Multiple Copperlists and Sprites

[Havie]

New question of the day!

If I set up a screen with 4 copperlists on top of each other with the required gap will each copperlist have it's own sprites or will the sprites be copperlist independent?

I ask because I am writing a game with parallax scrolling and there are separated areas of the screen (that don't overlap) that I am scrolling at different speeds but software scrolling is quite slow and CPU intensive and it would be great to hardware scroll different sections of the screen. The only way I can see to do this is to have separate copperlists and hardware scroll each one. is this even possible and how does this affect sprites?

Or is there a better way that I am not aware of?

Hope this all makes sense???

[Daedalus]

Sprites are per-CopList, so each CopList will have 8 independent sprites available. This means that you could have 32 sprites on screen with 4 CopLists, but each sprite will be confined to its CopList and unable to move to another (or onto the blank gap between them).

[Havie]

That's what I thought - shame.

So what's the best way to do multiple scrolling zones for a parallax effect?

[Daedalus]

Hmmm, well without resorting to a lot of poking around in the chipset registers, the DisplayScroll command might be worth investigating. I haven't used it myself, but it allows you to position a bitmap at different positions per line. I've never used it myself, but I would suspect that it could help you with some creative bitmap arranging.

[Havie]

Thanks - will have a look at this and report back.