254 lines
4.2 KiB
C++
254 lines
4.2 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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//paragraph [1] Title: [{\Large \bf \begin {center}] [\end {center}}]
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//[TOC] [\tableofcontents]
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//[_] [\_]
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[1] Header File for the class ~HobbyNaiveIntersectionAlgorithm~
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[TOC]
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1 Overview
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This header file contains all structs and classes required for the
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class ~HobbyNaiveIntersectionAlgorithm~.
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This file is not required for SECONDO. It is only used inside the test project.
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This class is a naive Hobby implementation.
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It uses the ~SimpleSweepIntersectionAlgorithm~ to find all intersections.
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Then tolerance square edges are constructed and a second sweep is performed.
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1 Includes
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*/
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#pragma once
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#include <unordered_set>
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#include <vector>
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#include "SimpleSweepIntersectionAlgorithm.h"
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namespace RobustPlaneSweep
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{
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/*
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1 Class ~HobbyNaiveIntersectionAlgorithm~
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*/
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class HobbyNaiveIntersectionAlgorithm :
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public SimpleSweepIntersectionAlgorithm
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{
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private:
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std::unordered_set<
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InternalPoint,
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InternalPointComparer,
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InternalPointComparer> _roundedPoints;
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int _spacing;
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/*
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1.1 Private enum class ~EventType~
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*/
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enum class EventType
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{
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Undefined,
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BeginSegment,
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EndSegment,
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TolaranceSquare
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};
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/*
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1.1 Private class ~SweepEvent~
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*/
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class SweepEvent
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{
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private:
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int _spacing;
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InternalLineSegment* _segment;
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EventType _eventType;
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int _squareX;
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int _squareY;
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public:
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/*
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1.1.1 Constructors
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*/
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SweepEvent(int squareX, int squareY) :
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_spacing(0),
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_segment(NULL),
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_eventType(EventType::TolaranceSquare),
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_squareX(squareX),
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_squareY(squareY)
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{
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}
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SweepEvent(InternalLineSegment* segment,
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int spacing,
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bool isStart) :
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_spacing(spacing),
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_segment(segment),
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_eventType(isStart ? EventType::BeginSegment : EventType::EndSegment),
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_squareX(0),
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_squareY(0)
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{
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}
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/*
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1.1.1 ~GetEventType~
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*/
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EventType GetEventType() const
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{
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return _eventType;
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}
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/*
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1.1.1 ~GetSegment~
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*/
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InternalLineSegment* GetSegment() const
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{
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return _segment;
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}
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/*
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1.1.1 ~GetSquareX~
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*/
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int GetSquareX() const
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{
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return _squareX;
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}
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/*
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1.1.1 ~GetSquareY~
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*/
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int GetSquareY() const
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{
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return _squareY;
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}
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private:
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/*
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1.1.1 ~GetCompareValue~
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*/
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long long GetCompareValue() const
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{
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switch (_eventType) {
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case EventType::BeginSegment:
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return (_segment->GetLeft().GetX()) - _spacing;
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case EventType::EndSegment:
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return (_segment->GetRight().GetX()) + _spacing;
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case EventType::TolaranceSquare:
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return _squareX;
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default:
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throw new std::logic_error("not supported event type!");
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}
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}
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public:
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/*
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1.1.1 ~operator\textless~
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*/
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bool operator<(const SweepEvent &y) const
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{
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return GetCompareValue() < y.GetCompareValue();
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}
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};
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/*
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1.1 Member variables
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*/
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std::vector<SweepEvent> _events;
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/*
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1.1 Methods
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1.1.1 ~FindRoundedPoints~
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*/
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void FindRoundedPoints();
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/*
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1.1.1 ~CreateEvents~
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*/
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void CreateEvents();
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/*
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1.1.1 ~Hobby~
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*/
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void Hobby();
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protected:
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/*
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1.1.1 ~GetInitialScaleFactor~
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*/
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int GetInitialScaleFactor() const
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{
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return 2;
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}
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/*
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1.1.1 ~DetermineIntersectionsInternal~
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*/
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void DetermineIntersectionsInternal();
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public:
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/*
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1.1.1 Constructor
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*/
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explicit HobbyNaiveIntersectionAlgorithm(IntersectionAlgorithmData* data) :
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SimpleSweepIntersectionAlgorithm(data),
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_spacing(0)
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{
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}
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};
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}
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