How to Program in Unity: Command Pattern Explained

День тому

Learn the fundamentals of the Command Pattern in this new video break down! We'll explain how to use each component of the pattern using c# programming in unity!
This tutorial explains important concepts behind the Command pattern and how to use programming! Today we will walk through an example project to showcase the benefits of using state, the state pattern and state machines in Unity!
This is a new episode in a growing series on this channel: Programming for Production. In this series, we take relatively complex software development topics and try to explain them in easy-to-understand ways. Let's take our programming skills to the next level!
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►TIMESTAMPS:
Intro: 0:00
Classes Deep Dive: 0:45
The Focus of Today: 1:30
Program LifeCyle: 1:45
The Question of the Day: 2:10
The Command Pattern Definition: 2:50
Classes Explained: 3:08
The Concept of the Command Pattern: 3:40
The Structure of the Command Pattern: 4:10
Meta Example: 5:34
CODE STARTS HERE: 6:30
Project Without Command Pattern Overview: 6:40
Refactoring with the Command Pattern: 7:18
Abstract Command Explained: 7:46
Concrete Command Explained: 10:00
Using just the Concrete and Abstract: 11:40
Invoker Explained: 12:12
Important point about the Command Pattern: 13:28
Lightswitch Invoker: 13:58
Decoupling: 15:00
TurnOff Refactor: 15:18
What this Invoker is missing: 16:27
Phillips Hue Example Setup: 16:47
A Better Invoker - LightApp Invoker: 17:22
Undo Functionality: 19:18
Whats might come next: 21:50

КОМЕНТАРІ: 148

@Tarodev 2 роки тому

I loved that 'like' example. I was fiddling with some lego, which I had to snap together and put down before moving to the mouse to like the video. Perfectly executed!

@iHeartGameDev 2 роки тому

Rad! Love to hear that the Meta example was able to click 😊 cheers Taro! 🍻

@HassaanALal Рік тому

oo, one master of another master's video. This looks like the kingdom of masters :D

@obiekt19 7 місяців тому

Wonder if Taro noticed that he was one of the house instance owners in 3:34

@iHeartGameDev 2 роки тому

Over a month of research, recording and editing later... I can’t wait to finally share this tutorial! See you all Sunday! Cheers! 🍻

@christopherrapczynski204 2 роки тому

I really hope the patreon supporters vote for the combat system, I've been waiting so long for that haha

@chethanvenkataramaiah6940 Рік тому

Really appreciate the amount of effort u have put in the video. I know how much of work it takes to pull of these things. Really appreciate that!!!

@daffertube Рік тому

This is actually the most useful style of editing a video about programming. WAYYYYY easier to understand than listening to a professor talk for an hour with a piece of chalk.

@iHeartGameDev Рік тому

Thanks very much Dustin!! Glad you liked it!

@anthonytrepanier1877 2 роки тому

Hey! I just wanted to say that your tutorials are the most clear and detailed one that we can find on UKposts. It may not seem like it but I know that editing this kind of video takes a lot of time. Also, these topics (Design Pattern) are so important in game development. It allows us to complete a game without any frustration. Big congrats and thank you!

@iHeartGameDev 2 роки тому

Thank you so much for the kindness, Anthony!

@mateuszpatua3016 9 місяців тому

the one tutorial I've been looking for! it just clicked! THANK YOU!

@marularch 5 місяців тому

I watched a lot of tutorials to be able to understand everything about the command pattern and adapt it to my needs; your tutorial has the clearest explanation. (I still suggest watching other tutorials too if anyone is having problems)

@M3g4t0n 2 роки тому

Despite the difficulty of me trying to grasp this concept, your explanation is rock solid! I feel that if I watch this once or twice more, I'll actually be able to implement this in my games!

@pewpew518 2 роки тому

Give this man a rider license.

@Damnesia2 Рік тому

I clicked this video out of interest since I've learnt design patterns and have been programming for a while but have only recently heard of this pattern. I ended up realising that despite not knowing this pattern, I've already used it in a personal project for the purposes of compilation of a scripting language I created for a text based action game engine I made back in University. At least now I have a name for this pattern. This just shows how useful this pattern is that despite not knowing of its existence, I ended up using it because it achieved the goal in a clean and efficient way.

@zeeshansattar4531 2 роки тому

Please also cover SOLID principles exactly like the way you did state pattern. And obviously this video was helpful like always :)

@lucasafonsolombardimoreira6539 2 роки тому

Great video!! just a small correction. At 13:44 STACK is LIFO (Last in - First Out). Love your videos!!!

@zaprodaju1661 Рік тому

This is the next level of tutorials. Not only explained in the "command pattern for dummies" kinda way, but it's also animated, well-structured, and super concise.

@user-ij6el8gw5y Місяць тому

I really liked the analogy with the like this video command, smart!

@iHeartGameDev Місяць тому

Thank you :)

@bitgalaxis1147 Рік тому

Excellent. I can't say I've ever seen a more complex group of programming topics condensed so clearly in 22 minutes. Excellent concept breakdown, excellent presentation, excellent explanations. For those of you who are somewhat new to programming and struggle to understand concepts like interfaces, abstract classes, or their purposes, watch this video. It will make it clearer. If you already understand these things pretty well, you'll wonder why nobody ever explained it this way to begin with.

@GameDevNerd 2 роки тому

A better design is to create a CommandProcessor class with a Queue collection that stores commands and processes them. Stack stores the history. But for anything other than trivial commands that finish instantly, you have a lot of challenges to overcome to have accurate undo-ing of commands. The CommandProcessor can be added to any class you want to execute commands, and will be nice and generic so it doesn't care what type of concrete commands it's running. It only cares if it's a simple ICommand or an IUpdatedCommand that needs updates and takes a while to finish. Without this, you can't implement more interesting things like moving a character along 5 waypoints because all of the commands execute instantly and the character will just go straight to the last waypoint instead of following them in sequence and moving on when the active one is complete. It was kind of a challenge for me to implement this sort of system properly, but once I ironed out all of the problems in it I ended up with a reusable system I can apply to literally anything and just create new commands for it to run literally any logic. Some things may to inherit CommandProcessor and override the way it processes commands, so mark its methods virtual. An example is if you're making an RTS game and you want a unit to attack an enemy but if it's given a an order to move or retreat it will cancel the attack command and do as the player commands. Otherwise, it will be stuck attacking until it dies or kills the enemy before it can respond to the next commands enqueued, and it can't do that if it's dead, can it? So the command processor for the units will override the ProcessCommands() method of the CommandProcessor base class and deal with this accordingly, by canceling commands that are followed by a higher priority one like an immediate move, stop, retreat, etc ...

@DylanBurke 2 роки тому

Hey, solid intro on command pattern; thank you for that. One tiny nitpick (mostly for those watching to think about) at 17:05, SetRandomLightColor() should really just pick a random color, then call SetLightColor() feeding in the random color instead of repeating the same logic.

@radiantgames55 4 місяці тому

I love how you take things from ground up and then build upon that. One of the best videos of command pattern I have ever watched!! ❤❤ Please make more videos of this type.

@iHeartGameDev 4 місяці тому

Hey thank you for the kind words! I try to make things understandable to myself so I guess it just happens that a lot of people think similar to me 😅 happy to hear you do too!

@HarshYadav0069 2 роки тому

One thing i have to say is, i have seen lots of tutorials of unity and programming about many topics, and there are lots, but all of them are not that much relevant some are and one of them is yours one thing that i love about you and your channel is, your only talks about relevant things means point to point no other useless stuff and this makes your video more interesting. that's why i love your channel. keep uploading this cool stuffs. love you from india...

@iHeartGameDev 2 роки тому

Thank you so much for such a kind comment! 😊 I am happy that these videos offer more and new ways to explain these concepts.

@HarshYadav0069 2 роки тому

@@iHeartGameDev thanku to you bro!! Keep working 🤗

@IPlumpton 2 роки тому

Genuinely one of the best game dev channels going. In a world of racing to the shortest video, it's great to see in depth tutorials like this. Thanks and keep it up! 🙂

@orpheuscreativeco9236 Рік тому

I was wondering _how_ to work the "Banana Command Class" into my code, thank you so much! ✌️

@signalised9540 2 роки тому

This is honestly one of the best tutorials made on this topic Thanks Nicky!

@zekiozdemir420 Рік тому

Wow! might be the best tutorial I have seen about this. Thanks

@alexmilanu8652 2 роки тому

I love your tutorials and explanations :) Especially for this advanced stuff. You're helping me a lot. Thank you for those videos!

@iHeartGameDev 2 роки тому

Your kindness means the world. Thank you 🙏

@saqibbro5297 Рік тому

Thank you so much for this brother. This means alot!!

@TheKr0ckeR Рік тому

This video-editing is very high level.

@Ironlionm4n Рік тому

Awesome video, cant wait for the Observer Pattern video later today

@jonathandunn9302 2 роки тому

This is one of the clearest and most concise videos on a subject like this I have ever seen! Kudos!

@mosleydev9973 2 роки тому

Thats what i've been searching for

@workflowinmind 2 роки тому

Really love your charisma man, nice to see more advanced topics! Keep up the good work ❤️

@ochukomeoghenetega3737 2 роки тому

Love this. Nice one man. Always wanted to try this out. Good to have the basic knowledge

@babarrehman7967 Рік тому

Bro you should make a series of coding it is really difficult and your way of explaining is owesome

@iHeartGameDev Рік тому

My next video will be on another pattern!

@thelordcthulhu3684 Рік тому

Another amazing video. I cant wait to see more use cases of this pattern in the future!

@Landon_Hughes 8 місяців тому

Not sure how I found this video, but thanks! I’m not a C# dev but I can see where this would be useful in Swift 😁

@nikowolfwood Рік тому

This video is pure gold. Thanks!!

@bobaman8957 2 роки тому

❤️❤️❤️ More design patterns ❤️❤️

@BbVortexMortinghan 2 роки тому

Good to see you back at it Nicky, I love the videos.

@JazzInATinCan Рік тому

This was very informative, well structured, good examples, easy to follow with the refactoring etc. Very high quality, thanks :)

@dibaterman 2 роки тому

So I've decided that my first game dev related income I'll put $50 towards patreon, if anything your videos keep me going. Today I am going to be working with a asset I got off Unity Store to do some level design. I have an idea for the way the game will look, it's general loop, and the scenes needed to facilitate this for the purpose of making a demo. Up until now I had been doing prototypes where I test out ideas and mess with things to get familiar with coding and developing in Unity. Each one of these prototypes I figured I'd be using in some way on my final project. I realized it's a lot easier to be inspired to develop my final project if I can see a level instead of working with primitives. So I'll be working on 2 combat maps and one Town map. I still haven't really landed on what the world map will look like. After that I will have a separate project for developing the UI visuals. Right now I think I'm at a point where I've taken in all of this stuff and I can use it but without your videos I'd forget I know this stuff. This means to me I'm in need to some way to note down patterns and possibly I should refer to my old projects more. Anyway thank you for being you.

@julienaudisso3409 11 місяців тому

It's very very well explained. Thank you and good job !

@sorokan6036 Рік тому

The quality of your videos is amazing! Keep up the good work :)

@tarekchentouf4860 Рік тому

You are AMAZING! This is a premium quality tutorial. Thank you so much!!!

@basavarajguled848 2 роки тому

compared to infallible code the way you explain the concept is really effective, not so fast not too slow. keep doing videos and please cover some more paaters and SOLID patter as well

@Hiren24 2 роки тому

Thanks for such a great explanation 😍😍Loved it

@coltraingames1740 2 роки тому

great video, i'd love to see a follow-up showcasing a variety of different applications for this

@jean-michel.houbre 2 роки тому

Very well explained! Thank you !

@nguyenhuuphu8371 2 роки тому

I wish people would know your channel more and more

@kepcukhusamettin9400 Рік тому

Very high quality tutorial, thanks!

@SkaiCloud562 Рік тому

Took me a whole year. My brain finally invoke the subscribe button.

@kizz06 2 роки тому

i watched tons of tutorial videos and you are one of the best. Really appreciate your effort of making animations and stuff to make it really easy to understand.

@iHeartGameDev 2 роки тому

Thank you so much Kizz06! I’m glad you like the videos and appreciate the effort!

@PhantomWolf93 2 роки тому

Really good tutorial, very interesting, easy and visual. Good work man, i want more videos, i learn a lot with your channel!

@Natural_Mindset Рік тому

Меня ещё никогда так изящно не сподвигали лайкнуть видео))

@thev01d12 2 роки тому

Awesome video. Glad someone is covering topics that are necessary to be used in production. Have you thought about making a video on inventory system?

@GameplaysJogosPC 2 роки тому

Excellent video. It is very difficult to find paid content with such quality as this video!

@chris.davidoff 2 роки тому

I recently used the command pattern at work, it would have been great to see your video first :P Implementations can be done so differently which is always great to see

@Javiwido 2 роки тому

You got your like, bc that was a great meta example. Besides, my hand was also busy with coffee.

@grumpysalmon4153 Рік тому

Super helpful! Love your videos

@Introboy13 2 роки тому

Broooo! This is sooo detailed AF! Thank you! 🎮

@iHeartGameDev 2 роки тому

Cheers mate! Thank you for the love!

@ajmckennan1663 2 роки тому

Some of the best content on youtube!

@tekmontekmon8098 Рік тому

Amazing video ,thanks for sharing

@sangareshwarannadar_official 2 роки тому

The video Is good worth waiting

@vrfxrealtime Рік тому

This was great! Please More :)

@losfouad2014 2 роки тому

Thank you for this awesome tutorial 💙

@iHeartGameDev 2 роки тому

Thank you for watching!

@KennethBoneth 2 роки тому

Really well done.

@renatusdev 2 роки тому

This is the most unique way someone got me to press the like button. I literally had to press it just to understand the concept of an invoker hahahaha

@iHeartGameDev 2 роки тому

Lol happy you understand it now though!

@Dk-Ang 2 роки тому

Nice tutorial!!

@kenji0q 2 роки тому

좋은 영상 감사해요 객체지향으로 코드를 구성하는데 도움이 될거같아요 개발자는 언제나 공부를 해야하네요!

@raingame_ Рік тому

So good tutorial! applause!

@ahmadelmir7660 2 роки тому

Thank you for all your tutorials about Unity. They are so helpful. Could you make some Tutorials about the Unity particle system? How to use this tool and how to use it with animation. :)

@Churagawa Рік тому

Awesome tutorials dude. Really. Would love to see some command queue handling :3, also callbacks from command

@AlexBlackfrost 2 роки тому

5:50 my invoker (Brain.cs) had already liked the video on the Awake() function 😎. Great video, man!

@brianwilson7497 Рік тому

dude, fantastic, thank you

@iHeartGameDev Рік тому

Thanks for watching Brian!

@SigmaZer0 Рік тому

Excellent!

@ponchitosalcedo2588 Рік тому

nice ! runs great on my laptop on medium settings :)

@muhammetuymaz2961 Рік тому

13:44 Stack should be last in first out

@Overdrink7 6 місяців тому

Even if I know this pattern, I wouldn't have explained it better :D

@iHeartGameDev 6 місяців тому

Thank you!

@vima9046 Рік тому

Good tutorial!

@DanielS-yf4me Рік тому

Its been a great help, I just wish the example wasnt so contrived. Additionally the one of the things you mentioned was that commands allow for delayed actions, but that was completely ignored in the example because the input immediately caused action.

@goehlergamedev Рік тому

Really great videos! 😁 👍

@V1113sh Рік тому

Thank you

@Nomedeusuariodoluiz 2 роки тому

Awesome!

@royvictorgagarin55 Рік тому

Awesome!

@Wobling 2 роки тому

Great video

@Ligerff346 2 роки тому

perfect also when u will be making practical use of it my req is that also show use of conservation with it

@oaksBFL Рік тому

thx and subscribed

@zeggxr1539 Рік тому

Would like to see some systems like : inventory system, grid system, merge system, stat system

@tugan_aa 9 місяців тому

Hello IHeartGameDev, as a programmer I want to say that you have explained the basics of OOP very well and thank you for that but I wouldn't call it delaying the execution. And since you have started with the OOP concept you could take a look at abstraction, encapsulation, inheritance and polymorphism. I am not sure if you guys are using these concepts on Game Programming but I would love to help you out if you ever need.

@Brovider 2 роки тому

I love you man you're the best

@iHeartGameDev 2 роки тому

Thanks so much for the kindness!

@neelanshpandey455 2 роки тому

Hey, Can you create tutorials on how to setup character animation with multidirectional animation for twin stick shooter...thanks for your help, your great...and sorry for my bad English

@iHeartGameDev 2 роки тому

Hey! That sounds fun to do one day!!

@romanblack1420 2 роки тому

good tutorial

@WeirdGoat 11 місяців тому

Great video! Just 1 question, what's the difference between Command and Observer pattern?

@ugurkarabulut8598 Рік тому

Perfect tutorial can u make exactly same for factory and abscract factory pattern :D

@soonhongng7037 11 місяців тому

Damn, the way you suggested subscription is damn sick 😂

@iHeartGameDev 11 місяців тому

Thank you! I thought it made sense at the time!

@noodlekopf2443 Рік тому

Would this be useful to damage an enemy in a multiplayer game by different players or is it fine to just subtract it directly? Can someone give a example for a not turn based game?

@MsDeniz2001 2 роки тому

Hey can you demonstrate multiplayer game development ?

@muhammadjamal347 14 днів тому

Why did you execute newCommand in lightApp invoker in addCommand method? arent they supposed to be different? newCommand.execute() in execute() part of invoker and pushing command to stack in addCommand() ?

@SakanaKuKuRu 9 місяців тому

I keep thinking about the lazy lambda functions when delay is mentioned

@MaZyYTube Рік тому

I am not sure I like it or not this command pattern :D. This would make me difficult to understand where commands are used and how. I need to reverse engineering often I think.