FGFS-4.1/OpenSceneGraph
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Refactored the event handler so that it contains a helper NodeVistor class rather than inherits from inappropriately using multiple inheritance.

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This commit is contained in:
Robert Osfield 2018-02-07 17:23:14 +00:00
parent 18721039c5
commit 54ccde5d02
1 changed files with 54 additions and 40 deletions
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94
examples/osgsidebyside/osgsidebyside.cpp
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@ -41,43 +41,14 @@ using namespace osg;
using namespace osgGA;
class SwitchDOFVisitor : public osg::NodeVisitor, public osgGA::GUIEventHandler
class SwitchDOFHandler : public osgGA::GUIEventHandler
{
public:
SwitchDOFVisitor():
osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN)
SwitchDOFHandler()
{
}
SwitchDOFVisitor(const SwitchDOFVisitor& sdfv, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY) {}
META_Object(osg, SwitchDOFVisitor)
virtual void apply(Group& node)
{
osgSim::MultiSwitch* pMSwitch = dynamic_cast<osgSim::MultiSwitch*>(&node);
if (pMSwitch)
{
mSwitches.push_back(pMSwitch);
}
osg::NodeVisitor::apply(node);
}
virtual void apply(Transform& node)
{
osgSim::DOFTransform* pDof = dynamic_cast<osgSim::DOFTransform*>(&node);
if (pDof)
{
mDofs.push_back(pDof);
pDof->setAnimationOn(true);
}
osg::NodeVisitor::apply(node);
}
void nextSwitch()
{
for (size_t i=0; i < mSwitches.size(); i++)
@ -151,9 +122,53 @@ public:
return false;
}
void collectNodesOfInterest(osg::Node* node)
{
CollectNodes cn(this);
node->accept(cn);
}
private:
std::vector<osgSim::MultiSwitch*> mSwitches;
std::vector<osgSim::DOFTransform*> mDofs;
friend class CollectNodes;
class CollectNodes : public osg::NodeVisitor
{
public:
SwitchDOFHandler* _parent;
CollectNodes(SwitchDOFHandler* parent):
osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
_parent(parent)
{
}
virtual void apply(Group& node)
{
osgSim::MultiSwitch* pMSwitch = dynamic_cast<osgSim::MultiSwitch*>(&node);
if (pMSwitch)
{
_parent->mSwitches.push_back(pMSwitch);
}
traverse(node);
}
virtual void apply(Transform& node)
{
osgSim::DOFTransform* pDof = dynamic_cast<osgSim::DOFTransform*>(&node);
if (pDof)
{
_parent->mDofs.push_back(pDof);
pDof->setAnimationOn(true);
}
traverse(node);
}
};
std::vector< osg::ref_ptr<osgSim::MultiSwitch> > mSwitches;
std::vector< osg::ref_ptr<osgSim::DOFTransform> > mDofs;
};
void singleWindowSideBySideCameras(osgViewer::Viewer& viewer)
@ -262,8 +277,8 @@ int main( int argc, char **argv )
viewer.addEventHandler(new osgViewer::LODScaleHandler());
viewer.addEventHandler(new osgGA::StateSetManipulator());
SwitchDOFVisitor* visit = new SwitchDOFVisitor;
viewer.addEventHandler(visit);
SwitchDOFHandler* switchOFHandler = new SwitchDOFHandler;
viewer.addEventHandler(switchOFHandler);
// load the scene.
osg::ref_ptr<osg::Node> loadedModel = osgDB::readRefNodeFiles(arguments);
@ -289,13 +304,12 @@ int main( int argc, char **argv )
group2->addChild(convertedModel.get());
group2->setNodeMask(2);
// Activate DOF animations and collect switches
loadedModel->accept(*visit);
convertedModel->accept(*visit);
group->addChild(group1);
group->addChild(group2);
// Activate DOF animations and collect switches
switchOFHandler->collectNodesOfInterest(group);
viewer.setSceneData(group);
viewer.setThreadingModel(osgViewer::Viewer::DrawThreadPerContext);