );
+	}
+
+	///save to file the current buffer
+	void SwapBuffer(Cell _buffer[TLBx][TLBy])
+	{
+		for (int x=0;x<TLBdx;x++)
+			for (int y=0;y<TLBdy;y++)
+				SaveCell(_buffer[x][y]);
+	}
+	
+	///load a cell from file
+	Cell& loadFromFile(Point3i p)
+	{
+		if (pFile!=0)
+		{
+			//8 for the 2 initial integer that describe the data set
+			/*long offset=2*sizeof( ScalarType );*/
+			long sizeCell=dimXCell*dimYCell*dimZCell;
+			long offset=0;
+			int index=(p.V(2)*TLBdx*TLBdy)+(p.V(1)*TLBdx)+p.V(0);
+			offset+=sizeCell*(index)*sizeof( ScalarType );
+			fseek(pFile,offset,SEEK_SET);
+			Cell c;
+			fread(c.Data, sizeof( ScalarType ),dimXCell*dimYCell*dimZCell,pFile);
+			//assert(!ControlCell(c));
+			c.index=p;
+			return c;
+		}
+	}
+
+	///funtion used to control correct values of a cell use only for debbugging
+	bool ControlCell(Cell &c)
+	{
+		for (int i=0;i<dimXCell;i++)
+				for (int j=0;j<dimYCell;j++)
+					for (int k=0;k<dimZCell;k++)
+							if (c.Data[i][j][k]>=256)
+								return true;
+		return false;
+	}
+
+public:
+
+	///build and save the strucure made fo blocks
+	void Resample(char *path,char *_newFile)
+	{
+		pFile=fopen (_newFile,"w+b");
+
+		//std::vector<Cell> buffer;
+		/*Cell buffer[TLBx][TLBy] ;*/
+
+		//load first one image to see dimensions
+		QImage qI=QImage();
+		QDir Qd=QDir(path);
+		QString qformat;
+		QString Path=QString(path);
+		Qd.setNameFilter("*.jpg");
+		int levels=Qd.count();
+
+		Qd.setSorting(QDir::Name);
+		QString PathFile=Path;
+
+		if (PathFile.right(1)!="/")
+			PathFile.append("/");
+
+		PathFile.append(Qd[0]);
+		bool b=qI.load(PathFile,qformat);
+
+		Resize(qI.width(),qI.height(),levels);
+
+		InitBuffer(buffer);
+		
+		for (int z=0;z<levels; z++)
+		{
+			PathFile=Path;
+			PathFile.append(Qd[z]);
+			qformat=qI.imageFormat(PathFile);
+			bool gray=qI.allGray();
+			b=qI.load(PathFile,qformat);
+
+			//first time I set limits of scalar field
+			for (int x=0;x<qI.width();x++)
+				for (int y=0;y<qI.height();y++)
+				{
+					QRgb color=qI.pixel(x,y);
+					if (gray)//all tree component are the same 
+						Add(buffer,x,y,z,qRed (color)); 
+					else ///otherwise transform
+						Add(buffer,x,y,z,qGray (color));
+				}
+			
+			//if they are the last i swap the buffer
+			if (((z%dimZCell)==(dimZCell-1))||(z==levels-1))
+			{
+				SwapBuffer(buffer);
+				InitBuffer(buffer);
+			}
+		}
+		fclose(pFile);
+		pFile=0;
+	}
+
+	///set initial size of buffer in terms of cell
+	void Init(int size,char* archive,int timeSort=3000)
+	{
+		timestamp=0;
+		n_element=0;
+		max_element=size;
+		CurrStack.clear();
+		pFile=fopen (archive,"r+b");
+		timestamp=0;
+		for(int z=0;z<TLBz;z++)
+				for(int x=0;x<TLBx;x++)
+					for(int y=0;y<TLBy;y++)
+						TLB[x][y][z].inMem=false;
+	}
+
+	///control if i must sort the buffer
+	bool TimeSort()
+	{
+	static clock_t time;
+	clock_t elapsedsecs=abs(time-clock());
+	if (elapsedsecs>timesort)
+	{
+		time=clock();
+		return true;
+	}
+	return false;
+	}
+	
+	inline Point3i Min()//to change in case of difefrent space between sections
+	{return Point3i(0,0,0);}
+
+	inline Point3i Max()//to change in case of difefrent space between sections
+	{return Point3i(lx,ly,lz);}
+
+	///return the x dimension of the dataset
+	inline int dimX()
+	{return lx;}
+
+	///return the y dimension of the dataset
+	inline int dimY()
+	{return ly;}
+
+	///return the z dimension of the dataset
+	inline int dimZ()
+	{return lz;}
+
+
+	///return the lenght of the diagonal
+	inline float Diag()
+	{
+		Point3f diag=Point3f((float) _X,(float) _Y,(float) _Z);
+		return (diag.Norm());
+	}
+
+	/////erase the element not used for long time
+	//void EraseLastUsed()
+	//{
+	//	if (TimeSort())
+	//		SortStack();
+
+	//	int mint=TLB[0][0][0].timestamp;
+	//	Point3i minElem=Point3i(0,0,0);
+
+	//	for(int z=0;z<TLBdz;z++)
+	//		for(int x=0;x<TLBdx;x++)
+	//			for(int y=0;y<TLBdy;y++)
+	//				{
+	//					if ((TLB[x][y][z].timestamp<mint)&&(TLB[x][y][z].inMem==true))
+	//					{
+	//						mint=TLB[x][y][z].timestamp;
+	//						minElem=Point3i(x,y,z);
+	//					}
+	//				}
+
+	//	TLB[minElem.V(0)][minElem.V(1)][minElem.V(2)].inMem=false;
+	//	IteStack ite=TLB[minElem.V(0)][minElem.V(1)][minElem.V(2)].I();
+	//	CurrStack.erase(ite);
+	//}
+
+	
+	///return the value of the element in position point3i(i0,i1,i2)
+	ScalarType getAt(Point3i p)
+	{
+		assert ((p.V(0)<dimX())&&(p.V(1)<dimY())&&(p.V(2)<dimZ()));
+		assert ((p.V(0)>=0)&&(p.V(1)>=0)&&(p.V(2)>=0));
+
+		std::pair<vcg::Point3i,vcg::Point3i> co=GetCoordinate(p.V(0),p.V(1),p.V(2));
+		Point3i cell=co.first;
+		Point3i inter=co.second;
+		TLBelem e=TLB[cell.V(0)][cell.V(1)][cell.V(2)];
+		if (e.inMem)///the element is in the buffer
+		{
+			IteStack i=e.I();
+			ScalarType ret=(*i).Data[inter.V(1)][inter.V(0)][inter.V(2)];
+			timestamp++;
+			(*i).timestamp=timestamp;
+			return (ret);
+		}
+		else///element fault, must load from file ///
+		{
+			//insert new element in the TLB table
+			Cell c=loadFromFile(cell);
+			CurrStack.push_front(c);
+			TLB[cell.V(0)][cell.V(1)][cell.V(2)].I()=CurrStack.begin();
+			TLB[cell.V(0)][cell.V(1)][cell.V(2)].inMem=true;
+			(*CurrStack.begin()).timestamp=timestamp;
+			n_element++;
+			///if the number of element is the meximum , then erase one with second chanche algorithm
+			if (n_element>=max_element)
+			{
+				if (TimeSort())
+					SortStack();
+				CurrStack.pop_back();
+				n_element--;
+			}
+			ScalarType ret=(*CurrStack.begin()).Data[inter.V(1)][inter.V(0)][inter.V(2)];
+			return ret;
+		}
+	}
+
+	
+	
+
+};
+
+
+template <class ScalarType>
+class Volume_Dataset{
+
+public:	
+
+	Volume_Dataset(){};
+	~Volume_Dataset(){};
+
+	ScalarType Data[LimX][LimY][LimZ] ;
+	
+	int lx;
+	int ly;
+	int lz;
+	
+	
+	///set total size of the dataset
+	void Resize(int _lx,int _ly,int _lz)
+	{
+		lx=_lx;
+		ly=_ly;
+		lz=_lz;
+	}
+
+public:
+	
+	///build and save the strucure made fo blocks
+	void Load(char *path)
+	{
+		//load first one image to see dimensions
+		QImage qI=QImage();
+		QDir Qd=QDir(path);
+		QString qformat;
+		QString Path=QString(path);
+		Qd.setNameFilter("*.jpg");
+		int levels=Qd.count();
+
+		Qd.setSorting(QDir::Name);
+		QString PathFile=Path;
+
+		if (PathFile.right(1)!="/")
+			PathFile.append("/");
+
+		PathFile.append(Qd[0]);
+		bool b=qI.load(PathFile,qformat);
+
+		Resize(qI.width(),qI.height(),levels);
+
+		
+		for (int z=0;z<levels; z++)
+		{
+			PathFile=Path;
+			PathFile.append(Qd[z]);
+			qformat=qI.imageFormat(PathFile);
+			bool gray=qI.allGray();
+			b=qI.load(PathFile,qformat);
+
+			//first time I set limits of scalar field
+			for (int x=0;x<qI.width();x++)
+				for (int y=0;y<qI.height();y++)
+				{
+					QRgb color=qI.pixel(x,y);
+					if (gray)//all tree component are the same 
+						Data[x][y][z]=qRed (color); 
+					else ///otherwise transform
+						Data[x][y][z]=qGray (color);
+				}	
+		}
+		
+	}
+
+	
+	inline Point3i Min()//to change in case of difefrent space between sections
+	{return Point3i(0,0,0);}
+
+	inline Point3i Max()//to change in case of different space between sections
+	{return Point3i(lx,ly,lz);}
+
+	///return the x dimension of the dataset
+	inline int dimX()
+	{return lx;}
+
+	///return the y dimension of the dataset
+	inline int dimY()
+	{return ly;}
+
+	///return the z dimension of the dataset
+	inline int dimZ()
+	{return lz;}
+
+	///return the lenght of the diagonal
+	inline float Diag()
+	{
+		Point3f diag=Point3f((float) _X,(float) _Y,(float) _Z);
+		return (diag.Norm());
+	}
+
+	///return the value of the element in position point3i(i0,i1,i2)
+	ScalarType getAt(Point3i p)
+	{
+		assert ((p.V(0)<dimX())&&(p.V(1)<dimY())&&(p.V(2)<dimZ()));
+		assert ((p.V(0)>=0)&&(p.V(1)>=0)&&(p.V(2)>=0));
+		return (Data[p.V(0)][p.V(1)][p.V(2)]);
+	}
+
+};