ARDirectionalLightEstimate
Estimated environmental lighting information associated with a captured video frame in a face-tracking AR session.
Declaration
class ARDirectionalLightEstimateOverview
When you run a face tracking AR session (see ARFaceTrackingConfiguration) with the isLightEstimationEnabled property set to true, ARKit uses the detected face as a light probe to estimate the directional lighting environment in the scene. The lightEstimate property of each frame vended by the session contains an ARDirectionalLightEstimate instance containing this information.
If you render your own overlay graphics for the AR scene, you can use this information in shading algorithms to help make those graphics match the real-world lighting conditions of the scene captured by the camera. (The ARSCNView class automatically uses this information to configure SceneKit lighting.)