OpenEuphoria

Re: Virtual Screens and stuff in True EU

• Posted by Grape Vine <chat_town at HOTMAIL.COM> May 02, 1999
• 453 views

Yes it is for smooth scrolling... parallax scrolling i do beleve it is
called.. If you have played the game Solar Winds than you know what i am
after.. Nitrogen 2000 sugessted i use tile maps instead.. i think he is
right... this way i am only going to need 1 virual screen
Sorry for the lack of code.. i didnt post the real stuff.. jsut the
inportiant code of what i had...I will post full code(or at least as full as
i have) next time... I have univbe some place.. i went and got sitech
display doctor 6.2(i think this is the newest) a few months ago
but have not installed it since i got the S3 card(i had a Trident 9680
-I(windows version) and needed it.. I ~think~ i have the neil lib but not
sure... I will look at it soon

Thanx,
  Grape Vine

>personally, i have found that making individual virtual screens,
>each the size of the full screen, and simply setting the appropriate
>virtual screen onto the display is generally faster and easier...
>however, if you are attempting smoothly scrolling screens, then your
>method is generally preferred...
>from the meager amount of code you have given in your message,
>you are doing ok so far and i think your problem is that
>TrueEU is currently _only_ for 16.7M color modes...
>at least the routines within the library that is...
>you can mix and match video modes (for example:
>the menu system might be 640x480x256 and then you
>can switch into truecolor for actual gameplay and even back
>into straight text modes for saving/loading games and whatnot...)
>but the functions in the TrueEU library only work within the
>truecolor modes...
>one noteworthy exception here:
>certain functions, after the library has been initialized, *can*
>be accessed while in other graphic/text modes, as long as
>you don't attempt to read/write to the actual screen...
>you can load targas, create your virtual screens, and other
>such things while in modes less that 16.7M and even show
>the user progress indicators/whatnot as you prepare for
>entering truecolor modes/gameplay/etc...
>
>hope this helps--Hawke'
>
>At 05:21 PM 5/1/99 -0700, you wrote:
> >I want to make one huge virtual screen ... like 2 640 screens wide and
>like
> >5 or 8 or so long...Then just access that like its a normal screen for
> >drawing the graphics then just blit out the section i want to see...What
>i
> >cant seam to do is get it to work... I use locked mem in windows(so it
>dont
> >get swaped out) i tried
> >off_screen = make_virtual_screen(1024,4800,TrueBlack)
> >then just coping it over to the screen but it didnt line up right
> >btw i uses a 320,200 screen mode to start with...not in true color.. is
>that
> >the prob or are my thoughts going down a dead end track?
> >
> >Lost and confused Grape
> >
> >
> >
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