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Help on Random functions

Started by neilski_2003 Nov 27, 2004 at 10:14 AM 2 replies 700+ views

Original Post

neilski_2003

Nov 27, 2004 at 10:14 AM

Could anyone help, or point me in the direction of some for random functions please. I'm doing an asteroids environment and i wish to generate them randomly within the environement. I would also like to have them rotate about a random axis. Cheers in advance. Neil

Arthenor

Nov 27, 2004 at 9:38 PM

If you are looking for a function to generate random values, there is srand() and rand().

srand seeds the random number generator with a value (such as the current time) and rand returns a random number within the range 0 and RAND_MAX.

neilski_2003

Nov 28, 2004 at 8:42 PM

Sorry i'm relatively new to this game so could you give me an example of how i'd use the srand() function.

The idea is that i've got an asteroid and i'd like to set it so that a random translation is put on them so they appear at random places in the world.

Once i've done that i also hope to nest in some random rotation but i'll need to understand the format of how random works before i could do that.

Cheers again
Neil

andyZER0

Nov 28, 2004 at 9:13 PM

srand() uses a "seed" to generate more random numbers. Before you start generating random numbers, it's a good idea to srand(time(0)). This takes the current time as a seed, thus, making a more random number. Then the value rand()%(n) will generate a number between 0 and n.

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