big commit sur selectors/approximator (non fini pour la partie champ de lumière)

include/Algo/Decimation/approximator.h

@@ -45,12 +45,11 @@ enum ApproximatorType
 	A_TangentPredict2,
 	A_ColorNaive,
 	A_ColorQEMext,
+	A_Lightfield,
 	// note: the following "h" prefix means that half-edges are prioritized instead of edges.
 	A_hHalfCollapse,
-	A_hQEM,
-	A_hLightfieldHalf,
-	A_hLightfield
-
+	A_hQEM
+	// A_hLightfieldHalf,
 } ;
 
 template <typename PFP>

include/Algo/Decimation/colorPerVertexApproximator.h

@@ -48,6 +48,7 @@ public:
 protected:
 	VertexAttribute<VEC3> m_position ;
 	EdgeAttribute<VEC3> m_approxposition ;
+
 	VertexAttribute<VEC3> *m_color ;
 
 public:
@@ -55,13 +56,6 @@ public:
 		Approximator<PFP, VEC3>(m, attr, pred)
 	{
 		m_color = this->m_attrV[0] ;
-		assert(m_color->isValid() || !"Approximator_ColorNaive: the approximated attribute is not valid") ;
-
-		m_position = this->m_map.template getAttribute<VEC3, VERTEX>("position") ;
-		assert(m_position.isValid() || !"Approximator_ColorNaive: the position attribute is not valid") ;
-
-		m_approxposition = this->m_map.template getAttribute<VEC3, EDGE>("approx_position") ;
-		assert(m_approxposition.isValid() || !"Approximator_ColorNaive: the approx_position attribute is not valid") ;
 	}
 	~Approximator_ColorNaive()
 	{}
@@ -73,7 +67,15 @@ public:
 
 	bool init()
 	{
-		return true ;
+		assert(m_color->isValid() || !"Approximator_ColorNaive: the approximated attribute is not valid") ;
+
+		m_position = this->m_map.template getAttribute<VEC3, VERTEX>("position") ;
+		assert(m_position.isValid() || !"Approximator_ColorNaive::init: the position attribute is not valid") ;
+
+		m_approxposition = this->m_map.template getAttribute<VEC3, EDGE>("approx_position") ;
+		assert(m_approxposition.isValid() || !"Approximator_ColorNaive::init: the approx_position attribute is not valid") ;
+
+		return m_color->isValid() && m_position.isValid() && m_approxposition.isValid() ;
 	}
 
 	void approximate(Dart d) ;
@@ -102,6 +104,7 @@ public:
 		m_position = this->m_attrV[0] ;
 		m_color = this->m_attrV[1] ;
 	}
+
 	~Approximator_ColorQEMext()
 	{}
 

include/Algo/Decimation/colorPerVertexApproximator.hpp

@@ -57,12 +57,14 @@ template <typename PFP>
 bool Approximator_ColorQEMext<PFP>::init()
 {
 	m_quadric = this->m_map.template getAttribute<QuadricNd<REAL,6>, VERTEX>("QEMext-quadric") ;
+	// Does not require to be valid (if it is not, altenatives will be used).
 
 	if(this->m_predictor)
 	{
 		return false ;
 	}
-	return true ;
+
+	return m_position->isValid() && m_color->isValid() ;
 }
 
 template <typename PFP>

include/Algo/Decimation/decimation.hpp

@@ -93,6 +93,7 @@ void decimate(
 			approximators.push_back(new Approximator_QEMhalfEdge<PFP>(map, attribs)) ;
 		break ;
 //		case A_hLightfieldHalf:
+//		{
 //			v_approx = new std::vector<VertexAttribute<typename PFP::VEC3>* >[3] ;
 //
 //			// pos
@@ -110,25 +111,29 @@ void decimate(
 //			for (unsigned int i = 0 ; i < attribs.size() - 4 ; ++i)
 //				v_approx[2].push_back(attribs[i+4]) ;
 //			approximators.push_back(new Approximator_LightfieldCoefsHalf<PFP>(map, v_approx[2])) ;
+//		}
 //		break ;
-		case A_hLightfield :
+		case A_Lightfield :
 		{
-			// pos + frame + hemifunction
-			approximators.push_back(new Approximator_HalfCollapse<PFP>(map, attribs)) ;
-		}
-		break ;
-		/*
-		case A_LightfieldFull_deprecated :
-		{
-			approximators.push_back(new Approximator_QEMhalfEdge<PFP>(map, position)) ;
+			v_approx = new std::vector<VertexAttribute<typename PFP::VEC3>* >[3] ;
 
-			VertexAttribute<Geom::Matrix<3,3,typename PFP::REAL> > frame = map.template getAttribute<Geom::Matrix<3,3,typename PFP::REAL>, VERTEX>("frame") ;
-			VertexAttribute<Geom::Matrix<3,6,typename PFP::REAL> > RGBfunctions = map.template getAttribute<Geom::Matrix<3,6,typename PFP::REAL>, VERTEX>("colorPTM") ;
-			approximators.push_back(new Approximator_Frame_deprecated<PFP>(map, frame)) ;
-			approximators.push_back(new Approximator_RGBfunctions_deprecated<PFP>(map, RGBfunctions)) ;
-			break ;
+			// pos
+			v_approx[0].push_back(attribs[0]) ;
+			approximators.push_back(new Approximator_QEM<PFP>(map, v_approx[0])) ;
+
+			// frame
+			assert(attribs.size() >= 4 || !"Decimate: A_Lightfield --> not enough attribs provided") ;
+			for (unsigned int i = 0 ; i < 3 ; ++i)
+				v_approx[1].push_back(attribs[i+1]) ;
+			approximators.push_back(new Approximator_FrameInterpolation<PFP>(map, v_approx[1])) ;
+
+			// hemifunction
+			assert(attribs.size() >= 5 || !"Decimate: A_Lightfield --> not enough attribs provided") ;
+			for (unsigned int i = 0 ; i < attribs.size() - 4 ; ++i)
+				v_approx[2].push_back(attribs[i+4]) ;
+			approximators.push_back(new Approximator_HemiFuncCoefs<PFP>(map, v_approx[2])) ;
 		}
-		*/
+		break ;
 	}
 
 	switch(s)
@@ -163,8 +168,8 @@ void decimate(
 		case S_hQEMml :
 			selector = new HalfEdgeSelector_QEMml<PFP>(map, position, approximators, selected) ;
 			break ;
-		case S_hLightfield :
-			selector = new HalfEdgeSelector_Lightfield<PFP>(map, position, approximators, selected) ;
+		case S_Lightfield :
+			selector = new EdgeSelector_Lightfield<PFP>(map, position, approximators, selected) ;
 			break ;
 	}
 

include/Algo/Decimation/edgeSelector.h

@@ -502,6 +502,72 @@ public:
 	void updateAfterCollapse(Dart d2, Dart dd2) ;
 } ;
 
+/*****************************************************************************************************************
+ *                                 LIGHTFIELD QUADRIC ERROR METRIC                                               *
+ *****************************************************************************************************************/
+template <typename PFP>
+class EdgeSelector_Lightfield : public EdgeSelector<PFP>
+{
+public:
+	typedef typename PFP::MAP MAP ;
+	typedef typename PFP::REAL REAL ;
+	typedef typename PFP::VEC3 VEC3 ;
+	typedef typename Geom::Vector<6,REAL> VEC6 ;
+
+private:
+	typedef	struct
+	{
+		typename std::multimap<float,Dart>::iterator it ;
+		bool valid ;
+		static std::string CGoGNnameOfType() { return "QEMextColorEdgeInfo" ; }
+	} QEMextColorEdgeInfo ;
+	typedef NoMathIOAttribute<QEMextColorEdgeInfo> EdgeInfo ;
+
+	EdgeAttribute<EdgeInfo> edgeInfo ;
+
+	VertexAttribute<VEC3> m_pos, m_frameT, m_frameB, m_frameN ;
+	//VertexAttribute<VEC3> *m_HF ;
+	int m_approxindex_pos, m_attrindex_pos ;
+	int m_approxindex_FN, m_attrindex_FN ;
+
+	VertexAttribute<Quadric<REAL> > m_quadricGeom ;
+	VertexAttribute<QuadricHF<REAL> > m_quadricHF ;
+
+	std::vector<Approximator<PFP, typename PFP::VEC3>* > m_approx ;
+
+	std::multimap<float,Dart> edges ;
+	typename std::multimap<float,Dart>::iterator cur ;
+
+	void initEdgeInfo(Dart d) ;
+	void updateEdgeInfo(Dart d, bool recompute) ;
+	void computeEdgeInfo(Dart d,EdgeInfo& einfo) ;
+	void recomputeQuadric(const Dart d, const bool recomputeNeighbors = false) ;
+
+public:
+	EdgeSelector_Lightfield(MAP& m, VertexAttribute<typename PFP::VEC3>& pos, std::vector<ApproximatorGen<PFP>*>& approx, const FunctorSelect& select = allDarts) :
+		EdgeSelector<PFP>(m, pos, approx, select),
+		m_approxindex_pos(-1),
+		m_attrindex_pos(-1),
+		m_approxindex_FN(-1),
+		m_attrindex_FN(-1)
+	{
+		edgeInfo = m.template addAttribute<EdgeInfo, EDGE>("edgeInfo") ;
+		m_quadricGeom = m.template addAttribute<Quadric<REAL>, VERTEX>("QEMquadric") ;
+		m_quadricHF = m.template addAttribute<QuadricHF<REAL>, VERTEX>("HFquadric") ;
+	}
+	~EdgeSelector_Lightfield()
+	{
+		this->m_map.removeAttribute(edgeInfo) ;
+		this->m_map.removeAttribute(m_quadricGeom) ;
+		this->m_map.removeAttribute(m_quadricHF) ;
+	}
+	SelectorType getType() { return S_Lightfield ; }
+	bool init() ;
+	bool nextEdge(Dart& d) ;
+	void updateBeforeCollapse(Dart d) ;
+	void updateAfterCollapse(Dart d2, Dart dd2) ;
+} ;
+
 } // namespace Decimation
 
 } // namespace Algo

include/Algo/Decimation/geometryApproximator.hpp

@@ -38,6 +38,7 @@ template <typename PFP>
 bool Approximator_QEM<PFP>::init()
 {
 	m_quadric = this->m_map.template getAttribute<Quadric<REAL>, VERTEX>("QEMquadric") ;
+	// Does not require to be valid (if it is not, altenatives will be used).
 
 	if(this->m_predictor)
 	{

include/Algo/Decimation/halfEdgeSelector.h

@@ -89,77 +89,77 @@ public:
 	void updateAfterCollapse(Dart d2, Dart dd2) ;
 } ;
 
-/*****************************************************************************************************************
- *                                 HALF-EDGE LIGHTFIELD METRIC                                                   *
- *****************************************************************************************************************/
-template <typename PFP>
-class HalfEdgeSelector_Lightfield : public EdgeSelector<PFP>
-{
-public:
-	typedef typename PFP::MAP MAP ;
-	typedef typename PFP::VEC3 VEC3 ;
-	typedef typename PFP::REAL REAL ;
-
-private:
-	typedef	struct
-	{
-		typename std::multimap<float,Dart>::iterator it ;
-		bool valid ;
-		static std::string CGoGNnameOfType() { return "LightfieldHalfEdgeInfo" ; }
-	} QEMhalfEdgeInfo ;
-	typedef NoMathIOAttribute<QEMhalfEdgeInfo> HalfEdgeInfo ;
-
-	DartAttribute<HalfEdgeInfo> halfEdgeInfo ;
-
-	VertexAttribute<VEC3> m_pos, m_frameT, m_frameB, m_frameN ;
-	//VertexAttribute<VEC3> *m_HF ;
-	int m_approxindex_pos, m_attrindex_pos ;
-	int m_approxindex_FN, m_attrindex_FN ;
-
-	VertexAttribute<Quadric<REAL> > m_quadricGeom ;
-	VertexAttribute<QuadricHF<REAL> > m_quadricHF ;
-
-	std::multimap<float,Dart> halfEdges ;
-	typename std::multimap<float,Dart>::iterator cur ;
-
-	std::vector<Approximator<PFP, typename PFP::VEC3>* > m_approx ;
-
-	void initHalfEdgeInfo(Dart d) ;
-	void updateHalfEdgeInfo(Dart d, bool recompute) ;
-	void computeHalfEdgeInfo(Dart d, HalfEdgeInfo& einfo) ;
-	void recomputeQuadric(const Dart d, const bool recomputeNeighbors = false) ;
-
-public:
-	HalfEdgeSelector_Lightfield(MAP& m, VertexAttribute<typename PFP::VEC3>& pos, std::vector<ApproximatorGen<PFP>*>& approx, const FunctorSelect& select = allDarts) :
-		EdgeSelector<PFP>(m, pos, approx, select),
-//		m_positionApproximator(NULL),
-//		m_frameApproximator(NULL),
-//		m_hfcoefsApproximator(NULL),
-//		m_pos(NULL),
-//		m_frameB(NULL),
-//		m_frameN(NULL),
-//		m_frameT(NULL),
-		m_approxindex_pos(-1),
-		m_attrindex_pos(-1),
-		m_approxindex_FN(-1),
-		m_attrindex_FN(-1)
-	{
-		halfEdgeInfo = m.template addAttribute<HalfEdgeInfo, DART>("halfEdgeInfo") ;
-		m_quadricGeom = m.template addAttribute<Quadric<REAL>, VERTEX>("QEMquadric") ;
-		m_quadricHF = m.template addAttribute<QuadricHF<REAL>, VERTEX>("HFquadric") ;
-	}
-	~HalfEdgeSelector_Lightfield()
-	{
-		this->m_map.removeAttribute(halfEdgeInfo) ;
-		this->m_map.removeAttribute(m_quadricGeom) ;
-		this->m_map.removeAttribute(m_quadricHF) ;
-	}
-	SelectorType getType() { return S_hLightfield ; }
-	bool init() ;
-	bool nextEdge(Dart& d) ;
-	void updateBeforeCollapse(Dart d) ;
-	void updateAfterCollapse(Dart d2, Dart dd2) ;
-} ;
+///*****************************************************************************************************************
+// *                                 HALF-EDGE LIGHTFIELD METRIC                                                   *
+// *****************************************************************************************************************/
+//template <typename PFP>
+//class HalfEdgeSelector_Lightfield : public EdgeSelector<PFP>
+//{
+//public:
+//	typedef typename PFP::MAP MAP ;
+//	typedef typename PFP::VEC3 VEC3 ;
+//	typedef typename PFP::REAL REAL ;
+//
+//private:
+//	typedef	struct
+//	{
+//		typename std::multimap<float,Dart>::iterator it ;
+//		bool valid ;
+//		static std::string CGoGNnameOfType() { return "LightfieldHalfEdgeInfo" ; }
+//	} QEMhalfEdgeInfo ;
+//	typedef NoMathIOAttribute<QEMhalfEdgeInfo> HalfEdgeInfo ;
+//
+//	DartAttribute<HalfEdgeInfo> halfEdgeInfo ;
+//
+//	VertexAttribute<VEC3> m_pos, m_frameT, m_frameB, m_frameN ;
+//	//VertexAttribute<VEC3> *m_HF ;
+//	int m_approxindex_pos, m_attrindex_pos ;
+//	int m_approxindex_FN, m_attrindex_FN ;
+//
+//	VertexAttribute<Quadric<REAL> > m_quadricGeom ;
+//	VertexAttribute<QuadricHF<REAL> > m_quadricHF ;
+//
+//	std::multimap<float,Dart> halfEdges ;
+//	typename std::multimap<float,Dart>::iterator cur ;
+//
+//	std::vector<Approximator<PFP, typename PFP::VEC3>* > m_approx ;
+//
+//	void initHalfEdgeInfo(Dart d) ;
+//	void updateHalfEdgeInfo(Dart d, bool recompute) ;
+//	void computeHalfEdgeInfo(Dart d, HalfEdgeInfo& einfo) ;
+//	void recomputeQuadric(const Dart d, const bool recomputeNeighbors = false) ;
+//
+//public:
+//	HalfEdgeSelector_Lightfield(MAP& m, VertexAttribute<typename PFP::VEC3>& pos, std::vector<ApproximatorGen<PFP>*>& approx, const FunctorSelect& select = allDarts) :
+//		EdgeSelector<PFP>(m, pos, approx, select),
+////		m_positionApproximator(NULL),
+////		m_frameApproximator(NULL),
+////		m_hfcoefsApproximator(NULL),
+////		m_pos(NULL),
+////		m_frameB(NULL),
+////		m_frameN(NULL),
+////		m_frameT(NULL),
+//		m_approxindex_pos(-1),
+//		m_attrindex_pos(-1),
+//		m_approxindex_FN(-1),
+//		m_attrindex_FN(-1)
+//	{
+//		halfEdgeInfo = m.template addAttribute<HalfEdgeInfo, DART>("halfEdgeInfo") ;
+//		m_quadricGeom = m.template addAttribute<Quadric<REAL>, VERTEX>("QEMquadric") ;
+//		m_quadricHF = m.template addAttribute<QuadricHF<REAL>, VERTEX>("HFquadric") ;
+//	}
+//	~HalfEdgeSelector_Lightfield()
+//	{
+//		this->m_map.removeAttribute(halfEdgeInfo) ;
+//		this->m_map.removeAttribute(m_quadricGeom) ;
+//		this->m_map.removeAttribute(m_quadricHF) ;
+//	}
+//	SelectorType getType() { return S_hLightfield ; }
+//	bool init() ;
+//	bool nextEdge(Dart& d) ;
+//	void updateBeforeCollapse(Dart d) ;
+//	void updateAfterCollapse(Dart d2, Dart dd2) ;
+//} ;
 
 /*template <typename PFP>
 class HalfEdgeSelector_Lightfield_deprecated : public EdgeSelector<PFP>

include/Algo/Decimation/lightfieldApproximator.h

@@ -37,9 +37,8 @@ namespace Algo
 namespace Decimation
 {
 
-/*
 template <typename PFP>
-class Approximator_FrameHalf : public Approximator<PFP, typename PFP::VEC3>
+class Approximator_FrameInterpolation : public Approximator<PFP, typename PFP::VEC3>
 {
 public:
 	typedef typename PFP::MAP MAP ;
@@ -47,67 +46,181 @@ public:
 	typedef typename PFP::REAL REAL ;
 
 protected:
+	VertexAttribute<VEC3> m_position ;
+	EdgeAttribute<VEC3> m_approxposition ;
+
 	VertexAttribute<VEC3> *m_frameT ;
 	VertexAttribute<VEC3> *m_frameB ;
 	VertexAttribute<VEC3> *m_frameN ;
 
 public:
-	Approximator_FrameHalf(MAP& m, std::vector<VertexAttribute<VEC3>* >& attr, Predictor<PFP, VEC3>* pred = NULL) :
-		Approximator<PFP, VEC3>(m, attr, pred)
+	Approximator_FrameInterpolation(MAP& m, std::vector<VertexAttribute<VEC3>* >& attr, Predictor<PFP, VEC3>* pred = NULL) :
+		Approximator<PFP, VEC3>(m, attr, pred),
+		m_frameT(NULL),
+		m_frameB(NULL),
+		m_frameN(NULL)
 	{
 		if (this->m_attrV.size() < 3)
-			std::cerr << "Approximator_Frame: not enough attributes provided (only " << this->m_attrV.size() << " instead of 3)" << std::endl ;
+			std::cerr << "Approximator_FrameInterpolation: not enough attributes provided (only " << this->m_attrV.size() << " instead of 3)" << std::endl ;
 
 		m_frameT = this->m_attrV[0] ;
 		m_frameB = this->m_attrV[1] ;
 		m_frameN = this->m_attrV[2] ;
-		assert(m_frameT->isValid() || !"Approximator_FrameHalf: the first approximated attribute is not valid") ;
-		assert(m_frameB->isValid() || !"Approximator_FrameHalf: the second approximated attribute is not valid") ;
-		assert(m_frameN->isValid() || !"Approximator_FrameHalf: the third approximated attribute is not valid") ;
 	}
-	~Approximator_FrameHalf()
+
+	~Approximator_FrameInterpolation()
 	{}
 
 	ApproximatorType getType() const
 	{
-		return A_hLightfieldHalf ;
+		return A_Lightfield ;
 	}
 
 	bool init()
 	{
-		return true ;
+		assert(m_frameT->isValid() || !"Approximator_FrameInterpolation: the first approximated attribute is not valid") ;
+		assert(m_frameB->isValid() || !"Approximator_FrameInterpolation: the second approximated attribute is not valid") ;
+		assert(m_frameN->isValid() || !"Approximator_FrameInterpolation: the third approximated attribute is not valid") ;
+
+		m_position = this->m_map.template getAttribute<VEC3, VERTEX>("position") ;
+		assert(m_position.isValid() || !"Approximator_FrameInterpolation::init: the position attribute is not valid") ;
+
+		m_approxposition = this->m_map.template getAttribute<VEC3, EDGE>("approx_position") ;
+		assert(m_approxposition.isValid() || !"Approximator_FrameInterpolation::init: the approx_position attribute is not valid") ;
+
+		return m_frameT->isValid() && m_frameB->isValid() && m_frameN->isValid() && m_position.isValid() && m_approxposition.isValid() ;
 	}
 
 	void approximate(Dart d) ;
 } ;
 
 template <typename PFP>
-class Approximator_LightfieldCoefsHalf : public Approximator<PFP, typename PFP::VEC3>
+class Approximator_HemiFuncCoefs: public Approximator<PFP, typename PFP::VEC3>
 {
 public:
 	typedef typename PFP::MAP MAP ;
 	typedef typename PFP::VEC3 VEC3 ;
 	typedef typename PFP::REAL REAL ;
 
+	unsigned int m_nbCoefs ;
+	unsigned int m_HFtype ;
+
+	VertexAttribute<VEC3 > m_frameT ;
+	VertexAttribute<VEC3 > m_frameB ;
+	VertexAttribute<VEC3 > m_frameN ;
+
+	EdgeAttribute<VEC3 > m_newFrameT ;
+	EdgeAttribute<VEC3 > m_newFrameB ;
+	EdgeAttribute<VEC3 > m_newFrameN ;
+
+	std::vector<VertexAttribute<VEC3>* > m_coefs ;
+
+	VertexAttribute<QuadricHF<REAL> > m_quadricHF ;
+
 public:
-	Approximator_LightfieldCoefsHalf(MAP& m, std::vector<VertexAttribute<VEC3> >& attr, Predictor<PFP, VEC3>* pred = NULL) :
-		Approximator<PFP, VEC3>(m, attr, pred)
-	{}
-	~Approximator_LightfieldCoefsHalf()
+	Approximator_HemiFuncCoefs(MAP& m, std::vector<VertexAttribute<VEC3>* >& attr, Predictor<PFP, VEC3>* pred = NULL) :
+		Approximator<PFP, VEC3>(m, attr, pred),
+		m_nbCoefs(0),
+		m_HFtype(0) // SH = 0
+	{
+		// check name of number 0
+		if (this->m_attrV[0]->name().find("SH") != std::string::npos)
+			m_HFtype = 1 ;
+
+		unsigned int i ;
+		for (i = 1 ; i < 200 ; ++i)
+		{
+			// check if number i is present
+			if ((this->m_attrV.size() <= i) || this->m_attrV[i]->name().find("coefs") == std::string::npos)
+				break ;
+
+			m_coefs.push_back(this->m_attrV[i]) ;
+		}
+		m_nbCoefs = i - 1 ;
+	}
+	~Approximator_HemiFuncCoefs()
 	{}
 
 	ApproximatorType getType() const
 	{
-		return A_hLightfieldHalf ;
+		return A_Lightfield ;
 	}
 
-	bool init()
-	{
-		return true ;
-	}
+	bool init() ;
 
 	void approximate(Dart d) ;
-} ;*/
+} ;
+
+//template <typename PFP>
+//class Approximator_FrameHalf : public Approximator<PFP, typename PFP::VEC3>
+//{
+//public:
+//	typedef typename PFP::MAP MAP ;
+//	typedef typename PFP::VEC3 VEC3 ;
+//	typedef typename PFP::REAL REAL ;
+//
+//protected:
+//	VertexAttribute<VEC3> *m_frameT ;
+//	VertexAttribute<VEC3> *m_frameB ;
+//	VertexAttribute<VEC3> *m_frameN ;
+//
+//public:
+//	Approximator_FrameHalf(MAP& m, std::vector<VertexAttribute<VEC3>* >& attr, Predictor<PFP, VEC3>* pred = NULL) :
+//		Approximator<PFP, VEC3>(m, attr, pred)
+//	{
+//		if (this->m_attrV.size() < 3)
+//			std::cerr << "Approximator_Frame: not enough attributes provided (only " << this->m_attrV.size() << " instead of 3)" << std::endl ;
+//
+//		m_frameT = this->m_attrV[0] ;
+//		m_frameB = this->m_attrV[1] ;
+//		m_frameN = this->m_attrV[2] ;
+//		assert(m_frameT->isValid() || !"Approximator_FrameHalf: the first approximated attribute is not valid") ;
+//		assert(m_frameB->isValid() || !"Approximator_FrameHalf: the second approximated attribute is not valid") ;
+//		assert(m_frameN->isValid() || !"Approximator_FrameHalf: the third approximated attribute is not valid") ;
+//	}
+//	~Approximator_FrameHalf()
+//	{}
+//
+//	ApproximatorType getType() const
+//	{
+//		return A_hLightfieldHalf ;
+//	}
+//
+//	bool init()
+//	{
+//		return true ;
+//	}
+//
+//	void approximate(Dart d) ;
+//} ;
+//
+//template <typename PFP>
+//class Approximator_LightfieldCoefsHalf : public Approximator<PFP, typename PFP::VEC3>
+//{
+//public:
+//	typedef typename PFP::MAP MAP ;
+//	typedef typename PFP::VEC3 VEC3 ;
+//	typedef typename PFP::REAL REAL ;
+//
+//public:
+//	Approximator_LightfieldCoefsHalf(MAP& m, std::vector<VertexAttribute<VEC3> >& attr, Predictor<PFP, VEC3>* pred = NULL) :
+//		Approximator<PFP, VEC3>(m, attr, pred)
+//	{}
+//	~Approximator_LightfieldCoefsHalf()
+//	{}
+//
+//	ApproximatorType getType() const
+//	{
+//		return A_hLightfieldHalf ;
+//	}
+//
+//	bool init()
+//	{
+//		return true ;
+//	}
+//
+//	void approximate(Dart d) ;
+//} ;
 
 } //namespace Decimation
 

include/Algo/Decimation/lightfieldApproximator.hpp

@@ -32,29 +32,150 @@ namespace Decimation
 {
 
 /************************************************************************************
- *                      HALF-CONTRACTION FRAME APPROXIMATOR                         *
- ************************************************************************************
+ *                         FRAME INTERPOLATION APPROXIMATOR                         *
+ ************************************************************************************/
 
 template <typename PFP>
-void Approximator_FrameHalf<PFP>::approximate(Dart d)
+void Approximator_FrameInterpolation<PFP>::approximate(Dart d)
 {
-	this->m_approx[0][d] = m_frameT->operator[](d) ;
-	this->m_approx[1][d] = m_frameB->operator[](d) ;
-	this->m_approx[2][d] = m_frameN->operator[](d) ;
+	const Dart dd = this->m_map.phi2(d) ;
+
+	// if QEM placed new vertex at one of the previous : place same frame
+	if (this->m_approxposition[d] == this->m_position[d]) // new Position is position of vertex d
+	{
+		for (unsigned int i = 0 ; i < 3 ; ++i)
+			this->m_approx[i][d] = this->m_attrV[i]->operator[](d) ;
+	}
+	else if (this->m_approxposition[d] == this->m_position[dd]) // new Position is position of vertex dd
+	{
+		for (unsigned int i = 0 ; i < 3 ; ++i)
+			this->m_approx[i][d] = this->m_attrV[i]->operator[](dd) ;
+	}
+	else
+	{
+		// Create two segments : v0-v1 and v0-v
+		VEC3 v0v1 = this->m_position[dd] ;
+		v0v1 -= this->m_position[d] ;
+
+		VEC3 v0v = this->m_approxposition[d] ;
+		v0v -= this->m_position[d] ;
+
+		// Orthogonal projection of v0-v onto v0-v1 : get coefficient t
+		REAL t = (v0v1 * v0v) / v0v1.norm() ;
+		t = std::max (std::min (t , REAL(1)) , REAL(0) ) ; // clamp it to [0,1]
+
+		const VEC3& normal1 = this->m_attrV[2]->operator[](d) ;
+		const VEC3& normal2 = this->m_attrV[2]->operator[](dd) ;
+
+		VEC3 newN = slerp(normal1,normal2,t) ; // spherical interpolation
+		newN.normalize() ;
+
+		VEC3 newT = normal2 ^ normal1 ; // i is perpendicular to newNormal
+		newT.normalize() ;
+
+		VEC3 newB = newN ^ newT ; // (i,j,n) is a direct frame
+		newB.normalize() ;
+
+		// save into m_approx
+		this->m_approx[0][d] = newT ;
+		this->m_approx[1][d] = newB ;
+		this->m_approx[2][d] = newN ;
+	}
 }
 
-************************************************************************************
- *                      HALF-CONTRACTION LF APPROXIMATOR                            *
- ************************************************************************************
+/************************************************************************************
+ *                      HEMIFUNCTION COEFS APPROXIMATOR                             *
+ ************************************************************************************/
 
 template <typename PFP>
-void Approximator_LightfieldCoefsHalf<PFP>::approximate(Dart d)
+bool Approximator_HemiFuncCoefs<PFP>::init()