Class SoTrackerEvent

  • public class SoTrackerEvent
    extends SoEvent
    3D tracker event. SoTrackerEvent represents 3D position and orientation events in the Open Inventor event model.

    A "tracker" is any device whose position and orientation are dynamically tracked in 3D, typically for immersive VR applications. For example: a head tracker. A "controller" is an input device which typically has buttons and/or valuators (e.g. a joystick). Many controllers have an associated tracker. For example, the commonly used "wand" input device has three buttons, a two-axis joystick (two valuators), and an associated tracker.

    The virtual method SoEvent.getTrackerInfo() can be used to determine if an event object has associated tracker information. Traditional 2D events like SoMouseButtonEvent and SoLocation2Event return NULL. 3D events like SoTrackerEvent and SoControllerButtonEvent return their associated tracker information (SbTrackerInfo).

    Many tracker devices generate a continuous stream of position and orientation reports, so strictly speaking there are no "events." Generally Open Inventor classes that recognize the SoTrackerEvent interpret it as notification of a "significant" change in the tracker position and/or orientation. Processing of SoTrackerEvents may be relatively expensive. For example, a pick operation will usually be done automatically. The application (or other software above Open Inventor) is responsible for deciding when to actually create an SoTrackerEvent.

    See Also:
    SoControllerButtonEvent, SoEvent, SbTrackerInfo
    • Constructor Detail

      • SoTrackerEvent

        public SoTrackerEvent()
    • Method Detail

      • setOrientation

        public void setOrientation​(float x,
                                   float y,
                                   float z)
        Set orientation value of associated tracker from Euler angles in radians (using the trackd convention Z*X*Y).
      • setOrientation

        public void setOrientation​(SbVec3f axis,
                                   float angle)
        Set orientation value of associated tracker from axis and angle in radians.
      • getPosition3

        public SbVec3f getPosition3()
        Get position of associated tracker in world coordinates.
      • setOrientation

        public void setOrientation​(SbRotation orientation)
        Set orientation value of associated tracker from an SbRotation.
      • setPosition3

        public void setPosition3​(SbVec3f p)
        Set position of associated tracker in world coordinates.
      • getRay

        public SbLine getRay()
        Get a ray for picking/intersecting. This is a convenience function.
      • getOrientation

        public SbRotation getOrientation()
        Get orientation of associated tracker as a standard Open Inventor rotation (quaternion).