X-Git-Url: http://git.uio.no/git/?p=u%2Fmrichter%2FAliRoot.git;a=blobdiff_plain;f=STAT%2FTKDTree.h;h=fb9866f3baef8fb7fc22e37c3dff7abef0ca8e6f;hp=3b48910e8f9933ac0f2e6f9a96705f3152d9b73c;hb=316a7f5a175681144596d0f7d69cf1b6ba9c4c50;hpb=f0043941d857185ada2562ca6c38a5f37aa09ce4;ds=sidebyside

diff --git a/STAT/TKDTree.h b/STAT/TKDTree.h
index 3b48910e8f9..fb9866f3bae 100644
--- a/STAT/TKDTree.h
+++ b/STAT/TKDTree.h
@@ -6,6 +6,15 @@
 #endif
 
 #include "TMath.h"
+
+template <typename Index, typename Value>
+struct TKDNode{
+	Char_t fAxis;
+	Value  fValue;
+	
+	ClassDef(TKDNode, 1) // TKDTree node structure
+};
+
 template <typename Index, typename Value> class TKDTree : public TObject
 {
 public:
@@ -18,66 +27,65 @@ public:
 	~TKDTree();
 	
 	// getters
-					inline	Index*	GetPointsIndexes(Int_t node) const {
-						if(node < fNnodes) return 0x0;
-						Int_t offset = (node >= fCrossNode) ? (node-fCrossNode)*fBucketSize : fOffset+(node-fNnodes)*fBucketSize;
-						return &fIndPoints[offset];
-					}
-					inline Char_t		GetNodeAxis(Int_t id) const {return (id < 0 || id >= fNnodes) ? 0 : fNodes[id].fAxis;}
-					inline Value		GetNodeValue(Int_t id) const {return (id < 0 || id >= fNnodes) ? 0 : fNodes[id].fValue;}
-					inline Int_t		GetNNodes() const {return fNnodes;}
-					inline Int_t		GetNTerminalNodes() const {return fNpoints/fBucketSize + ((fNpoints%fBucketSize)?1:0);}
-					inline Value*		GetBoundaries() const {return fBoundaries;}
-					inline Value*		GetBoundary(const Int_t node) const {return &fBoundaries[node*2*fNDim];}
+	inline	Index*	GetPointsIndexes(Int_t node) const {
+		if(node < fNnodes) return 0x0;
+		Int_t offset = (node >= fCrossNode) ? (node-fCrossNode)*fBucketSize : fOffset+(node-fNnodes)*fBucketSize;
+		return &fIndPoints[offset];
+	}
+	inline Char_t		GetNodeAxis(Int_t id) const {return (id < 0 || id >= fNnodes) ? 0 : fNodes[id].fAxis;}
+	inline Value		GetNodeValue(Int_t id) const {return (id < 0 || id >= fNnodes) ? 0 : fNodes[id].fValue;}
+	inline Int_t		GetNNodes() const {return fNnodes;}
+	inline Int_t		GetNTerminalNodes() const {return fNpoints/fBucketSize + ((fNpoints%fBucketSize)?1:0);}
+	inline Value*		GetBoundaries();
+	inline Value*		GetBoundary(const Int_t node);
 	static					Int_t		GetIndex(Int_t row, Int_t collumn){return collumn+(1<<row);}
 	static	inline	void		GetCoord(Int_t index, Int_t &row, Int_t &collumn){for (row=0; index>=(16<<row);row+=4); for (; index>=(2<<row);row++);collumn= index-(1<<row);};
-									Bool_t	FindNearestNeighbors(const Value *point, const Int_t kNN, Index *&i, Value &d);
-									Index		FindNode(const Value * point);
-									void		FindPoint(Value * point, Index &index, Int_t &iter);
-									void		FindInRangeA(Value * point, Value * delta, Index *res , Index &npoints,Index & iter, Int_t bnode);
-									void		FindInRangeB(Value * point, Value * delta, Index *res , Index &npoints,Index & iter, Int_t bnode);
-					inline	void		FindBNodeA(Value * point, Value * delta, Int_t &inode);
-	//
-					inline	Bool_t	IsTerminal(Index inode){return (inode>=fNnodes);}
-	//
-									Value		KOrdStat(Index ntotal, Value *a, Index k, Index *index);
-									void		MakeBoundaries(Value *range = 0x0);
-									
-									void		SetData(Index npoints, Index ndim, UInt_t bsize, Value **data);
-	//
-									void		Spread(Index ntotal, Value *a, Index *index, Value &min, Value &max);
+	Int_t	FindNearestNeighbors(const Value *point, const Int_t kNN, Index *&i, Value *&d);
+	Index           FindNode(const Value * point);
+	void            FindPoint(Value * point, Index &index, Int_t &iter);
+	void            FindInRangeA(Value * point, Value * delta, Index *res , Index &npoints,Index & iter, Int_t bnode);
+	void            FindInRangeB(Value * point, Value * delta, Index *res , Index &npoints,Index & iter, Int_t bnode);
+	inline	void    FindBNodeA(Value * point, Value * delta, Int_t &inode);
+	inline	Bool_t  IsTerminal(Index inode){return (inode>=fNnodes);}
+	Value           KOrdStat(Index ntotal, Value *a, Index k, Index *index);
+	void            MakeBoundaries(Value *range = 0x0);
+	void            SetData(Index npoints, Index ndim, UInt_t bsize, Value **data);
+	void            Spread(Index ntotal, Value *a, Index *index, Value &min, Value &max);
 
 protected:
-									void		Build();  // build tree
+	void            Build();  // build tree
 									
 private:
-									TKDTree(const TKDTree &); // not implemented
-									TKDTree<Index, Value>& operator=(const TKDTree<Index, Value>&); // not implemented
-									void		CookBoundariesTerminal(Int_t parent_node, Bool_t left);
+	TKDTree(const TKDTree &); // not implemented
+	TKDTree<Index, Value>& operator=(const TKDTree<Index, Value>&); // not implemented
+	void            CookBoundaries(Int_t parent_node, Bool_t left);
 
-public:
-	struct TKDNode{
-		Char_t fAxis;
-		Value  fValue;
-	};
 
 protected:
-	Bool_t  kDataOwner;  // Toggle ownership of the data
+	Bool_t  kDataOwner;  //! Toggle ownership of the data
 	Int_t   fNnodes;     // size of node array
-	Index   fNDim;       // number of variables
+	Index   fNDim;       // number of dimensions
+	Index   fNDimm;      // dummy 2*fNDim
 	Index   fNpoints;    // number of multidimensional points
 	Index   fBucketSize; // limit statistic for nodes 
-	Value   **fData;     //!
-	Value		*fRange;     //! range of data for each dimension     
+	TKDNode<Index, Value> *fNodes;     //[fNnodes] nodes descriptors array
+	Value		*fRange;     //[fNDimm] range of data for each dimension
+	Value   **fData;     //! data points
 	Value		*fBoundaries;//! nodes boundaries - check class doc
-	TKDNode *fNodes;
-	Index   *fkNN;       //! k nearest neighbors
 
+// kNN related data
+protected:
+	Int_t   fkNNdim;     //! current kNN arrays allocated dimension
+	Index   *fkNN;       //! k nearest neighbors indexes
+	Value   *fkNNdist;   //! k nearest neighbors distances
+	Value   *fDistBuffer;//! working space for kNN
+	Index   *fIndBuffer; //! working space for kNN
+	
 private:
 	Index   *fIndPoints; //! array of points indexes
-	Int_t   fRowT0;      // smallest terminal row
-	Int_t   fCrossNode;  // cross node
-	Int_t   fOffset;     // offset in fIndPoints
+	Int_t   fRowT0;      //! smallest terminal row
+	Int_t   fCrossNode;  //! cross node
+	Int_t   fOffset;     //! offset in fIndPoints
 
 	ClassDef(TKDTree, 1)  // KD tree
 };
@@ -87,17 +95,34 @@ typedef TKDTree<Int_t, Double_t> TKDTreeID;
 typedef TKDTree<Int_t, Float_t> TKDTreeIF;
 
 //_________________________________________________________________
-template <typename  Index, typename Value> void TKDTree<Index, Value>::FindBNodeA(Value *point, Value *delta, Int_t &inode){
+template <typename  Index, typename Value>
+void TKDTree<Index, Value>::FindBNodeA(Value *point, Value *delta, Int_t &inode){
   //
   // find the smallest node covering the full range - start
   //
   inode =0; 
   for (;inode<fNnodes;){
-    TKDNode & node = fNodes[inode];
+    TKDNode<Index, Value> & node = fNodes[inode];
     if (TMath::Abs(point[node.fAxis] - node.fValue)<delta[node.fAxis]) break;
     inode = (point[node.fAxis] < node.fValue) ? (inode*2)+1: (inode*2)+2;    
   }
 }
 
+//_________________________________________________________________
+template <typename  Index, typename Value>
+Value* TKDTree<Index, Value>::GetBoundaries()
+{
+	if(!fBoundaries) MakeBoundaries();
+	return fBoundaries;
+}
+
+//_________________________________________________________________
+template <typename  Index, typename Value>
+Value* TKDTree<Index, Value>::GetBoundary(const Int_t node)
+{
+	if(!fBoundaries) MakeBoundaries();
+	return &fBoundaries[node*2*fNDim];
+}
+
 #endif