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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: 10 Jan 1996 02:18:51 GMT
- Organization: Technische Universitaet Muenchen, Germany
- Distribution: world
- Message-ID: <4cv7mb$dn6@sunsystem5.informatik.tu-muenchen.de>
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- Michael van Elst (mlelstv@serpens.rhein.de) wrote:
-
- : the previous viewport. However, with the current OS you still get
- : at least 1 blank line that you have to hide somehow.
-
- well, each 2nd line blank, this would be a mega-ghostlook 1x2 mode ;)
-
- : >anyway for blitterscreen I need the odd planes beeing shifted one pixel
- : >more than the even ones, hardly any OS-routine will get the registers
- : >into that state :\ solutions ?
-
- : requires OS3.x. open a dual-playfield viewport or screen. then use
- : the VideoControl() function or SA_VideoControl taglist to disable
- : the dual-playfield mode. This leaves you with two independently
- : scrollable bitmaps without the normal dual-playfield priority logic.
-
- 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 ?
-
- mhm how to scroll 2 playfields independently ? no 2nd x or y value in
- rasinfo.
- the problem is this will give stripe look, even worse than gost look
- which needs to rewrite horiz shift each line :\
-
- another problem: the sprites. I need them all for masking, but OS won't
- give me I suppose.
- 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...
-
- : Regards,
- : --
- : Michael van Elst
-
- : Internet: mlelstv@serpens.rhein.de
- : "A potential Snark may lurk in every tree."
-