Question Propability of a Cube having a specific Component

Hi,

I want to create a functionality with which I am able to set-up propabilities for a set of Components to be applied to an GameObject.

Lets say I have these Components:

- SpeedUpgrade
- HealthUpgrade
- StealthUpgrade

And these have all a Chance of 33% of being selected for the GameObject. So there should be a random selection between them based on the specified chance (it could also be 20/20/60 %)

How can do I this?

 

I found something: https://forum.unity.com/threads/spawning-one-item-at-a-chance.423108/

 

So theres a 33% chance of 1 of the 3 to be selected, or 33% chance of each to be selected
This thread should help you out
https://forum.unity.com/threads/ran...bject-having-a-chance-of-being-picked.485792/

 

@Johan_Liebert123 Yeah but it should pick one and only one.

So I would go for this one of your option "So theres a 33% chance of 1 of the 3 to be selected"

 

Would it be an option to say there is a range from 0 to 1 and apply an specific part of this range to the components to be applied?

So for my example this would be:

- SpeedUpgrade (0-0,33)
- HealthUpgrade (0,33-0,66)
- StealthUpgrade(0,66-1,0)

Or if we change the chances:

- SpeedUpgrade (20%) (0-0,2)
- HealthUpgrade (20%) (0,2-0,4)
- StealthUpgrade (60%) (0,4-1,0)

Is this something similar to a chance calculation and will this be something equal to the desired chances?

 

I guess you can do something like this

Code (CSharp):

1.         int number = Random.Range(0, 100);
2.         if(number <= 33)
3.         {
4.             manager.SpeedUpgrade;
5.         }
6.         else if(number > 33 && number <= 66)
7.         {
8.             manager.HealthUpgrade;
9.         }
10.         else if(number > 66)
11.         {
12.             manager.StealthUpgrade;
13.         }

Try that out,

manager.SpeedUpgrade

etc is the method you wanna call once its been selected
EDIT: You can create a simplified version of that, but c# and maths are not my thing and you can also change the chances based on your needs

 

A simple way is to roll a random # from 1-100, then use IF statements to decide on which version. Something like:

Code (CSharp):

1. int spawnTypeRoll = (code for random 1 to 100 int)
2.  
3. // odds here are for 20/20/50/10:
4. if(spawnTypeRoll<=20) spawnType=1;
5. else if(spawnTypeRoll<=40) spawnType=2;
6. else if(spawnTypeRoll<=90) spawnType=3;
7. else spawnType=4;

There are slicker ways, but this way is easy to understand as far as what the code does. I just set spawnType, but you could have it Instantiate type 1, 2, 3 or 4 items instead.

 

If you used only IF's, you'd need to list both ends, like "between 34 and 66", but a neat thing about if/else (which is what you have) is you can list only the ending value. 1-33 is taken care of by the 1st IF. If we get to the second, after the else, we know the number is 34 or more, so don't need to check. Checking just <=66 is automatically 34-66. It's a common trick with cascading IF's like that.

That's a little less error-prone (no risk we'll cover 1-33 and 35-66 and miss 34), but mostly it's easier to read and change. Each breakpoint is listed just once -- one 33, one 66.

 

Okay understood, thanks!

 

Oh, never knew that. Thats pretty handy, learning new stuff every day now from you all, thanks a lot!