Efficient flagging system

hi!

currently, I'm building my first game with a "kind of" flag system.
for example, if a player reaching a certain point, something will happen.

right now, I'm using if-else. but I wonder if there's a better and more efficient way to do this?

also, one more question, is nested if-else can affect performance so much?

 

You should use events. https://learn.unity.com/tutorial/events-uh

Basically, the idea is that when the player reaches that point, you can fire an event like

Code (CSharp):

1. Player.PointReached();

Then on any object which needs to respond to the player, like a door opening, you can write something like

Code (CSharp):

1. Player.PointReached += Open();

in your Door script.

Also, nested if-else's don't really affect performance, but it is usually bad practice. If you have a bunch of if-else statements going on, you should replace it with polymorphism (move the behaviour to the class you're dealing with so you can do something like Item.Use() instead of if(item is Food)...else if(item is Weapon)... else if(item is Whatever)...).

 

I've looked around at events, not really understand yet, but it looks pretty neat!
thank you for your reply.