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  making a random distribution algorithm  (Read 933 times)
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Offline ngash2

Junior Newbie





« Posted 2013-04-30 18:17:25 »

Hi guys,

I am developing a mancala game where at the start of the game a player distributes some 16 seeds into their pit 1-7.

     7     6     5

1   2     3     4
   
can anyone tell me how i can distribute the seeds randomly such that pit 5-7 are never empty.

Thanks,
ngash2
Offline Mac70
« Reply #1 - Posted 2013-04-30 18:22:00 »

I think you can make something like this (pseudocode):

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Random random = new Random();

while (seeds<16) {
pit[random.nextInt(7)]++;
seeds++
}

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Offline Riven
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« Reply #2 - Posted 2013-04-30 18:26:06 »

Quote
...such that pit 5-7 are never empty.
Hm... that's an odd requirement.


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int pitCount = 7;
int seedCount = 16;
int mandatoryPits = 3;

int[] pits = new int[pitCount];
Random r = new Random(...);

// put 16-3=13 seeds in 7 pits
for(int i=0; i<seedCount - mandatoryPits; i++) {
   pits[r.nextInt(pitCount)]++;
}

// for the last 3 seeds, ensure that pit 5,6,7 are not empty
// if already not empty, just put the seed in a random pit
for(int p=pitCount-mandatoryPits; p<pitCount; p++) {
   if(pits[p] == 0) {
      pits[p] = 1;
   }
   else {
      pits[r.nextInt(pitCount)]++;
   }
}

// this is more 'random' than pre-filling pit 5,6,7 with seeds,
// and then randomly distributing the remaining 13 seeds

persecutioncomplex

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Offline ngash2

Junior Newbie





« Reply #3 - Posted 2013-04-30 19:19:56 »

Thank you for your replies , i really appreciate your help.
Offline ReBirth
« Reply #4 - Posted 2013-05-01 10:44:41 »

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int used = 0;
pit[5] = random(); used += pit[5];
pit[6] = random(); used += pit[6];
pit[7] = random(); used += pit[7];
int available = 16 - used;
//distribute available seeds to other pits

Offline Riven
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« Reply #5 - Posted 2013-05-01 10:54:35 »

At least test your code does what it is supposed to do Clueless

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Offline ReBirth
« Reply #6 - Posted 2013-05-01 12:03:16 »

Sorry I didn't really compile it or what but simply pseudo-code. But that was my solution for (what I understand from) the problem.

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