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/edgeSelector.hpp

@@ -1106,7 +1106,7 @@ bool EdgeSelector_ColorNaive<PFP>::init()
 
 	assert(this->m_approximators[0]->getType() != A_hQEM || !"Approximator(hQEM) and selector (ColorNaive) are not compatible") ;
 	assert(this->m_approximators[0]->getType() != A_hHalfCollapse || !"Approximator(hHalfCollapse) and selector (ColorNaive) are not compatible") ;
-	assert(this->m_approximators[0]->getType() != A_hLightfieldHalf || !"Approximator(hLightfieldHalf) and selector (ColorNaive) are not compatible") ;
+	assert(this->m_approximators[0]->getType() != A_Lightfield || !"Approximator(hLightfield) and selector (ColorNaive) are not compatible") ;
 
 	// Verify availability of required approximators
 	unsigned int ok = 0 ;
@@ -1373,7 +1373,6 @@ bool EdgeSelector_QEMextColor<PFP>::init()
 
 	assert(this->m_approximators[0]->getType() != A_hQEM || !"Approximator(hQEM) and selector (ColorNaive) are not compatible") ;
 	assert(this->m_approximators[0]->getType() != A_hHalfCollapse || !"Approximator(hHalfCollapse) and selector (ColorNaive) are not compatible") ;
-	assert(this->m_approximators[0]->getType() != A_hLightfieldHalf || !"Approximator(hLightfieldHalf) and selector (ColorNaive) are not compatible") ;
 
 	// Verify availability of required approximators
 	unsigned int ok = 0 ;
@@ -1660,6 +1659,326 @@ void EdgeSelector_QEMextColor<PFP>::computeEdgeInfo(Dart d, EdgeInfo& einfo)
 	}
 }
 
+/*****************************************************************************************************************
+ *                                 LIGHTFIELD QUADRIC ERROR METRIC                                               *
+ *****************************************************************************************************************/
+template <typename PFP>
+bool EdgeSelector_Lightfield<PFP>::init()
+{
+	MAP& m = this->m_map ;
+
+	assert(this->m_approximators[0]->getType() != A_hQEM || !"Approximator(hQEM) and selector (ColorNaive) are not compatible") ;
+	assert(this->m_approximators[0]->getType() != A_hHalfCollapse || !"Approximator(hHalfCollapse) and selector (ColorNaive) are not compatible") ;
+
+	// Verify availability of required approximators
+	unsigned int ok = 0 ;
+	for (unsigned int approxindex = 0 ; approxindex < this->m_approximators.size() ; ++approxindex)
+	{
+		bool saved = false ;
+		for (unsigned int attrindex = 0 ; attrindex < this->m_approximators[approxindex]->getNbApproximated() ; ++ attrindex)
+		{
+			// constraint : 2 approximators in specific order
+			if(ok == 0 && this->m_approximators[approxindex]->getApproximatedAttributeName(attrindex) == "position")
+			{
+				++ok ;
+				m_approxindex_pos = approxindex ;
+				m_attrindex_pos = attrindex ;
+				m_pos = this->m_position ;
+				if (!saved)
+				{
+					m_approx.push_back(reinterpret_cast<Approximator<PFP, VEC3>* >(this->m_approximators[approxindex])) ;
+					saved = true ;
+				}
+			}
+			else if(ok == 1 && this->m_approximators[approxindex]->getApproximatedAttributeName(attrindex) == "frameT")
+			{
+				++ok ;
+//				m_approxindex_FT = approxindex ;
+//				m_attrindex_FT = attrindex ;
+				m_frameT = m.template getAttribute<typename PFP::VEC3, VERTEX>("frameT") ;
+				if (!saved)
+				{
+					m_approx.push_back(reinterpret_cast<Approximator<PFP, VEC3>* >(this->m_approximators[approxindex])) ;
+					assert(m_frameT.isValid() || !"EdgeSelector_QEMextColor: frameT attribute is not valid") ;
+					saved = true ;
+				}
+			}
+			else if(ok == 2 && this->m_approximators[approxindex]->getApproximatedAttributeName(attrindex) == "frameB")
+			{
+				++ok ;
+//				m_approxindex_FB = approxindex ;
+//				m_attrindex_FB = attrindex ;
+				m_frameB = m.template getAttribute<typename PFP::VEC3, VERTEX>("frameB") ;
+				assert(m_frameB.isValid() || !"EdgeSelector_QEMextColor: frameB attribute is not valid") ;
+				if (!saved)
+				{
+					m_approx.push_back(reinterpret_cast<Approximator<PFP, VEC3>* >(this->m_approximators[approxindex])) ;
+					saved = true ;
+				}
+			}
+			else if(ok == 3 && this->m_approximators[approxindex]->getApproximatedAttributeName(attrindex) == "frameN")
+			{
+				++ok ;
+				m_approxindex_FN = approxindex ;
+				m_attrindex_FN = attrindex ;
+				m_frameN = m.template getAttribute<typename PFP::VEC3, VERTEX>("frameN") ;
+				assert(m_frameN.isValid() || !"EdgeSelector_QEMextColor: frameN attribute is not valid") ;
+				if (!saved)
+				{
+					m_approx.push_back(reinterpret_cast<Approximator<PFP, VEC3>* >(this->m_approximators[approxindex])) ;
+					saved = true ;
+				}
+			}
+		}
+	}
+
+	if(ok != 4)
+		return false ;
+
+	TraversorV<MAP> travV(m);
+	for(Dart dit = travV.begin() ; dit != travV.end() ; dit = travV.next())
+	{
+		Quadric<REAL> q ;		// create one quadric
+		m_quadricGeom[dit] = q ;		// per vertex
+	}
+
+	// Compute quadric per vertex
+	TraversorF<MAP> travF(m) ;
+	for(Dart dit = travF.begin() ; dit != travF.end() ; dit = travF.next()) // init QEM quadrics
+	{
+		Dart d1 = m.phi1(dit) ;					// for each triangle,
+		Dart d_1 = m.phi_1(dit) ;					// initialize the quadric of the triangle
+
+		Quadric<REAL> q(this->m_position[dit], this->m_position[d1], this->m_position[d_1]) ;
+		m_quadricGeom[dit] += q ;						// and add the contribution of
+		m_quadricGeom[d1] += q ;						// this quadric to the ones
+		m_quadricGeom[d_1] += q ;						// of the 3 incident vertices
+	}
+
+	TraversorE<MAP> travE(m);
+	for(Dart dit = travE.begin() ; dit != travE.end() ; dit = travE.next())
+	{
+		initEdgeInfo(dit) ; // init the edges with their optimal position
+							// and insert them in the multimap according to their error
+	}
+
+	cur = edges.begin() ; // init the current edge to the first one
+
+	return true ;
+}
+
+template <typename PFP>
+bool EdgeSelector_Lightfield<PFP>::nextEdge(Dart& d)
+{
+	if(cur == edges.end() || edges.empty())
+		return false ;
+	d = (*cur).second ;
+	return true ;
+}
+
+template <typename PFP>
+void EdgeSelector_Lightfield<PFP>::updateBeforeCollapse(Dart d)
+{
+	MAP& m = this->m_map ;
+
+	EdgeInfo& edgeE = edgeInfo[d] ;
+	if(edgeE.valid)
+		edges.erase(edgeE.it) ;
+
+	edgeE = edgeInfo[m.phi1(d)] ;
+	if(edgeE.valid)						// remove all
+		edges.erase(edgeE.it) ;
+
+	edgeE = edgeInfo[m.phi_1(d)] ;	// the edges that will disappear
+	if(edgeE.valid)
+		edges.erase(edgeE.it) ;
+										// from the multimap
+	Dart dd = m.phi2(d) ;
+	if(dd != d)
+	{
+		edgeE = edgeInfo[m.phi1(dd)] ;
+		if(edgeE.valid)
+			edges.erase(edgeE.it) ;
+
+		edgeE = edgeInfo[m.phi_1(dd)] ;
+		if(edgeE.valid)
+			edges.erase(edgeE.it) ;
+	}
+}
+
+/**
+ * Update quadric of a vertex
+ * Discards quadrics of d and assigns freshly calculated
+ * quadrics depending on the actual planes surrounding d
+ * @param dart d
+ */
+template <typename PFP>
+void EdgeSelector_Lightfield<PFP>::recomputeQuadric(const Dart d, const bool recomputeNeighbors)
+{
+	Dart dFront,dBack ;
+	Dart dInit = d ;
+//todo
+	// Init Front
+	dFront = dInit ;
+
+	m_quadricGeom[d].zero() ;
+
+   	do
+   	{
+   		// Make step
+   		dBack = this->m_map.phi2(dFront) ;
+       	dFront = this->m_map.phi2_1(dFront) ;
+
+       	if (dBack != dFront)
+       	{ // if dFront is no border
+       		m_quadricGeom[d] += Quadric<REAL>(m_pos[d],m_pos[this->m_map.phi1(dFront)],m_pos[dBack]) ;
+       	}
+       	if (recomputeNeighbors)
+       		recomputeQuadric(dBack, false) ;
+
+    } while(dFront != dInit) ;
+}
+
+template <typename PFP>
+void EdgeSelector_Lightfield<PFP>::updateAfterCollapse(Dart d2, Dart dd2)
+{
+	MAP& m = this->m_map ;
+	//todo
+	recomputeQuadric(d2, true) ;
+
+	Dart vit = d2 ;
+	do
+	{
+		updateEdgeInfo(m.phi1(vit), true) ;			// must recompute some edge infos in the
+		if(vit == d2 || vit == dd2)					// neighborhood of the collapsed edge
+			initEdgeInfo(vit) ;						// various optimizations are applied here by
+		else										// treating differently :
+			updateEdgeInfo(vit, true) ;
+
+		Dart vit2 = m.phi12(m.phi1(vit)) ;		// - edges for which the criteria must be recomputed
+		Dart stop = m.phi2(vit) ;					// - edges that must be re-embedded
+		do											// - edges for which only the collapsibility must be re-tested
+		{
+			updateEdgeInfo(vit2, true) ;
+			updateEdgeInfo(m.phi1(vit2), false) ;
+			vit2 = m.phi12(vit2) ;
+		} while(vit2 != stop) ;
+
+		vit = m.phi2_1(vit) ;
+	} while(vit != d2) ;
+
+	cur = edges.begin() ; // set the current edge to the first one
+}
+
+template <typename PFP>
+void EdgeSelector_Lightfield<PFP>::initEdgeInfo(Dart d)
+{
+	MAP& m = this->m_map ;
+	EdgeInfo einfo ;
+	if(m.edgeCanCollapse(d))
+		computeEdgeInfo(d, einfo) ;
+	else
+		einfo.valid = false ;
+	edgeInfo[d] = einfo ;
+}
+
+template <typename PFP>
+void EdgeSelector_Lightfield<PFP>::updateEdgeInfo(Dart d, bool recompute)
+{
+	MAP& m = this->m_map ;
+	EdgeInfo& einfo = edgeInfo[d] ;
+	if(recompute)
+	{
+		if(einfo.valid)
+			edges.erase(einfo.it) ;		// remove the edge from the multimap
+		if(m.edgeCanCollapse(d))
+			computeEdgeInfo(d, einfo) ;
+		else
+			einfo.valid = false ;
+	}
+	else
+	{
+		if(m.edgeCanCollapse(d))
+		{								 	// if the edge can be collapsed now
+			if(!einfo.valid)				// but it was not before
+				computeEdgeInfo(d, einfo) ;
+		}
+		else
+		{								 // if the edge cannot be collapsed now
+			if(einfo.valid)				 // and it was before
+			{
+				edges.erase(einfo.it) ;
+				einfo.valid = false ;
+			}
+		}
+	}
+}
+
+template <typename PFP>
+void EdgeSelector_Lightfield<PFP>::computeEdgeInfo(Dart d, EdgeInfo& einfo)
+{
+	MAP& m = this->m_map ;
+	Dart dd = m.phi1(d) ;
+
+	// New position
+	Quadric<REAL> quad ;
+	quad += m_quadricGeom[d] ;	// compute the sum of the
+	quad += m_quadricGeom[dd] ;	// two vertices quadrics
+
+	// compute all approximated attributes
+	for(typename std::vector<ApproximatorGen<PFP>*>::iterator it = this->m_approximators.begin() ;
+			it != this->m_approximators.end() ;
+			++it)
+	{
+		(*it)->approximate(d) ;
+	}
+
+	// Get all approximated attributes
+	// New position
+	const VEC3& newPos = this->m_approx[m_approxindex_pos]->getApprox(d,m_attrindex_pos) ; // get newPos
+	// New normal
+	const VEC3& newFN = this->m_approx[m_approxindex_FN]->getApprox(d,m_attrindex_FN) ; // get new frameN
+
+	// New function
+	// todo const VEC3& hfcoefs0 = this->m_approximators[m_approxindex_hf]->getApprox(d,m_attrindex_hf[0]) ; // get newHFcoefs0
+	// todo const VEC3& hfcoefs1 = this->m_approximators[m_approxindex_hf]->getApprox(d,m_attrindex_hf[1]) ; // get newHFcoefs1
+	// todo const VEC3& hfcoefs2 = this->m_approximators[m_approxindex_hf]->getApprox(d,m_attrindex_hf[2]) ; // get newHFcoefs2
+	// ...
+	// todo const VEC3& hfcoefsK = this->m_approximators[m_approxindex_hf]->getApprox(d,m_attrindex_hf[K]) ; // get newHFcoefsK
+
+	// Compute errors
+	// Position
+	Quadric<REAL> quadGeom ;
+	quadGeom += m_quadricGeom[d] ;	// compute the sum of the
+	quadGeom += m_quadricGeom[dd] ;	// two vertices quadrics
+
+	// hemisphere difference error
+	double scal1 = abs(double(m_frameN[d] * newFN)) ;
+	scal1 = std::min(scal1, double(1)) ; // for epsilon normalization of newFN errors
+	// angle 2
+	double scal2 = abs(double(m_frameN[dd] * newFN)) ;
+	scal2 = std::min(scal2, double(1)) ;
+	// Important: sum of abs values works only if newFN is in-between the two old ones (interpolated).
+	// This avoids computation of the sign of alpha1 and alpha2.
+	double alpha = acos(scal1 + scal2) ;
+
+	std::cout << quadGeom(newPos) << " vs " << alpha/M_PI << std::endl ;
+	// sum of QEM metric and frame orientation difference
+	const REAL& err =
+			quadGeom(newPos) // geom
+			+ alpha / M_PI // frame
+			// todo+ quadHF(newHF) // function coefficients
+			 ;
+
+	// Check if errated values appear
+	if (err < -1e-6)
+		einfo.valid = false ;
+	else
+	{
+		einfo.it = edges.insert(std::make_pair(std::max(err,REAL(0)), d)) ;
+		einfo.valid = true ;
+	}
+}
 
 } // namespace Decimation
 

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