Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!apple!uokmax!servalan!epmooch!ben From: ben@epmooch.UUCP (Rev. Ben A. Mesander) Newsgroups: comp.sys.amiga.programmer Subject: Re: Fast 3d Graphics Message-ID: Date: 6 Apr 91 08:24:05 GMT References: <9529@star.cs.vu.nl> <1047@cbmger.UUCP> <20338@cbmvax.commodore.com> <1073@cbmger.UUCP> <9576@star.cs.vu.nl> Lines: 19 >In article <9576@star.cs.vu.nl> mmblom@cs.vu.nl (Marc Blom) writes: [...] >I think i misunderstood you, I am allready using tables for the sin/cos >values, I thought you meant tables for the multiplies, then the coordinate >system's size is very important, the larger your coordinate system, the >larger the multable. I think often you can reduce the size of the multable by carefully looking at your algorithms. I've done something like this for graphics in Z-80 assembler, where I used properties of the screen addressing to reduce my multable (everything had to fit in 32K) similarly to the trig identities for reducing the sin/cos table. Look at your problem very carefully... >Marc Blom, Vrije Universiteit Amsterdam, Email: mmblom@cs.vu.nl | short .sig -- | ben@epmooch.UUCP (Ben Mesander) | "Cash is more important than | | ben%servalan.UUCP@uokmax.ecn.uoknor.edu | your mother." - Al Shugart, | | !chinet!uokmax!servalan!epmooch!ben | CEO, Seagate Technologies |