ARKit Assignment 3

Detecting and Rendering Planes and Placing Objects

Please conduct the following tasks. For implementation details you can refer to the lecture slides or the Apple ARKit documentation website. Please do not hesitate to ask me if you have any questions. Under „Tip“ you can find some hints for the task. The „Checklist“ specifies what should happen when your implementation is correct.

Tasks

1. Detecting Planes in the AR Session and Plane rendering
2. Placing Object on a Plane based on user touches

1. Detecting Planes in the AR Session and Plane rendering

In this assignment, please start with an empty app based on the “Single View App” template. After creating the app, add a ARSCNView as the only view to your ViewController in the Main.storyboard.

The result should look something like this:

Implementing the plane detection

Next, conduct the following steps and implement the plane detection and rendering of planes in the scene. Use the ARKit introduction slides for reference and code examples.

• Import ARKit in your ViewController
• Add NSCameraUsageDescription field to Info.plist in order to get access to the camera
• Configure the ARSCNView to detect planes using the ARWorldTrackingConfiguration
• Implement the ARSCNViewDelegate protocol an set your ViewController as delegate to the ARSCNView
• In the callback render a detected plane in the AR scene

Checklist	Check?
The app runs showing detected planes.	☑️

2. Placing Object on a Plane based on user touches

In order to detect touches you can override the method:

touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?)

Within that method use the hitTest() method of the ARSCNView to get the location where the user touched a plane. Create a new SCNnode and position it on that location. You can either model your own 3D model in the Scene editor or load an existing model from a USDZ file.

The result should look something like this:

Checklist	Check?
The AR models can be added to the scene when touching a detected plane	☑️