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- Path: informatik.tu-muenchen.de!fischerj
- From: fischerj@informatik.tu-muenchen.de (Juergen "Rally" Fischer)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Demo/game to OS friendly part II
- Date: 12 Jan 1996 18:52:55 GMT
- Organization: Technische Universitaet Muenchen, Germany
- Distribution: world
- Message-ID: <4d6am7$i9k@sunsystem5.informatik.tu-muenchen.de>
- References: <38231819@kone.fipnet.fi> <4cgsn7$ke3@maureen.teleport.com> <38231852@kone.fipnet.fi> <pAWUx*Wha@aargh.incubus.sub.org> <4cpn2c$ong@sunsystem5.informatik.tu-muenchen.de> <4cq3om$j5a@serpens.rhein.de> <4csu3p$oa6@sunsystem5.informatik.tu-muenchen.de> <4cu1jn$1n7@serpens.rhein.de> <4cv7mb$dn6@sunsystem5.informatik.tu-muenchen.de> <4d0k83$atl@serpens.rhein.de>
- NNTP-Posting-Host: hphalle8a.informatik.tu-muenchen.de
- Originator: fischerj@hphalle8a.informatik.tu-muenchen.de
-
-
- In article <4d0k83$atl@serpens.rhein.de>, mlelstv@serpens.rhein.de (Michael van Elst) writes:
- |> fischerj@Informatik.TU-Muenchen.DE (Juergen "Rally" Fischer) writes:
- |>
- |> >well, each 2nd line blank, this would be a mega-ghostlook 1x2 mode ;)
- |>
- |> Your blitterscreen looks ghostly anyway :)
- |>
- |> >wow, funny. So if I use a ptr to SA_DisplayID item callinf videocontroll(),
- |> >the dualpf will be displayed as normal mode but be still dualpf seen from
- |> >screen functions ?
- |>
- |> Sorry, I cannot parse this sentence. But I guess you understood.
-
- aeh :) I mean, the videocontroll just changes bplcon to get it
- non-dualpf, but the OS still handles it as dualpf ?
-
- |>
- |> >mhm how to scroll 2 playfields independently ? no 2nd x or y value in
- |> >rasinfo.
- |>
- |> You should read the system documentation at least _once_.
-
- yes, I read scrollvport, which said to poke the x and y.
- so where's x2 and y2 ?
-
- |>
- |> >the problem is this will give stripe look, even worse than gost look
- |> >which needs to rewrite horiz shift each line :\
- |>
- |> You have no idea.
-
- no idea about _what_ ? ;) I do have a clue about needing $102 beeing
- written each scanline to get ghost-look. I know that only stripe look
- is possible without this. So what ? :)
-
- |>
- |> >another problem: the sprites. I need them all for masking, but OS won't
- |> >give me I suppose.
- |>
- |> You have _no_ idea.
-
- So may I interpret this answer as "there is a way to get all 8 for my
- screen" ? which way ?
-
- |>
- |> >And finally, doing it on hires for a 1x1 screen, I will run out of
- |> >sprites and have to use copper to get such a big sprite area...
- |>
- |> That's your problem. Fortunately it makes little sense to use a
- |> hires screen.
-
- Unfortunately not, I also was looking forward to just doing a plain
- openscreen for the 1x1 version, but the method, allthough more plane
- dma, only needs 3 passes vs. 4 passes doing the normal way.
-
- So if a cpu can do 2 passes, you get almost factor 2 faster
- "blitter limited maximum framerate", as only 1 instead of 2 passes
- are left to do.
-
- |>
- |> --
- |> Michael van Elst
- |>
- |> Internet: mlelstv@serpens.rhein.de
- |> "A potential Snark may lurk in every tree."
- ------------------------------------------------------------------------
- fischerj@Informatik.TU-Muenchen.DE (Juergen "Rally" Fischer) =:)
-
-