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/usr/include/terralib/kernel/TeGeometry.h is in libterralib-dev 4.3.0+dfsg.2-11.

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/************************************************************************************
TerraLib - a library for developing GIS applications.
Copyright  2001-2007 INPE and Tecgraf/PUC-Rio.

This code is part of the TerraLib library.
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.

You should have received a copy of the GNU Lesser General Public
License along with this library.

The authors reassure the license terms regarding the warranties.
They specifically disclaim any warranties, including, but not limited to,
the implied warranties of merchantability and fitness for a particular purpose.
The library provided hereunder is on an "as is" basis, and the authors have no
obligation to provide maintenance, support, updates, enhancements, or modifications.
In no event shall INPE and Tecgraf / PUC-Rio be held liable to any party for direct,
indirect, special, incidental, or consequential damages arising out of the use
of this library and its documentation.
*************************************************************************************/
/*! \file TeGeometry.h
    \brief This file contains structures and definitions about	geometries support in TerraLib
*/

#ifndef __TERRALIB_INTERNAL_GEOMETRY_H
#define __TERRALIB_INTERNAL_GEOMETRY_H

#ifdef WIN32
#pragma warning ( disable: 4786 )
#endif

#include "TeDefines.h"
#include "TeBox.h"
#include "TeCoord2D.h"
#include "TeComposite.h"
#include "TeMeasure.h"
#include "TeUtils.h"
#include "TeDataTypes.h"

#include <string>
#include <iostream>


using namespace std;

//!  A basic class for handling geometries in TerraLib
/*! 
	 All geometric classes of TerraLib are derived from
	 TeGeometry. This class keep track of a geometryId and of a bounding box for the geometry
	
	 \note The Geometry classes in TerraLib use the Composite and the Visitor patterns
	 \sa TeBox TeGeomComposite, TeGeomSingle 
*/
class TL_DLL TeGeometry
{
public:

	//! Empty constructor
	TeGeometry(): box_ ( TeMAXFLOAT, TeMAXFLOAT, -TeMAXFLOAT, -TeMAXFLOAT ),
		geomId_  ( 0 ), objectId_ ("") {}

	//! Copy Constructor
	TeGeometry ( const TeGeometry& other ) 
	{
		box_    = other.box_;
		geomId_ = other.geomId_;
		objectId_ = other.objectId_;
	}
	
	//! Destructor
	virtual ~TeGeometry() {}

	//! Sets the bounding box for the object
	void setBox ( const TeBox & box )
	{ box_  = box; }
	
	//! Returns the constant bounding box
	const TeBox& box () const 
	{ return box_; }

	//! Returns the bounding box
	TeBox& box ()
	{ return box_; }

	//! Returns the geometry Id
	int geomId() const
	{ return geomId_; }

	//! Sets the geometryId.
	void geomId( int id )
	{ geomId_ = id; }

	//! Returns the object unique identification
	virtual string objectId() const
	{ return objectId_; }

	//! Sets the objectId 
	virtual void objectId ( const string& id )
	{ objectId_ = id; }

	//! Return the geometry size 
	virtual unsigned int size() const
	{ return 0; }

	//! Outputs the geometical identification to an output stream
	ostream& operator<<(ostream& os)
	{
		os << Te2String(geomId_);
		return os;
	}

	//! Returns TRUE if a geometry is a closed ring  
	virtual bool isRing() const
	{ return false; }

	//! Returns the basic geometry type in a set of geometries structure
	virtual TeGeomRep elemType() const 
	{ return TeGEOMETRYNONE; }
	
protected:

	TeBox	box_;		//!<  The bounding box of the geometry
	int	geomId_;		//!<  The unique geometry identification
	string	objectId_;	//!<  The unique object identification associated to a geometry
};


//! A class that represents a non existent geometry
/*!
	This class is used to deal in a similar way with objects with or without geometry 
*/
class TL_DLL TeGeometryNone:  public TeGeometry
{
public: 
	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TeGEOMETRYNONE; }

	//! Removes geometry elements
	void clear () { return; }
};

//! A class to handle vector geometries
class TL_DLL TeVector : public TeGeometry
{
};

//!   TeGeomSingle: A class for handling geometries in TerraLib which consist of one location
/*!  
  \sa TePoint, TeSample 
*/
template <class T>
class TeGeomSingle : public TeVector
{
public:

    //! Exports the type of the element of a TeGeomSingle
	typedef  T value_type;

	//! Empty constructor
	TeGeomSingle<T>() {}

	//! Constructor from the single element of the container
	TeGeomSingle<T> (const T& elem ): elem_ ( elem  ) 
	{	updateBox ( box_, elem ); }

	//! Copy Constructor
	TeGeomSingle ( const TeGeomSingle& other ) : TeVector()
	{
		box_    = other.box_;
		geomId_ = other.geomId_;
		objectId_ = other.objectId_;
		elem_ = other.elem_;
	}

	//! Equal Operator
	TeGeomSingle& operator = ( const TeGeomSingle& other )
	{
		box_    = other.box_;
		geomId_ = other.geomId_;
		objectId_ = other.objectId_;
		elem_ = other.elem_;
		return *this;
	}

	//! Destructor
	virtual ~TeGeomSingle<T>() {}

	//! Changes the unique element
	void add ( T& elem )
	{
		elem_ = elem;
		box_ = TeBox(TeMAXFLOAT, TeMAXFLOAT,-TeMAXFLOAT,-TeMAXFLOAT); // invalidates its box
		updateBox ( box_, elem );
	}

	//! Returns the unique element
	T&	location ()
	{	return elem_; }

	//! Returns the unique element
	const T& location () const
	{	return elem_; }

	//! Returns the unique element
	T& elem ()
	{	return elem_; }

	//! Returns the unique element
	const T& elem () const
	{	return elem_; }

	//! Returns the unique element
	T& operator [] ( int /* i */) 
	{	return elem_; }

	//! Returns TRUE if a TeGeomSingle is equal to other
	bool operator== (const TeGeomSingle& other) const
	{	return elem_ == other.elem(); }

	//! Returns the size of a TeGeomSingle: always 1
	int size() { return 1; }

protected:
	T	elem_;

};



//!  TeGeomComposite: A template class for handling a hierarchy of geometries in TerraLib
/*!

	  Used for instantiating the different geometries. Provide a vector to store the 2D 
	  coordinates of a ring. Multiple copies of a geometry are allowed to share the same 
	  coordinates by means of a "handle/body"  idiom.

	\sa  TeLine2D TePolygon TeLineSet TePolygonSet
*/

template <class T>  
class TeGeomComposite: public TeVector
{
public:

	//! Constructor
	TeGeomComposite()
	{
		pImpl_ = new TeComposite<T>;
		pImpl_->attach();
	}

	//! Destructor
	virtual ~TeGeomComposite()
	{	pImpl_->detach();	}


	//! Copy Constructor
	TeGeomComposite ( const TeGeomComposite& other ) : TeVector()
	{
		pImpl_ = other.pImpl_;
		pImpl_->attach();
		box_    = other.box_;
		geomId_ = other.geomId_;
		objectId_ = other.objectId_;
	}

	//! Operator =
	TeGeomComposite& operator= ( const TeGeomComposite& other )
	{
		if ( this != &other )
		{	
			other.pImpl_->attach();
			pImpl_->detach();
			pImpl_  = other.pImpl_;
			box_    = other.box_;
			geomId_ = other.geomId_;
			objectId_ = other.objectId_;
		}
		return *this;
	}

	//! Returns the identification of the object associated to this geometry
	virtual string objectId() const
	{ return objectId_; }

	//! Sets the identification of the object associated to this geometry
	virtual void objectId (const string& id )
	{ 
		objectId_ = id; 
		typename TeComposite<T>::iterator it = pImpl_->begin();
		while (it != pImpl_->end())
		{
			it->objectId(id);
			++it;
		}
	}

	//! Copy two composites, duplicating elements (breaking handle/body idiom)
	void copyElements ( const TeGeomComposite& other )
	{
		geomId_ = other.geomId_;
		objectId_ = other.objectId_;

		for (unsigned int i = 0; i < other.pImpl_->size(); i++)
			add (other.pImpl_->operator[](i));
	}

	//! Returns TRUE if two composites have exactly the same elements
	bool operator== (const TeGeomComposite& other) const
	{	
		if ( this->size() != other.size() )
			return false;

		for (unsigned int i = 0; i < other.pImpl_->size(); i++)
			if ( (pImpl_->operator[](i))==(other.pImpl_->operator[]( i )) )
				return false;
		return true; 
	}

	//! Adds a new component
	void add ( const T& elem )
	{	
		pImpl_->add ( elem );
		updateBox ( box_, elem );
	}

	//! Removes the i-th component
	bool erase ( int i )
	{ 	
		bool status = pImpl_->erase (i);

		if (status)	// recalculates the box
		{
			box_ = TeBox(TeMAXFLOAT, TeMAXFLOAT,-TeMAXFLOAT,-TeMAXFLOAT);
			for (unsigned int j = 0; j < pImpl_->size(); j++)
				updateBox(box_,pImpl_->operator[](j));
		}
		return status;
	}

	//! Removes an element
	bool erase ( T& object )
	{	
		bool status = pImpl_->erase ( object ); 
		if (status)	// recalculates the box
		{
			box_ = TeBox(TeMAXFLOAT, TeMAXFLOAT,-TeMAXFLOAT,-TeMAXFLOAT);
			for (unsigned int j = 0; j < pImpl_->size(); j++)
				updateBox(box_,pImpl_->operator[](j));
		}
		return status;
	}

	//! Removes the element pointed by an interator
	typename TeComposite<T>::iterator erase(typename TeComposite<T>::iterator it)
	{	
		typename TeComposite<T>::iterator res = pImpl_->erase(it); 
		box_ = TeBox(TeMAXFLOAT, TeMAXFLOAT,-TeMAXFLOAT,-TeMAXFLOAT);
		for (unsigned int j = 0; j < pImpl_->size(); j++)
			updateBox(box_,pImpl_->operator[](j));
		return res;
	}

	//! Removes all elements
	void clear ()
	{	
		pImpl_->clear ();		// remove all elements
		box_ = TeBox(TeMAXFLOAT, TeMAXFLOAT,-TeMAXFLOAT,-TeMAXFLOAT); // invalidates its box
	}
	
	//! Returns the size of the composite
	unsigned int size() const
	{	return ( (unsigned int) pImpl_->size() ); }

	//! Reserves space for a given number of elements (reserve is available for vectors)  
	void reserve(int nelem)
	{ pImpl_->reserve(nelem); }

	//! Returns the i-th element
	T& operator [] ( int i ) const
	{	return pImpl_->operator[] ( i ); }

	//! Returns the first element
	T& first() const
	{	return pImpl_->operator[] ( 0 ); }
	
	//! Returns the i-th element
	T& last() const
	{	return pImpl_->operator[] ( pImpl_->size()-1 ); }
	
	//! Returns TRUE if composite is empty
	bool empty () const
	{	return pImpl_->empty (); }

	//! An Iterator that enables forward traversal of a TeGeomComposite
	typedef typename TeComposite<T>::iterator iterator;

	//! The type of the value obtained by dereferencing a TeGeomComposite iterator
//	typedef typename T value_type;
	typedef  T value_type;

	//! The iterator to the first position in the TeGeomComposite
	typename TeComposite<T>::iterator begin()
	{ return pImpl_->begin(); }

	//! The iterator to the first position in the TeGeomComposite
	typename TeComposite<T>::iterator const begin() const
	{ return pImpl_->begin(); }

	//! The iterator to the last plus one position in the TeGeomComposite
	typename TeComposite<T>::iterator end()
	{ return pImpl_->end(); }

	//! The iterator to the last plus one position in the TeGeomComposite
	typename TeComposite<T>::iterator const end() const
	{ return pImpl_->end(); }

	//! An Iterator that enables backward traversal of a TeGeomComposite
	typedef typename TeComposite<T>::reverse_iterator reverse_iterator;

	//! The iterator to the first position in the TeGeomComposite in reverse order
	typename TeComposite<T>::reverse_iterator rbegin()
	{ return pImpl_->rbegin(); }

	//! The iterator to the last plus one position in the TeGeomComposite in reverse order
	typename TeComposite<T>::reverse_iterator rend()
	{ return pImpl_->rend(); }

protected:

	//! Pointer to the implementation of a composite<T>
	TeComposite<T> * pImpl_; 
};

//!  TeLine2D: Supports a simple 2D line,  composed of 2D xy points
/*!
	\sa TeGeometry TeLinearRing
*/
class TL_DLL TeLine2D : public TeGeomComposite<TeCoord2D>
{
public:
	//! Check if a line2D is a closed ring
	bool isRing() const;	

	//! Returns the identification of the object associated to this geometry
	string objectId() const
	{ return objectId_; }
	
	//! Sets the identification of the object associated to this geometry
	void objectId (const string& id )
	{  objectId_ = id; }

	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TeLINES; }
};

//!  TeLineSet: Supports a composite of lines
/*!
  \sa TeGeomComposite
*/
class TL_DLL TeLineSet: public TeGeomComposite<TeLine2D>
{
public:
	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TeLINES; }

	//! Executes a real copy of two sets (duplicate the elements)
	void copyElements (const TeLineSet& other ); 
}; 

//!  TeLinearRing: Provides support for a 2D linear ring
/*!
	 A linear ring is a 2D line (without self-intersections) whose 
	 first point is the same as the last point.  A linear ring cannot be created 
	 directly, but is instantiated from a 2D line.

   \sa TePolygon 
*/
class TL_DLL TeLinearRing : public TeLine2D  {
public:

	//! Empty constructor
	TeLinearRing() : TeLine2D() {}

	//! Contructor from a line
	TeLinearRing ( TeLine2D& line );
};


//!  TePolygon: A class for handling 2D polygons. 
/*!
	In TerraLib, a 2D polygon consists of an outer ring and a list
	of inner rings 
*/
class TL_DLL TePolygon: public TeGeomComposite<TeLinearRing>  
{
public:
	
	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TePOLYGONS; }

	//! Executes a real copy of two sets (duplicate the elements)
	void copyElements ( const TePolygon& other );
};

//!  TePolygonSet: A class for handling sets of 2D polygons. 
class TL_DLL TePolygonSet: public TeGeomComposite<TePolygon> 
{
public:
	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TePOLYGONS; }

	//! Executes a real copy of two sets (duplicate the elements)
	void copyElements ( const TePolygonSet& other );
};

	
//!  TePoint: A class for handling 2D Points. 
class TL_DLL TePoint : public TeGeomSingle<TeCoord2D>
{
public:
	//! Default constructor
	TePoint(const double& x = 0., const double& y = 0. ):
		TeGeomSingle<TeCoord2D> ( )
	{
			elem_ = TeCoord2D(x,y);
			setBox(TeBox(x,y,x,y)); // the box of a point is the point itself
	}

	//! Copy constructor
	TePoint(const TeCoord2D& c):
		TeGeomSingle<TeCoord2D> ( )
	{
			elem_ = c;
			setBox(TeBox(c.x(),c.y(),c.x(),c.y())); // the box of a point is the point itself
	}

	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TePOINTS; }

	//! Returns the identification of the object associated to this geometry
	string objectId() const
	{ return objectId_; }
	
	//! Sets the identification of the object associated to this geometry
	void objectId (const string& id )
	{  objectId_ = id; }

};

//!  TePointSet:  A class for handling sets of 2D polygons. 
class TL_DLL TePointSet: public  TeGeomComposite<TePoint> 
{
public:
	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TePOINTS; }
};

//!  TeText : A class for handling text.
class TL_DLL TeText: public TeGeomSingle<TeCoord2D>
{
public:
	//! Default contructor
	/*!
      \param txt the string of character that form the text (default is an empty string)
	*/
	TeText(const string& txt="" ):
		TeGeomSingle<TeCoord2D> ( ),
		angle_(0),
		height_(0),
		textValue_(txt),
		alignmentVert_(0),
		alignmentHoriz_(0)
	{
		elem_ = TeCoord2D(0,0);
		setBox(TeBox(0.0,0.0,0.0,0.0));
	}

	//! Constructor
	/*!
		\param location basic position of the text
		\param txt the string of character that form the text (default is an empty string)
	*/

	TeText( TeCoord2D& location, const string& txt="" ):
		TeGeomSingle<TeCoord2D> ( location ),
		angle_(0),
		height_(0),
		textValue_(txt),
		alignmentVert_(0),
		alignmentHoriz_(0)
	{
		setBox(TeBox(location,location));
	}

	//! Copy constructor
	TeText(const TeText& other ) : TeGeomSingle<TeCoord2D>()
	{
		angle_ = other.angle_;
		height_ = other.height_;
		textValue_ = other.textValue_;
		alignmentVert_ = other.alignmentVert_;
		alignmentHoriz_ = other. alignmentHoriz_;
		setBox(other.box());
		elem_ = other.elem_;
		geomId_ = other.geomId_;
		objectId_ = other.objectId_;
	}

	//! Operator =
	TeText& operator= ( const TeText& other )
	{
		if ( this != &other )
		{	
			angle_ = other.angle_;
			height_ = other.height_;
			textValue_ = other.textValue_;
			alignmentVert_ = other.alignmentVert_;
			alignmentHoriz_ = other. alignmentHoriz_;
			setBox(other.box());
			elem_ = other.elem_;
			geomId_ = other.geomId_;
			objectId_ = other.objectId_;
		}
		return *this;
	}

	//! Returns TRUE if a text is equal to other
	bool operator== (const TeText& tx) const 
	{
		return (angle_ == tx.angle_ &&
			height_ == tx.height_ &&
			textValue_ == tx.textValue_ &&
			alignmentVert_ == tx.alignmentVert_ &&
			alignmentHoriz_ == tx.alignmentHoriz_ &&
			elem_ == tx.elem_ &&
			geomId_ == tx.geomId_ &&
			objectId_ == tx.objectId_);
	}

	//! Sets anew value for the location of the text
	void setLocation(const TeCoord2D& l)
	{	elem_ = l; setBox(TeBox(l,l));	}

	//! Returns the string value of a text
	string textValue () const
	{ return textValue_; }
	
	//! Sets the string value of a text
	void setTextValue (const string &text) 
	{ textValue_ = text; }

	//! Returns the text inclination
	double angle () const
	{ return angle_; }

	//! Sets the text inclination
	void setAngle (double angle) 
	{ angle_ = angle; }

	//! Returns the text height
	double height () const
	{ return height_ ; }

	//! Sets the text height
	void setHeight (double height) 
	{ height_ = height; }

	//! Returns the text vertical alignment
	double alignmentVert () const
	{ return alignmentVert_ ; }

	//! Sets the text vertical alignment
	void setAlignmentVert (double alig) 
	{ alignmentVert_ = alig; }

	//! Returns the text horizontal alignment
	double alignmentHoriz () const
	{ return alignmentHoriz_ ; }

	//! Sets the text horizontal alignment
	void setAlignmentHoriz (double alig) 
	{ alignmentHoriz_ = alig; }

	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TeTEXT; }

private:
	double angle_;	
	double height_;
	string textValue_;
	double alignmentVert_;
	double alignmentHoriz_;
};


//!  TeTextSet : A class for handling sets of TeText.
class TL_DLL TeTextSet : public TeGeomComposite<TeText> 
{
public:
	//! Returns the basic geometry in a set of geometries structure
	TeGeomRep elemType() const { return TeTEXT; }

};


//! TeNode:  A class for handling 2D Nodes.
class TL_DLL TeNode: public TeGeomSingle<TeCoord2D>
{
public:
	//! Returns TRUE if nodes are equal
	bool operator== (const TeNode& node) const
	{
		TeCoord2D p1 = elem_;
		TeCoord2D p2 = node.elem_;
		return p1==p2;
	}

	//! Outputs the geometrical identification of a node
	ostream& operator<<(ostream& os)
	{
		os << Te2String(geomId_);
		return os;
	}

	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TeNODES; }

};

//! Outputs the geometrical identification of a node
TL_DLL ostream& operator<<(ostream& os, TeNode& N);

//!  TeNodeSet :  A class for handling sets of 2D Nodes. 
class TL_DLL TeNodeSet : public TeGeomComposite<TeNode> 

{
public:
	//! Returns the basic geometry in a set of geometries structure
	TeGeomRep elemType() const { return TeNODES; }

};

//!  TeArc : Provides support for a 2D arc.
class TL_DLL TeArc : public TeVector 
{
public:

	//! Empty contructors
	TeArc(): ifrom_ (-1), ito_ (-1){}

	//! Construtor
	/*!
		\param from the starting node of an arc
		\param to the ending node of an arc
	*/
	TeArc(TeNode& from, TeNode& to)
	{
		from_ = from;
		to_ = to;
		updateBox ( box_, from );
		updateBox ( box_, to );
	}

	//! Construtor
	/*!
		\param from the geometrical identification of the  starting node of an arc
		\param to the geometrical identification of the ending node of an arc
	*/
	TeArc(int from, int to): ifrom_ (from), ito_ (to) {}

// -- Methods

	//! Returns the starting node 
	TeNode& fromNode () 
	{ return from_; }

	//! Returns the ending node 
	TeNode& toNode () 
	{ return to_; }

	//! Returns the geometrical identification of the starting node 
	int fromId () const
	{ return ifrom_; }

	//! Sets the geometrical identification of the starting node 
	void fromId (int i) 
	{ ifrom_ = i; }

	//! Returns the geometrical identification of the ending node 
	int toId () const
	{ return ito_; }

	//! Sets the geometrical identification of the ending node 
	void toId (int i)
	{ ito_ = i; }
	
	//! Sets the starting and ending node 
	void setNodes (TeNode& from, TeNode& to)
	{ 
		from_ = from;
		to_ = to;
		updateBox ( box_, from );
		updateBox ( box_, to );
	}

	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TeARCS; }

	//! Returns TRUE if a TeArc is equal to other
	bool operator== (const TeArc& other) const
	{
		if((from_ == other.from_) &&
	       (to_ == other.to_) &&
		   (ifrom_ == other.ifrom_) &&
           (ito_ != other.ito_))
			return true;

		return false;
	}

private:

	TeNode	from_, to_;
	int		ifrom_, ito_;
};

//! Outputs the description of an arc
TL_DLL ostream& operator<<(ostream& os, const TeArc& N);


//!  TeArcSet: Provides support for a set of 2D arc.
class TL_DLL TeArcSet: public TeGeomComposite <TeArc> 
{
public:
	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TeARCS; }
};

//!  TeSample: A class for handling 2D Points with an associated measure.
class TL_DLL TeSample: public TeGeomSingle<TeCoord2D>, public TeMeasure
{
public:
	//! Constructor
	/*!
		\param location the position of the sample
		\param measure the value associated to the sample
	*/
	TeSample ( const TeCoord2D& location, double measure = 0.  ):
		TeGeomSingle<TeCoord2D> ( location ), TeMeasure ( measure ) {}

	TeGeomRep elemType() const { return TeSAMPLES; }
};

//!  TeSampleSet: A class for handling sets of 2D samples
class TL_DLL TeSampleSet: public TeGeomComposite<TeSample>
{
public:
	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TeSAMPLES; }
};

//!  TeContourLine: A class for handling 2D countour lines
class TL_DLL TeContourLine: public TeLine2D, public TeMeasure
{
public:
	//! Constructor
	/*!
		\param line the contour line
		\param measure the value associated to the contour line
	*/
	TeContourLine ( TeLine2D& line, double measure = 0. )
		: TeLine2D ( line ), TeMeasure ( measure )
	{}
};


//!  TeContourLineSet: A class for handling sets of 2D countour lines
class TL_DLL TeContourLineSet: public  TeGeomComposite <TeContourLine> 
{
public:
	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TeSAMPLES; }
};


//!    A class for handling cells. 
class TL_DLL TeCell : public TeVector 
{
	int column_;	//!< the column number of this cell	
	int line_;		//!< the line number of this cell

public:
	//! Empty constructor
	TeCell():
	  column_(-1),
	  line_(-1) {}

	TeCell(TeBox& box, int col, int lin):
	  column_(col),
	  line_(lin) { setBox(box); }

	//! Returns the column identification of the cell
	int	column () const
	{ return column_; }

	//! Sets the column identification of the cell
	void column (int column) 
	{ column_ =  column; }

	//! Returns the line identification of the cell
	int	line () const
	{ return line_; }

	//! Sets the line identification of the cell
	void line (int line) 
	{ line_ =  line; }

	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TeCELLS; }

	//! Returns TRUE if a TeCell is equal to other
	bool operator== (const TeCell& other) const
	{
		if((column_ == other.column_) &&
	       (line_ == other.line_))
			return true;

		return false;
	}
};

//!  A class for handling sets of cells.
class TL_DLL TeCellSet: public  TeGeomComposite<TeCell> 
{
	double	resX_;	//!< the X resolution of a set of cells
	double	resY_;	//!< the Y resolution of a set of cells

public:

	//! Empty constructor
	TeCellSet() : resX_(0.), resY_(0.) 
	{}

	//! Returns the X resolution of a cell set
	double resX () const
	{ return resX_; }

	//! Returns the Y resolution of a cell set
	double resY () const
	{ return resY_; }

	//! Sets the X resolution of a cell set
	void resX (double reX) 
	{ resX_ = reX; }

	//! Sets the Y resolution of a cell set

	void resY (double reY) 
	{ resY_ = reY; }

	//! Returns the basic geometry in a set of geometries structure 
	TeGeomRep elemType() const { return TeCELLS; }

};


/*! \fn TePointSet makePointSet( const TeLinearRing& lr )
   \brief builds a TePointSet geometry from a TeLinearRing
 */
TL_DLL TePointSet makePointSet( const TeLinearRing& lr );


/*! \fn TePointSet makePointSet( const TePolygon& p )
   \brief builds a TePointSet geometry from a TePolygon
 */
TL_DLL TePointSet makePointSet( const TePolygon& p );

#endif