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Now, in the previous lessons, we've incorporated our Pokémon card and asked our ARKit app to start
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tracking it. And once it did find it, then it triggers this method and it creates a new plane
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that is the same size as the playing card, and it renders this see-through white plane onto the card
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which we're going to be using to render our 3D Pokémon.
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Now, speaking of 3D Pokémons, we have to get hold of it.
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So in this lesson, we're going to be downloading and converting the 3D Pokémon model into a format that
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we can use in our app. In order to download the 3D Pokémon model,
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I've included a link to this web page in the course resources list which is something Root of Evil Studios
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has provided.
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So they've got a repository of all of the basic Pokémon and that you can download it in various 3D formats.
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So the one I'm looking for is, of course, the Eevee, which is interesting,
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and it's one of the Top 10 all-time downloads because, I mean, let's face it, who doesn't like Eevee?
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It's like my favorite Pokémon.
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And here, you can preview the various types of Eevees that they've got.
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You can see here that there's four different models that you can use.
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One is from Pokémon XY.
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One is just Eevee.obj.
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One is called BR_Eevee-shiny, and another one is BR_Eevee.
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So out of all of these four, I reckon this one looks the nicest, and that's the one that I want to use
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in our project.
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So you can see that they've got a status for these different models, and the two that are working quite
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well are the XY_Eevee and the Eevee.
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So when you're looking at this webpage, it's good to check out which ones should be usable and to pick
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and select, so that you minimize your level of frustration by working with a model that has missing parts.
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Let's go ahead and click download to grab hold of this Eevee model. And you should read through the Terms
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and Conditions of how you can use these models, and then agree to that notice.
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Now, once you've got that downloaded, go ahead and unzip the file, and you can see that there are a whole
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bunch of different formats for the Eevees that we've downloaded. Now, unfortunately, none of these have
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the format of DAE or the Collada format, which we spoke about previously ,that allows us to simply drag
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and drop into Xcode and start using it.
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But that's nothing to worry about.
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One of the exciting things that Apple announced as a part of ARKit 2 is their new file format for
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3D objects, and this is something that they're calling usdz files.
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And this is meant to be the new format for displaying and sharing 3D content in iOS.
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So that means I could create a 3D object in usdz and I can send that to you, and you should be able
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to view it straight away on your iPhone or your iPad without needing any other software.
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And one of the cool things is that if you have a device that is able to render in augmented reality,
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so iPhone 6 Plus and above, and you've got iOS 12 installed, if you head over to the ARKit website on
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developer.apple.com, you can actually go into the Quick Look Gallery that they provided, and you
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can simply tap on any of these objects that have the ARKit symbol next to it.
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So, for example, if we tap on this TV and we select the bar tab, then you can see that it'll render it
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into my room.
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And if you pinch, you can zoom it down to make it a little bit smaller, and you can move it around on
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the plane than it has detected, and you can rotate it or play around with it, and view these objects direct
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in your iPhone without needing any extra software or any apps to do this.
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So in this lesson, I want to show you how we can take these Pokémon models in various formats, for example,
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a very common one is .obj,
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and convert it into usdz. In order to do the conversion,
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we need to use the Xcode command line tools. If you head over to Xcode and preferences, and then you're
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going to head over to Locations.
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Now, here you have something called Command Line Tools.
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And by default, it will be set to Xcode 9.4.1 or whatever stable version Xcode
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you have installed.
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Now, if you're using a beta version of Xcode 10, you will have to go and select Xcode 10 for use in
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the Command Line Tools manually.
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Now, if you're doing this course in October 2018 or later, then you don't have to worry about this step.
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It should be selected Xcode 10 by default.
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Once you've done that, the next step is to open up Terminal. And we're going to be using Terminal to convert
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our images.
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Now, in order to use the Xcode Command Line Tools, we're going to say Xcode command-line run,
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so xcrun.
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And then, the tool that we need to use is usdz_converter, and make sure that you've not
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got any typos in here.
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And then, the next thing we do after a space is we drag in the file that we want to convert.
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So in our case, it's going to be in that folder that we downloaded and it's gonna be the one called
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Eevee.obj.
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And it should be about 143 kilobytes.
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So let's click and drag that into our Terminal to tell it
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what is the file that it should convert.
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And then, after a space, we're going to tell it where it should convert it to and how to name the converted
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file.
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So in our case, we're going to say in the root, go to users, and then go to your username, whatever it
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may be.
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Now, you can see that I'm just copying this part over here. And then, I'm gonna head over to downloads
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as well.
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Now, inside the downloads folder is where I want to save this converted file, and I'm going to simply
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call it 
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eevee.usdz.
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And now, if I hit enter, it'll go through the converting process, and there is my brand-new
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eevee.usdz file.
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So, now if I double click on it, then you can see that it opens it up in Xcode 10, and it shows me this
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3D model of Eevee which I can drag around and look at and move or change.
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And there you have it.
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You've created a USDZ model using the Xcode Command Line Tools and convert it a model from a completely
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different format to one that we can now use inside, say, your website or insight.
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In our case, ARKitt app. So have a play around with your Eevee and make sure that you keep a hold of
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this file and place it somewhere easy to access,
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for example, your desktop or your development folder. In the next lesson, we're going to be moving this
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model into our Xcode project and we're going to be rendering it in our ARSession.
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So for all of that and more,
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see you on the next lesson.