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Come back again this lesson is actually going to make things a lot more exciting in the sense that we'll

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end up randomizing the tiles.

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So what we have here which is currently a group of toys that they're in or they're from 007 and again

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from 0 7 will end up being randomized all over the place.

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So let's go ahead and see how I'm going to do that.

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I'm going to go ahead to my viewpoint for that and I'm actually going to go ahead and add a new function

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and this function when I call it the randomize function and then randomize function.

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Here are the things that we have to do based on the comments I had earlier.

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These are taking care of.

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We already have all the tiles and centers these two of you still have to do some way to type them in

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here.

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Let me get myself a little bit more space so we can only focus on one thing at a time.

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And this is the randomise function.

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So we have to go to all times and that if you remember it would be as simple as doing for any title

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in let's call it in tilers array.

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So we call that any trial in tiles array.

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Here are the things that they want to happen.

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I want to find a random center and assign it to any tile.

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So here's the first thing I have to do.

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I have to say any tile dot center that has to become a random place.

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So finding that the random center means we have to find a random ID from day centers.

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So I have to essentially go ahead and say let's put this one in a new body but I'm going to call this

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one.

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Let random center that is going to be centers array and from that I have to find a random location.

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So let's go ahead and do that.

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I know I'm getting a lot of arrows.

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It's just because I'm going one step by the time and I'm kind of reverse engineering going back from

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one step at a time.

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So I'm going to go ahead and say let's I'm going to call this one random index the random index has

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to be a random index from the center array and that's going to be an integer value and that integer

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value I have to use an arc for random uniform to get that number that I want and there's going to be

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a bit of a longer code.

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But bear with me to see how we get there because a lot of it actually depends on ex-coach to be fixed

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for me.

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So what I need is an arc for Rondeaux uniform and the upper bound that I want to give it is the center

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is array dot count.

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So I want to produce a random number to a maximum of centers or a count which doesn't include the maximum

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itself so it is going to produce between 0 2 that's maximal.

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In this case being 15.

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So I get zero to 15 which are the numbers that I want now is giving me an error saying that the value

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or entering in here is not a U.

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Instead if two and I have to actually fix now then I'm going to say well convert that replace it with

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you in thirty two and that's all well but now that's going to give me another error saying that well

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Orlick Fernando doesn't produce integers by default.

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Are you sure you want to use this like that or do you want to convert it to an integer.

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And I'm going to say I'm get to this part manually saying eans of that value.

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So we get this.

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Those are eight counts.

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We produce a random number from it.

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That's going to be on you in 30 to and from that you entered it to get the integer value we convert

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into an integer because there are convertible to each other and then I'm going to say the random index

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is the index from centers array that they want to find a new center from data center is the center I

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want to apply to my type.

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And that's all we have to do.

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Of course there is still a few things but they want to show you what happens now and then fix those

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things.

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So if we call the randomized now in our view a lot after making the tiles we should get at least some

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randomization.

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Let's go ahead and see if that's actually going to work.

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Let me clean the code so we can see everything together just in case you want to catch up with me.

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So that's the code they have so far.

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And using the randomized interview did a lot.

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And if I run my hour right now I loaded it in my simulator we should be able to make all the ties and

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go to randomize and randomize them in here.

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And it's kind of happening but there are some spots that nothing is shown in them and actually want

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you to think for a second why this is happening.

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But if you want you can actually pause the video for a site and look at my code and try to think to

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yourself why this is happening.

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I'm going to pause for just a second.

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In case you want to pause the video as well.

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So the reason it is happening is this Every time I go to this function I find the random index does

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random index is a location somewhere in the center's array and it is very very possible that they get

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the same space twice.

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It's possible that this location being the index one I've gotten it more than once and there actually

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too tired as in years sitting on top of each other.

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I just don't see most of them.

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I see another one.

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So to fix that I'm going to have to make sure that every time they use a center or any of the centers

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that they have used I have to take it out of the sensors array.

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This way I make sure that nobody can be used more than once.

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So let's go ahead and do that.

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I'm going to say random index find.

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That's where you'll use it in the centers array applied to my tile and then say sensors array dot remove

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at random index right index.

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And this is going to make sure that we remove every one that we used up from the centers right now.

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I want to show you that I'm just going to explain it to you because I know that's going to make sense

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to you guys.

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The problem with trying to right now is simply this if you decide somebody in the middle of the game

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to reset the game using this by then and if you try to rerun this function is going to crash your application

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simply because centers are a will not have anything in it anymore centers.

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It would actually be zeroed out because once you run this function just once it goes through every member

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of the Interior's array and removes them one at a time and as a result you won't have anything left

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in here so you can reset your game.

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Now there are two ways of thinking about it.

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One is features a more common way.

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Let's make a temporary Center's array so we don't touch the regional centers OK every time we want to

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randomize.

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We make a duplicate of it.

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So that's one way of thinking about it the other way of thinking about is let's remake the tiles every

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time that you want to reset.

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Now by the end of the game or by the end of this development I'm going to settle for the second solution.

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But for now I want to show you how we would do it if you wanted to make it temporary centers.

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All right.

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So to do that I would go in here and simply say let's call it Tim sands array and that's going to be

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the center's Arri and that's all we have to do.

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So we have a temporary version of it that original one is there and I'm going to use the temporary version

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for everything in here.

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So I use a temporary version to find a random index.

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I use the temporary one to locate something and I use the temporary one to remove the random index object

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from it.

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Once we do this every time that this function is called a new temporary one is created is used up in

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here.

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Everything in it is going to be finished.

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We're going to go through zero to 15.

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Or if you're playing the game in a six by six mode 0.35 you're going to go through all of them.

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And once they are done that whole object is going to be deallocated.

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So that's really going to help me in this situation.

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Of course we won't be able to see almost anything happening here visually but that's kind of something

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that you can see from the code is happening.

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It is randomising it 7 0 4 6 are no pattern between them and now we have a game that can be reset once

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we programmed the reset button.

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Let's keep it up to here and we'll move on to our next class.