Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site tty3b.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!ihnp4!mgnetp!ltuxa!tty3b!jhl From: jhl@tty3b.UUCP ("Jonathon Luers" 97320) Newsgroups: net.graphics Subject: Is GKS useful for 3D shaded graphics? Message-ID: <562@tty3b.UUCP> Date: Thu, 20-Dec-84 12:49:53 EST Article-I.D.: tty3b.562 Posted: Thu Dec 20 12:49:53 1984 Date-Received: Sat, 22-Dec-84 02:31:06 EST Organization: Teletype Corp., Skokie, Ill Lines: 21I have a basic question about how high-quality shaded color graphics, like you see on a SIGGRAPH poster, are generated. I assume the programmer starts with a 3D mathematical model of the object, and then calculates the reflections from a light source off the surface of the object to whatever viewing position is selected. Now it seems to me that a package like GKS or CORE is ideal for describing the object and the viewing angle, but how are reflection, shading, anti-aliasing, etc. handled? Aren't those calculated pixel by pixel? But that doesn't fit in the GKS model, since the user program doesn't know anything about the device, such as resolution, etc. Any GKS or 3D rendering experts out there care to comment? Thanks. Jon Luers AT&T Teletype Corporation ihnp4!tty3b!jhl