You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
3.5 KiB
99 lines
3.5 KiB
#!/usr/bin/env python
|
|
|
|
"""
|
|
Calculate probability of getting at least one of a monster part from one
|
|
line in the quest rewards. Also calculates expected value of part
|
|
counts (N), and probabilities of getting a certain number of rewards (C).
|
|
|
|
usage: mhprob.py reward_percent fixed_rewards gaurenteed_rewards \
|
|
[extend_percent]
|
|
|
|
reward_percent - chance of getting the monster part in %
|
|
fixed_rewards - number of rewards in the reward list with 100% chance and
|
|
are not the item you are looking for. Takes away from
|
|
the total possible draw attempts for what you want.
|
|
Default 1 which is typical for line A in many quests.
|
|
gaurenteed_rewards - minimum number of quest rewards in the line,
|
|
including any fixed rewards. In Tri (see link
|
|
below) this is 3 for line A and 1 for line B.
|
|
Defaults to 3.
|
|
extend_percent - chance of getting one more reward in the line in %,
|
|
default 69
|
|
|
|
You can use http://kiranico.com to get reward percent and fixed rewards
|
|
values.
|
|
|
|
For extend percent, use the default unless you have the Lucky Cat or
|
|
Ultra Lucky Cat food skills or Good Luck or Great Luck armor skills:
|
|
|
|
normal extra reward %: 69
|
|
good luck extra reward %: 81
|
|
great luck extra %: 90
|
|
|
|
Can also be used to calculate chance of getting a part from carving,
|
|
using extend_percent=0, fixed_rewards=0, and gaurenteed_rewards=3 (or
|
|
4 for monsters with 4 carves).
|
|
|
|
Source:
|
|
http://www.gamefaqs.com/wii/943655-monster-hunter-tri/faqs/60448
|
|
Not sure if there are differences in 3U or 4U.
|
|
|
|
Example Plain dangerous in 3U, has 2 fixed rewards in A, one in B, hardhorns
|
|
are 5% both A and B:
|
|
A: ./mhprop.py 5 2 3 69
|
|
B: ./mhprop.py 5 1 1 69
|
|
For great luck, replace 69 with 90
|
|
"""
|
|
|
|
import sys
|
|
|
|
from mhapi import stats
|
|
|
|
if __name__ == '__main__':
|
|
# in percent
|
|
reward_percent = int(sys.argv[1])
|
|
if len(sys.argv) > 2:
|
|
fixed_rewards = int(sys.argv[2])
|
|
else:
|
|
fixed_rewards = 1
|
|
if len(sys.argv) > 3:
|
|
guarenteed_rewards = int(sys.argv[3])
|
|
else:
|
|
guarenteed_rewards = 3
|
|
if len(sys.argv) > 4:
|
|
extend_percent = int(sys.argv[4])
|
|
else:
|
|
extend_percent = 69
|
|
|
|
min_rewards = guarenteed_rewards - fixed_rewards
|
|
max_rewards = 8 - fixed_rewards
|
|
|
|
if min_rewards < 0:
|
|
print "Error: fixed_rewards (%d) must be less than or equal to " \
|
|
"guaranteeed_rewards (%d)" % (fixed_rewards, guarenteed_rewards)
|
|
sys.exit(1)
|
|
|
|
total_p = 0.0
|
|
expected_attempts = 0.0
|
|
for reward_count in xrange(min_rewards, max_rewards + 1):
|
|
p = stats._reward_count_p(reward_count, min_rewards, max_rewards,
|
|
extend_percent)
|
|
expected_attempts += p * reward_count
|
|
# probability of getting @reward_count rewards that could be the
|
|
# desired item
|
|
print "P(C = %d) = %0.4f" % (reward_count, p)
|
|
total_p += p
|
|
# expected value for number of rewards that could be the desired item
|
|
print "E(C) = %0.2f" % expected_attempts
|
|
|
|
# math check, make sure all possibilities add up to 1, allowing for
|
|
# some floating point precision loss.
|
|
assert abs(total_p - 1.0) < .00001, "total = %f" % total_p
|
|
|
|
p_at_least_one = stats.quest_reward_p(reward_percent, min_rewards,
|
|
max_rewards, extend_percent)
|
|
expected = expected_attempts * reward_percent / 100.0
|
|
|
|
print "P(N > 0) = %0.2f%%" % p_at_least_one
|
|
print "E(N) = %0.4f" % expected
|