Hello Johannes, On Wed, Mar 10, 2021 at 1:08 PM Johannes Brunen <jbru...@datasolid.de> wrote: > Say I have a container with a material field (MaterialGroup) in it and I want that my special material (MyMaterial) must not to be deep cloned but shared. So I provide myMaterial to the shareTypes parameter of the deepClone method. > > > deepClone checks for each of the fields of the given 'src' container the following in order to decide if the field is to be cloned or shared: > > > // check if type should by shared > > if(TypePredicates::typeInGroupIds( > shareGroupIds.begin(), > shareGroupIds.end (), *rcType) || > TypePredicates::typeDerivedFrom( > shareTypes.begin(), > shareTypes.end (), *rcType) )
the way I'm reading this, it means if the field we are looking at is derived from any of the types in shareTypes it gets shared, which sounds correct to me. > Now the function TypePredicates::typeDerivedFrom states > > > /*! Tests if \a type is derived from any of the types in the sequence > specified by [\a begin, \a end). The sequence must consist of pointers > to TypeBase objects (or a derived class), e.g. > std::vector\<const FieldContainerType *\>. > > \param[in] begin Start of sequence. > \param[in] end End of sequence. > \param[in] type Type that is tested. > \return true, if \a type is derived from any of the types in > [\a begin, \a end), false otherwise. > */ > template <class InIteratorTypeT> inline > bool TypePredicates::typeDerivedFrom( InIteratorTypeT begin, > InIteratorTypeT end, > const OSG::TypeBase &type ) > > > In my case MyMaterial is derived from Material but the test gives only true if Material would be derived from MyMaterial what is not the case. I'm not following this reasoning; I think I'm overlooking something, sorry. If you put MyMaterial's type into the list, other Materials should not be shared, but MyMaterials (and types derived from MyMaterial) should be shared; at least I believe that was the idea modulo bugs. Cheers, Carsten
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