75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
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/**********************************************************************
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*
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* GEOS - Geometry Engine Open Source
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* http://geos.osgeo.org
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*
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* Copyright (C) 2020-2021 Daniel Baston
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU Lesser General Public Licence as published
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* by the Free Software Foundation.
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* See the COPYING file for more information.
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*
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**********************************************************************/
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#pragma once
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#include <geos/index/strtree/TemplateSTRNode.h>
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#include <utility>
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namespace geos {
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namespace index {
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namespace strtree {
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template<typename ItemType, typename BoundsTraits, typename ItemDistance>
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class TemplateSTRNodePair {
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public:
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using Node = TemplateSTRNode<ItemType, BoundsTraits>;
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TemplateSTRNodePair(const Node &node1, const Node &node2, ItemDistance& id)
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: m_node1(&node1), m_node2(&node2), m_distance(distance(id)) {}
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bool isLeaves() const {
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return getFirst().isLeaf() && getSecond().isLeaf();
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}
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double getDistance() const {
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return m_distance;
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}
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std::pair<ItemType, ItemType> getItems() const {
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assert(isLeaves());
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return std::make_pair(getFirst().getItem(), getSecond().getItem());
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}
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const Node &getFirst() const {
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return *m_node1;
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}
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const Node &getSecond() const {
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return *m_node2;
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}
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double distance(ItemDistance& id) {
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if (isLeaves()) {
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return id(getFirst().getItem(), getSecond().getItem());
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} else {
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return BoundsTraits::distance(getFirst().getBounds(), getSecond().getBounds());
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}
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}
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double maximumDistance() {
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return BoundsTraits::maxDistance(getFirst().getBounds(), getSecond().getBounds());
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}
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private:
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const Node* m_node1;
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const Node* m_node2;
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double m_distance;
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};
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}
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}
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}
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