scrolling background IPAD

Oxygen

hello there !!!
I'm trying to make a scrolling background for an IPAD game.

this method by Quantumsheep works very well for iphone landscape, portrait but i don't know why this does work with IPAD portrait !?!

I tried this method with a background picture of 768*1024
thanks for help

"quantumsheep said:
You can make your background like this:

Say it's a starfield. Actor size doesn't matter - when you place it in your scene, just stretch it so it fills the screen.

This actor will contain the following

A movement behaviour (say direction 180, speed 90 if you're doing a side scroller).

Then underneath this a single rule:
When
Attribute self.position.X < - self.Size.Width /2

Change attribute self.position.X to self.Position.X + self.Size.Width + game.Display Size.Width

Then, put the actor in your scene as described above, and add a second instance of the actor next to it of equal size.

This will allow smooth scrolling, and will mean you can get rid of the wrap.

Hope that helps "

Oxygen

nobody there?

quantumsheep

Actually, I have the same problem on the iPad myself!

Would be interested in a solution too!

QS

jonmulcahy

I think maybe it's because the image is so large, instead of two images, try cutting them so its four of them. I'll see if I can make a demo tonight.

Oxygen

Oh Quantumsheep, u too, sorry for the message i didn't know.

Ok jonmulcahy, i'll try this too

thanks guys for those answers

Oxygen

Ok guys it works very fine : here is the method from Jonmulcahy based on Quantumsheep code :
we needs an actor with size of 768*512 (half of the scene height)
In this actor :

move direction 270

rule when self.position.Y < -self.size.height/2
change attribute self.position.Y to self.postion.Y+self.size.height+game.display.size.height

after that, place this actor at position 384, 256 then a copy at 384,768 and finally another copy at 384,1280

here we go !!! tested to a speed at 2000, impressively smooth !!!!

thank you guys

jonmulcahy

Fantastic. Glad that worked.

GS does some funny things when you get far enough off screen

quantumsheep

Nice one! Will have to try it out!