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Randomize numbers without having the same value occuring twice?
Hi,
Let’s say I have ten layers of text. By an expression I’d like to assign text of sourceText a value between 1 and 10. I want them to be randomly ordered, but never to occur twice within my 10 text later. So, the result could look something like this (layer by layer):
[5, 3, 1, 8, 2, 9, 4, 7, 6]
But never, for instance:
[5, 3, 1, 1, 2, 9, 4, 7, 6]
Is there a way to accomplish this?
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1 Reply
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You can make a master layer, and add this expression to text
function shuffle(array) {
var currentIndex = array.length, randomIndex;
// While there remain elements to shuffle...
while (0 !== currentIndex) {
// Pick a remaining element...
randomIndex = Math.floor(Math.random() * currentIndex);
currentIndex--;
// And swap it with the current element.
[array[currentIndex], array[randomIndex]] = [
array[randomIndex], array[currentIndex]];
}
return array;
}
var arr = [1,2,3,4,5,6,7,8,9,10];
"["+shuffle(arr).join(",")+"]"Then, to each layer add this expression. Assign firstIndex as the index of your first text layer.
firstIndex = 2;
val = eval(thisComp.layer("Master layer").text.sourceText)[index-firstIndex];
val
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