HOW TO RANDOMLY SPAWN ENEMY POSITIONS WITH C# UNITY TUTORIAL

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In this Mini Unity Tutorial I show how you can randomly spawn your enemy positions in your game.
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Who Is Jimmy Vegas?
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Jimmy Vegas is one of the top RU-vid tutorial developers. In depth Unity Tutorials teaching you how to make a game in unity 3d! My unity tutorials include development, programming in C#, coding logic and more. For beginners, it's easy how to learn unity with tips and tricks you can make a game for FREE. I provide FREE assets for you to use and learn.
Start your game development career today, for free. #JIMMYVEGAS #UnityTutorial #UnityTutorialForBeginners

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2 окт 2024

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Комментарии : 142

@b1ake377 3 года назад

ok so this helped massively and allowed me to progress in my game making, great video btw. how would i go about stopping the models spawning in the same place as it is random so that is a possibility?

@arkajyotiadhikary8504 5 лет назад

Sir make a video about .. How to make an enemy, Which can react to sound. Like if he hears the footsteps than follow the player. Thank you.

@fecoramirez 5 лет назад

Hope it's not late, but i think it should not be about reacting to the sound. The sound comes from an action, ie: If we wanted the enemy to react to the sprinting sfx, then we should make the enemy check the distance to the player and if the player sprints near a certain range, he should follow you. So it's not about the sound, but the action itself.

@fy-b07-causingrenato91 4 года назад

try making a circle using the gizmo function where you set the range and center it to your character then you would activate the circle by moving your character and make a collision code where if the circle touches the enemy or come close to the radius then the enemy would go react or follow the player

@ProdMGD 4 года назад

@@fecoramirez I'm late but excellent perspective.

@slipperysnowball2185 4 года назад

no im late

@ninetieschild9114 3 года назад

im Jordan.

@rhon5117 4 года назад

How do i make the enemies respawn or how do i recall this code when the enemies die. I want the enemies to continuesly respawn every 10s using the method used in this video.

@MRFATBEAR 4 года назад

Do you find the way how to do it yet ? I wanna know too

@nicolasazzi9215 4 года назад

@@MRFATBEAR ask on unity forums I'm sure you will find an answer

@fishman432 4 года назад

You can just make the number of enimes that spawn higher so it lasts longer

@johnathonbobe7953 4 года назад

have it when an enemy dies it removes one from the enemy counter edit: also have something that triggers the IEnumerator when one dies

@sed6673 3 года назад

did u try a do while loop?

@kersh8568 5 лет назад

Jimmy, I would love to make an asset for your next tutorial. I am a student in the US getting my degree in AR/VR in a few months and think I could help you expand your tutorials if we worked together.

@vilara8666 2 года назад

I have a bit of a problem. I destroy the enemy game objects when they die, but if the original enemy game object is destroyed, the script won't spawn more enemies because it doesn't find the reference. If I attach the destroying script to the enemies when they spawn, the original one won't disappear tho. Any ideas?

@owlstudios5933 Год назад

im having the same issue!! did u figure out how to solve this ?

@napoleonbonerfarte6739 Год назад

Prefabs

@piguy2829 4 года назад

I am new to this and dont understand Coroutine and IEnumerator. Whenever i try to use them i get an error, and when i dont the script starts making clones of clones. Can you help please?

@davidfattore 5 лет назад

Hey Jimmy, dude your tutorials are a godsend, please keep them coming. Even though I'm proficient in C#, I'm learning so many new methods and ways of observing and tackling all the little tasks I set myself, while I'm creating my Open World Fantasy RPG, which brings me to my request. If at all possible, could you create another mini tutorial involving a money system. A while back, I was working through your "How to Make a Game For Free (51 Video) Tutorial" as a sort of baseline and Ep. #7 with the coins got me thinking, would there be a way, if for example each of those coins was a different colour and as your picked them up, they were each calculated as a different denomination. (Red: $5, Green: $10 and so on) and have a overall calculation of the total money accrued as well as calculating the individual denominations. Could that be done? In my head as I'm thinking about it seems rather complex, so I'm hoping you can find a way to simply the method.

@nyanchangaming8523 4 года назад

Thank You bro I hope theres more tutorials

@philyorke-robinson226 3 года назад

Hi! Great video, this has helped me so much. Subscribed!! How would I edit the code to have the new enemies face another direction, rotating them by 90 degrees?

@david100awesome 3 года назад

rotate the enemy object its self

@dr_f1405 3 года назад

Did you find a solution?

@akashraj2488 3 года назад

Don't know where went wrong.. my while loop is not instantiating enemies. it just puts 1enemy in area instead of 10 each after 0.1f seconds. Below is the code I was using ! //code for spawning the enemies while (enemyCount < 10) { xPos = Random.Range(180, 216); zPos = Random.Range(97, 111); Instantiate(theEnemy, new Vector3(xPos, 0.6f, zPos), Quaternion.identity); yield return new WaitForSeconds(0.1f); enemyCount += 1; }

@ianpereyra5390 3 года назад

In the "new Vector3" you are using a number with "f" wich corresponds to time, not to position. That number is the Y axis position so try deleting the "f". This is one month late but I hope you managed to resolve the problem.

@buggus5702 6 месяцев назад

May the God bless you And my Final project too.

@zubbag 4 года назад

hi great vid is it possible to duplicate the spawn object? also the enemy spawns in the same location when i press play is there anyway of fixing it? many thank keep up the great content

@Debugg 3 года назад

Hey how can i increase the amount of enemy by time . :D

@Andrelas11 3 года назад

Think about what type of data you will be working with. This always helps me work my way through what I might need to do. You want to the number of so you can create two variables that hold those value. private int maxEnemies = 10; private int enemyIncrease = 5; You want to increase this number . Thankfully Unity already has methods available to let you operate with time such as: Time.deltaTime Now you can set up a separate method that will track the time and then increment the maxEnemies(10) by your enemyIncrease amount (5) to give you a new maxEnemies variable of (15). You will have to figure out exactly how long you want to wait between each increase. Make sure to use "+=" so that Unity overrides the maxEnemies variable each time the method is called. Otherwise it will default back to the value we set above (10) and then add the enemyIncrease (5) and the number will always be 15. Using "+=" will override the previous maxEnemies variable and reset it to the new value each time.

@PIGQuiky 4 месяца назад

not sure ill ever get a response to this but ive tried so much googling already... any chance you could show a way to exclude coordinates inside that range? like say you didnt want them spawning in a 5x5 area. i cannot find an answer on how to do this for the life of me

@JimmyVegasUnity 4 месяца назад

what you could try and do is add some logic gates like.. if x > 2 && x < 3 then you’d restart the method so basically it will check to see if the x position is between 2 and 3.. so that would be like an exclusion zone. naturally do the same with the Z too

@andygao4389 4 года назад

How would I do this if I wanted enemies to spawn on a trigger, way walking over a block?

@JimmyVegasUnity 4 года назад

Put the code inside OnTriggerEnter and attach it to a cube and tick IsTrigger in the collider :)

@trevorclifton7361 Месяц назад

1: make the DropEnemy coroutine public 2: give the block a reference to the GenerateEnemies script 3: Using onTriggerEnter with the block, call your EnemyDrop through your reference like this: reference.StartCoroutine(EnemyDrop());

@DidoeS 3 года назад

For some reason even without the While loop for me is spawning endlessly... any ideas how I can fix it ?

@ecayeta 3 года назад

You need the while loop so it's not spawning endlessly

@trevorclifton7361 Месяц назад

Like ecayeta said. The while condition is the only thing preventing it from spawning enemies endlessly. Without the condition saying "so long as there are less than 10 enemies, spawn an enemy," the corountine would just spawn an enemy every 0.1 second.

@esi2047 4 года назад

that helped me a lot thank you

@latteNmusic 4 года назад

Thank you for this! It works nicely!

@lucafrancis5572 8 месяцев назад

Amazing. Amazing. Amazing. So simple yet exactly what I needed. Awesome tutorial. Keep doing what you're doing man

@takuya2431 4 года назад

Hey, Is there any way that i can multiply the " Instantiate(enemy, new Vector3(xPos, 2, zPos), Quaternion.identity); " code by the number of waves? I cant really figure it out. I managed to make the enemies disappear on colission with my gun and the code repeats itself once the "enemycount == 0". The wave also increased by 1 when "enemycount" reaches "0" Thanks in Advance

@PanikGrafik 4 года назад

What do you want to do? Add 1 enemy on wave1, 2 on wave2 etc? If so, have an int that stores which wave you are on and run the instance that number of times, or append the while-parameter.

@trevorclifton7361 Месяц назад

Make the 10 in the while condition a variable so that you can change it depending on the wave, and then once all enemies have been defeated, call it again. Optimally, you would check if all enemies have been defeated in the same script that kills the enemies.

@Liam-nl5yv 5 лет назад

Cheers mate

@LeeTGame 5 лет назад

Thanks. Very clear. :)

@nullptryt 3 года назад

This is exactly what I needed thanks bro!! Subscribed!

@JimmyVegasUnity 3 года назад

you're welcome :)

@Samurai-fx8cu 3 года назад

Thanks bro huge help but my game crashed like 100 enemies spawned lol

@ruben6403 2 года назад

ty helped me sm

@littlermganimations2568 3 года назад

This helped but for some reason they are spawning on a grid is there any way to fix this

@JackaldudeVR 3 года назад

I’m having an issue. using your example if I were to kill one of the 10 enemies spawned in the enemy count isn’t going down and therefore aren’t spawning new enemies. What do you think I’m doing wrong?

@JimmyVegasUnity 3 года назад

Good question. Place the original enemy below the map on a random cube.

@josho1994 4 года назад

It says this- error: Assets\scripts\EnemySpawnerScript.cs(12,17):errorCS1002; expected

@hotdogg2134 4 года назад

you probbably forgot the ; at the end of a command if not this is not enough information to just tell you what the problem is

@slipperysnowball2185 4 года назад

when I do it it says cant convert double to float

@dragomirpetrov5600 4 года назад

You need to put an "f" at the end of the value to register it as a float

@MrPablosek 2 года назад

Can I somehow make the enemies spawn at a local position? My rooms are randomly generated.

@closed9009 5 лет назад

Your explanation is very good, very useful and easy But if you can explain to us how to make a multi-player game Thank you

@hellofun6496 5 лет назад

I love you .. please keep going

@DavidAdochiti 3 года назад

i made 999 into 1k! :DD im proud of myself :D

@BlondiFoks 4 года назад

Hey, when I destroy real enemy in the game, the code crashs. However when I destroy clone enemy, no problem. Please help me.

@hitman7860 4 года назад

make the enemy prefab and then remove the real enemy use only the prefabs

@funja Год назад

Awesome thank you Jimmy , How do i make them follow the player as soon as they appear ?

@PoopEaterr_27 Год назад

Funja are you still interested in coding this? I may have an answer for you!

@zartl10 3 года назад

Thank you so much for this! Subscribed!

@MrHyenaYT 5 лет назад

wolfenstin 3D ep 12

@Infernoz5 3 года назад

Im having problems with changing the rotation of the enemy could you help

@JimmyVegasUnity 3 года назад

That's to do with AI, not spawning. I don't even know your AI set up, so I'm unable to help without knowing. I have plenty of tutorials on AI though

@trixter380xzgaming 4 года назад

How do you limit the amount of enemies spawned as well as how to delete them after they leave the screen

@jakelisacki7656 3 года назад

IDK how it happened but your code broke my game hahaha.

@jakelisacki7656 3 года назад

I figured it out. I attached the Script to my enemy instead of empty object. I DO NOT RECOMEND hahahaha

@wrayth3951 Год назад

If you wanted a random number of enemies, could you also enemy count random range? Also, what if you're attempting to put in more than one enemy type? Would a separate script for each be best, or perhaps just additional ones in the original script?

@trevorclifton7361 Месяц назад

Yep. Create an array containing all of the different enemies' prefabs* (called, say...potentialEnemies), and then in the Instantiate of DropEnemy, use potentialEnemies[Random.Range(0, potentialEnemies.Length)] * to do this, say "public GameObject[] potentialEnemies;" and then in unity editor drag in all of your prefabs into the array.

@leolizard3152 5 лет назад

Thanks! This will help me out a lot.

@mmazuk1958 2 года назад

Thank you for this tutorial!!!

@dragomirpetrov5600 4 года назад

The IEnumerator shows an error if I place it outside the Start function.

@JimmyVegasUnity 4 года назад

you’ve done it wrong then. a coroutine cannot exist inside a method

@dragomirpetrov5600 4 года назад

@@JimmyVegasUnity I guess I did something wrong because now everything is OK with the code. Unity is taking 5mins to load so I can't test it fully. Thank you for the tutorial though. It helps immensly. Is there any difference in the code if we're using Unity 2020?

@JimmyVegasUnity 4 года назад

code is usually the same in any version. there may be minor changes in some libraries, but code we wrote, say 5 years ago, will still work now 👍

@DavidAdochiti 3 года назад

what if i want to keep spawning enemies? for example i spawn 10 enemies, wait 5 seconds, spawn another 10, etc?

@kieranrutherford4818 3 года назад

Hi, i know how to do this. Do you still need to know how to do it?

@DavidAdochiti 3 года назад

@@kieranrutherford4818 yes please

@williamandrade1455 3 года назад

This video helped a lot!

@hyuhragnarook 5 лет назад

what building pack is that?

@erlanggachakra1074 5 лет назад

how do i attach a script on the instantiated clone object? if it hasnt spawn yet?

@fy-b07-causingrenato91 4 года назад

its a prefab

@Daviejones00 3 года назад

How do you make it to where they only spawn when a player come into a certain distance of them?

@trevorclifton7361 Месяц назад

Assuming you have an empty centered in the middle of the room like this guy did, you could just call the DropEnemy coroutine when the player is a certain distance from the empty. First, get a reference to the player's transform, then use Vector3.Distance(transform.position, playerTransform.position)

@levaneva8178 2 года назад

Error :\

@ankitkc9213 4 года назад

public variables are not showning in inspector please help..

@JimmyVegasUnity 4 года назад

Is there an error in the script?

@ankitkc9213 4 года назад

@@JimmyVegasUnity no

@mlgpro60 5 лет назад

Could you explain your code more or summarize what important parts do BTW I like the vid 😄👍

@trevorclifton7361 Месяц назад

I think he explained it pretty nicely; what do you need help with?

@karlee8608 5 лет назад

You are awesome Jimmy Keep it up

@blockthechainer 5 лет назад

How you can spam the enemies slowly, like appear 3 secs later the last spam

@JimmyVegasUnity 5 лет назад

On the line with WaitForSeconds, change the value to 3

@blockthechainer 5 лет назад

OMG i fool myself @@JimmyVegasUnity i didnt watch that lane OK ty btw hehehehe feel like a total blind noob right now ty tyt master

@Andyyyyyy8 5 лет назад

Hello! Great Video! How can I set the minimum distance between spawned objects? Thank you!

@Andyyyyyy8 5 лет назад

I should say that the Collider can't be used, since I have a trigger on it. How should I do it?

@Andyyyyyy8 4 года назад

@kyan ryan ok. Thank you :)

@mehmetkans1302 5 лет назад

Hey, Jimmy. Great videos. I was wondering if you could change the value of spawning enemies while in game like a Call of duty zombie round system. Each round it spawns more zombies. Do you have any suggestions for that? I could make dozens of Ienumerators for each round but that wouldn't be really praticial, would it?

@sherrodfinley6745 4 года назад

Did u come up with a solution

@panickal 2 года назад

You could raise the amount to the power of 1.2 or something like that.

@trevorclifton7361 Месяц назад

Yep so whenever a new round starts, change the 10 in the while loop and recall the coroutine (make the 10 in the while loop a variable)

@adkinsy85 5 лет назад

Do you know how to respawn same enemy when player kills him ?

@legendaryitem2815 5 лет назад

Look into object pooling. You can then have a set number of instances of enemies which you can reuse.

@adkinsy85 5 лет назад

@@legendaryitem2815 object pooling ok thank you brother 😁 Also can you tell how toadd a grab attack like if player grabs enemy Then he can chokslam him in a 3d game ?

@thomasglassbrook7778 5 лет назад

@@adkinsy85 Another way to do that would be .. (youll need to add on the rest of his code but this will let the,m dissappear and reappear when their health reaches 0 ) public int EnemyMaxHealth; public int EnemyCurrentHealth; // Start is called before the first frame update void Start() { EnemyCurrentHealth = EnemyMaxHealth; } public int respawnTimer = 5; public void DamageEnemy(int damage) { EnemyCurrentHealth -= damage; if (EnemyCurrentHealth < 1) { //Destroy(gameObject); this.GetComponent().enabled = false; this.GetComponent().enabled = false; Invoke("Respawn", respawnTimer); } } void Respawn() { //FindObjectOfType(); this.GetComponent().enabled = true; this.GetComponent().enabled = true; } }

@irtizamazidrhythm9736 5 лет назад

First one

@sirrcrispy6631 5 лет назад

Thankk youuu

@rickmasterKKK 3 года назад

How can i respawn them?

@trevorclifton7361 Месяц назад

If you want more enemies to spawn (like a round system that gets progressively harder) make the 10 in the while loop a variable and increase it every round. Then, call the coroutine again.

@ZiRR0 4 года назад

Thank you!!!

@Volltagge 4 года назад

unity crashes when i use"while"

@Andrelas11 3 года назад

Sounds like your stuck in an infinite loop. Once the code hits a while statement it will run that portion of the code until there is something that tells it to stop which is what you are putting in the parenthesis after the "while". My guess is your enemy count is never reaching your set max enemy parameter in the method either because a variable isn't set right or your not incrementing by 1. Anytime I do a while loop while I am developing I like to code in a safeguard that stops the loop in case I forgot to set up a condition properly. Otherwise its very hard to get Unity to respond once its stuck. You can either implement that into your game to prevent crashes just in case or remove it once your loop is working appropriately.

@trymeielsen5299 5 лет назад

How to you make them spawn forever

@brunofontelo1262 5 лет назад

did u find a way to do that?

@dronecon5006 5 лет назад

Spawn Forever private float xPos; private float yPos; private float zPos; public float spawnNext = .1f; //Time until next spawn! public bool startRightNow = false; //Enable to spawn an enemy at the start. public GameObject theEnemy; //put an Enemy into this slot. private void Start() { if (startRightNow) { EnemyDrop(); } } private void Update() { Invoke("EnemyDrop", spawnNext); } private void EnemyDrop() { xPos = Random.Range(0, 50); yPos = Random.Range(40,41); zPos = Random.Range(0, 30); Instantiate(theEnemy, new Vector3(xPos, yPos, zPos), Quaternion.identity); } The key here is Invoke(). If you're only setting this once, and you don't need the ability to change the timer from emitter to emitter, you could also write: Invoke("EnemyDrop", 1f); This would create an enemy every second until the program was stopped. Invoke("EnemyDrop", 0.1f); 0.1f Will Invoke the EnemyDrop() Method 10 Times Per Second! If you're killing the Enemies, you may want to look into Object Pooling. If you're just spawning crap to see how long your computer will last before it crashes, this will do it!

@ok_doge608 5 лет назад

make door system tutorial

@JimmyVegasUnity 5 лет назад

I already have... Many times

@irtizamazidrhythm9736 5 лет назад

Oh .. oops second one

@peterriley9913 5 лет назад

So this is literally the third

@hungamesdev 5 лет назад

How to do not spawn on each other the enemys?

@JimmyVegasUnity 5 лет назад

Colliders and rigidbody

@hungamesdev 5 лет назад

@@JimmyVegasUnity Not works for me. If a set the rigidbody to kinematic, nothing change, enemy spawn on each other. and if i set to not kinematic and the enemy spawn on each other the enemy fly away.

@brunofontelo1262 5 лет назад

how to make the enemies spawn forever pls?

@JimmyVegasUnity 5 лет назад

That is not advised. Why would you want enemies spawning forever? that will inevitably freeze the game up because you're creating an infinite loop.

@brunofontelo1262 5 лет назад

@@JimmyVegasUnity i need that in my game Its a project for school

@brunofontelo1262 5 лет назад

@@JimmyVegasUnity can u pls tell me how to do that

@JimmyVegasUnity 5 лет назад

I am telling you now, no. That is NOT something you should be doing. Like I said, infinite loops will break your game.

@brunofontelo1262 5 лет назад

@@JimmyVegasUnity ok thanks, but can i make a if that calls your spawn generetor?