VrpnTrackerDevice Class

List of functions:

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.

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: 2017-10-20

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VrpnTrackerDevice Class

List of functions:

See Also