How to random with differrence number in XNA game?

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Hi everyone,

I am developing my own game and I have a problem with Random().

When game runs, the Random() merely gives me a same number.

C#

if (seconds % 5 == 0 && seconds != 0 && animal_appearance == false)
           {
               animal_appearance = true;
               Last_animal += seconds;
               anime_Index =new Random().Next(9);
           }

My first run: Random() give me 6 and then after 10 seconds it again gives me 6.
On my second run as first run but 1 instead of 6

I am really have no idea of this.

Sincerely.

Posted 20-Oct-11 10:30am

Tokisan

Updated 20-Oct-11 10:42am

André Kraak

v2

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Solution 2

thx^^.
Sr for being late.
I have been busy recently. Thx for ur answer.
I will try my best.
Thx alot.
Sincerely.

Posted 23-Oct-11 3:49am

Tokisan

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André Kraak 23-Oct-11 10:07am

If you have a question about or comment on a given solution use the "Have a Question or Comment?" option beneath the solution. When using this option the person who gave the solution gets an e-mail message and knows you placed a comment and can respond if he/she wants.

Please move the content of this solution to the solution you are commenting on and remove the solution.
Thank you.

[no name] 24-Oct-11 10:01am

Also you should click accept if a solution meets your needs.

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N_tro_P · Accepted Answer · 2011-10-20T10:39:00

You are making a common mistake for random numbers.

See the MSDN Documentation on Random[^] Seeding.

Random numbers are actually pseudo random and the clock is used by default for its seed (you can provide your own though).

To solve, you can make a single random object and have your own seed value (int) rather than the default.

C#

Random _randSeed = new Random(GetSavedSeedValue());//Get a seed value from somewhere
...
if (seconds % 5 == 0 && seconds != 0 && animal_appearance == false)
            {
                animal_appearance = true;
                Last_animal += seconds;  
                anime_Index = _randSeed.Next(9);
            }