/// <summary>
/// Takes in a spatial node id and returns the transformation matrix that specifies the transformation from the spatial node to the Unity world.
/// </summary>
/// <param name="nodeId">Id of the spatial node.</param>
/// <param name="runOnDevice">True if the application is running on a hololens device</param>
/// <returns>Transformation matrix from the spatial node to the Unity world.</returns>
public static System.Numerics.Matrix4x4?GetSceneToUnityTransform(Guid nodeId, bool runOnDevice)
{
System.Numerics.Matrix4x4?sceneToUnityTransform = System.Numerics.Matrix4x4.Identity;
#if WINDOWS_UWP
// Only get the spatial coordinate if we are running on device
if (runOnDevice)
{
Debug.Log("TransformUtils.GetSceneToUnityTransform: About to create a coordinate system for node id: " + nodeId);
SpatialCoordinateSystem sceneSpatialCoordinateSystem = Windows.Perception.Spatial.Preview.SpatialGraphInteropPreview.CreateCoordinateSystemForNode(nodeId);
SpatialCoordinateSystem unitySpatialCoordinateSystem = (SpatialCoordinateSystem)System.Runtime.InteropServices.Marshal.GetObjectForIUnknown(
UnityEngine.XR.WSA.WorldManager.GetNativeISpatialCoordinateSystemPtr());
sceneToUnityTransform = sceneSpatialCoordinateSystem.TryGetTransformTo(unitySpatialCoordinateSystem);
if (sceneToUnityTransform != null)
{
sceneToUnityTransform = TransformUtils.ConvertRightHandedMatrix4x4ToLeftHanded(sceneToUnityTransform.Value);
}
else
{
Debug.LogWarning("TransformUtils.GetSceneToUnityTransform: Scene to Unity transform is null. Not good.");
}
}
#endif
return(sceneToUnityTransform);
}
