geomgraph/index/SweepLineEvent.h
/**********************************************************************
*
* GEOS - Geometry Engine Open Source
* http://geos.osgeo.org
*
* Copyright (C) 2005-2006 Refractions Research Inc.
* Copyright (C) 2001-2002 Vivid Solutions Inc.
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU Lesser General Public Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
**********************************************************************/
#pragma once
#include <geos/export.h>
#include <string>
// Forward declarations
namespace geos {
namespace geomgraph {
namespace index {
class SweepLineEventOBJ;
}
}
}
namespace geos {
namespace geomgraph { // geos::geomgraph
namespace index { // geos::geomgraph::index
//class SweepLineEventLessThen; // needed ??
class GEOS_DLL SweepLineEvent final {
friend class SweepLineEventLessThen;
public:
enum {
INSERT_EVENT = 1,
DELETE_EVENT
};
SweepLineEvent(void* newEdgeSet, double x,
SweepLineEvent* newInsertEvent,
SweepLineEventOBJ* newObj);
~SweepLineEvent() = default;
bool
isInsert()
{
return insertEvent == nullptr;
}
bool
isDelete()
{
return insertEvent != nullptr;
}
int
eventType()
{
return insertEvent == nullptr ? INSERT_EVENT : DELETE_EVENT;
}
SweepLineEvent*
getInsertEvent()
{
return insertEvent;
}
size_t
getDeleteEventIndex()
{
return deleteEventIndex;
}
void
setDeleteEventIndex(std::size_t newDeleteEventIndex)
{
deleteEventIndex = newDeleteEventIndex;
}
SweepLineEventOBJ*
getObject() const
{
return obj;
}
int compareTo(SweepLineEvent* sle);
std::string print();
void* edgeSet; // used for red-blue intersection detection
protected:
SweepLineEventOBJ* obj;
private:
double xValue;
SweepLineEvent* insertEvent; // null if this is an INSERT_EVENT event
std::size_t deleteEventIndex;
};
class GEOS_DLL SweepLineEventLessThen {
public:
template<typename T>
bool
operator()(const T& f, const T& s) const
{
if(f->xValue < s->xValue) {
return true;
}
if(f->xValue > s->xValue) {
return false;
}
if(f->eventType() < s->eventType()) {
return true;
}
return false;
}
};
} // namespace geos.geomgraph.index
} // namespace geos.geomgraph
} // namespace geos
geos::geomgraph::index
Contains classes that implement indexes for performing noding on geometry graph edges.
Definition geomgraph/Edge.h:53
geos::geomgraph
Contains classes that implement topology graphs.
Definition Depth.h:31
geos
Basic namespace for all GEOS functionalities.
Definition geos.h:38