Discuss how to use the Ren'Py engine to create visual novels and story-based games. New releases are announced in this section.
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This is the right place for Ren'Py help. Please ask one question per thread, use a descriptive subject like 'NotFound error in option.rpy' , and include all the relevant information - especially any relevant code and traceback messages. Use the code tag to format scripts.
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richycapy
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#1
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by richycapy » Mon Sep 02, 2019 10:57 pm
Hi
Hope you are all doing great, I have a simple question... how can someone set possibilities/chances in the game, an example:
If the player does something in particular, set a 50% chance for a scene to apear, if the user doesn't do something in particular, set a 25% chance for a scene to apear
I hope is something simple to do
Thanks!!

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Imperf3kt
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#2
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by Imperf3kt » Mon Sep 02, 2019 11:40 pm
I use an RNG with a list of outcomes for this. Probably not the most elegant solution, but it works.
I can give you an example within a day or so.
Warning: May contain trace amounts of gratuitous plot.
pro·gram·mer (noun) An organism capable of converting caffeine into code.
Current project:
GGD Mentor
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Kia
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#3
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by Kia » Tue Sep 03, 2019 1:06 am
the simple way is creating a temporary random value and compare.
Code: Select all
def chance_example():
c = renpy.random.randint(0, 100)
if chance_1 < c:
# trigger the event
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hell_oh_world
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#4
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by hell_oh_world » Tue Sep 03, 2019 3:15 am
richycapy wrote: ↑Mon Sep 02, 2019 10:57 pm
Hi
Hope you are all doing great, I have a simple question... how can someone set possibilities/chances in the game, an example:
If the player does something in particular, set a 50% chance for a scene to apear, if the user doesn't do something in particular, set a 25% chance for a scene to apear
I hope is something simple to do
Thanks!!
In addition to what Kia said, you could also do it like this, I guess...
Code: Select all
default userdidSomething = False
default probability = renpy.random.random()
if probability >= 0.50 and userdidSomething:
do something...
elif probability <= 0.25 and not userdidSomething:
do something...
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isobellesophia
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#5
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by isobellesophia » Tue Sep 03, 2019 9:57 am
richycapy wrote: ↑Mon Sep 02, 2019 10:57 pm
Hi
Hope you are all doing great, I have a simple question... how can someone set possibilities/chances in the game, an example:
If the player does something in particular, set a 50% chance for a scene to apear, if the user doesn't do something in particular, set a 25% chance for a scene to apear
I hope is something simple to do
Thanks!!
You could also try this one, just found it on google.
viewtopic.php?t=25769#p315831
I am a friendly user, please respect and have a good day.

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Imperf3kt
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#6
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by Imperf3kt » Tue Sep 03, 2019 3:59 pm
Imperf3kt wrote: ↑Mon Sep 02, 2019 11:40 pm
I use an RNG with a list of outcomes for this. Probably not the most elegant solution, but it works.
I can give you an example within a day or so.
The way I'm doing it isn't much different from how Kia suggested, but I'll post it anyway since I have it here.
Code: Select all
default result = 0
label start:
$ result = renpy.random.randint(1, 16)
if result in [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16]:
# 100% chance
elif result == 0 or is > 16:
"ERROR"
to get a specific chance value, omit some of the numbers in the list, for example, removing half of them gives a 50% chance of renpy.random creating an integer in the list.
Warning: May contain trace amounts of gratuitous plot.
pro·gram·mer (noun) An organism capable of converting caffeine into code.
Current project:
GGD Mentor
Free Android GUI - Updated occasionally
Twitter
Imperf3kt Blackjack - a WIP blackjack game for Android made using Ren'Py
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