How to Setup a Randomising Function
By Arbitrary Constant2007-11-17
Defining a randomising function
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Once you have an
array from which
to pick a random entity, there needs to be a function that will deliver
a random result to pick said entity. As you would expect, there are
many ways to do this and the following method is one example. In it,
the script utilises the time and date to pick a random entity from the array. It is given by the following:
rnd.today=new Date();
rnd.seed=rnd.today.getTime();
function rnd()
{
rnd.seed = (rnd.seed*9301+49297) % 233280;
return rnd.seed/(233280.0);
};
function rand(number)
{
return Math.ceil(rnd()*number);
};
The first two lines define two elements, based on the date and time,
that are to be used in the next line, which is the function
rnd().
This function is defined basically as a little sum which uses the time
and date as taken before which in turn is then used in the function rand(number) to define a function that will return a random number based on the time and date.
Tutorial Pages:
» How to set up a randomising function
» Defining your entities
» Defining a randomising function
» Displaying the random entity
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