Random.seed does not work.

Questions & Answers
1

I am using Unity 3.5.7

In my Awake method I set Random.seed = 1.
In a method that gets called by OnTriggerEnter I use Random.Range(1, 5).

My problem is that setting the seed in the awake has no effect, it is always ‘random’ I never get the same random set of values.

But when I use the random.Range in the same method as setting the seed, I do get the same results:

void Awake()
{
    Random.seed = 1;
    Random.Range(1, 5);
    Random.Range(1, 5);

    Random.seed = 2;
    Random.Range(1, 5);
    Random.Range(1, 5);

    Random.seed = 1;
    Random.Range(1, 5);
    Random.Range(1, 5);
}

Am I missing something?

UPDATE:

It seems the seed is affected by time. When I start a co routine wich waits 1 sec and then outputs four random numbers with a seed of 2 I get:

2
3
3
1

But When I wait for one second then set the seed and wait 1 sec between the random numbers I get:

2
1
3
1

This is always the same, but when there is time between them it changes. Is there a way around this or do I have to create my own seed system?

2

I have made my work around for the time changing the seed.

I now have my currentSeed and a seedChanger value. Right before I call my random number I set the seed to my current seed and after I get the random number I change my seed with the seedChanger.

Something like this:

private int _currentSeed = 1;
private int _seedChanger = -12546;

public void OnTriggerEnter(Collider other)
{
    ...
    Random.seed = _currentSeed;
    int nr = Random.Range(1, 5);
    _currentSeed += _seedChanger;
    ...
}

This way I always have the same sequence that is not affected by time in between the triggers.