/*	SOMLattice Header
	Robert Kirk Delisle
	23 March 2004

	Purpose:	Defines the SOM Lattice containing the SOMCell nodes.
				Responsible for creation and management of SOMCells
				and training of the network

	Modification History:

*/

#if !defined(SOMLattice_23March2004__INCLUDED)
#define SOMLattice_23March2004__INCLUDED

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000


#include <vector>
using namespace std;

#include "DataSet.h"

template<class SOMCellType> class CSOMLattice
{
private:
	
	struct LatticeCell
	{
		long XPos;			//the X-position within the lattice

		long YPos;			//the Y-position within the lattice

		SOMCellType *Cell;	//the actual cell itself

	};

	vector<LatticeCell> m_SOMCells;	//the nodes of the SOM - assumed to be derived from CSOMCell


	long m_lWidth;					//width of the lattice

	long m_lHeight;					//height of the lattice

	long m_lLatticeRadius;			//topological radius of the SOM lattice

	
public:

	CSOMLattice() {};				

	bool Initialize(long Width, long Height, long NumberOfWeights);
		//primary lattice construction routine


	bool Train(DataSet *data, long numIterations);	
		//function to start training the lattice


	~CSOMLattice();
};

#endif
 

/*	SOMLattice Implementation
	Robert Kirk Delisle
	24 March 2004

	Purpose:	Implements the SOM Lattice containing the SOMCell nodes.
				Responsible for creation and management of SOMCells
				and training of the network

	Modification History:

*/

#include "stdafx.h"

#include "SOMLattice.h"

template<class SOMCellType> bool CSOMLattice<SOMCellType>::Initialize(long Width, long Height, long NumberOfWeights)
{
	/*	Robert Kirk DeLisle
		24 March 2004
		
		Purpose:	Constructs the SOM lattice based upon the passed paramenters.

		Parameters:	Width	-	desired width of the lattice
					Height	-	desired height of the lattice

		Return:		none
	*/
	
	bool bSuccess=true;  //optimistic return

	LatticeCell *currentCell;

	long i,j;	//loop indices

	
	//make space for the cells

	m_SOMCells = vector<LatticeCell*>(Width*Height);

	try
	{
		//put cells into the lattice

		for (i=0; i<Width; i++)
		{
			for (j=0; j<Height; j++)
			{
				currentCell = new LatticeCell;
				currentCell->XPos=i;
				currentCell->YPos=j;
				currentCell->Cell = new SOMCellType(NumberOfWeights);
				m_SOMCells.push_back(currentCell);
			}
		}
	}
	catch(...)
	{
		bSuccess=false;
	}

	return bSuccess;
}

template<class SOMCellType>bool CSOMLattice<SOMCellType>::Train(DataSet *data, long numIterations)
{
	/*	Robert Kirk DeLisle
		24 March 2004
		
		Purpose:	Trains the SOM for the desired number of iterations.
					One iteration is defined as comparison of one observation
					and adjustment of weights.  <this may be modified to an epoch.>

		Parameters:	data	-	pointer to the DataSet object from where to derive the observations

		Return:		true if successful
					false otherwise
	*/

	return true;
}

template<class SOMCellType> CSOMLattice<SOMCellType>::~CSOMLattice()
{
	/*	Robert Kirk DeLisle
		25 March 2004

		Purpose:	Release references as needed.
	
		Parameters:	none

		Return:		none
	*/

	int i;	//loop index


	for (i=0; i<m_SOMCells.size(); i++)
	{
		if (m_SOMCells[i] != 0)
		{
			delete m_SOMCells[i];
		}
	}

	m_SOMCells.clear();

}