Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/3/83; site utcsrgv.UUCP Path: utzoo!utcsrgv!info-mac From: info-mac@utcsrgv.UUCP (info-mac) Newsgroups: ont.micro.mac Subject: bug in quickdraw Message-ID: <4784@utcsrgv.UUCP> Date: Fri, 6-Jul-84 12:28:54 EDT Article-I.D.: utcsrgv.4784 Posted: Fri Jul 6 12:28:54 1984 Date-Received: Fri, 6-Jul-84 13:22:12 EDT Sender: peterr@utcsrgv.UUCP Organization: CSRI, University of Toronto Lines: 42 Date: Thu 5 Jul 84 13:20:31-EDT From: Martin J Mahoney Subject: bug in quickdraw To: info-mac@SUMEX-AIM.ARPA While using the Mac yesterday i discovered a bug in Quickdraw. I tried to draw two rectangles such that they shared a common side, however, one was drawn using the FRAMERECT quickdraw routine and the other used the LINETO quickdraw routines. When the two rectangles were drawn the one draw using the LINETO calls had its vertical sides slightly longer than the one drawn with the FRAMERECT call, when the sides should have all been the same length. Here is the code to reproduce the problem in both MS-basic and Forth: MS-BASIC 10 dim rect%(3) 20 rect%(0)=50:rect%(1)=50:rect%(2)=100:rect%(3)=100 30 call FRAMERECT(varptr(rect%(0))) 40 call moveto(0,50):call lineto(0,100) 50 call lineto(50,100):call lineto(50,50):call lineto(0,50) 60 end FORTH gint 50 50 100 100 frame rectangle 0 50 0 100 vector 0 100 50 100 vector 50 100 50 50 vector 50 50 0 50 vector Martin J. Mahoney -------