A position in face coordinate space estimating the direction of the face's gaze.
This vector abstracts from the
rightEyeTransform matrices to estimate what point, relative to the face, the user's eyes are focused upon. For example:
If the user is looking to the left, the vector has a positive x-axis component.
If the user is focused on a nearby object, the vector's length is shorter.
If the user is focused on a faraway object, the vector's length is longer.
Tracking Eye Movement
A transform matrix indicating the position and orientation of the face's left eye.
A transform matrix indicating the position and orientation of the face's right eye.