VrpnTrackerDevice Class
A class for the VRPN plugin add-on that allows receiving data about position, orientation, velocity and acceleration of tracked objects from 3D tracking sensors.
See Also
- Article on VRPN Plugin Add-On
VrpnTrackerDevice Class
Members
void setAccelerationCallback(string name)
Sets the world script callback function lang="usc" that receives data about acceleration of tracked objects.Arguments
- string name - Callback function lang="usc" name.
Examples
Source code (UnigineScript)
VrpnTrackerDevice vrpn_tracker;
int init() {
vrpn_tracker = new VrpnTrackerDevice("device_name@server_addr");
vrpn_tracker.setAccelerationCallback("acceleration_callback");
return 1;
}
int shutdown() {
delete vrpn_tracker;
return 1;
}
int update() {
vrpn_tracker.update();
return 1;
}
// a callback function
void acceleration_callback(int sensor,vec3 acceleration,quat orientation,float ifps) {
log.message("Device sensor %d: acceleration %s, orientation %s, ifps %f\n",sensor,acceleration,orientation,ifps);
}string getAccelerationCallback()
Returns a name of the world script callback function lang="usc" that receives data about acceleration of tracked objects. The callback function lang="usc" should be defined in the world script and receive 4 arguments:- Sensor number (int)
- Linear acceleration (vec3 for the float precision version, or dvec3 for the double precision version)
- Acceleration of orientation change (an analog of angular acceleration; quat)
- Acceleration measurement time (float for the float precision version, or double for the double precision version)
Source code (UnigineScript)
// float precision
void callback_func(int sensor,vec3 acceleration,quat acceleration_orientation,float ifps) {
// function lang="usc" logic
}
// double precision
void callback_func(int sensor,dvec3 acceleration,quat acceleration_orientation,double ifps) {
// function lang="usc" logic
}Return value
Callback function lang="usc" name.void setTransformCallback(string name)
Sets the world script callback function lang="usc" that receives data about position and orientation of tracked objects.Arguments
- string name - Callback function lang="usc" name.
Examples
Source code (UnigineScript)
VrpnTrackerDevice vrpn_tracker;
int init() {
vrpn_tracker = new VrpnTrackerDevice("device_name@server_addr");
vrpn_tracker.setTransformCallback("transform_callback");
return 1;
}
int shutdown() {
delete vrpn_tracker;
return 1;
}
int update() {
vrpn_tracker.update();
return 1;
}
// a callback function
void transform_callback(int sensor,vec3 position,quat orientation) {
log.message("Device sensor %d: position %s, orientation %s\n",sensor,position,orientation);
}string getTransformCallback()
Returns a name of the world script callback function lang="usc" that receives data about position and orientation of tracked objects. The callback function lang="usc" should be defined in the world script and receive 3 arguments:- Sensor number (int)
- Position (vec3 for the float precision version, or dvec3 for the double precision version)
- Orientation (quat)
Source code (UnigineScript)
// float precision
void callback_func(int sensor,vec3 acceleration,quat acceleration_orientation,float ifps) {
// function lang="usc" logic
}
// double precision
void callback_func(int sensor,dvec3 acceleration,quat acceleration_orientation,double ifps) {
// function lang="usc" logic
}Return value
Callback function lang="usc" name.void setVelocityCallback(string name)
Sets the world script callback function lang="usc" that receives data about velocity of tracked objects.Arguments
- string name - Callback function lang="usc" name.
Examples
Source code (UnigineScript)
VrpnTrackerDevice vrpn_tracker;
int init() {
vrpn_tracker = new VrpnTrackerDevice("device_name@server_addr");
vrpn_tracker.setVelocityCallback("velocity_callback");
return 1;
}
int shutdown() {
delete vrpn_tracker;
return 1;
}
int update() {
vrpn_tracker.update();
return 1;
}
// a callback function
void velocity_callback(int sensor,vec3 velocity,quat orientation,float velocity_ifps) {
log.message("Device sensor %d: velocity %s, orientation %s, ifps %f\n",sensor,velocity,orientation,ifps);
}string getVelocityCallback()
Returns a name of the world script callback function lang="usc" that receives data about velocity of tracked objects. The callback function lang="usc" should be defined in the world script and receive 4 arguments:- Sensor number (int)
- Linear velocity (vec3 for the float precision version, or dvec3 for the double precision version)
- Velocity of orientation change (an analog of angular velocity; quat)
- Velocity measurement time (float for the float precision version, or double for the double precision version)
Source code (UnigineScript)
// float precision
void callback_func(int sensor,vec3 velocity,quat velocity_orientation,float ifps) {
// function lang="usc" logic
}
// double precision
void callback_func(int sensor,dvec3 velocity,quat velocity_orientation,double ifps) {
// function lang="usc" logic
}Return value
Callback function lang="usc" name.void update()
Updates the internal state of the device and receives input data.Notice
This function lang="usc" should be called each frame.
VrpnTrackerDevice(string name)
Constructor.Arguments
- string name - Path to the device in the format device_name@server_address.
Last update: 10.08.2018
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