How to Programmatically Place Objects in Augmented Reality312

Augmented reality (AR) is a technology that superimposes a computer-generated image on a user's view of the real world, thus providing a composite view. AR is gaining popularity in various fields, including gaming, education, and retail. One of the key features of AR is the ability to place virtual objects in the real world. This can be done programmatically using an AR software development kit (SDK).

In this tutorial, we will learn how to programmatically place an object in AR using the ARKit framework. ARKit is a framework provided by Apple for developing AR applications on iOS devices. We will be using Xcode to create an ARKit application and Swift as the programming language.## Prerequisites
* A Mac computer with Xcode installed
* An iPhone or iPad with iOS 11 or later
* Basic knowledge of Swift programming language
## Creating a New ARKit Project
1. Open Xcode and create a new project.
2. Select the "Augmented Reality App" template.
3. Enter a name for your project and click "Create".
## Adding an Object to the Scene
1. In the Xcode project navigator, select the "" file.
2. Drag and drop a 3D object file (e.g., .obj, .dae) into the "" file.
3. Select the object file and click on the "Show in Finder" button.
4. In the Finder window, right-click on the object file and select "Copy".
5. Go back to Xcode and paste the object file into the "" file.
## Placing the Object in the Scene
1. In the Xcode project navigator, select the "" file.
2. Add the following code to the `viewDidLoad()` method:
```swift
import ARKit
class ViewController: UIViewController, ARSCNViewDelegate {
let sceneView = ARSCNView()
override func viewDidLoad() {
()
// Create a new scene
let scene = SCNScene()
// Create a new object
let object = SCNNode()
= SCNBox(width: 0.1, height: 0.1, length: 0.1)
= SCNVector3(0, 0, -0.5)
// Add the object to the scene
(object)
// Set the scene to the scene view
= scene
// Add the scene view to the view controller's view
(sceneView)
// Set the delegate of the scene view
= self
}
// MARK: - ARSCNViewDelegate Methods
func renderer(_ renderer: SCNSceneRenderer, nodeFor anchor: ARAnchor) -> SCNNode? {
// Only create a node for an anchor if it is a plane anchor
guard anchor is ARPlaneAnchor else { return nil }
// Create a new object
let object = SCNNode()
= SCNBox(width: 0.1, height: 0.1, length: 0.1)
// Place the object on the plane anchor
=
return object
}
}
```
## Running the Application
1. Connect your iPhone or iPad to your Mac.
2. Click on the "Run" button in Xcode.
3. The application will be installed on your device and launched automatically.
## Conclusion
In this tutorial, we learned how to programmatically place an object in AR using the ARKit framework. We created a simple AR application that places a virtual box on a detected plane surface. You can use this knowledge to create more complex AR applications that place virtual objects in the real world.