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Hello, guys.

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So in the last video we created prefab of a coin, right?

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And in this video I want to create a coin generator so we don't have to place a coin one by one on the

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level paths.

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We can just place a generator and it's going to respond 5 to 10 coins for us.

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Right?

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So let's do this.

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Let's create an empty object that's going to be named as coin generator.

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I'm going to reset the position for now, and I want that new script coin generator.

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All right.

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Let's go inside.

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Now.

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We're going to use instantiate function.

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You probably know it.

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We did use it when we created the level parts.

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Check this out.

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The generator we have here, instantiate right this one.

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So we're going to use it in a kind of same way.

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First, let's set amount of coins, so I'm going to do serialize field private int.

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Amount of coins.

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Right.

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And in the start, what I want to do.

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Let me delete the update.

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And what I want to do in the start is for loop.

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So how far loop works?

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And if you didn't see it before, it might feel confusing at first, but actually it's simple and it's

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very useful.

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So I'm going to just type four and click top twice, just like that instead of length.

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So here I'm going to type.

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Let's say, amount of coins.

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Let's just use the amount of coins.

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Now, how this works for loop runs in a cycle for a certain amount of steps, how you define how many

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amount of steps.

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So what it does, it takes an AI and set it to zero here.

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So AI is a first step and our first step starts from zero.

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Then it's going to run in cycle until I is less than amount of coins or any number you put here.

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In our case, it's going to be the number we choose later in the inspector.

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Right?

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So let's say we chose five over here for example.

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So it's going to do I equals to zero, then it's going to check if I is less than five, it's going

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to do something and it's going to do a plus plus.

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And on the next cycle I is going to be equals to one because we need plus plus.

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Then it's going to check.

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If I is less than five, then it's going to do again.

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Then it's going to do a plus plus.

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So it's going to run for certain amount of times.

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In our case, it's going to do five steps because I is equal to zero and it's going to do as long as

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I is less than 501, two, three, four.

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It's a five steps from 0 to 4.

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Let's try and do the back of the I first.

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And instead of five, I'm going to choose amount of coins here.

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Let's go back to Unity.

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And look, I'm going to set five.

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Open the console and hit play mode.

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As I said, 0 to 4.

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Now, let's try to put number one here.

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How many steps is going to do?

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That's right.

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Only one, because zero is less than one and no more.

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If you want to adjust it, you can.

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You can do if less, ie less or equals the amount of coins, for example.

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And you can start your AI not from zero, but from one.

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All right.

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So you start from one.

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And until it's less or equals the amount of coins and I'm going to choose number of steps five.

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Let's go.

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One, two, three, four, five.

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Cool.

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Right.

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Now, instead of debug line and let's set it to zero and here is backwards to less.

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So now instead of debug, we're going to do instantiate instantiate a coin.

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So let's go here and just make serialize field private game object.

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Coin prefab.

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Now, again, as I said, instead of debug, we're going to do instantiate.

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And you see here we need an object.

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So coin prefab, then we need a transformed parent.

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But actually we can put some more in for here, such as transform position, then rotation.

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And I'm going to do an identity.

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And let's skip this one for now.

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Right.

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Let's just keep this one.

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Because I want to approach a problem one by one and show a solution to you.

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Now I'm going to go to Project Prefab, choose my coin generator and drag coin over here.

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And let's say amount of coins is going to be five.

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So first what I want to fix is a.

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Where COIN was generated and I mean the parent of it, because at the moment I have five coins in the

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hierarchy and it was just one coin generator.

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But imagine I have like 50 level parts on the level and there are 50 coin generators or let's not say

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50, let's say just for one, two, three, four.

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Check this out.

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My hierarchy is a mess.

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So many coins here.

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So what I can do is assign a parent, let's do this.

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And as a parent, I'm going to assign current transform.

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Transform.

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Let's go back and check this again.

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Now it's much better.

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You see, it is pretty.

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It is inside.

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Now I'm going to delete the extra coin generators and go back.

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Now, next problem we have here is a position of the coin.

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So currently you can see that.

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When my coins are spawned, they are all at the same place.

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Check this out.

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There is one coin.

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There is another coin behind that and another one and so on.

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So what we can do is to use AI to set the offset of the coin.

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How are we going to do that?

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Basically, we're going to create vector three that I'm going to call offset.

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We shall be equals to a new vector to and for the x, I'm going to pass my eye for the Y, I'm going

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to pass zero because I don't want to change anything on the Y.

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Now let's just add this offset to transform position plus offset.

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Not.

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Check this out.

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I have my coin generator, and let's give it the gizmo so we can see it.

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Something like this?

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Yeah.

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Now, let's go to play mode.

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And we can see Cohen was bound with some offset.

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Zero one, two, three, four.

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It is good, but I want to do a bit of a change here.

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I don't want to place my first coin at the zero.

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I want them place my first coin on the left.

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So basically my coins as pound kind of in this way.

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So the amount of coins is even from the left side and right side.

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It's nothing special.

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It does not affect the gameplay at all.

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It's just something for our convenience that I want to see in the game and I want to show you how to

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do it, of course.

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So what we could do is just offset not only by I, but by amount of coins as well.

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So in the start I'm going to do additional offset is equals to amount of coins divided by two and I'm

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just going to do here I minus additional offset.

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Let's see the result, what we created here.

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And say, I'm going to put 11 coins.

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So now five coins on the left, five on the right, and one in the middle.

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Now, basically this is done, but I want to add a bit of the randomness to this one.

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So how I want to make it random, There are two options we have.

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First option is to randomize a amount of coins that will be spawned.

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And let's try to do that first.

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Just going to do serialize field private private int mean coins.

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Enter Alyse field private int max coins.

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Now we're going inside and saying that amount of coins equals to random range between mean coins and

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max coins.

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Let's go back to unity.

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And what I want to do here is to set a minimum of three coins and maximum of nine.

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Let's say Let's go and check this.

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Amount of coins.

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Seven.

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It was placed equally.

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Let's try again.

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Three.

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Four and so on.

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And I kind of like it this way, but if you want to make it in a different way, I'm going to show you

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one more option.

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We can create a chance to spawn.

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Serialize field.

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Private float.

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Chance to spawn.

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And I'm going to comment out this one just for time being.

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And inside I'm going to say bool can spawn will be true if chance to spawn is bigger than random range

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between zero and 100.

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So it's going to roll a number from 0 to 100.

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Then we're going to check if chance to spawn is bigger than that number.

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Then confound is true.

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And if it's like that then we're going to do.

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If can spawn, then instantiate back in infinity.

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I'm going to set a chance to spawn 50.

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So here it is.

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Some of the coins was found, some were not.

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But I don't really like it this way.

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You can keep any option you like.

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What I'm going to do here is I will revert it to how it was.

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I'll just delete this one and I'll delete this one.

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I'll keep minimum two maximum coins.

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I'll make it private so I cannot see it in the inspector anymore.

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And I'll delete this one.

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Now, the next step would be is to reset position to zero zero open prefab and drag it here to prefab

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folder.

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Now, whenever we want to place a coins on the level instead of placing a coin, we can place coin generator.

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And if we want to adjust it, we can just select coin generator and choose minimum coins and maximum

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coins.

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So here it will be from 10 to 50 and here is going to be from 1 to 10 is just an example.

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Yeah.

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Boom.

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So many coins we have.

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Look at this.

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So let's save it and go to next video.