public boolean hasLoS(int objId, int sourceX, int sourceY, short sourceZ, int targetX , int targetY , short targetZ)
	{
		byte  EAST=1, WEST=2, SOUTH=4, NORTH=8; 	
		
		float m;
		float b;
		int x;
		int y;
		
		byte NSEW;
		short newZ;
		boolean LoS;
		GeoDataBuffer geobuf;
		GeoSubCell cellData;

		// I know i will use this one day ...
		//short originalSourceZ, originalTargetZ;
		//originalSourceZ = sourceZ;
		//originalTargetZ = targetZ;
		
		geobuf =checkGeoBuffer(objId, sourceX, sourceY, sourceZ, targetX, targetY, targetZ);  
		if (geobuf != null)
		{
			return geobuf.hadLoS;	
		}
		
		LoS = true;
		newZ =sourceZ;
	
		// avoid / 0 error
		if (sourceX != targetX)
		{
			m = (float) (sourceY - targetY) / (sourceX - targetX);
		}
		else
		{
			m =0;
		}
		
		b = sourceY - (m*sourceX); 
			
		if ( sourceX == targetX ) // vertical line 
		{
			if (sourceY > targetY)  //north
			{
				for (y=sourceY;y > targetY;y = y - 16)
				{
					cellData = getGeoInfoNearest(sourceX, y & 0xFFFFFFF0,newZ);
					NSEW = cellData.getNSEW(); 
					newZ =  cellData.getZ();
					if ( (NSEW & SOUTH) == 0)
					{
						LoS = false;
						break;
					}
				}
			}
			else
			{
				for (y=sourceY;y < targetY;y=y + 16)
				{
					cellData = getGeoInfoNearest(sourceX, (y+16) & 0xFFFFFFF0,newZ);
					NSEW = cellData.getNSEW(); 
					newZ =  cellData.getZ();
					if ( (NSEW & NORTH) == 0)
					{
						LoS = false;
						break;
					}
				}
			}
		}
		else if (targetY==sourceY)	        	// Horizontal Line or m=0
		{
			if (sourceX > targetX)  // west
			{
				for (x=sourceX;x > targetX;x=x - 16)
				{
					cellData = getGeoInfoNearest(x & 0xFFFFFFF0,sourceY,newZ);
					NSEW = cellData.getNSEW(); 
					newZ =  cellData.getZ();
					if ( (NSEW & WEST) == 0)
					{
						LoS = false;
						break;
					}
				}
			} 
			else // EAST
			{
				for (x=sourceX;x < targetX;x=x + 16)
				{
					cellData = getGeoInfoNearest((x +16)& 0xFFFFFFF0,sourceY,newZ);
					NSEW = cellData.getNSEW(); 
					newZ =  cellData.getZ();
					if ( (NSEW & EAST) == 0)
					{
						LoS = false;
						break;
					}
				}
			}
		}
		else if (( m > 0 && m <= 1) || ( m < 0 && m >= -1) ) // east west line -- so more X's to verify than Y's 
		{
			if ( sourceX < targetX) // going East
			{			
				for (x=sourceX;x < targetX ; x = x + 16)
				{
					y = (int)((m*(float)x) +(float) b);
					cellData = getGeoInfoNearest((x + 16) & 0xFFFFFFF0  , y , newZ);
					NSEW = cellData.getNSEW(); 
					newZ =  cellData.getZ();
					if ((NSEW & EAST) == 0)
					{
						LoS = false;
						break;
					}
				}
				if ( m > 0 ) // North bound
				{
					for (y=sourceY;y < targetY; y = y + 16)
					{
						x = (int) (( (float)y -(float) b) / m);
						cellData = getGeoInfoNearest( x  , (y + 16) & 0xFFFFFFF0  , newZ);
						NSEW = cellData.getNSEW(); 
						newZ =  cellData.getZ();
						if ((NSEW & NORTH) == 0)
						{
							LoS = false;
							break;
						}
					}
				}
				else // South Bound
				{
					for (y=sourceY;y > targetY; y = y - 16)
					{
						x = (int) (( (float)y -(float) b) / m);
						cellData = getGeoInfoNearest( x  , y & 0xFFFFFFF0, newZ);
						NSEW = cellData.getNSEW(); 
						newZ =  cellData.getZ();
						if ((NSEW & SOUTH) == 0)
						{
							LoS = false;
							break;
						}
					}
				}
			}
			else // going West
			{
				for ( x=sourceX;x > targetX ; x = x - 16)
				{
					y = (int)((m*(float)x) +(float) b);
					cellData = getGeoInfoNearest( x & 0xFFFFFFF0 ,y , newZ);
					NSEW = cellData.getNSEW(); 
					newZ =  cellData.getZ();
					if ((NSEW & WEST) == 0)
					{
						LoS = false;
						break;
					}
				}
				if ( m > 0 ) // North
				{
					for ( y=sourceY;y < targetY; y = y + 16)
					{
						x = (int) (( (float)y -(float) b) / m);
						cellData = getGeoInfoNearest(x  ,(y + 16) & 0xFFFFFFF0 , newZ);
						NSEW = cellData.getNSEW(); 
						newZ =  cellData.getZ();
						if ((NSEW & NORTH) == 0)
						{
							LoS = false;
							break;
						}
					}
				}
				else // South
				{
					for ( y = sourceY;y > targetY; y = y - 16)
					{
						x = (int) (( (float)y -(float) b) / m);
						cellData = getGeoInfoNearest( x  , y & 0xFFFFFFF0 , newZ);
						NSEW = cellData.getNSEW(); 
						newZ =  cellData.getZ();
						if ((NSEW & SOUTH) == 0)
						{
							LoS = false;
							break;
						}
					}
				}
			}
		}
		else if ( m > 1 || m < -1) //north south line --  so, more y's to verify than x's 
		{
			if (sourceY > targetY) // going north
			{			
				for ( y = sourceY ; y > targetY ; y = y - 16)
				{
					//y = (m * x) + b;
					x = (int) (((float)y-(float)b) / m);
					cellData = getGeoInfoNearest( x , y & 0xFFFFFFF0 , newZ);
					NSEW = cellData.getNSEW(); 
					newZ =  cellData.getZ();
					if ((NSEW & NORTH) == 0)
					{
						LoS = false;
						break;
					}	
				}
				
				if ( m > 0 ) // EAST Bound
				{
					for ( x = sourceX;x < targetX; x = x + 16)
					{
						y = (int)((m*(float)x) +(float) b);
						cellData = getGeoInfoNearest( (x + 16) & 0xFFFFFFF0  , y , newZ);
						NSEW = cellData.getNSEW(); 
						newZ =  cellData.getZ();
						if ((NSEW & EAST) == 0)
						{
							LoS = false;
							break;
						}
					}
				}
				else // West Bound
				{
					for ( x = sourceX;x > targetX; x = x - 16)
					{
						y = (int)((m*(float)x) +(float) b);
						cellData = getGeoInfoNearest( (x + 16) & 0xFFFFFFF0  , y , newZ);
						NSEW = cellData.getNSEW(); 
						newZ =  cellData.getZ();
						if ((NSEW & WEST) == 0)
						{
							LoS = false;
							break;
						}
					}
				}
			}
			else // going South
			{
				for ( y = sourceY ; y < targetY ; y = y + 16)
				{
					//y = (m * x ) + b;
					x =(int) (((float)y-(float)b)/m);
					cellData = getGeoInfoNearest(x ,(y+16) & 0xFFFFFFF0, newZ);
					NSEW = cellData.getNSEW(); 
					newZ =  cellData.getZ();
					if ((NSEW & SOUTH) == 0)
					{
						LoS = false;
						break;
					}
				}
							
				if (m > 0) // WEST bound 
				{
					for ( x = sourceX;x > targetX ; x = x - 16)
					{
						y = (int)((m*(float)x) +(float) b);
						cellData = getGeoInfoNearest( x & 0xFFFFFFF0 , y , newZ);
						NSEW = cellData.getNSEW(); 
						newZ =  cellData.getZ();
						if ((NSEW & WEST) == 0)
						{
							LoS = false;
							break;
						}
					}
				}
				else // EAST bound
				{	
					for ( x = sourceX;x < targetX ; x = x + 16)
					{
						y = (int)((m*(float)x) +(float) b);
						cellData = getGeoInfoNearest((x +16) & 0xFFFFFFF0 ,y , newZ);
						NSEW = cellData.getNSEW(); 
						newZ =  cellData.getZ();
						if ((NSEW & EAST) == 0)
						{
							LoS = false;
							break;
						}
					}
				}
			}
		}
		geobuf = geoRequestBuffer.get(objId);		     	    
		geobuf.hadLoS = LoS;
		return LoS;
	}