137 lines
2.6 KiB
C++
137 lines
2.6 KiB
C++
/**********************************************************************
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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) 2005-2006 Refractions Research Inc.
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* Copyright (C) 2001-2002 Vivid Solutions Inc.
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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/export.h>
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#include <string>
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// Forward declarations
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namespace geos {
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namespace geomgraph {
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namespace index {
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class SweepLineEventOBJ;
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}
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}
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}
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namespace geos {
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namespace geomgraph { // geos::geomgraph
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namespace index { // geos::geomgraph::index
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//class SweepLineEventLessThen; // needed ??
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class GEOS_DLL SweepLineEvent final {
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friend class SweepLineEventLessThen;
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public:
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enum {
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INSERT_EVENT = 1,
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DELETE_EVENT
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};
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SweepLineEvent(void* newEdgeSet, double x,
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SweepLineEvent* newInsertEvent,
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SweepLineEventOBJ* newObj);
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~SweepLineEvent() = default;
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bool
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isInsert()
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{
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return insertEvent == nullptr;
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}
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bool
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isDelete()
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{
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return insertEvent != nullptr;
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}
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int
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eventType()
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{
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return insertEvent == nullptr ? INSERT_EVENT : DELETE_EVENT;
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}
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SweepLineEvent*
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getInsertEvent()
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{
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return insertEvent;
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}
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size_t
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getDeleteEventIndex()
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{
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return deleteEventIndex;
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}
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void
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setDeleteEventIndex(std::size_t newDeleteEventIndex)
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{
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deleteEventIndex = newDeleteEventIndex;
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}
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SweepLineEventOBJ*
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getObject() const
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{
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return obj;
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}
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int compareTo(SweepLineEvent* sle);
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std::string print();
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void* edgeSet; // used for red-blue intersection detection
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protected:
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SweepLineEventOBJ* obj;
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private:
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double xValue;
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SweepLineEvent* insertEvent; // null if this is an INSERT_EVENT event
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std::size_t deleteEventIndex;
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};
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class GEOS_DLL SweepLineEventLessThen {
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public:
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template<typename T>
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bool
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operator()(const T& f, const T& s) const
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{
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if(f->xValue < s->xValue) {
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return true;
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}
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if(f->xValue > s->xValue) {
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return false;
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}
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if(f->eventType() < s->eventType()) {
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return true;
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}
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return false;
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}
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};
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} // namespace geos.geomgraph.index
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} // namespace geos.geomgraph
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} // namespace geos
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