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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

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:
  1. Sensor number (int)
  2. Linear acceleration (vec3 for the float precision version, or dvec3 for the double precision version)
  3. Acceleration of orientation change (an analog of angular acceleration; quat)
  4. 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:
  1. Sensor number (int)
  2. Position (vec3 for the float precision version, or dvec3 for the double precision version)
  3. 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:
  1. Sensor number (int)
  2. Linear velocity (vec3 for the float precision version, or dvec3 for the double precision version)
  3. Velocity of orientation change (an analog of angular velocity; quat)
  4. 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
Build: ()