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Newcomers DBPro Corner / Random Function

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Dextro
19
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Joined: 26th Feb 2005
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Posted: 16th Aug 2006 05:02
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I have a problem that has been bugging me for quite some time now (10 years).
How do I make a truly random function that doesnt repeat numbers?

I remember once trying using 2 arrays, 1 to store a number, and a second one that would hold an "x" if that array element was already occupied, or a "_" if not.
I'm sure this is not the best way to go, so, anyone could help me out?
Specifically, I'm trying to make a Blackjack game (52 cards).
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Daemon
18
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Joined: 16th Dec 2005
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Posted: 16th Aug 2006 05:21
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I can help more if you explain more, but I am not quite sure what you are trying to do. This displays numbers 1-52 in a random order if that is a help to you.



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Dextro
19
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Posted: 16th Aug 2006 05:53
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Thanks a lot, thats exactly what I was looking for
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hyrichter
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Joined: 15th Feb 2004
Location: Arizona
Posted: 16th Aug 2006 08:48 Edited at: 16th Aug 2006 08:49
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Just put randomize timer() at the top of your code. That seeds the random number generator with whatever number the Timer() function happens to have at that moment, so you get true randomness.

Edit:
It would be a good idea to put Randomize Timer() each time you enter into an area for calculating random numbers. The more times it gets called, the more random your numbers will be.

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IanM
Retired Moderator
22
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Joined: 11th Sep 2002
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Posted: 16th Aug 2006 20:03
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I agree with your first sentence and disagree strongly with your second.

The randomize command just sets the seed for the number generator. If you have a function with the randomize command in and you call it several times within the same millisecond you will get the same number out every time. As machines get faster, this becomes more and more likely.

Call randomize once at the start of your program, at the start of a game, or at the start of a level. There's no point in calling it more often and a chance that you'll make it less random if you call it more often.

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