6 modules - PI-VR GmbH

6 MODULES6.3.7 TrackingInteraction » TrackingThe tracking module is responsible for connecting an external tracking system to VREDby communicating to one or more VRPN (Virtual Reality Peripheral Network) servers.VRPN is an open source standard library for accessing many different tracking systemswith a unified approach.» Devices The first and most important tab of the tracking module within VRED isdedicated to the tracking devices and their sensors.Each tracking device represents a complete tracking system consisting of a trackingspace, a coordinate system and one or more sensors.This tab allows you to define VPRN devices. VRPN provides the connectionsupport between the application and all kinds of devices using the appropriateclass-of-service for each type of device sharing this link. These devices may betracker, button devices, haptic devices, analog inputs or sound. Right click in thewindow to see the submenu:174» Add device: Adds a new VRPN device. Type in a resource in URI notation.» Remove device: Removes the selected VRPN device.» Reset device: Resets the selected device to its initial state.» Edit calibration: Edits the calibration matrix of the selected device. The calibrationmatrix is a measurement mapping of the real space to the virtual space. Thefollowing options appear:• Clear Translations: Clears any translation (offset) in the matrix.• Matrix Transformation mode:· Reset: Resets the matrix to its initial state.· Z-Up to Y-Up: Retransforms the matrix so that the up-vector is nowrepresented by the y axis.· Y-Up to Z-Up: Retransforms the matrix so that the up-vector is nowrepresented by the z axis.