G4KDNode.cc

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//
// $Id$
//
// Author: Mathieu Karamitros (kara (AT) cenbg . in2p3 . fr) 
//
// History:
// -----------
// 10 Oct 2011 M.Karamitros created
//
// -------------------------------------------------------------------

#include "globals.hh"
#include "G4KDNode.hh"
#include "G4KDTree.hh"
#include <ostream>

//*********************************************

//______________________________________________________________________
// Node functions

//void* GetData(G4KDNode* node)
//{
//      return node->GetData() ;
//}
//
//const double* GetNodePosition(G4KDNode* node)
//{
//      return node->GetPosition() ;
//}

//______________________________________________________________________

void InactiveNode(G4KDNode_Base* node)
{
        if(!node) return ;
        node->InactiveNode() ;
}

void Free(G4KDNode_Base*& node)
{
        if(node)
                delete node ;
        node = 0;
}

//______________________________________________________________________
G4KDNode_Base::G4KDNode_Base(G4KDTree* tree,
                G4KDNode_Base* parent):
                                                fTree(tree),
                                                fLeft(0), fRight(0), fParent(parent)
{
        fSide = 0;
        fAxis = fParent == 0? 0 : fParent->fAxis +1 < fTree->fDim? fParent->fAxis+1:0;
}

// Copy constructor should not be used
G4KDNode_Base::G4KDNode_Base(const G4KDNode_Base& ):
                                                fTree(0),
                                                fLeft(0), fRight(0), fParent(0)
{
        fSide = 0;
        fAxis = 0;
}

// Assignement should not be used
G4KDNode_Base& G4KDNode_Base::operator=(const G4KDNode_Base& right)
{
        if (this == &right) return *this;
        fTree = right.fTree;
        fLeft = right.fLeft;
        fRight = right.fRight;
        fParent = right.fParent;
        fSide = right.fSide;
        fAxis = right.fAxis;
        return *this;
}

G4KDNode_Base::~G4KDNode_Base()
{
}

void G4KDNode_Base::InactiveNode()
{
        fTree->NoticeNodeDeactivation();
}

int G4KDNode_Base::GetDim() const
{
        if(fTree)
                return fTree->GetDim();
        else
                return -1;
}

int G4KDNode_Base::Insert(G4KDNode_Base* newNode)
{
        G4KDNode_Base* aParent = FindParent(*newNode);
        // TODO check p == aParent->pos
        // Exception

        newNode->fAxis = aParent->fAxis +1 < fTree->GetDim()? aParent->fAxis+1:0;
        newNode->fParent = aParent ;

        if((*newNode)[aParent->fAxis] > (*aParent)[aParent->fAxis])
        {
                aParent->fRight = newNode ;
                newNode->fSide = 1 ;
        }
        else
        {
                aParent->fLeft = newNode ;
                newNode->fSide = -1 ;
        }

        newNode->fRight = 0;
        newNode->fLeft = 0;

        return 0 ;
}


void G4KDNode_Base::PullSubTree()
{
        if(fParent)
        {
                if(fSide == -1)
                {
                        fParent->fLeft = 0;
                }
                else
                        fParent->fRight = 0;
        }
        if(fLeft) fLeft -> PullSubTree();
        if(fRight) fRight-> PullSubTree();

        fParent  = 0 ;
        fRight   = 0 ;
        fLeft    = 0 ;
        fTree    = 0 ;
}

void G4KDNode_Base::RetrieveNodeList(std::list<G4KDNode_Base *>& output)
{
        output.push_back(this);

        if(fLeft)
                fLeft->RetrieveNodeList(output);

        if(fRight)
                fRight->RetrieveNodeList(output);
}

void G4KDNode_Base::Print(std::ostream& out, int level) const
{
        // Print node level
        out << G4endl;
        for (int i=0; i<level; i++)         // Indent to level
        {
                out << "  ";
        }
        out << level;

        // Print children
        if(fLeft)
        {
                fLeft->Print(out, level + 1);
        }
        if(fRight)
        {
                fRight->Print(out, level + 1);
        }
}