From:	Ville Lundberg <vlundber AT cc DOT hut DOT fi>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Scrolling+sprites
Date:	Wed, 19 Nov 1997 15:48:06 +0200
Organization:	Helsinki University of Technology
Lines:	28
Distribution:	inet
Message-ID:	<3472EE16.41C6@cc.hut.fi>
NNTP-Posting-Host:	beta.hut.fi
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Hi!
When I found DJGPP and Allegro, I thought that NOW is the time to move
on to C from QBasic, so I'm quite new at this. But now I have a really
basic problem I just can't find an answer to anywhere else, so now I try
here:
In my game, the playground have to scroll while ca 15 sprites moves
around it. But when I do this, by mixing double buffering and Allegros
scroll_screen, the sprites flicker; they create "ghost" images, when
running across the scrolling screen. It'looks terrible. My game uses
ModeX and I use the following logic:
 move sprites co-ordinates;
 scroll_screen;
 blit(background to buffer);
 blit(sprites to buffer);
 blit(buffer to screen);
This is how someone told me how to do it, but it still doesn't work.
I would be really glad if someone could help me, because the game is
almost ready otherwise.

 Thanks,
 Ville Lundberg



 =-----=
Ville Lundberg @ Helsinki University of Technology, Department of
Materials Science and Rock Engineering.
vlundber AT cc DOT hut DOT fi www.hut.fi/~vlundber

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