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The VRML97 Standard does not provide a Sensor node that allows
for moving an object in all three dimensions. The scene shown here
demonstrates how one can combine multiple PlaneSensors
to move an object in all three directions. There is a forth PlaneSensor
in the object itself and this one is located inside a Billboard, thus
moving the object always in the plane of the screen.
Another aproach
ist the SpaceSensor Proto by
Jörg Scheurich, which adds visual cues for the planes when the object is clicked.
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