int GetCellIndex( int x, int y ){
		int index = 0;
		index = index | 0x8 * (int)( m_isoField[GetIsoFieldIndex(x,y)] > .13f );
		index = index | 0x4 * (int)( m_isoField[GetIsoFieldIndex(x+1,y)] > .13f );
		index = index | 0x2 * (int)( m_isoField[GetIsoFieldIndex(x+1,y+1)] > .13f );
		index = index | 0x1 * (int)( m_isoField[GetIsoFieldIndex(x,y+1)] > .13f );

		return index;
	}