FGFS-4.1/OpenSceneGraph
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Added support for shallow and deep copy of nodes, drawables and state, via a

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copy constructor which takes an optional Cloner object, and the old
osg::Object::clone() has changed so that it now requires a Cloner as paramter.
This is passed on to the copy constructor to help control the shallow vs
deep copying.  The old functionality of clone() which was clone of type has
been renamed to cloneType().

Updated all of the OSG to work with these new conventions, implemention all
the required copy constructors etc.  A couple of areas will do shallow
copies by design, a couple of other still need to be updated to do either
shallow or deep.

Neither of the shallow or deep copy operations have been tested yet, only
the old functionality of the OSG has been checked so far, such running the
viewer on various demo datasets.

Also fixed a problem in osg::Optimize::RemoveRendundentNodesVisitor which
was not checking that Group didn't have have any attached StateSet's, Callbacks
or UserData.  These checks have now been added, which fixes a bug which was
revealled by the new osgscribe demo, this related to removal of group acting
as state decorator.

method
This commit is contained in:
Robert Osfield
2002-01-28 21:17:01 +00:00
parent 7f65110322
commit f612924a45
74 changed files with 898 additions and 263 deletions
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18
include/osg/StateAttribute
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@@ -22,8 +22,9 @@ class StateSet;
* the standard pure virtual methods which are required for all Object
* subclasses.*/
#define META_StateAttribute(name,type) \
virtual Object* clone() const { return new name (); } \
virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const name *>(obj)!=NULL; } \
virtual osg::Object* cloneType() const { return new name(); } \
virtual osg::Object* clone(const osg::Cloner& cloner) const { return new name (*this,cloner); } \
virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const name *>(obj)!=NULL; } \
virtual const char* className() const { return #name; } \
virtual const Type getType() const { return type; }
@@ -147,9 +148,18 @@ class SG_EXPORT StateAttribute : public Object
};
StateAttribute() {}
StateAttribute(const StateAttribute& sa,const Cloner& cloner=ShallowCopy()):
Object(sa,cloner) {}
/** return a shallow copy of a node, with Object* return type.*/
virtual Object* clone() const = 0;
/** Clone the type of an attribute, with Object* return type.
Must be defined by derived classes.*/
virtual Object* cloneType() const = 0;
/** Clone an attribute, with Object* return type.
Must be defined by derived classes.*/
virtual Object* clone(const Cloner&) const = 0;
/** return true if this and obj are of the same kind of object.*/
virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const StateAttribute*>(obj)!=NULL; }