CODEWITHSUNDEEP
crandomlcg
user19894515
user19894515

Reputation:

How can I made a "non sequential" Random Number Generator LCG?

I recently created a RNG LCG, the formula is:

newSeed = (131173 * actualSeed + 27) % 262144;

But I have a question, this RNG is used to introduce a single seed and then it will generate a sequence. But I, for other reasons, need to introduce a seed for each number that is governed by: n * x, n is any number and x is the x coordinate, with this I achieve that if n is a seed and I want to generate a random map , will always generate the same.

The problem is that doing this is the equivalent of:


y = (131173 * x + 27) % 262144

and this gives numbers that grow and return to zero when 131173 * x + 27 is equal to 262144(m), this does not give the illusion of being random, I have tried that when introducing the seed, the seed is modified so that the resulting numbers are with an aspect more random, but I don't know if this works well, I need advice.

I have tried that when the seed is entered, the seed is:

x * x

, and after

(x * x) | n(seed)

, this does give me a more random look, but I don't know if it's the best way to solve my problem.

Upvotes: 0

Views: 241

Answers (1)

LuC
LuC

Reputation: 413

The usual start for PRNG seed is using a time reference so that you will know that on the next round, it will start from a new seed.

A classic for the standard library srand is in fact

srand (time(NULL));

Upvotes: 0

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