Geometry::Point<double,3> MapTool::
getPosition()
{
Vrui::NavTrackerState nav = Vrui::getDeviceTransformation(getButtonDevice(0));
Vrui::NavTrackerState::Vector trans = nav.getTranslation();
return Geometry::Point<double,3>(trans[0], trans[1], trans[2]);
}
void UnitDragger::updateDragger(const Vrui::NavTrackerState& currentTransformation)
{
/* Calculate new transformation and increment transformation: */
DragTransform newTransform=DragTransform(currentTransformation.getTranslation(),currentTransformation.getRotation());
NCK::Rotation dr=newTransform.getRotation()*Geometry::invert(influenceSphereTransform.getRotation());
NCK::Vector dt=newTransform.getTranslation()-influenceSphereTransform.getTranslation();
/* Update dragger's current position, orientation and radius: */
influenceSphereTransform=newTransform;
influenceSphereRadius=application->influenceSphereRadius*currentTransformation.getScaling();
/* Calculate dragger's linear and angular velocities: */
linearVelocity=dt;
angularVelocity=dr.getScaledAxis();
}