Thoughts On Rasterization

//My thoughts on how to rasterize. Psuedocode.

foreach(polyID)
{
	for(int iy = 0; iy < width; iy ++)
	{
		boolean isOn = false;
		int currentLineFlag;
		for(int ix = 0; ix < height; ix++)
		{
			Pixel p = Screen[ix,iy];
			if(p.isOn())
			{
				boolean partOfCurrentPolygon = ??;
				if(partOfCurrentPolygon)
				{
					//then this pixel is part of the current polygon.
					if(isOn)
					{
						boolean onlyPartOfCurrentLine = ??;
						if(partOfCurrentLine)
						{
							??
						}
						else if(!partOfCurrentLine)
						{
							??
						}
					}
					else if(!isOn)
					{
						??
					}
				}
				else if(!partOfCurrentPolygon)
				{
					??
				}
			}
			else if(!p.isOn())
			{
				if(isOn)
				{
					??
				}
				else if(!isOn)
				{
					??
				}
			}
		}
	}
}






































foreach(polyID)
{
	for(int iy = 0; iy < width; iy ++)
	{
		boolean isOn = false;
		int currentLineFlag;
		for(int ix = 0; ix < height; ix++)
		{
			Pixel p = Screen[ix,iy];
			if(p.isOn())
			{
				boolean partOfCurrentPolygon = (1<<polyID & p.getLineID() != 0);
				if(partOfCurrentPolygon)
				{
					//then this pixel is part of the current polygon.
					if(isOn)
					{
						boolean onlyPartOfCurrentLine = (currentLineFlag | p.getLineID() == currentLineFlag);
						if(partOfCurrentLine)
						{
							//ignore
						}
						else if(!partOfCurrentLine)
						{
							//end the rasterization!
							isOn = false;
						}
					}
					else if(!isOn)
					{
						//we've encountered the first on pixel, so init everything
						isOn = true;
						currentLineFlag = p.getLineID();
					}
				}
				else if(!partOfCurrentPolygon)
				{
					//ignore
				}
			}
			else if(!p.isOn())
			{
				if(isOn)
				{
					//rasterize this pixel
					p.turnOn();
				}
				else if(!isOn)
				{
					//ignore
				}
			}
		}
	}
}