Re: A82: Side-Scrolling


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Re: A82: Side-Scrolling




If you want to scroll right, use RR instead of RL

~Adamman

In a message dated 12/12/99 10:15:22 PM Eastern Standard Time, 
evil_sam@hotmail.com writes:

> Does anyone have any ideas on how to smooth scroll (pixel by pixel) a 
>  picture onto the screen horizontally? The only minor snag is that the 
>  current contents of GRAPH_MEM cannot be deleted as the new data scrolls 
onto 
> 
>  the screen (the old data scrolls off as the new scrolls on, and that is 
>  easily accomplished). The technique I'm using now treats the entire 
picture 
>  as one gigantic sprite. The current screen is GRAPH_MEM, the new screen is 
>  APD_BUF. It scrolls APD_BUF by changing the x coord and using a hacked 
>  version of CrASH_Man's PutSprClip that'll automask and work for an entire 
>  screen. The GRAPH_MEM scrolls off of the screen using a simple routine 
>  similar to CrASH_Man's Scrolling routines. My technique works, but the 
>  hacked sprite routine and utility routines take up too much room(~250 
bytes) 
> 
>  for such a trivial effect. Zelda will be a pretty tight budget of space, 
so 
>  I really can't afford to waste space unneccessarily. Any thoughts?
>     Sam
>  
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