WorldViz PPT-E, Руководство по эксплуатации, Страница: 66 / 163

PPT User’s Manual
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Specify the maximum number of markers that PPT will try and track in your
environment.
Marker visibility
This view shows each of the markers and their visibility in the environment. Markers
failing to compute a 3D fix will display as red instead of green. If a marker value is
not visible it means that a plugin has hidden this marker. See the plugin
documentation for more information about why this would happen.
Marker data
This view shows the raw position and orientation value for each marker. A standard
PPT wireless marker will only show up with position information, but with the
addition of a post-processing plugin, markers can also contain orientation
information as well. The units shown here are in meters for position, and Euler angle
degrees for rotation.
ORIENTATION AND POSI TION PLUGINS
PPT can deliver position and orientation data to your host application through Post-
Process plugins. These plugins use combinations of magnetic/inertial orientation
sensors and/or groups of PPT markers.
You can use the
Local Offset plugin to have PPT report a locally offset position when
using PPT's orientation and position plugins. HMD users can use the Local Offset
plugin to have PPT report the location of the user's eyes rather than the PPT
marker's position which may be a considerable distance away. The Local Offset
plugin removes the false movement artifact when a HMD user pitches their head
forward and thus moves the marker.