Question

I need an alternate sequence like 1, -1, 1, -1… asf. First I used if-statements for it, but it’s dumb. Then I tried something like:

int n = 1;
...
do{
   n = 0 + ( n * (-1));
} while(blabla)

It’s ok, but I have to store n value from iteration to iteration. This isn’t so pretty. How to compute that sequence from a control variable like frameCount?

Sorry, I am learning not only to code, but English too.

Answer 1

It’s not very readable, but if you’re looking for something purely “elegant,” I suppose you could do something like:

int n = 1 - ((frameCount % 2) * 2);

If you’re on an even frame you’ll be subtracting (1 – 0), if you’re on odd frame you’ll be subtracting (1 – 2).