Randomizing

[Wright1000]

If I want to randomize something, how do I do it?

For example, I want a non-player character to choose a number between 1 and 10, how is it done?

For example, two non-player characters are playing football. I want to randomize the winner. How is it done?

[shuen]

http://www.renpy.org/wiki/renpy/doc/ref ... dom.random
http://www.renpy.org/wiki/renpy/doc/ref ... om.randint
http://www.renpy.org/wiki/renpy/doc/ref ... dom.choice

[Tachyglossus]

Ooooh speaking of randoms, this is a purely theoretical question, but is it possible to make it pull a random element from a list, but attach a greater probability to certain items for being chosen?

Using the fruit example in the reference, say you wanted oranges to be twice as more likely to be picked than apples or plums, would that be possible?

[Alex]

Mmm..., the easiest way is to add twice more oranges in a list, so the probability of choosing an orange from that list would be twice greater.
More complicated way described in a Cookbook.

[pondrthis]

Out of further curiosity, is there no built-in generator for the normal distribution? (I'm obviously changing the topic from discrete to continuous space with this question, but it's only a matter of rounding.)

[PyTom]

Ren'Py gives you all of the functions in the Python random module. It looks like the gauss function is the one you want - so renpy.random.gauss.

http://docs.python.org/library/random.html#random.gauss

[HotLimit]

Ooooh speaking of randoms, this is a purely theoretical question, but is it possible to make it pull a random element from a list, but attach a greater probability to certain items for being chosen?

Using the fruit example in the reference, say you wanted oranges to be twice as more likely to be picked than apples or plums, would that be possible?

I just write a series of "if [variable]" statements, with the range of available answers for [variable] corresponding to each of the possible items. I'm a little rusty with Ren'Py, but I believe it would go something like this:

Code: Select all

$ x = renpy.random.randint(1, 100)

if x > 0 and x < 26:
    n "You got an apple."

elif x > 25 and x < 51:
    n "You got a plum."

elif x > 50:
    n "You got an orange."

You can use any range you want for your variable, I just chose 1-100 because percentages are easy to remember in 100s (what's 50% of 100? 50!)

Plus you can always build on each possibility to make things even more diverse:

Code: Select all

$ x = renpy.random.randint(1, 100)
$ y = renpy.random.randint(1, 3)

if x > 0 and x < 26:
    if y == 1:
        n "You got an apple."

    elif y == 2:
        n "You got an orange."

    elif y == 3:
        n "You got a plum."

else:
    n "You were bit by a snake and died."

[Tachyglossus]

Thank you these are all awesome answers I'll save for later use!

[Wright1000]

Thank you, everyone.
Your help was useful.