Raycasts sample

The Raycasts sample demonstrates AR Foundation Raycasts. This scene enables AR Foundation Point cloud visualization and Plane detection to provide surfaces for ray casting. You can open this sample in Unity from the Assets/Scenes/Raycasts folder.

Tip

AR Foundation samples are supported on platforms that support the demonstrated feature. To check whether a feature is supported on your chosen platform, refer to the Platform support table and the documentation for that feature.

Raycasts scene

This scene provides on-screen buttons to let you pause, resume, reset, and reload the AR Session.

When a plane is detected, you can tap on the detected plane to place a cube on it. This uses the ARRaycastManager to perform a ray cast against the plane. If the plane is in TrackingState.Limited, it will highlight red. On ARCore, this means that ray casting will not be available until the plane is in TrackingState.Tracking again.

The following table describes the available actions in this scene:

Action	Definition
Pause	Pauses the ARSession, meaning device tracking and trackable detection (for example plane detection) is temporarily paused. While paused, the ARSession doesn't consume CPU resources.
Resume	Resumes a paused ARSession. The device will attempt to relocalize and previously detected objects might shift around as tracking is reestablished.
Reset	Clears all detected trackables and effectively begins a new ARSession.
Reload	Completely destroys the ARSession GameObject and re-instantiates it. This simulates the behavior you might experience during scene switching.