Re: A83: Background routine...

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Re: A83: Background routine...


Well, sure, the only programs you've seen that use scrolling backgrounds,
where the scrolling backgrounds are such a big part of the game that they can
be considered ok, are fighting games. The only games you can _imagine_ in
which scrolling backgrounds are ok are fighting games. But going from there to
saying that there _aren't_ or even _won't be_ such a thing as a non-fighting
game in which scrolling backgrounds are ok to use, is in my opinion, well,
wrong.

Linus

On 07-Sep-98, Harper Maddox wrote:

>OHHH... k

>what have you done using scrolling backgrounds?

>Im saying its only logical to use it in a fighting game where the background
>would take up 2 screens at the most (im contemplating this for Punchout 83s
>background)

>if you are using it for a different type of game, say RPG.. then you would
>run out of memory with roughly 5x5 screens of information.

>-Harper Maddox

>jerky@ebicom.net
>IRC nick: Geori
>ICQ: 1214597

>-----Original Message-----
>From: Linus Akesson <lairfight@softhome.net>
>To: Harper Maddox <assembly-83@lists.ticalc.org>
>Date: Monday, September 07, 1998 11:45 AM
>Subject: Re: A83: Background routine...


>>
>>wrong.
>>
>>Linus
>>
>>On 07-Sep-98, Harper Maddox wrote:
>>
>>>the only practical application of a scrolling background is for a fighting
>>>game
>>
>>>-Harper Maddox
>>
>>>jerky@ebicom.net
>>>IRC nick: Geori
>>>ICQ: 1214597
>>
>>>-----Original Message-----
>>>From: Scott Dial (Revenant) <homosapian@geocities.com>
>>>To: assembly-83@lists.ticalc.org <assembly-83@lists.ticalc.org>
>>>Date: Monday, September 07, 1998 10:51 AM
>>>Subject: Re: A83: Background routine...
>>
>>
>>>>
>>>>I have to say I hate people like that, but how is this gonna help much
>>>>if you are making a game? By doing this you have to have a full fledge
>>>>picture for each piece of screen. That's way too big to use for a
>>>>side/vertical scroller. I have one that uses sprites for a side scroller
>>>>and would do the same thing for a game. Except it keeps crashing. If you
>>>>want to debug it and use it then cool.
>>>>
>>>>James Matthews wrote:
>>>>>
>>>>> I know my tutorials are slow coming out, but senior year + college
>>>>> apps + ThinkQuest + Monopoly (programming) + chicks...um, tutorials
>>>>> are waaaay down there :)...anyway, here is my Background tutorial.
>>>>>  Thanks to Movax (ey?)....
>>>>>
>>>>> Tutorial 39: Scrolling Background.
>>>>> More Game Techniques.
>>>>> Introduction.
>>>>> Well, after attempt after attempt at finding or writing a decent
>>>>> scrolling routine.  I'm talking to Movax, and he's like "Hold on", 5
>>>>> minutes later I'm running a perfect scrolling routine he'd just
>>>>> written (don't you hate people like that! =Þ).  Thanks a lot to Hannes
>>>>> "Movax" Edfeldt.
>>>>>
>>>>> New Commands.
>>>>>
>>>>> _getk - I've covered this briefly before.  Here's the formal
>>>>> coverlike BASIC getkey.  Returns value of the key to OP1.  Values are
>>>>> shown the Ti-manual.
>>>>>
>>>>> The Code.
>>>>>
>>>>>  ld    hl,picture ;Load your pic.
>>>>>  ld de,PLOTSSCREEN
>>>>>  ld bc,768
>>>>>  ldir
>>>>>  call  _grbufcpy_v
>>>>>
>>>>> loop:
>>>>>  call _scrollright
>>>>>  call _grbufcpy_v
>>>>>
>>>>>  call    _getk    ; Key to OP2.
>>>>>  call    _op2toop1
>>>>>  call    _convop1
>>>>>  cp  45 ; If clear
>>>>>  jp      nz,loop ;
>>>>>  ret
>>>>>
>>>>> _ScrollRight:
>>>>> ld de,12
>>>>> ld hl,8e29h-1
>>>>> ld b,64 ; 64*12=768 bytes to rotate
>>>>> _loop1:
>>>>> push hl ; Test if there's a bit to wrap around
>>>>> add hl,de
>>>>> ld a,(hl)
>>>>> and 00000001b
>>>>> sub 00000001b
>>>>> ccf
>>>>> pop hl
>>>>>
>>>>> inc hl ; We'll waste space here to gain some speed
>>>>> rr (hl)
>>>>> inc hl
>>>>> rr (hl)
>>>>> inc hl
>>>>> rr (hl)
>>>>> inc hl
>>>>> rr (hl)
>>>>> inc hl
>>>>> rr (hl)
>>>>> inc hl
>>>>> rr (hl)
>>>>> inc hl ; We'll waste space here to gain some speed
>>>>> rr (hl)
>>>>> inc hl
>>>>> rr (hl)
>>>>> inc hl
>>>>> rr (hl)
>>>>> inc hl
>>>>> rr (hl)
>>>>> inc hl
>>>>> rr (hl)
>>>>> inc hl
>>>>> rr (hl)
>>>>>
>>>>> djnz _loop1
>>>>>
>>>>>  ret
>>>>>
>>>>> picture:
>>>>> ;Put your picture here.
>>>>>
>>>>> .end
>>>>> END
>>>>>
>>>>> Conclusion.
>>>>> Thanks again to Movax for this routine!  This should help all of you
>>>>> game freaks out there!  If you come up with a better routine that
>>>>> scrolls left/right, up/down, or all directions, please contact me!
>>>>>  Thanks.
>>>>>
>>>>> {button , Klink(Scrolling;Movax;Graphics)} Related Topics.
>>>>>
>>>>> Addition:  if you come up w/a routine that is *well documented*
>>>>> contact me :)...
>>>>>
>>>>> Later,
>>>>>
>>>>> James Matthews (matthews@tkb.att.ne.jp)
>>>>>
>>>>> ICQ: 7413754
>>>>> http://home.att.ne.jp/gold/tomcat21/index.html
>>>>> http://library.advanced.org/18242/
>>>>
>>>>--
>>>>Scott Dial
>>>>revenant_1@hotmail.com
>>>>ICQ#3608935
>>>>
>>
>>
>>
References: