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 == nullptr) return;
//  if(node->IsValid())
  node->InactiveNode();
}

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

//______________________________________________________________________
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);
    }
}