Object`Graphics`DemoTEXT2À€ Iï ”ck•”–¢€–T±Í@€JJ````TEXT  £Object`Graphics`Demo Program User Guide  Preliminary Documentation, May 1994  () 1994 Esquimalt Digital Logic Inc. All Rights Reserved.  £Introduction There are currently no proper applications making use of OMEn'sObject Graphics functions. The Object`Graphics`Demo provides a simplemeans of allowing the user to create and display a graphical polygonby clicking clicking with the mouse to select the points of thepolygon.  £Starting Object`Graphics`Demo Click on "Object`Graphics`Demo" in its disk directory to load andstart it. Until it is loaded, its name will appear in the directoryas "ObjectGraphics" owing to DOS filename limitations.  £Drawing A Polygon The demo's window is divided into two areas: the margin, which is agrey pattern, and the interior working area, which has a whitebackground. Corners of the polygon are chosen by clicking inside thewhite area. As each successive point is drawn after the first one,lines are drawn to connect the points. As an added demo feature, twoBezier curves are drawn after the first three points and the firstfour points. These Bezier curves have no effect on the finishedpolygon. When the desired points have been selected, click once in the marginarea. This creates a final line joining the last point with the firstpoint, then the object defined by the lines is made into a bitmappedpolygon using OMEn system calls. This polygon is displayed in thewindow and then discarded. It will only be drawn once and is goneafter the window is moved or needs to be redrawn. There is a limit of somewhere around 30 points to a polygon setwithin the demo program.