Yars revenge 'safe zone' effect in player sprite?

[Coolcrab]

Is there a simple way to get the yars revenge safe zone effect into the player sprite? I tried pointing the color to some random adres Banks, but most don't do anything interesting and don't give a psychadellic number. The best I found was playfieldpos as it loops between 1-8.

 

In my current code it also colours the entire player in one solid colour. I imagine that a better way is possible where every row has its own color?

[+Karl G]

Assuming you are talking about bB, here's a link to a post that discusses this:

 

http://atariage.com/forums/topic/120680-how-to-do-something-similar-to-the-ion-field-in-yars-revenge-in-asm/?do=findComment&comment=1464818

[RevEng]

Here's another that randomizes a player (instead of the playfield) from the bB tricks thread.

 

(assumes standard kernel)

[+Karl G]

Oh - I guess I didn't read that closely enough. Doing that with a sprite and a mask makes me think of Downland.

[Coolcrab]

Here's another that randomizes a player (instead of the playfield) from the bB tricks thread.

 

(assumes standard kernel)

If I get it correctly this doesn't change the color but the shape right? You just get a messy block of stuff. Right now I changed the color to a random number.

[+Karl G]

If I get it correctly this doesn't change the color but the shape right? You just get a messy block of stuff. Right now I changed the color to a random number.

 

Right - a messy block of stuff like the Yars Revenge safe zone. If you were doing it line by line in assembly, you could use a mask to impose a shape. Within the constraints of bB, all I can think of offhand is to use the other player sprite, set it to the background color, and have the inverse of the desired shape to hide the unwanted pixels.

[RevEng]

If you want to randomize the color, but not the player pixels, then modify the yars example to include these constants:

 

 const player0colorlo=player0color
 const player0colorhi=player0color+1

and then change each reference of "player0pointer" to "player0color". (assuming you're using the playercolors option for P0, or player1colors option for P1)