Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!lll-lcc!styx!ptsfa!ihnp4!ihwpt!knudsen From: knudsen@ihwpt.ATT.COM (mike knudsen) Newsgroups: comp.sys.m6809 Subject: Fat Lines drawn in Level 2 Message-ID: <1641@ihwpt.ATT.COM> Date: Mon, 27-Apr-87 19:10:52 EDT Article-I.D.: ihwpt.1641 Posted: Mon Apr 27 19:10:52 1987 Date-Received: Wed, 29-Apr-87 04:15:24 EDT Organization: AT&T Bell Laboratories - Naperville, Illinois Lines: 27 Keywords: OS9,graphics,fat,ugly Graphics hackers may have noticed that Level 2 still perpetrates a bad feature of Level 1's line-drawing routines, namely Fat Lines. By this I mean that, whenever a line takes a step, an extra pixel is drawn that overlaps the previous one. Example: Fat: Skinny: 0000 000 0000 000 0000 000 The overlapping pixels make fine drawings look like your pen leaked on the paper. 45-degree lines end up twice as thick. Compare lines drawn under OS9 with RS-BASIC's LINE or DRAW command output -- their lines are "skinny" and much cleaner looking. There are no fixes for this, except to rewrite your own graphics drivers (wow!) or to create your images by other means, GET them into a buffer, and use PUT. That's a shame, since my quick tests indicate that line drawing is much faster than PUT. Oh well, should have complained last year. Too late now ... mike k -- Mike J Knudsen ...ihnp4!ihwpt!knudsen Bell Labs(AT&T) Delphi: RAGTIMER CIS: "Just say NO to MS-DOS!"