home *** CD-ROM | disk | FTP | other *** search
- Path: ifi.uio.no!usenet
- From: ludvigp@ifi.uio.no (Ludvig Pedersen)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: TMapping again!
- Date: 1 Feb 1996 19:38:05 GMT
- Organization: Dept. of Informatics, University of Oslo, Norway
- Message-ID: <1322.6605T742T443@ifi.uio.no>
- References: <38232182@kone.fipnet.fi> <1019.6602T1224T1930@ifi.uio.no> <38232237@kone.fipnet.fi>
- NNTP-Posting-Host: gymir.ifi.uio.no
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP)
-
- >> >Square roots usually can be eliminated totally, luckily.. ;)
- >> >I have come to the conclusion with the guy (Ludvid Petersen) who
- >> >wrote the original 3d rotation routine using a log table and
- >> >only adds and moves, that it is not that much faster. On the 68060
- >> >it is slower..
- >> Nice spelling! Anyway I don't know how bad my names sound in finish. ;)
- >Sorry, I remembered how to write Ludvig (pure writing error)
- >but I did not remember was it "t" or "d" in your name.
- >Anyway, it sounds very normal.
- It doesnt matter, I'm still happy! :)
-
- >> My friend Patrick Hanevold wrote a fast log routine (without any Zero
- >> or Negative test) which I think was released in this news group some
- >> time ago!?
- >Yep.
-
- >> It was a little faster than my 9 muls.l version on a 030/50mhz and a
- >> little slower on a 040/25mhz.
- >How much faster on a 030/50 and how much slower on a 040/25?
- >Did you try without the data cache on the 040? It really
- >can make a difference with such a miserable memory subsystem.
-
- Don't remember exactly and we didn't try with data cache OFF on 040.
-
- But I think it was plus/minus 100-300 points rotated per frame in
- both cases. (We used a loop that rotated as many points possible in a frame.)
-
-
-
-
- <sb>Ludde - Amiga Demo Coder
- <sb>Virtual Reality & Official Be developer
- <sb>ludvigp@ifi.uio.no
-
-