Casting Explained | Unreal Engine 5 Tutorial
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- Опубліковано 28 тра 2023
- *Notice Description Contains Affiliate Link
Casting in Unreal Engine is often misunderstood. In this video, I do my best to explain and demystify everything regarding casting. We talk about why the object input is needed, what exactly it is, and why casting is needed in general. I also go over some best practices, and mistakes to watch out for when you encounter casting. This is the first in a series of Unreal Engine 5 fundemental concepts. If you find this video useful, please consider slapping a like on it, and thank you for watching!
Thanks so much for watching! If you enjoyed this video please consider giving it a thumbs up, and if you want to be notified of more content from me, consider subscribing! Wish you all the best of luck with your projects!
Want to learn more about Blueprint Communication? Check out these videos:
Blueprint Interface Tutorial - • Blueprint Interfaces |...
Event Dispatcher Tutorial - • Event Dispatchers | Un...
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finally an actual explanation, thank you. my blueprint is still broken, but atleast now its actually reading the values from the casting, progress.
Awesome, thorough, helpful tutorial. Thanks a bunch for this !
Thank you thank you, Everywhere i go people gloss over blueprints, your videos have helped me immensely
Thank you so much for going into so much detail about this, in laymen's terms. Casting has perplexed me for years, as an artist that doesn't use blueprints regularly.
Dude that was the best video I've ever seen of explaining what these things are and how they're used it's hard when you have no background in coding to try to understand the basics of what these things are why they're used and how they're used with examples so thank you you got my sub man
Thank you for the simple and thorough explaining
Dude I was so confused about casting before I saw this video. Adding to this a few minutes of research about UE5 Class hierarchy and it all started to click for me, at least I hope it's clicking lol. I've been learning game dev since the start of the year mostly using c++ with some supplemental blueprint and I just wanted to say that your explanation helps me understand the code too! You've earned a subscriber.
Too bad there are so many other people on youtube teaching this subject badly. I think your channel has been hidden amongst the weeds of channels that either don't know how to teach or don't really care about teaching... but instead they just want to look smart so they talk really fast and give esoteric and superficial explanations unlike yours which are grounded in concrete examples that are relateable and thorough.. Seriously man, this is the single best explanation about blueprints I've ever gotten. Keep it up or maybe try to make a Udemy course on this. I would SO buy that SO hard.
Excellent, thank you! You're a great teacher!
oh my god, this just helped me out so much!! thank you so so so much!!!!!
Very well explained
Dude this video was perfect, I am attempting to create a game with several interactions and was getting frustrated with nesting casts, I got so called out at the end lmfao, looking to learn about blueprint interfaces!
Many thanks , very helpful !
Thank you so much for this. You've got better, more concise explanations than everyone else on here. I hope you explore some of the more esoteric nodes. I want to feel smarter when I watch some dude speedrun an IK tutorial
Thank you soo much. Perfect video.
Great explanation.
Randomly got suggested this when looking up an issue… and was like “wait I worked on “Road Mode” with him lol. Nice video my dude. 👍
this video helped a lot thanks man
thanks, that was a great explaination
Thank you, it helped a lot!
Great video, thank you
Brilliant tutorial thanks a lot man!!!
Honestly, I think cast is not the best name for what It does , this was number one for me why it was so confusing…
This really helped me! Thanks! I thought Cast To meant Sending data. I see now it means it's a throughput. And your details about object helped too, great examples!
What's funny is this video helped me finally understanding casting from a C++ standpoint. Coming from Unity and C#, it was just irritating me how little sense it made and I like to understand things more than just memorize them. Kept getting, "Idk, it's just how you do it." Thank you.
Me too. I had to stop midway into a udemy unreal tutorial and watch this video to understand the prior tutorial. This YTber helped me understand.
@@troyna77 Is it the one where you're making the crypt explorer game by chance?
Same
This helped a lot =)
I always find out what wildcard to use if it does not say any error or note. :D But i began to reroute casting with interface wherever i can or know how. But this video helps. Thanks.
Thanks!
Since you have covered BP communication, perhaps next you could cover data types, data tables, data assets, structs, and everything related to storing game information and when is best to use each of them?
Actually working on those topics currently!
@@TylerSerino Hell yeah! Subbed, and looking forward!
thanks man
I've recently taken up Unreal, and found most tutorials lacking explanations of stuff like this. I ended up just reading the documentation instead. So many tutorials will tell you how to do something but not how it does something.
With casting in particular I've justified it mentally as the blueprint picks up the casted object and looks at it, it is now able to interact with it and know about it.
With a video like this I could have saved several hours on the weekend.
Can you help me out real quick? I watched it but still couldn't know what to put in the "object" pin in my project...
I have my player, a character that chase me, and a safezone that despawns the character. I need in the safezone's BP a cast to the character BP, but everything i plug in the object pin gives an error/doesn't work
@@samuelmertens4116 Sorry for replying so late. If youre having a cast go back and forth between 2 objects, it can cause problems and not work, for something like that you may want to use a blueprint interface, which Tyler has another really good video on. If that isnt the case, then I think youd need to show pictures to get a better idea of what could be causing issues.
I would love a video on soft references. I am still scratching my head over them and most videos are very confusing about the use cases.
ty
If you were to make an interaction system as the one you described in the video, how would you do it without collision detection?
How did you know what my exact problem was
Hi Tyler. I am trying to make two BPs use each other's variable.
I have a player character BP and an actor BP as an ability projectile.
I would like to have multiple different ability actor BP.
I am trying to increase the ability's damage increase by the players bonus damage.
I have tired the method at 6:50 of the video as well as getting all actors of the class and then connecting it to the cast to node.
I am not sure what I am doing wrong:(
I do have an imgur link that i could send to you
Any help would be greatly appreciated
Thank you in advance!:)
Since it’s a projectile I’m assuming your spawning them in during game? If so each time you spawn one in, that’s a new object and when you destroy them the object reference will no longer be valid. If I’m correct and you’re spawning them in during runtime, what you could do is set the variable for bonus damage on the projectile as “expose on spawn”. Click the variable in the blueprint and look on the right hand side in the details panel. Now, when you use the node “spawn actor from class” that bonus damage will be an input. If I’m wrong and your not spawning it in, or if you’re still having trouble, send me the imgr link and I’ll try to help
@@TylerSerino Yes thank you so much!!!!! This is exactly what I needed I can't thank you enough:) I really appreciate your videos!
this explain new somthing abaut casting thanx but if ihave 3 diffrent class exmp bp 1 bo 2 and bp3 and haw to cast 3 actore in same cod letme explain more
i have actor name AI from event tick i need to cast this 3 actor in the same time
have a like.
Nice video, me and a friend are new to UE5 and we can't seem to figure out the cast to class and to have that class go into multiple different object. How would that work? One class for multiple objects, like basically a cubeguy and coneguy, but it just is looking to see if its a shapeguy (any interactable object you'd want). That way you could pick up or see name of either shape/object. There's definitely a way I don't know that doesn't involve duplicating the same code over and over for each new object 😂Help would be greatly appreciated
You’d use inheritance, and cast to the parent class. So you’d have a shape guy that your cube and cone guy inherit from. Anything they have in common will go in the parent
@@TylerSerino Solid, will check out your inheritance video to try and get a better understanding
@@SplarcieRS Youll also want to check out interfaces. Doesn't have to be my video, but interfaces are potentially another way to achieve this, however, if it's just something like a cube guy and a cone guy, i'd use inheritance. If it were, say, a cube guy, a cone guy, and a door (door is completely different), then you'd want to use a combination of the two. Either way, both super useful/important concepts to understand. Best of luck!
Use the sparingly.
Nice tutorial. I have watced your other videos about blueprint interfaces and event dispatchers and I like them, very helpful. But I have a problem which I am still unable to solve. I hope I can explain it in a few lines of comment. Simply put, I want to send data in other words cast to character blueprint from a game mode blueprint. I have tried CAST TO and INTERFACES and EVENT DISPATCHERS but none of them worked. All three of these have the same input pin, OBJECT or TARGET which I don't know what to plug-in in the game mode blueprint. Here is the setup: The game mode blueprint randomly spawns NPCs (enemeys) in waves in the level which the player has to fight and kill. Now what I want is that the dead bodies of the NPCs stay on the floor until the wave is finished and then get rid of the bodies cleaning the floor for the next wave. There is a node in the game mode blueprint that is called whenever a wave is finished and initiates the next wave, at this moment I want this node to send a message to the enemey character blueprint to remove the bodies from the level. If this doesn't clearly explain the problem I would gladly record a videos of it and let you watch it. Thanks
Off the top of my head, what I would do is create an event dispatcher in the game mode that gets called when the wave is finished, in your enemy bp, you can use the “get game mode” node and bind to that event dispatcher to destroy them
Edit: you can use get game mode, and use that to cast to your specific game mode, then you bind
I have tried that already. In the enemy bp, the "get game mode" output pin doesn't connect to the input pin of the event dispatcher. Here is what it says: game mode base object reference is not compatible with bp game mode object reference.
@@Ahmadnaweed786You cant connect directly from the "get game mode" node, you have to cast to the game mode your using, which is going to be a child of the game mode returned by the "get game mode" node. So GetGameMode->CastToYourGameMode->bindtoeventdispatcher. If you need more help you can message me on discord tyler8106
@@TylerSerino ok thanks. I will do this and let you know the results.
@@TylerSerino it worked! thanks. And I have also sent you a friend request on Discord.
*My thought - What the heck is this object pin for.
*Video starts - "if you clicked on this video you are probably trying to find out what this object pin is for".
mystery solved
A blueprint is a class that can be an object instance. An actor is considered its parent class, BUT the child class is also called actor. So when the "other actor" pin gets connected to the object pin the logic flow is Get Owner: target is actor component is essentially finding the child class of the parent class actor and outputting to Object pin which represents the instance of it. Then cast to references the blueprint to access which in turn "gets" target first name. Now for other actor to Object pin overlap executes on any actor and Cast to operates within the parameters of itself because the "Object" is the instance of the cast to blueprint class. I'm not too sure about overlap being executed but not going through or just simply not executing at all. The reason why I am not sure is because the Object pin is an input I THINK, not an output. I just started unreal like a month ago don't really grasp the concept that well