Hi Stuart,
Could you try to replace ReadExternalsVisitor in ReaderWriterFLT.cpp
with the code below and give it a try. The magic word (reader option)
is "cloneExternalReferences".
class ReadExternalsVisitor : public osg::NodeVisitor
{
bool _cloneExternalReferences;
osg::ref_ptr<ReaderWriter::Options> _options;
public:
ReadExternalsVisitor(ReaderWriter::Options* options) :
osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
_options(options),
_cloneExternalReferences(false)
{
if (options)
_cloneExternalReferences =
(options->getOptionString().find("cloneExternalReferences")!=std::string::npos);
}
virtual ~ReadExternalsVisitor() {}
virtual void apply(ProxyNode& node)
{
// Transfer ownership of pools.
_options->setUserData( node.getUserData() );
node.setUserData(NULL);
for (unsigned int pos=0; pos<node.getNumFileNames(); pos++)
{
std::string filename = node.getFileName(pos);
// read external
osg::Node* external = osgDB::readNodeFile(filename,_options.get());
if (external)
{
if (_cloneExternalReferences)
external =
dynamic_cast<osg::Node*>(external->clone(osg::CopyOp(osg::CopyOp::DEEP_COPY_NODES)));
node.addChild(external);
}
}
}
};
Brede
On 11/29/06, Paul Martz <[EMAIL PROTECTED]> wrote:
> > > Does OSG have a similar function?
> >
> > node->clone(osg::CopyOp(...))
>
> Great! Then I suggest that that is how users will expect flt
> external references to be implemented. Shared instancing
> using multiple parents was used for internal instances and
> replications, but not external instances.
If you implement this in the OpenFlight loader, could you do so as an
option? The current behavior of multiply parenting a single instance would
be preferable in situations where the ext ref is not to be dynamically
manipulated.
-Paul
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