rotationMatrix property

Full device attitude as a row-major 3x3 rotation matrix mapping a world vector (East, North, Up — true north) to screen coordinates (x to the right of the screen, y to its top, z out of the screen towards the viewer), for the current UI orientation.

Unlike heading/pitch it also carries the roll and has no singularity when tilting the device. When null (e.g. custom ArSensorSource), it is rebuilt from heading and pitch with no roll.