Subject: Re: [stella] Screen shots From: "John Saeger" <john@xxxxxxxxxxx> Date: Fri, 16 Jan 1998 02:01:24 -0800 |
-----Original Message----- From: Nick S Bensema <nickb@xxxxxxxxxxxx> To: stella@xxxxxxxxxxx <stella@xxxxxxxxxxx> Date: Thursday, January 15, 1998 9:49 PM Subject: Re: [stella] Screen shots >>>Hmmm... couldn't an emulator have a "deflicker" feature, which does that >>>kind of thing in real time..? I think that it could work with some games >>>that have a regular flicker pattern.. >> >>That's an interesting idea, but don't you think you would run the risk of >>developing a geme that looks great on the emulator, but when run on a real >>Atari looks poor? And what would be the maximum number of frames that would >>need to be OR'd together? Each additional frame would require additional >>CPU power to process, and the graphics engine is already the hardest part to >>get to run fast. Of course, these days it's less of a problem. > >Indeed.... however, suppose we used a 320x400 tweaked VGA mode. Put even >frames on even scanlines, odd frames on odd scanlines.... flickered objects >would merely have a Venetian-blind effect. Objects that flicker at a >different rate than once per two frames, would flicker slightly less and >slowly vibrate. And solid objects would stay solid, but they might leave >trails when they move. I like this idea. Trying to remember a previous frame and ORing with current frame gets complicated fast. You can' t just OR the images together, you want to OR player with background and get player. Also you want to paint the previous frame's player with the previous frame's player color. Doable in principle, but complex. This idea requires no memory of the previous frame. The video memory does it automatically. It's computationally cheap. Looks doable. And I've been wanting to play with the tweaked modes anyway. I was looking at 360 by 240 so that tall games could be displayed at a reasonable aspect ratio. I think there's a 360 by 480 too. -- Stella list is Administered by krishna@xxxxxxxxxxxx <Glenn Saunders> Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/stella.html +-shameless plugs-------------------------------------------------------+ | Stella documentary at http://www.primenet.com/~krishna | | Nick's VCS links via http://www.primenet.com/~nickb/atariprg.htm | | Write the best game, win framed autographs of famous Atari alumni!! | +-----------------------------------------------------------------------+
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