Class

ARWorldTrackingConfiguration

A configuration that uses the rear-facing camera, tracks a device's orientation and position, and detects real-world flat surfaces.

Overview

All AR configurations establish a correspondence between the real world the device inhabits and a virtual 3D coordinate space where you can model content. When your app displays that content together with a live camera image, the user experiences the illusion that your virtual content is part of the real world.

Creating and maintaining this correspondence between spaces requires tracking the device's motion. The ARWorldTrackingConfiguration class tracks the device's movement with six degrees of freedom (6DOF): specifically, the three rotation axes (roll, pitch, and yaw), and three translation axes (movement in x, y, and z).

This kind of tracking can create immersive AR experiences: A virtual object can appear to stay in the same place relative to the real world, even as the user tilts the device to look above or below the object, or moves the device around to see the object's sides and back.

Figure 1

6DOF tracking maintains an AR illusion regardless of device rotation or movement

If you enable the planeDetection setting, ARKit analyzes the scene to find real-world flat surfaces. For each plane detected, ARKit automatically adds an ARPlaneAnchor object to the session.

Topics

Creating a Configuration

init()

Creates a new world tracking configuration.

Configuring a Session

var planeDetection: ARWorldTrackingConfiguration.PlaneDetection

A value specifying whether and how the session attempts to automatically detect flat surfaces in the camera-captured image.

struct ARWorldTrackingConfiguration.PlaneDetection

Options for whether and how ARKit detects flat surfaces in captured images.

Relationships

Inherits From

Conforms To

See Also

World-Based AR Experiences

Building Your First AR Experience

Create an app that runs an AR session and uses plane detection to place 3D content using SceneKit.

Handling 3D Interaction and UI Controls in Augmented Reality

Follow best practices for visual feedback, gesture interactions, and realistic rendering in AR experiences.

class AROrientationTrackingConfiguration

A configuration that uses the rear-facing camera and tracks only a device's orientation.

class ARPlaneAnchor

Information about the position and orientation of a real-world flat surface detected in a world-tracking AR session.