Samples Guide — LeonardoXR SDK

Version: 1.0.2 Target Device: Youbiquo Leonardo XR Base SDK: Snapdragon Spaces 1.0.4

The samples are organized into two sections:

LeonardoXR Samples — samples specific to Leonardo XR’s proprietary features.
Snapdragon Spaces Core Samples — samples provided by Qualcomm for base AR/XR features.

Importing the Samples

Snapdragon Spaces Core Samples

The Core Samples package can be imported via Window > Package Manager > Snapdragon Spaces > Core Samples. After importing, add all scenes to the build through Window > XR > Snapdragon Spaces > Add Scenes to Build Settings.

LeonardoXR Core Samples

The LeonardoXR Core Samples package can be imported via Window > Package Manager > LeonardoXR > Core Samples. After importing, the scenes are available in the Samples/LeonardoXR/[version]/Core Samples/Scenes/ folder.

LeonardoXR Samples

Dual Camera Access Sample

⚠️ Documentation in preparation.

This sample demonstrates how to access synchronized frames from Leonardo XR’s dual cameras using the Dual Camera Access feature.

Scene: Samples/LeonardoXR/.../Core Samples/Scenes/DualCameraAccess Prerequisites: The Dual Camera Access feature enabled in the LeonardoXR feature group.

QNN Inference Sample

⚠️ Documentation in preparation.

This sample demonstrates how to load and run a neural inference model on Leonardo XR’s NPU using the QNN Inference Plugin.

Scene: Samples/LeonardoXR/.../Core Samples/Scenes/QnnInference Prerequisites: The QNN Inference Plugin feature enabled in the LeonardoXR feature group.

Intercept OpenXR Function Sample

⚠️ Documentation in preparation.

This sample demonstrates how to intercept low-level OpenXR functions using the InterceptOpenXRFunction feature.

Scene: Samples/LeonardoXR/.../Core Samples/Scenes/InterceptOpenXRFunction Prerequisites: The Intercept OpenXR Function feature enabled in the LeonardoXR feature group.

Snapdragon Spaces Core Samples

Local Anchors Sample

Scene: Samples/Snapdragon Spaces/.../Core Samples/Scenes/Anchor

This sample demonstrates how to create and destroy local anchors to precisely track a point in the real world. It requires the Spatial Anchors feature enabled in OpenXR.

How It Works

A transparent positioning gizmo floats 1 meter in front of the camera. When Place anchor on surfaces is enabled, a ray is cast forward every frame. When a surface is hit, the gizmo turns yellow. Tapping the touchpad or using the gaze interactor creates an ARAnchor with a tracking gizmo.

private void OnAnchorsChanged(ARAnchorsChangedEventArgs args)
{
    foreach (var anchor in args.updated)
    {
        Destroy(anchor.transform.GetChild(0).gameObject);
        var newGizmo = Instantiate(
            anchor.trackingState == TrackingState.None
                ? GizmoUntrackedAnchor
                : GizmoTrackedAnchor);
        newGizmo.transform.SetParent(anchor.transform, false);
    }
}

Saving, Deleting, and Loading Anchors

Enable Save new anchors to local store to persist each new anchor.
A white cube on the gizmo = saved and tracked anchor; red cube = not tracked.
Load All Saved Anchors — loads and attempts to locate all stored anchors.
Clear Store — deletes all stored anchors (does not destroy anchors already loaded).
Destroy All Anchors — destroys all active anchor GameObjects (with a short delay).

Hand Tracking Sample

Scene: Samples/Snapdragon Spaces/.../Core Samples/Scenes/HandTracking

Demonstrates hand joint visualization and gesture recognition using the QCHT interaction package. Requires the Hand Tracking feature and the QCHT / XR Hands packages.

Hit Testing Sample

Scene: Samples/Snapdragon Spaces/.../Core Samples/Scenes/HitTesting

Demonstrates continuous hit testing via raycasting against real-world planes and meshes using ARRaycastManager. The sample shows how to place virtual objects on detected surfaces.

Image Tracking Sample

Scene: Samples/Snapdragon Spaces/.../Core Samples/Scenes/ImageTracking

Demonstrates tracking of printed reference images and overlaying virtual content. Supports static and mutable image libraries.

Plane Detection Sample

Scene: Samples/Snapdragon Spaces/.../Core Samples/Scenes/PlaneDetection

Demonstrates the detection and visualization of horizontal and vertical planes using ARPlaneManager. Supports optional detection modes and convex hull planes.

Camera Frame Access Sample

Scene: Samples/Snapdragon Spaces/.../Core Samples/Scenes/CameraFrameAccess

Demonstrates the retrieval of raw camera frames (YUV / YUYV) from the device using ARCameraManager. Includes sensor extrinsics, camera count queries, and GPU-accelerated frame access.

Important: Requires Allow ‘unsafe’ Code enabled in Player Settings.

Spatial Meshing Sample

Scene: Samples/Snapdragon Spaces/.../Core Samples/Scenes/SpatialMeshing

Demonstrates real-time environmental meshing using ARMeshManager. Includes an opacity slider and the optional SpacesARMeshManagerConfig component.

QR Code Tracking Sample

Scene: Samples/Snapdragon Spaces/.../Core Samples/Scenes/QRCodeTracking

Demonstrates QR code scanning and tracking via SpacesQrCodeManager. Multiple tracking modes are available.

XR Interaction Toolkit Sample

Scene: Samples/Snapdragon Spaces/.../Core Samples/Scenes/XRInteractionToolkit

Demonstrates standard XR Interaction Toolkit interactions (ray interactors, direct interactors, teleportation) in a Snapdragon Spaces project. Compatible with LeonardoXR configuration.

Interaction Components

Composition Layer Components

The Spaces Composition Layer renders textures directly to the HMD, bypassing post-processing steps. Supported geometry types are Quad, Cylinder, Sphere, and Cube. Useful for high-resolution UI or elements that must maintain quality regardless of scene effects.

Additional Samples

Sample	Description
Display Refresh Rate	Runtime querying and setting of the display refresh rate via the `XR_EXT_display_refresh_rate` extension.
Performance Settings	Setting CPU/GPU performance levels via the `XR_EXT_performance_settings` extension.