Class for representing 3D tracker information. More...
#include <Inventor/events/SbTrackerInfo.h>
Public Member Functions | |
SbTrackerInfo () | |
~SbTrackerInfo () | |
void | setPosition3 (const SbVec3f &p) |
const SbVec3f & | getPosition3 () const |
const SbRotation & | getOrientation () const |
void | getOrientation (SbVec3f &axis, float &angle) const |
void | setOrientation (float q0, float q1, float q2, float q3) |
void | setOrientation (const float q[4]) |
void | setOrientation (const SbVec3f &axis, float angle) |
void | setOrientation (SbRotation orientation) |
void | setOrientation (float xangle, float yangle, float zangle) |
const SbLine | getRay () const |
void | setData (void *appData) |
const void * | getData () const |
An object that stores information about the state of a 3D tracker device, specifically position and orientation.
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 a pointer to their associated tracker information (SbTrackerInfo).
In addition to the usual methods for setting an orientation, this class provides a method that takes three Euler angles specified in radians. This allows orientation information returned by the widely used trackd API to be stored directly into an Open Inventor event object.
Tracker info is most often used by Open Inventor classes to specify a direction for picking or intersection with a dragger. This class provides the getRay() method to conveniently get an SbLine defining the direction the tracker is pointing.
This class also provides a void * data member that could be used, for example, to distinguish different tracker devices or communicate any other information between an application and custom nodes in the scene graph. Open Inventor does not set or use this variable.
SoControllerButtonEvent, SoEvent, SoTrackerEvent
SbTrackerInfo::SbTrackerInfo | ( | ) |
Constructor.
SbTrackerInfo::~SbTrackerInfo | ( | ) |
Destructor.
const void* SbTrackerInfo::getData | ( | ) | const [inline] |
Get application data.
void SbTrackerInfo::getOrientation | ( | SbVec3f & | axis, | |
float & | angle | |||
) | const [inline] |
Get orientation of tracker.
Return value as axis and angle.
const SbRotation& SbTrackerInfo::getOrientation | ( | ) | const [inline] |
Get orientation of tracker as a standard Open Inventor rotation (quaternion).
const SbVec3f& SbTrackerInfo::getPosition3 | ( | ) | const [inline] |
Get position of tracker in world coordinates.
const SbLine SbTrackerInfo::getRay | ( | ) | const |
Convenience function to get ray for picking/intersecting.
void SbTrackerInfo::setData | ( | void * | appData | ) | [inline] |
Set application data.
void SbTrackerInfo::setOrientation | ( | float | xangle, | |
float | yangle, | |||
float | zangle | |||
) |
Set orientation value from Euler angles in radians (using the trackd convention Z*X*Y).
void SbTrackerInfo::setOrientation | ( | SbRotation | orientation | ) | [inline] |
Set orientation value from an SbRotation.
void SbTrackerInfo::setOrientation | ( | const SbVec3f & | axis, | |
float | angle | |||
) | [inline] |
Set orientation value from axis and angle in radians.
void SbTrackerInfo::setOrientation | ( | const float | q[4] | ) | [inline] |
Set orientation value from array of 4 floats defining the rotation quaternion.
void SbTrackerInfo::setOrientation | ( | float | q0, | |
float | q1, | |||
float | q2, | |||
float | q3 | |||
) | [inline] |
Set orientation value from 4 floats defining the rotation quaternion.
void SbTrackerInfo::setPosition3 | ( | const SbVec3f & | p | ) | [inline] |
Set position of tracker in world coordinates.