Path: chuka.playstation.co.uk!news From: alex@teeth.demon.co.uk (Alex Amsel) Newsgroups: scee.yaroze.programming.3d_graphics Subject: Re: 3D engines Date: Thu, 10 Apr 1997 12:04:13 GMT Organization: Into Beyond Lines: 25 Message-ID: <334ccf56.1383137@news.playstation.co.uk> References: <3347dd19.3248416@news.playstation.co.uk> <3348D38C.1DC1@interactive.sony.com> <334A3648.1873@micronetics.com> <3349266B.7BD4@interactive.sony.com> <3349a345.33045335@news.playstation.co.uk> <334A3058.218B@interactive.sony.com> <334b3a68.199522@news.playstation.co.uk> <334B7A3E.D59@micronetics.com> <334e8f46.1862969@news.playstation.co.uk> <334BA0FE.43B8@micronetics.com> <334BA349.28A9@interactive.sony.com> <01bc4554$78239ae0$b756dec2@algorithm> <334CAFCD.6081@interactive.sony.com> Reply-To: alex@teeth.demon.co.uk NNTP-Posting-Host: teeth.demon.co.uk Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Newsreader: Forte Agent .99g/32.335 On Thu, 10 Apr 1997 10:15:57 +0100, sceetech did quoth at me: >In 2d it is a representation of a line not a line (and anti aliasing >does recognise the line as having width). In 3d there is the problem of >perspective, how do you think its going to be possible to make the line >thicker if its closer and narrower further away without width? And not >doing this will make it look terrible. Perhaps it doesn't matter! Being mathematically correct or 100% realistic is not the aim of games except simulators. It doesn't have to be the aim of a 3d engine in all ways either. Actually having lines (always a 1 pixel width) is rather handy for some things. It won't look terrible at all - where did you get that idea? Many many many 3d engines of the past 10 years have a special line draw primitive. In many cases you don't care about the thcikness changing, and the overhead of rotation and perspective calcs etc. is just needless. * Alex Amsel * Into Beyond Web Design & JAVA Programming * * http://www.intobeyond.com * WWFC Play off ****ers'97 * MM: "Hand the opposition the lead, the supporters love it"