Subject: Re: Re: Re: Re: [stella] playfield on-the-fly updates From: <kurt.woloch@xxxxxxxxx> Date: Thu, 14 May 1998 09:16:37 +0200 |
On Wed May 13 20:33:08 1998, E. Mooney wrote: >> >Q*bert and the enemy are obviously the two players. Cube body is >> >playfield. The flying discs are the unknowns. If I remember correctly, >> >they flicker (only one disc on each row is displayed per frame), so I >> >guess we'd have to assume the discs are either missile or ball, and the >> >color is changed immediately before or after display. (Notice the discs >> >don't move vertically - they disappear and Q*Bert just floats up to the >> >top by himself.) >> >> No, the discs don't flicker, but change color - but that's not very >> important. > >Sure, it's important. If they flicker, that's one disc per line per >frame; if they don't, then it's two different objects. Probably each >player's missile. OK, then it is important. Anyway, they change color, and there are up to two of them on one scanline. But I don't think they are the two player's missiles, 'cause then one of them would have to be red, like Q*bert, who is one of the players. I think they're either the other player and its missile, the other player or missile - with multiple copies - or the ball - with in-line color changes to the cube body - and the other player or missile. >> That's not quite true. On scanlines with one, three or five cubes, the >> playfield isn't symmetric, so there have to be some playfield writes in >> there, too. I suppose they use different kernal parts for each cube >> level, that's twelve kernals in all, since the ones for cubetops and >> cube bodies are also different. Anyone confirm? > >I'll hve to look at it when I get home... you've got me intrigued now >here. I think all the cube body kernels could be the same, since there >isn't any tricky timing going on during them. (quick question - are the >discs at the level of cube tops or cube body?) The disks are at the level of cube body. >> With love, >> Kurt Woloch > >With love, and no witty signoff? :) Oh, sorry! (What does "witty" mean? My english doesn't cover that!) With love (and many flying disks to jump onto) Kurt Woloch -- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/stella.html
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