Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!apple!arc!arc!steve From: steve@Advansoft.COM (Steve Savitzky) Newsgroups: comp.graphics.visualization Subject: Re: 4 dimensional geometry Message-ID: Date: 17 Apr 91 00:43:53 GMT References: <1991Apr16.074924.22830@ccu1.aukuni.ac.nz> Sender: @advansoft.com Organization: Advansoft Research Corp, Santa Clara, CA Lines: 19 In-Reply-To: pdbourke@ccu1.aukuni.ac.nz's message of 16 Apr 91 07:49:24 GMT In article <1991Apr16.074924.22830@ccu1.aukuni.ac.nz> pdbourke@ccu1.aukuni.ac.nz (Bourke) writes: I am interested in finding out what techniques people use for rendering 4 dimesional objects, ie: techniques that help one visualise such beasts. At the moment I do things like look at 2D projections, generate contour solids, and colour (yes thats how we spell it down here) depth cueing of wireframe images. I do this for the 4D equivalents of the cube, tetrhedron, octahedron, prism, and pyramid. I would like to extend it to a sphere and the torus. So far I do random rotations of a cube (3-7 dimensions, though anything above 5 can't even *begin* to be comprehended), with optional stereopsis (split pair or red-blue). I also allow perspective to be varied. I'm going to try putting stroke-font text on the faces, spheres on the vertices, and making the wires into cylinders. You wouldn't happen to know what the other Platonic solids in 4-D are? (I understand there are 7, as opposed to 5 in 3-D and 3 in 5+). -- \ --Steve Savitzky-- \ ADVANsoft Research Corp \ REAL hackers use an AXE! \ \ steve@advansoft.COM \ 4301 Great America Pkwy \ #include \ \ arc!steve@apple.COM \ Santa Clara, CA 95954 \ 408-727-3357 \ \__ steve@arc.UUCP _________________________________________________________