How do I set sprite instances to random but no two the same?

Hi,

I have 4 instances of a sprite object with 12 frames.

On sart of layout, I set sprite to random(0,11).

But sometimes 2 or more of the sprites show the same frame.

How can I ensure that no two frames are the same?

Thank you

Hi

You have to safe the random number generated and if the next random number generated matches a previous one you have to again the random number generator.

One idea is to use a text list and use and remove one item at a time.

global text frameList=",0,1,2,3,4,5,6,7,8,9,10,11,"

global number randFrame=0

Start of layout

For each sprite

--- set randFrame to tokenat(frameList, random(1, tokencount(frameList, ",")), ",")

--- set frameList to replace(frameList, ","&randFrame&",", ",")

--- sprite set animation frame to randFrame

Another idea that equalizes eventually is:

repeat 12 times

Sprite animation frame is loopindex

system compare sprite.pickedcount > 1

--- sprite set animation frame to int(random(12))

Or if you want to make it work in one tick you can do this:

global number unique = 1

while

unique=1

--- set unique to 0

------ repeat 12 times

------- Sprite animation frame is loopindex

------- system compare sprite.pickedcount > 1

---------- sprite set animation frame to int(random(12))

Thanks!

I'll try those solutions.