Raycasts in Unity (made easy)

Рет қаралды 87,435

Күн бұрын

Want to know how to CODE in Unity? Go here: gamedevbeginner.com/how-to-co...
Learn how to use the Raycast function in Unity.
00:00 Intro
00:57 Creating a Ray
02:33 The Raycast Hit variable
03:11 The Raycast function
04:48 Layermasks
07:10 How to exclude Trigger Colliders
08:26 Raycast All
10:03 Raycast Non-Alloc
10:30 Other types of Raycast
13:32 Raycast in 2D
16:00 Outro
You'll learn how to create Rays, how to use Raycast Hit data from collisions when they happen and how all the different types of Raycast function work.
Read my full article here: gamedevbeginner.com/raycasts-...
Outro music: New Year by Bad Snacks
Unity icons created by Freepik - www.flaticon.com/free-icons/u...
Cursor icons created by Pixel perfect - www.flaticon.com/free-icons/c...
Chalkboard image - School rules photo created by kjpargeter: www.freepik.com/photos/school...

Пікірлер: 88

@MyPing0 2 жыл бұрын

I've never used RayCasts before, so this video was great to learn something new. I do have a question though about what you say at 9:45. What do you mean by creating garbage? Why does it do that if it creates a new array? I'm assuming you are talking about it taking up memory, but I'm still not that deep into programming so I didn't quite understand that. If you could explain it that would be awesome! Great video as always :)

@GameDevBeginner 2 жыл бұрын

Thanks! So I'm not an expert on garbage collection but my understanding of it is that some actions can create an amount of garbage, which is excess memory that won't be used again so, to prevent memory leaks, it's reclaimed by the garbage collector, an automatic program that runs in the background. And, when this happens, it can cause performance drops, stuttering the game. Functions that create gargage include making new objects, usually anything involving a string seems to do it (e.g debug.log) and creating new arrays, which is why, if you're using raycast a lot, every frame, you would probably want to use the non-allocating version instead of raycast all. Hope that helps! Let me know if you want to see a video on garbage collection in the future and I'll do a deep-dive on it.

@MyPing0 2 жыл бұрын

@@GameDevBeginner Oh I see. Your explanation is great, I actually didn't know about this at all! I would love a video that can explain this sort of stuff. It seems important to know about and yet this is the first of me hearing this lol Thanks again for the reply :)

@GameDevBeginner Жыл бұрын

My article on Garbage Collection in Unity is now live: gamedevbeginner.com/garbage-collection-in-unity-what-it-is-and-how-to-avoid-it/ I'll likely follow up with a video in the future.

@MyPing0 Жыл бұрын

@@GameDevBeginner Wow dude thanks so much for the follow up! I'm gonna read this right now, you are so awesome!

@rishi76 6 күн бұрын

Can't believe it took KZfaq such a long time to recommend this channel to me!!!

@TheMellowed 3 күн бұрын

thank you, thank you, and once more; thank you. this video refreshing my memory on raycasts has actually just saved my entire Unity assignment (i'm good with creative stuff, not coding aha)

@martir1786 15 күн бұрын

PLEASE do a video like this on Angles and rotations. WE NEED IT SO BAD

@jatgreen2995 Жыл бұрын

if only all tutorials were this good, concise and comprehensive with timestamps for whatever you're looking for. you've absolutely mastered tutorial creation

@GameDevBeginner Жыл бұрын

Thanks so much!

@monkeyrobotsinc.9875 Жыл бұрын

this is spectacular. you're the best instructor in existence. Unity should pay you a million dollars to teach their software. finally a great coder who gets that other people dont know everything. thats the best instructor. you.

@notevenjuice1565 Жыл бұрын

Super underrated channel. Instruction was perfect thank you so much.

@MellioMusic Жыл бұрын

Your channel is starting to become my go-to for Unity/C# help. All your vids are so clear, high quality, no-BS. Thanks for all your great work!

@GameDevBeginner Жыл бұрын

Thanks so much!

@techno_tuna Жыл бұрын

I had read how layer masks work, but your explanation was both cleaner, quicker, and more complete than anything I'd read till now. Thank you.

@zappist751 7 ай бұрын

The fact that this video is free to watch is unreal...

@mattmelbourne3688 5 ай бұрын

People in this community generally want eachother to succeed

@JacqueCricket 4 ай бұрын

Not Unreal, Unity

@Rovsau Жыл бұрын

Out of all the videos I've seen on Raycast, this one really goes far and wide. Collider and Plane Raycast were new to me. Really good pacing, explanation and visualizations. Thanks for this great educational content!

@GameDevBeginner Жыл бұрын

Thank you!

@user-mn8pq9ky1u 9 ай бұрын

Thanks for explaining raycasts in unity from the start to the end, not excluding anything! I'm pretty sure you can't make *anything* without raycasts, so that was very helpful!

@MuhammadHosny0 Жыл бұрын

Good job mentioning Non-Alloc it can be a life saver.

@neurotrollium253 8 ай бұрын

Awesome, dude! I never have seen well explained how the binary list works until now, and for that alone you have my gratitude. Also, there is not a better explanation about the RayCast in Unity anywhere else. Your video is top notch and you have gained a new suscriber.

@kiel5390 Жыл бұрын

IM SORRY WHAT! 660 views WHAT! This is better then 95% of the internet. Legit a slideshow and explanation. Insta like and sub GOOD JOB

@alpercizmeci4039 Жыл бұрын

This is some god-tier tutorial. Thanks man keep it up!

@zaidmermam2524 2 жыл бұрын

thats awesome man! your explaination is awesome, the quality is awesome, the sound is crisp, the visuals are cool, great job!

@GameDevBeginner 2 жыл бұрын

Thanks so much!

@simonvutov7575 11 ай бұрын

Really good video man!! Been using unity for 6 years, but always need a reminder on these things every once in a while lol.

@333protoman Жыл бұрын

Outstanding explanation on raycasts

@amcmahon134 4 ай бұрын

This has helped me so much, thank you!

@user-lt4go4qb4b 4 ай бұрын

A really great tutorial man, really helped me understand more about raycasts! subbed for more :)

@ampomahwinston3436 Жыл бұрын

thanks a lot, timeline: 5:00 - 5:10, literally assisted me in an issue have been facing for 2 and half weeks.

@GameDevBeginner Жыл бұрын

Glad I could help!

@joemitchell7420 Жыл бұрын

this is exactly (and i mean exactly) what i needed thank you so much :D

@thecopymaker2664 Жыл бұрын

Id used Raycasts in Unreal but never Unity, while being almost the same thing, I was struggling, this helped alot!!

@estam7264 2 жыл бұрын

Your videos are awesome man! Seriously the best unity tutorials on KZfaq (I just started using unity so take this with a bit of salt)

@GameDevBeginner Жыл бұрын

Awesome, thank you!

@timothy_synth 10 ай бұрын

This video is fantastic, thank you 👍🏻

@Director414 9 ай бұрын

Great video! SUper awesome, many thanks! :) Keep up the good work!

@nahuelhemsi 4 ай бұрын

This content is underrated

@user-yq9ro8hx5m Жыл бұрын

so clear 👌🏼,I like the way you explain

@GameDevBeginner Жыл бұрын

Thank you!

@eltinhonunes 3 ай бұрын

Great video, thanks, your didactic is amazing

@NanoGamingGamer 3 ай бұрын

7:00 - you can also use 2^9 = 512. and if using multiplayer layers then just do 2^9 + 2^4 and you have your int.

@gctsquaternion6510 2 ай бұрын

Amazing... thank you!

@otrqffaimajg 6 ай бұрын

Best explanation!

@patpatmo3171 Жыл бұрын

nice tutorial, thanks

@EigenA Жыл бұрын

Great work

@MrZtapp 10 ай бұрын

Very good thanks

@olevareee3742 Жыл бұрын

This is an amazing video! I have been trying to get into coding and game development and this has been a lifesaver. It was super useful as it not only explains how to implement it, but also how it works, what does what, the different variants and even small things like Raycast all, non-alloc, and 2D/3D. Great job, I look forward to watching other videos on this channel in the future! also, I was wondering how I could calculate how far the collision occurs along the ray? Thanks!

@GameDevBeginner Жыл бұрын

Thank you! Great to hear it helped you. Also, RaycastHit.distance is probably what you're looking for.

@olevareee3742 Жыл бұрын

@@GameDevBeginner Thank you so much!

@batnikelam-mavzer443 2 жыл бұрын

Thanks 4 the video

@MarekNijaki 2 жыл бұрын

Awesome video

@muhammadzubairirshad6724 Жыл бұрын

Just Amazing

@Hadys Жыл бұрын

good video thanks

@thebumblecrag61 Жыл бұрын

Fantastic 🎉

@TricoliciSerghei 9 ай бұрын

The video is great thank you.. But I'd call it, Thorough Raycasts in Unity.

@furizagold Жыл бұрын

thx sis

@jaylini2250 Жыл бұрын

This video was actually very well explained. You deserve a lot more subcriptions. :) I have one additional question, how can i get the direction of a Raycast and turn it around. To use is as an force to push away object in the same angle they have been hit? (Selfknockback in a shooter)

@GameDevBeginner Жыл бұрын

So, to get the direction of a ray from the point of impact, towards the origin, use: (Ray.origin - RaycastHit.point).normalized

@jaylini2250 Жыл бұрын

@@GameDevBeginner Thank you very much!

@random_precision_software 3 күн бұрын

You left one out... The one i needed to know about...... Im in the middle of converting my PC game to Xbox. I've got the mouse pointer moving with the Xbox controller sorted. BUT I've got a level selector which did use buttons on PC , but I can't get the raycast to work for the canvas, have you any ideas or do a quick tutorial? Thanks

@random_precision_software 5 күн бұрын

I was hoping for answers for canvas raycast 😢

@macademia_p7853 Жыл бұрын

Hi uh, i want to know, if you know about Steam VR player, it can be played without the VR and its going to use Raycast My question is, how to replicate those, i have strugle to implemented it so i can click the object that i aim in to, example the UI Canvas that trigered something if i press trigger on the VR that work with Mouse click as well.

@BorisAverin 8 ай бұрын

Супер

@GAMEBR0VIP2462 Жыл бұрын

how can i print the layer mask int that im looking at so i can find which one to ignore ?

@GameDevBeginner Жыл бұрын

I think you may be able to get the layer through RaycastHit > Collider > GameObject > layer

@NikELbErGErBergel 11 ай бұрын

This leaves the question open on what exactly a ray can hit. I have an empty gameobject that i want to be able to hit with ray what do I add to it so its hittable but does not get any other features like collision or extra visual things

@GameDevBeginner 11 ай бұрын

Add a collider, set it as a trigger and make sure that the raycast you use queries trigger interactions

@affenaffgaffel8330 Жыл бұрын

Hi, Great Video but I have one Question: how can I Calculate the direction from the Origin towards where the Raycast hit?

@GameDevBeginner Жыл бұрын

Vector3 direction = (RaycastHit.point - Ray.origin).normalized; should work.

@affenaffgaffel8330 Жыл бұрын

Thanks it works perfectly now

@pulaksarkar7845 Жыл бұрын

Hello Sir, I can’t able to add information by clicking different parts of a 3D object. Please help me , and if possible make a separate tutorial on that.

@xxxxx409 Жыл бұрын

colliders or raycast for 2d pixel art game ?

@brutosmomentos7355 Жыл бұрын

Does anyone know the color theme he is using for the sytanx?

@GameDevBeginner Жыл бұрын

It's the Gruvbox theme in Visual Studio

@brutosmomentos7355 Жыл бұрын

thx @@GameDevBeginner

@ChapCanai 8 ай бұрын

if this was easy then I don't think I wanna go advanced

@abg2487 2 жыл бұрын

How to make ping pong game in unity?

@jelleraffel5 Жыл бұрын

Hey why is my raycast saying it hits the object but the raycast is not showing, not in the scene view and not in the game view. This is my used code ' Ray ray; public LayerMask layersToHit; void Start() { ray = new Ray(transform.position, transform.forward); Debug.DrawRay(ray.origin, ray.direction * 100f, Color.blue); CheckForColliders(); } void CheckForColliders() { if (Physics.Raycast(ray, out RaycastHit hit)) { Debug.Log(hit.collider.gameObject.name + " was hit "); Debug.DrawRay(ray.origin, ray.direction, Color.red, 10f); } }' Thanks!

@GameDevBeginner Жыл бұрын

So your first drawn ray probably won't be visible because it only happens once in start and doesn't have a duration set. Your second ray should be visible for 10 seconds but will only be 1 unit long, so there's a chance you may not be close enough to see it? Otherwise it should work, I tried your code and it showed up as expected.