Tag: Events

Unity Using Events and Building Effective UI Systems

digm520admin / / Events, EventSystem, Programming, Tutorial, TutorialList, Unity
September 7, 2021

Unity Events

UI Systems

Title:
C# Events in Unity! – Intermediate Scripting Tutorial

By:
Unity


Youtube Link – Tutorial #1

Description:
Brief introduction to using Events in Unity.

Title:
How To Build An Event System in Unity

By:
Game Dev Guide


Youtube Link – Tutorial #2

Description:
Quick showing of implementing a basic Event system in Unity for gameplay reasons.

Title:
Delegates, Events, Actions and Funcs – The Observer Pattern (Unity & C#)

By:
One Wheel Studio


Youtube Link – Tutorial #3

Description:
Covers Events, as well as Delegates, Actions, and Funcs specifically through the Observer Pattern in Unity.

Title:
Game Architecture Tips – Event Driven UI – Unity

By:
Dapper Dino


Youtube Link – Tutorial #4

Description:
An Event system built in Unity specifically with a focus on UI.

Title:
Building Unity UI that scales for a real game – Prefabs/Scenes?

By:
Jason Weimann


Youtube Link – Tutorial #5

Description:
General coverage of building effective UI systems in Unity.

Overview

I wanted to delve further into using Event systems in Unity specifically when building UI systems, so I collected a few resources I thought would help with researching that. These tutorials cover everything from the basic foundations of Events themselves to fully fledged UI system tutorials near the end implementing those tools and concepts covered in the earlier tutorials.

I think Event heavy systems are very effective ways to build out UI in games, so I want to get a better grasp of setting that up. I especially think the final tutorial by Jason Weimann will help bring those topics together as well as cover other important factors for building larger scale UI systems.

via Blogger http://stevelilleyschool.blogspot.com/2021/09/unity-using-events-and-building.html

Observer Pattern in Unity with C# – by Jason Weimann

digm520admin / / C#, DesignPattern, Events, Programming, Tutorial, Unity
April 22, 2021

Observer Pattern

Game Dev Patterns

Title:
Observer Pattern – Game Programming Patterns in Unity & C#

By:
Jason Weimann


Youtube – Tutorial

Description:
Introduction to the observer pattern and implementing it in Unity through C#.

Overview

This tutorial covers the basics of the observer pattern in game development with two ways of implementing it in Unity. The first approach is relatively simple just to establish the concept, whereas the second approach uses events with C# to create a more flexible system.

Observer Pattern Basics

An object, called the subject, maintains a list of its dependents, called observers, and notifies them automatically of any state changes (usually by calling one of their methods)

Example Uses in Games:

UI elements updating when data behind them changes

Achievement systems

Implementation #1: Inheriting Observer and Subject Classes

Observer Class:

Abstract class your observers will inherit from

OnNotify() method that accepts a value and notification type


Subject Class:

Abstract class your subjects will inherit from

Hold information on their list of observers they report to

RegisterObserver() method to add Observers to list of those reporting to

Notify() passes a value and notification type on to all the observers they report to in their list, in turn calling their OnNotify methods with the passed on data

This example gets the point across, but is not particularly well suited for Unity or C# projects. Requires a base class on all observers and subjects (although could possibly be changed to using an interface system).

Implementation #2: Using Events

Subject objects create a ‘static event Action‘, which they then call when the requirements are met.

Observer objects have their own methods to perform when those same requirements are met, and they are connected by having the observers subscribe their relevant methods to that same ‘static event’.

This reduces the direct coupling between the observers and subjects, as well as any other objects involved. Should profile this as calling events every frame can start to lead to performance loss. As always, also need to be careful to properly unsubscribe methods from events when needed (such as when deactivating or destroying objects).

via Blogger http://stevelilleyschool.blogspot.com/2021/04/observer-pattern-in-unity-with-c-by.html