Hello,
I have another problem/misunderstanding with respect to deep cloning.
I have a ChunkMaterial which I need to clone. The material has embedded
ClipPlaneChunks with properly initialized beacon fields. Now, I have
discovered that the ClipPaneChunks of the deep copied ChunkMaterial
still has initialized beacon fields, but on calling getBeacon() on them,
I got a Null pointer. Inspection revealed that the _iRefCount is zero
which prevents returning the beacon object in the following code:
OSGContainerRefCountPolicies.inl
template <class ObjT>
inline ObjT *
WeakRefCountPolicy::validate(ObjT *pObject)
{
if(pObject == NULL)
{
return NULL;
}
else
{
return (pObject->getRefCount() > 0) ? pObject : NULL;
}
}
>
OSGStateD.dll!OSG::WeakRefCountPolicy::validate<OSG::FieldContainer>(OSG
::FieldContainer * pObject=0x000000001a64b780) Line 187 C++
OSGStateD.dll!OSG::PointerAccessHandler<OSG::WeakRefCountPolicy>::valida
te<OSG::FieldContainer>(OSG::FieldContainer * const
pObject=0x000000001a64b780) Line 128 C++
OSGStateD.dll!OSG::PointerSFieldCommon<OSG::PointerAccessHandler<OSG::We
akRefCountPolicy>,0>::ptrStoreGet() Line 98 C++
OSGStateD.dll!OSG::PointerSField<OSG::Node *
__ptr64,OSG::WeakRefCountPolicy,0>::getValue() Line 108 C++
OSGStateD.dll!OSG::ClipPlaneChunkBase::getBeacon() Line 133
C++
RenderEngineD.dll!RenderEngine::tools::check_clip_plane_chunk(OSG::Chunk
Material * mat=0x000000001a64db20) Line 215 + 0x19 bytes C++
My question is now, is that correct by design, from which it follows
that I have made a user mistake? Or could I expect to get a valid
object?
I ran into this problem by carefully inspecting the OpenSG log file I
have written. It has an entry for a missing beacon node originating from
the ClipPlaneChunk::changeFrom method. There is also a test on
getBeacon() != NULL...
So, I need some clarification...
Best,
Johannes
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