bool DraggerVolumeTileCallback::receive(const osgManipulator::MotionCommand &command)
{
if (!_locator)
return false;
switch (command.getStage())
{
case osgManipulator::MotionCommand::START:
{
// Save the current matrix
_startMotionMatrix = _locator->getTransform();
// Get the LocalToWorld and WorldToLocal matrix for this node.
osg::NodePath nodePathToRoot;
osgManipulator::computeNodePathToRoot(*_volume, nodePathToRoot);
_localToWorld = _startMotionMatrix * osg::computeLocalToWorld(nodePathToRoot);
_worldToLocal = osg::Matrix::inverse(_localToWorld);
return true;
}
case osgManipulator::MotionCommand::MOVE:
{
// Transform the command's motion matrix into local motion matrix.
osg::Matrix localMotionMatrix = _localToWorld * command.getWorldToLocal()
* command.getMotionMatrix()
* command.getLocalToWorld() * _worldToLocal;
// Transform by the localMotionMatrix
_locator->setTransform(localMotionMatrix * _startMotionMatrix);
// osg::notify(osg::NOTICE)<<"New locator matrix "<<_locator->getTransform()<<std::endl;
return true;
}
case osgManipulator::MotionCommand::FINISH:
{
return true;
}
case osgManipulator::MotionCommand::NONE:
default:
return false;
}
}
