Monster item drop,RPG game monster item drop

Question

I want each monster to drop an item randomly with a drop rate percentage. It can drop only one item at a time. So I randomize a number between 0-100 and if it's lower than a chance of an item it drops the most rare item possible. (For example: armor 50% helmet 30% weapon 5%. if the random num is 1 I get the weapon, if the num is 20 I get the helmet etc.). The problem is, those chances are not accurate, because I must get a num between 5-30 to get a helmet (which is 25%) and 30-50 to get an armor (which is 20%). Any other idea how to implement it? here is my code in my DropItem() function:

   int rnd = Random.Range(0, 100);
  // Sort the list by drop rate (ascending order)
         
  // Drop the most rare item possible
  foreach (Item item in itemDrops){
  if (rnd < item.dropRate)
 {
 //drop
 return;
 }

Thank you!

Answer 1

Answer by MUG806 · Jul 28, 2022 at 06:52 AM

Add the drop rate to the drop rate of all previous items:

 int rnd = Random.Range(0, 100);
 int totalDropRate =0;
 
  foreach (Item item in itemDrops){
       totalDropRate += item.dropRate;
 
        if (rnd < totalDropRate) 
                   //Drop
 }

You also won't need to worry about sorting them.

0 Show 1 · Share

omercohen213 · Jul 28, 2022 at 11:02 AM 0

Share

Thanks for the answer. As I mentioned I want the monster to drop only one item at a time. I break out of the loop once an item drops, and your soloution drops all items possible. I hope I made my question more clear.

Answer 2

Answer by DaaraSingh · Jul 28, 2022 at 07:36 AM

You can simply break out of the for loop once something has dropped

0 Show 2 · Share

MUG806 · Jul 28, 2022 at 08:14 AM 0

Share

I think that would still result in incorrect probabilities though

omercohen213 · Jul 28, 2022 at 11:04 AM 0

Share

Yes, I do. But the probabilities are incorrect just like in the example I gave.

Monster item drop,RPG game monster item drop

2 Replies

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions