# Percentage of chance

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Meiji    102

Hello,

So I'm working on a game using HeroCloud, and I have a question. There's a character with, say, 5% chance to hit his target critically. How do I accomplish that he actually has 5% chance to do something?

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fastcall22    10838
Not sure about HeroCloud, but generally you get a floating point number between 0 and 1, and test if it's equal to or lower than 0.05:
crit_chance = 0.05
if rand_float(0,1) < crit_chance
damage *= 1.5

For a more "natural" random, you increase the 5% chance by some rate for every failure and reset it when it succeeds:
if rand_float(0,1) < (crit_chance + error)
damage *= 1.5
error = 0
else
# Increase chance by 6.75%
error += crit_chance * 0.0675

EDIT: Juliean is correct, I done goofed. Edited by fastcall22

Meiji    102

Thanks.

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Juliean    7068

@fastcall22:

Does this code really do what you expect of it? You are adding crit-chance * 1.0675 to the error everytime, which will increase the chance of success rapidly (100% on the first failure, etc). Didn't you mean

   # Increase chance by 6.75%
error += crit_chance * 0.0675f;


or something along those lines?

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