Message-ID:	<388228CE.2B807C34@gtcom.net>
From:	Krogg <krogg DOT no DOT to DOT spam AT gtcom DOT net>
X-Mailer:	Mozilla 4.61 [en] (Win95; U)
X-Accept-Language:	en-US,en-GB,en,ja
MIME-Version:	1.0
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: another allegro drawing question
References:	<k4mg4.371$u01 DOT 5912 AT nntp0 DOT chicago DOT il DOT ameritech DOT net>
Lines:	53
Date:	Sun, 16 Jan 2000 15:23:42 -0500
NNTP-Posting-Host:	12.16.179.80
X-Trace:	eagle.america.net 948054741 12.16.179.80 (Sun, 16 Jan 2000 15:32:21 EST)
NNTP-Posting-Date:	Sun, 16 Jan 2000 15:32:21 EST
Organization:	24hoursupport.com
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Matt Huston wrote:
> 
> Okay, I have two pong paddles that move accross the screen.  They move and
> all ,but leave a smeere accross
> the screen.  They are 150x25x8 bit BITMAPs in a datafile.  You may find this
> code useful in helping me.
> 
> Thanks,
> M. Huston
> 
> ////////////////////////////////////////////////////
> 
> void draw_pong()
> {
>  draw_sprite(BUFFER, GAMEDATA[BMPPONG1].dat, pong1_x, pong1_y);
>  draw_sprite(BUFFER, GAMEDATA[BMPPONG2].dat, pong2_x, pong2_y);
> 
>  blit(BUFFER,screen,0,0,0,0,640,480);
>  // vsync(); //It made the paddles move slower so I left it out
> }


You forgot to clear the buffer....

you can put it in like below:

   void draw_pong()
{
  clear(BUFFER);

  draw_sprite(BUFFER, GAMEDATA[BMPPONG1].dat, pong1_x, pong1_y);
  draw_sprite(BUFFER, GAMEDATA[BMPPONG2].dat, pong2_x, pong2_y);
  
  draw_any_thing_else_that_needs_to_be_drawn();


  blit(BUFFER,screen,0,0,0,0,640,480);
  
}



-- 


|"""""<`.THE PRINCE ,'>"""""""""""""""""""""""""""""""""""|
|      `.`/""""""\,','            my sig is too big,      |
|SEE HIS (  /   \ \' SEE HIS      but its really cool.    |
| FACE    \/<> <>\/   SMILE                               |
|         /   W   \          Visit my ascii art site:     |
|       ,'\_|||||_/`.  http://www.gtcom.net/~krogg/ascii/ |
|     ,','   |||   `.`.     krogg DOT no DOT to DOT spam AT gtcom DOT net    |
|____<,' TIME TO DIE `.>____Remove no.to.spam to reply____|

- Raw text -