simple visual effects, with music

[jp48]

Hi,

 

I have mostly programmed different kind of live instruments for 2600, now I am prepared to the gig, and thought if there are any tips for visual effects using Batari Basic.

 

Thanks !

[Papa]

There are two levels of hardware zooming and a switch for mirroring. You can layer sprites (although they're not really sprites, just lines of colors) to make more modern looking 'sprites' although ghosting and flickering are unavoidable. One thing I like to do is use two sprites with different color schemes side by side to make bigger and more colorful characters. If you mean effects like what is found commonly in music demos on 16-bit computers, like fancy lettering, bouncing word demos, color cycling backgrounds with techno music (like Automation disks for the 1040 or what hacker circles might use as intros) you would likely have to program something that resembles those effects rather than use something built in.

 

Do you have any music demos that could be played on Stella or put onto a Harmony cart?

[jp48]

Thanks of the reply ! I am looking for code snippets/examples for mostly random kind of scrolling effects, now I am simply built simple playfield and I randomly change COLUBK and COLUPF, which really doesn't look good at all. No, not like hacker's intros or demos, too complicated, just simple scrolling colorful random stuff, glitches etc.

 

I have a lot of music demos, they all sound like shit, will send an example when I get first that works. I am making beats/patterns, not full tracks, and a sequencer I am writing does some beats + effects, I am running 3-4 different machines on the gig, Atari 65XE, 2600, possibly Lynx and ZX Spectrum. All happily non-synced except my hands + mixer

Edited February 17, 2016 by jp48

[jp48]

OK, I have more specific example, from Atari 8-bit machines. There are a bunch of variations of short 32b demo, assembly loop here:

 

 

loop 
   lax 20 
   ora 19
   tay
  sta $d200,y 
  eor $d40b
  sta $d000,y
bvc loop 
 

 

Reading system timers, bit manipulated, and putting to values to POKEY, VSYNC etc.

 

Anything similar to 2600, with Batari or Dasm, glitchy graphics, which run long, would be visuals to chiptune gig.

 

Thanks !!