Filling polygons 1. find the intersections of the scan line with all edges of the polygon 2. Sort the intersections by increasing X coordinate 3. Fill in all pixels between pairs of intersections that lie interior to the polygonFilling Polygons 1. Find the intersections of the scan line with all edges of the polygon 2. Sort the intersections by increasing x coordinate 3. Fill in all pixels between pairs of intersections that lie interior to the polygon