In a system having a frame buffer for generating an image wherein the image is defined as an outline having an interior described by the non-zero winding rule, the system including the mehtod of providing visual images along a scan direction comprising the steps of entering into the frame buffer predetermined...http://www.google.com.au/patents/US5043711?utm_source=gb-gplus-sharePatent US5043711 - Representation of polygons defined by non-zero winding numbers
