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// Spatial Index Library
//
// Copyright (C) 2002 Navel Ltd.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Email:
// mhadji@gmail.com
#pragma once
namespace SpatialIndex
{
namespace RTree
{
class Index : public Node
{
public:
virtual ~Index();
protected:
Index(RTree* pTree, id_type id, uint32_t level);
virtual NodePtr chooseSubtree(const Region& mbr, uint32_t level, std::stack<id_type>& pathBuffer);
virtual NodePtr findLeaf(const Region& mbr, id_type id, std::stack<id_type>& pathBuffer);
virtual void split(uint32_t dataLength, byte* pData, Region& mbr, id_type id, NodePtr& left, NodePtr& right);
uint32_t findLeastEnlargement(const Region&) const;
uint32_t findLeastOverlap(const Region&) const;
void adjustTree(Node*, std::stack<id_type>&);
void adjustTree(Node*, Node*, std::stack<id_type>&, byte* overflowTable);
class OverlapEntry
{
public:
uint32_t m_index;
double m_enlargement;
RegionPtr m_original;
RegionPtr m_combined;
double m_oa;
double m_ca;
static int compareEntries(const void* pv1, const void* pv2)
{
OverlapEntry* pe1 = * (OverlapEntry**) pv1;
OverlapEntry* pe2 = * (OverlapEntry**) pv2;
if (pe1->m_enlargement < pe2->m_enlargement) return -1;
if (pe1->m_enlargement > pe2->m_enlargement) return 1;
return 0;
}
}; // OverlapEntry
friend class RTree;
friend class Node;
friend class BulkLoader;
}; // Index
}
}
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