Subject: Re: [stella] time to stick me with a fork? From: KirkIsrael@xxxxxxxxxxxxx Date: 14 Mar 2004 14:03:40 -0000 |
> >I finally have a "release candidate" for JoustPong! > >http://alienbill.com/joustpong/20040313.source.txt > >http://alienbill.com/joustpong/20040313.bin > > It might be a bit late, but one bug and one suggestion: > > When you're sitting on the bottom, sometimes flapping doesn't have any > effect. The wing flaps, but the paddle doesn't move. I couldn't figure > out any pattern as to when exactly it happened. Flapping again always > gets the paddle moving, but it does throw off your timing pretty badly. I'll look into it. At first I thought I thought "feh, it's just intertia he's seeing, original Joust had a similar effect" but now I kind of see what you mean. Interestingly, I think it's more likely to happen when you let the player sit for a while...almost as if I kept the downward speed due to gravity going when it was sitting there, but not quite (it would take a lot more strokes to build up any velocity in that case) I'm almost tempted to leave it, and say that the bug is that the just-printed manual should say that if you stay at the bottom, you're likely to sink into the mud...because that's *exactly* what it plays like. Anyway, this is the relevant code: ---- ;-------------------------------------- ;SEE IF PLAYER 0 HIT FLOOR ;-------------------------------------- ;check if player 0 hit floor lda #FLOOR_HEIGHT_FOR_PLAYERS ;10 is floor cmp slowP0YCoordFromBottom+1 bcc DoneCheckingHitFloorP0 ;cut downward speed by half and reverse it for nice rebound effect ;divide by 2, preserving negative lda slowP0YSpeed+1 ; HIGH byte! cmp #128 ror slowP0YSpeed+1 ror slowP0YSpeed ; LOW byte! ;negate result sec lda #0 sbc slowP0YSpeed sta slowP0YSpeed lda #0 sbc slowP0YSpeed+1 sta slowP0YSpeed+1 lda #FLOOR_HEIGHT_FOR_PLAYERS sta slowP0YCoordFromBottom+1 ;putplayer on floor DoneCheckingHitFloorP0 ---- Could something be going wrong with the divide by 2 preserving sign, then negating? Like some how instead of staying small negative/positive, it switches to large for a second, but isn't a more noticable problem because of interaction on the next frame? Any thoughts on this, gang? > Suggestion - After a score, cap the ball's vertical velocity so that its > angle is no more than 45 degrees off horizontal. If you (or the computer) > get scored on by a ball moving at a high vertical angle, it's too easy to > miss the next three or four in a row. (If you like it that way, keep it, > of course. :) ) I do like it. I like encouraging/rewarding the reckless "hit the ball at high speed" style of play. Of course Pterry sometimes is there to make it the other players problem...and in Poorlords, often the player misses it incoming but hits it outgoing (they should just be grateful I made the pong bats "1 way" so they didn't do damage to themselves ala Warlords :-) so the ball likely mellows out as it passes through the player. > I wasn't aware that those few private mails I dropped you were worthy of a > T-shirt, but if you think so, I'll take it, sure. ;) Cool, reply to this msg but send me private email w/ your address. (i.e. keeping "[stella]" in the subject will help ensure your mail gets through my spam filter.) -- KirkIsrael@xxxxxxxxxxxxx http://kisrael.com Frickin' god! He's such a goodie good. --http://www.advancednet.net/objectcity/o.htm ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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