Spawning Objects in Unity [Using Instantiate]

[@pressstart6864]

Copy & paste source code: pressstart.vip/tutorials/2018/09/25/58/spawning-obstacles.html

[@myworld7667]

i need some help, can you help me... i copy the code but i dont know how change rocks movement from below to up.... i try the code but when i play the scene the rocks its not found but it is work....

[@myworld7667]

i dont know where is my fault

[@moncicis]

that code used in perspective camera...not orthographic

[@leostudios5700]

The code is not workkng for me and i dont know why it says i have have no where to put the asteroid prefab or the respawn time it wont pop up kn the knspector

[@pegassus-oj1zj]

@@myworld7667 did you change the axes

[@Tanicorn]

"Quarantines can look scary but they're actually quite simple" The World:"Sorry what I don't understand?"

[@soaringsquid0.129]

TaniCorn I think you mean coroutines

[@thenukdevendra1902]

Look where we are now and you might understand lol

[@zombiepigmandude7759]

@@soaringsquid0.129 r/woosh

[@cryo7180]

YES THIS, i was like.... is it supposed to be Quarantine... or Co - ROUTINE?!?!?!

[@Gir_0]

IKR

[@inigoarribillaga1183]

I see you haven't uploaded in a while. I wanted to let you know that all your videos have been very helpful to me and that I would like to see more content from you, if you can of course. Thanks for your service.

[@pressstart6864]

Thanks bud! Don't worry I will be posting videos again soon. I needed to take some time off to build out a website and do some rebranding, and things like that. Hopefully by the end of this month I'll have a consistent posting schedule. Cheers!

[@JakeSimmer]

Hi, I just found this channel and it's very clear to follow along, but also I've been watching alot of vids these days because of the steep learning curve... It starts to make a little more sence now...

[@mrlloydval2887]

i'm very new to unity, c#, making games and stuff. i don't have a deep understanding of most of this, but i noticed that the code you used here 4:29 "if(transform.position.x < screenBounds.x)", the < screenBounds.x part only seems to work when the camera projection is set to perspective. i've been using the orthographic camera projection because i was told that it's better for 2d games. if not would you mind explaining the difference? also do you plan on making a tutorial like this for an orthographic camera projection?

[@pressstart6864]

The simple answer is perspective camera inverts the screenBounds value. So if you’re dealing with orthographic either multiply it by -1 or flip the if statements. Hope that helps

[@mrlloydval2887]

@@pressstart6864 thanks a lot for the information. i was able to get it to work with orthographic projection when i multiplied it by -1. i wasn't able to figure out how to get it to work by flipping the if statements though.

[@thenukdevendra1902]

1 of the only youtubers that actually explain in a way that even beginners can understand.

[@nabilbensafi]

Hi , I appreciate the video. Just a quick question : so I'm working on a simple 2D side scrolling runner, the idea is to deliver Pizza to randomly generated houses : green red and blue ( to add a bit of challenge ) , will the script you provided in this video work ? I've been trying for so long but I can't make the houses spawn after the player collides with them. Any help would be appreciated. Thanks.

[@DJ-xx7qi]

Is there a way to cycle through several asteroid prefabs in the spawn?

[@amor6611]

I have a small question, I'm shooting bullets, although it seems I'm creating multiple bullet game objects and I only want to fire one of them when the space key is pressed, how do we limit the rate of a prefab?

[@Berniebud]

9:35 OK FINALLY I was so confused because nowhere could I find where you actually reference the prefab itself god bless you

[@davidtelloph]

I dont have it and i already save the script, someone help?

[@knightmarerip711]

This is pretty neat and so simple. Very well explained! Excellent job!

[@pressstart6864]

Thanks dude

[@quessure6293]

my object disappears on play. help

[@1984ordep]

from the amount of LIKES it seems a lot of us have the same issue my self included. they flash quickly at the left side of the screen...

[@primebalpreet5214]

Maybe because of camera. Go to camera and change projection to Perscpective

[@apinoita]

@@primebalpreet5214 kiitos! (Thanks in finnish)

[@darkknight2825]

@@primebalpreet5214 thanks that works

[@eduardo-zf2eo]

@@primebalpreet5214 thx 🙏🏻

[@figgi_myestrio5092]

I was searching for a solution for months and you explained it very finely. I liked and subscribed. :) Thank you. :)

[@Thornlock]

Great tutorials dude! Really hope you keep making these

[@pressstart6864]

Thornlock thank you for the support. I’ll be taking off the month of December to work on another project but after that I’ll be posting at least once a week.

[@Nerodess]

I followed your tutorial step by step. My script is identical to yours (have checked for 1h). But nothing seems to spawn. If I put an asteroid manually in, it does, what it should. but if I remove it and try using the prefab, it just doesn't spawn anything... pls help! (using the 2019 Version of unity)

[@Dorodigital]

yeh this is Bull! same thing happened to me no spawn

[@gokcekapci]

Maybe you won't answer but I still want to ask. You wrote the respawn time as "WaitForSeconds(RespawnTime), but I want it to create a new object for each disappearing object condition, not time. So the respawn condition is for another object to disappear. How can I do this? Thanks in advance for the information you will provide. I wish you good work.

[@jadthoumy8561]

hey mate, I'm having issues I've copied and pasted the same code for destroying the asteroids but they are being destroyed at runtime, any suggestions? Please respond me fast, I have an assignment to finish

[@vletsy]

Idk if your still respone but i have an question how to let the astriod fly down unstat of to the left

[@pressstart6864]

Change the velocity to be on the Y axis

[@anttiuusoksa549]

@@pressstart6864 I am beginner of coding and my question is what I have to do to change the velocity to y axis. Hope you respone quickly

[@kingmuzzy]

My object will not delete when off the screen not sure why maybe there is a problem with the camera bounds , any suggestions? (I had to change the code to what you put in the comments, to make my prefab appear on the screen as it wasn't showing with your original code)

[@julian_phoenix]

Bro, you're AWESOME. The only one in the whole World Whide Web who helped me out with exactly what I needed. Muchas gracias

[@erika2_2]

At 9:01 you said we could use a boolean that changes to true when the game is ready to start. How do I know when the game is ready to start? Because my game has a title and doesn't start right away, so i dont want the enemies to spawn before the game actually begins, but how can I do this?

[@jahmaijones6331]

If i were to do this for a top down shooter i should just replace the values with Z instead correct ? im trying to do this for a top down space shooter

[@pressstart6864]

It's relative to your camera. You could just rotate your camera or yes change certain values. Not every project is going to be the same.

[@psychospoiler]

This really helped me for my mini platform game assignment. Thank you!

[@SebastianDrews]

Thanks man, just what I needed, will definitely use this knowledge for my project! :)

[@MyThatsCrazy]

i'm getting an error saying object referance is not set tto an instance of an object for this line of the code and its saying it for both scripts screenBounds = Camera.main.ScreenToWorldPoint(new Vector3(Screen.width, Screen.height, Camera.main.transform.position.z)); any one have any suggestions on how to fix this?

[@pressstart6864]

You need to set your main camera. Basically it's just a tag in the inspector. Set it to main and the code will work

[@matheussouza7758]

Thanks for the video. Is there any problem of moving the player X or Y on a infinite runner instead of keep the player stood still and move the bg?

[@_pratyush]

Hey can anyone help me! My Game Object (Asteroid) is spawning way behind the camera view and gets destroyed.

[@LeoK51]

me too

[@lildgamedev6885]

Hey this is great thanks! my question is I wanted to add a different object to be spawned so I made a new coroutine, but for some reason that one never spawns its object. Is the first coroutine interfering?

[@daichi_devs]

Hey man just wanted to say this was such a great help for me. You are awesome, keep it up!!

[@jameswood4853]

I’m am working on a project for college and this really helped me out, however I’ve been trying to connect it alongside a network manager and I can’t get the second asteroid script to work like they just don’t spawn in. Any tips?

[@boniebob7200]

When the camera projection is "perspective" the objects despawn normally, but when I set it to "orthographic" the objects spawn faster than they can despawn. Can anyone help, plaease?

[@victor1102]

Thanks for the video! Just one question, why use this.GetComponent instead of just GetComponent? Thanks!

[@ivanpopovic9501]

hey, i have problem, when my first prefab gets destroyed, unity stops cloning it since it's destroyed any solution for this?

[@lassespfs4570]

Dont have your prefab in your scene just add it to the camera

[@randomdev9976]

dude you give me a jumpscare with that intro

[@nxt_tim]

How would you try giving the spawning transforms of the 2nd spawning object a bit of a minimum distance from the spawn transforms before? What I mean more precise: I want to spawn several objects in a scene but they won't move nor disappear after they spawned. They should spawn in a pre-set area with a pre-set number of objects that spawn, but they should all have a minimum distance around them, so that the meshes won't overlap. I'm still rather new to coding so I'm not always quite sure what can and can't be done, would appreciate the help ':D

[@tomsted2902]

Simply amazing. It's hard to find such a good quality tutorials like yours. Thanks a lot :)

[@huzaifa8530]

He does not even damn!! Explains it Whats the thanks for

[@AhmedAymanM]

The screenboundaries code is correct, it should be something like this: if (transform.position.x + screenBounds.x < 0)

[@TheHumanSystem]

This was very helpful, thank you! You describe it well. I was able to get this to work, but the scene REALLY slowed and became very choppy in play motion. It is a simple 2D low resolution game, but there are about 200 gameobjects as this is the biggest scene. Is that an issue? It runs perfectly before adding this script with no lag or even a hint of issues.

[@TheHumanSystem]

UPDATE: After I added it to a different (smaller) scene, it didn't seem to be an issue and even after I deleted it from the (larger) scene it was still choppy. I rebooted and still choppy, so I guess my computer was just getting over loaded with too many gameobjects.

[@caseymckinney8377]

Also is there anyway to code it so instead, it seems like the enemies are 'dropping' from the top of the screen to the bottom?

[@pressstart6864]

Yes just reverse the code to work for the Y axis: a.transform.position = new Vector2(Random.Range(-screenBounds.x, screenBounds.x), screenBounds.y * 2); Then modify the velocity also, or just add gravity.

[@caseymckinney8377]

@@pressstart6864 Amazing; thank you so much! Currently working on a game for my university assignment, and your tutorials are a HUGE help!

[@gregbriggs9225]

So I believe as TaniCorn is pointing out, it should be pronounced co-routine, not Quarantine, although that's all been on our mind recently. EDIT Thanks for the great vid!

[@SanityPotion776]

Hey! great tutorial! Is there a way to increase the rate at which the astroids spawn over time? I would like them to spawn more frequently as the game progresses.

[@zedgaming4756]

i have the exact same question

[@sameeragrawal2897]

Decrease the respawn time variable value

[@elcolorblind4700]

hey , i dont know why i cant put a prefab as you do in your video. It simply does not give me the option :/ what do i do?

[@pressstart6864]

Hey, to create a prefab you need to drag your GameObject from the Scene window to the Project Window.

[@OliverJ440]

Thx. This is mega helpful. I have been looking for this for a long time, now i found it!

[@quacks4321]

i really like your tutorial. But i want to make a game that needs to spawn obstacles from above and when i tried changing the code i couldn't figure out how to make the spawn above (on the x axis) please help me out.

[@tuando8511]

Hello, why do i have this error? MissingReferenceException: The object of type 'GameObject' has been destroyed but you are still trying to access it. Your script should either check if it is null or you should not destroy the object.

[@pressstart6864]

You probably put the code in the wrong place.

[@charlado8597]

@@pressstart6864 i put it in the camera

[@milo1269]

I was wondering how you would make the Asteroids spawn downwards vertically, instead of horizontally. Thanks.

[@milo1269]

@KeepenCool Thanks! I managed to get it working!

[@Prankbros299]

@@milo1269 pls can u explain it to me how

[@Skildepadde]

Hey, can someone help me with a problem I am running into? So I am trying to make this script but instead of the asteroids going sideways I want them to go down so I did that but now the asteroids are going down on one line. In the "deployAsteroids" script I have tried to change "screenBounds.x * -2" to "screenBounds.y * -2" I have also tried to change the Random.Range screenBounds to x instead of y. Btw I am a beginner coder so I am sorry if it is something obvious.

[@ahnungsloser4157]

Hey! There is a bug .... My Obstacles dont despawn and are spawning only there where the camera startet but when the camera is in another position the Obstacles are still spawning there where the camera was at the beginning... Can anyone help?

[@kubakakauko]

I will leave this comment just for stats. i would love for your channel to get big

[@pressstart6864]

Thank you for the support :)

[@krishshah1806]

For some reason, whenever I run my game, the asteroid disappears right way. Anyway I can fix this issue?

[@lordcatington8188]

Idk if you still need this but change the camera to perspective (I had the same problem, this just doesn't work with orthographic that's all)

[@Iontaraxia]

@@lordcatington8188 had same problem as his, thanks m8

[@ethannewman963]

@@lordcatington8188 Thank you so much you really helped me

[@AaronDerpy]

@@lordcatington8188 Thank you very much!!

[@sharaharan3483]

Hi , I tried it for Y axis, but the "DEPLOYASTEROID.CS" did not work for me. I tried changing the x axis to y axis, but the spawning didn't work. Pls help me. Thank you.

[@gabrielbrazeau835]

Super video!! Only thing is that you've could use the asteroid width instead of the (* 2/-2), but for the rest great job !!

[@jangramann4411]

thanks!!!

[@flamed4967]

My enemies are just spawning off to the side not even in game view :/ Any help?

[@JaquanGrand]

mines to any help

[@JustDoom]

same

[@mikemitchley384]

Hi, how do i change the amount of objects spawned at a time i want to increase it as the game continues?

[@davidregalado3037]

How can I make more obstacles spawn through the progress of the game? Also great tutorial.

[@MrChubbyCheeksss]

Your method is simple and great but whats the difference on your coroutine against invokerepeat?

[@Christ0hell]

Not sure what i have done wrong here but the object i want to be deleted off screen immediately deletes itself. Checked code over and over not sure what i am missing.

[@cookieceleste]

In the Update method, try multiplying your "screenBounds.x" by -1, like this -> if (transform.position.x < screenBounds.x * -1). Looks like the problem is he was using his camera on "Perspective" mode, when most of the time we use it on "Orthographic" mode for 2D projects, and that reverses some things.

[@cgnotavailable]

What is the best resolution to an image to get it to

[@markrepac9739]

i need help because when my mane object is destroyed the clones are not spawning any more can someone tell me whats wrong

[@jansvec3855]

If i want spawn only one prefab after the Last one prefab is destroyed. How i can do that?

[@Sheffy_TF2]

when i use the Removing objects from the scene once they leave the screen script its just destroys the objects even if its seen by the camera

[@caseymckinney8377]

my enemies just seem to glitch off the other side of the screen, without appearing in the game view at all; any help

[@pressstart6864]

Is your camera moving or is it static?

[@caseymckinney8377]

@@pressstart6864 It appears static, but it turns out it's technically moving? I tried the code you suggested to someone having a similar issue and it resolved my problem :)

[@juncooo7505]

@@pressstart6864 I have the same issue. My camera is moving

[@JaquanGrand]

@@caseymckinney8377 what was the code you used to fix this issue

[@rohitrana2312idk]

@@JaquanGrand I had the same problem, idk why. I destroyed the item with a timer, instead of screenbounds

[@dimigif526]

great tutorial dude but I have a little question how do I make the enemies disappear after leaving the screen on a moving camera?

[@mando7176]

I encountered a problem here. my clone of asteroid spawns for a few miliseconds, then after the main one get destroyed, no clone spawns..'

[@abdullahali7237]

same

[@anhtuan528]

Could you please explain why did you multiply the bounds to -2 but not 2? 2 sounds more legit to me actually. Follow up question is could you have a video explaining what is Camera.main.ScreenToWorldPoint? I read the API but have no idea what they're saying. Thank you very much.

[@notbotpot7559]

i followed everything step by staep and even copy and pasted the code but i get the errors the asteroids arent spawning heres the errors NullReferenceException: Object reference not set to an instance of an object asteroid.Start () (at Assets/asteroid.cs:17) and NullReferenceException: Object reference not set to an instance of an object NewBehaviourScript.Start () (at Assets/NewBehaviourScript.cs:14)

[@rojinx4162]

The line if(transform.position.x < screenBounds.x) { Destroy(this.gameObject); } seems to destroy my camera so i cant see anything happening in the game, how can i fix this?

[@silver440]

void Update () { if(transform.position.x < screenBounds.x * 2){ Destroy(this.gameObject); } } thats what the source code said, i think you might have forgotten the * 2

[@rojinx4162]

@@silver440 I think i had the script bound to my camera, so the camera would destroy itself lol, and ty for the reply btw

[@silver440]

Oh lol, I just realized that the * 2 was nothing more than padding, so it shouldn't have affected the camera. Nice job though and good luck 😃

[@mando7176]

MissingReferenceException: The object of type 'GameObject' has been destroyed but you are still trying to access it. Your script should either check if it is null or you should not destroy the object. and says this in console...

[@pressstart6864]

Follow the video exactly. More than likely you placed the asteroid.cs on the wrong object. It should go on the asteroid prefab.

[@ettolamedica9987]

Potato Is Pro try right clicking on the asteroid (in the herarchy) and press unpack prefab completley

[@charlado8597]

@@pressstart6864 i had the same problem

[@loghanveilleux]

it fixed my problem that i was having with my spawn system thanks a lot😎😎😎😎😁😁😁😁😁😁😁😁

[@robby.108]

Hey, I have a question. How can I rewrite this code to make the asteroids fall from top to bottom?

[@Prankbros299]

@Jurgen Thank You so much!

[@Prankbros299]

@Jurgen But in the code where it destroys it self when it touches the end, it instantly destroys it self when u press start

[@noncraftx8790]

I made a game with Camera moves with Player please how script must looks to be good?

[@kuritsu6239]

Just a great tutorial as always ! thanks Can you explain us how to create the space background ?

[@pressstart6864]

I used a particle effect. For start size choose a value less than 0.1 and then under Renderer > Material choose "Sprites - Default". Then just rotate it 90 degrees.

[@kuritsu6239]

@@pressstart6864 Great ! It looks so awesome !

[@rojinx4162]

How do i delete the asteroid after it leaves the y axis? iv used the script: void Update() { if(transform.position.y < ScreenBounds.y * 2) { Destroy(this.gameObject); } } but it deletes itself at any point on the screen.

[@rojinx4162]

Im using an orthographic camera if that helps

[@pressstart6864]

If using orthographic camera use -screenBounds.y

[@pressstart6864]

Or multiply by -1

[@stejothepisto]

So I'm making a doodle jump game, what do I write instead of screenbounds.x and screenbounds.y???? edit: I'm guessing I have to refer to my destroyer somehow?

[@Prankbros299]

if u know how to pls tell me

[@myworld7667]

thankyou very much but how i make the rocks move from below to up?????

[@abdullahamjad3612]

sir How can i apply such CODE in an 3d runner game when camera is from behind

[@idriveships4047]

i have the same question

[@deraminator945]

Is there anyone who did the same but in 3D? I tried but that didn't went well

[@DH-yb7fz]

This actually worked for me! Thank you so much!!

[@AykutKaramanTV]

ORTHOGRAPHIC CAMERAS objects do not come out. How can we find a solution?

[@AykutKaramanTV]

Objects are outside the screen. How can we put the screen inside. ?

[@revel6016]

How do I spawn it in just a staight line?

[@shmowp5379]

my code says that Random is an ambiguous reference to unityEngine.Random and System. Random what do i do to fix this? if i add system.random my game says Random does not contain a definition for range

[@lachw4285]

same

[@mcbobber6913]

It doesn’t say any errors but it won’t spawn the asteroids

[@gattra]

Great video thank you. Why do you name your functions and classes without capitalizing the first letter?

[@lukakresoja5297]

Standarsation by a unwritten rule all variables are named like this : respawnTime , isColided , smoothingDone , isDeadByGravity (with the first letters uncapitalised)

[@ecapgaming2931]

It is great but what is corontine it says it doesn’t exist plz help when I delete it they don’t spawn 😢😢😢

[@mehva7382]

does this also work up and down? not just left to right

[@thanasisrks4944]

Thank you, this was very helpful, but it would be so much better how do to increase the spawn rate of the asteroids!

[@kdesh3336]

decreasing the respawnTime should work and increasing the respawnTime should make them spawn slower hope this helps :)

[@dragonballz3686]

Bro, how to make a set of enemies coming in a straight line or forming sine wave or in a circle formation like space shooter games.

[@VeryHappyCat]

Can you make it so that the clones get slowly faster the longer you play?

[@BhargavMarpu]

Thanq for the clear explanation.. It helped a lot :)

[@suspoocha]

asteroid look sick

[@mrhopeis6134]

This helped so much in my game. Thank you

[@j0kerplayz766]

What do i have to change if i the camera moves with the character, doesnt seem to work there. Nice Video BTW!

[@danyalkhan8923]

Same here, if you find a good way to do it Lmk

[@Prankbros299]

Is there a way that the astroids spawn in the top and go under?

[@elotusa]

My unity doesnt allow me to add onto my deloyasteroid script qwq idk how to make it work and its the same code used here

[@謝宗佑-u1m]

Rocks stop spawning after one of them being deleted, how can I keep them spawning?

[@pressstart6864]

You're probably deleting the object that spawns the obstacles. Try deleting the obstacles individually instead.

[@謝宗佑-u1m]

@@pressstart6864 I found where the problem was, I forgot to delete the prefab in the scene before launching the game LOL

[@Changelllelle]

Did you create a folder in assets called prefabs and added the rock in there? Then assign the rock from the prefab folder to the script that deploys the rocks, located in the main camera.

[@nosegoatpolo5883]

How did you solve the problem?

[@Abraham-om5ib]

@@Changelllelle wow thank you that was it :)

[@ohnsonposhka9891]

Clean explanation.. Great work

[@pressstart6864]

Thank you!

[@Prankbros299]

The asteroids doesnt start at the right side. It starts in the middle. Does anyone know what to do?

[@liamtinney5759]

my script completely ignores what i typed and destroys the gameobject instantly

[@ehawknut3797]

Please help me. Mine does the exact same thing.

[@PraveenKumar-pj9ls]

@@ehawknut3797 me too faced the same problem. Screenbounds.x gives me positive value (don't know how), so i gave minus in front of screenbounds.x inside if condition and works fine now.

[@CanisMajoris_star]

​@@PraveenKumar-pj9ls This worked for me. Thank you

[@Rxbsi]

Make - 25 instead of * 2

[@daynemoore7816]

you aren't a setup master without a set of cans around your neck.. I'm wearing a set now even though I don't know what I'm doing! LOL!

[@zenitherr]

i took the prefab and put it in the camera on the script but nothing is creating. i did exactly what you did.

[@allengullon624]

Hello how to instantiate prefab to the main camera position?