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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: doubling pixels horizontally
- Date: 29 Feb 1996 16:16:28 GMT
- Organization: Technische Universitaet Muenchen, Germany
- Distribution: world
- Message-ID: <4h4jgs$n9l@sunsystem5.informatik.tu-muenchen.de>
- References: <4f4ibc$gl9@news.cs.tu-berlin.de> <591.6610T1165T2102@login.eunet.no><1045.6611T753T2256@vip.cybercity.dk><4faoe1$47@sunsystem5.informatik.tu-muenchen.de><2991.6612T1034T625@vip.cybercity.dk><576.6613T1070T1730@login.eunet.no><1257.6614T57T922@vip.cybercity.dk><1225.6615T1229T800@login.eunet.no><1140.6616T51T1538@vip.cybercity.dk><3764.6622T781T478@ifi.uio.no><4gbkq8$104@sunsystem5.informatik.tu-muenchen.de> <2038.6625T1088T2898@ifi.uio.no> <2379.6627T121T1144@vip.cybercity.dk> <2428.6629T1299
- NNTP-Posting-Host: hphalle2i.informatik.tu-muenchen.de
- Originator: fischerj@hphalle2i.informatik.tu-muenchen.de
-
-
- |> >> You have to set up 2 different UserCopperList.
- |> >> One for normal modes (PAL/NTSC etc) and one for double-scan modes.
- |> >> (DBLPAL/DBLNTSC)
- |> >You don't even need to use the UserCopperList. All you have to do is to open
- |> >a Dual playfield screen, and then use VideoControl to turn of the dual
- |> >playfield bit in bplcon0 (tag VC_DUALPF_Disable). Now you have a way of
- |> >scrolling the even and odd bitplanes independently and thats what you need
- |> >for a blitterscreen. Mask out the unwanted pixels with system sprites and
- |> >flip every frame to make it look like a real 2x2. This way you don't have to
- |> >scroll each line idependently.
- |>
- |> I have to scroll every line independently if I'm using sprite-
- |> dithering. Because its not only the sprite-dithering that moves but the
- |> graphics as well.
-
- he describes a way to do stripe look, not ghost look :)
-
- stripe look: looks not as smooth as ghost lock but is symetric
- better for lines.
-
- laced stripe look: what a mess! much worse than PAL laced...
-
- |>
- |> Anyway, that VideoControl control stuff could be a good idea. Have you tried
- |> it?
- |>
- |> > lists on colour changes. When FALSE, graphics won't update
- |> > the intermediate copperlists, so ScrollVPort(),
- |> > ChangeVPBitMap() and colour loading functions will be faster.
- |> > This value is TRUE by default. (V40)
- |> >This means CopperList rendering will become faster. Thats all what I got for
- |> >now in exploring the Amiga system. Fill me in on any interresting results you
- |> >have got, Thanks!
- |>
- |> Thanks it should be worth looking at. :)
-
- V40 mhmhm. why didn't they put 1x2 in V39 already grrrrr.
- They began thinking about games when they built CD32. too late.
-
- |>
- |>
- |>
- |> <sb>Ludde - Amiga Demo Coder
- |> <sb>Virtual Reality & Official Be developer
- |> <sb>ludvigp@ifi.uio.no
- |>
- ------------------------------------------------------------------------
- fischerj@Informatik.TU-Muenchen.DE (Juergen "Rally" Fischer) =:)
-
-