From Cedric Pinson, Store the linkvisitor to be able to configure it by user, like changing the nodemaskoverride, or use a custom LinkVisitor

src/osgAnimation/AnimationManagerBase.cpp

@@ -21,7 +21,7 @@ AnimationManagerBase::~AnimationManagerBase() {}
 
 AnimationManagerBase::AnimationManagerBase()
 {
-    _needToLink = false; 
+    _needToLink = false;
 }
 
 void AnimationManagerBase::clearTargets()
@@ -95,11 +95,25 @@ void AnimationManagerBase::registerAnimation (Animation* animation)
 bool AnimationManagerBase::needToLink() const { return _needToLink; }
 
 
+void AnimationManagerBase::setLinkVisitor(LinkVisitor* visitor)
+{
+    _linker = visitor;
+}
+
+LinkVisitor* AnimationManagerBase::getOrCreateLinkVisitor()
+{
+    if (!_linker.valid())
+        _linker = new LinkVisitor;
+    return _linker.get();
+}
 
 void AnimationManagerBase::link(osg::Node* subgraph)
 {
-    LinkVisitor linker(_animations);
-    subgraph->accept(linker);
+    LinkVisitor* linker = getOrCreateLinkVisitor();
+    linker->getAnimationList().clear();
+    linker->getAnimationList() = _animations;
+
+    subgraph->accept(*linker);
     _needToLink = false;
     buildTargetReference();
 }

src/osgAnimation/CMakeLists.txt

@@ -54,6 +54,7 @@ ADD_LIBRARY(${LIB_NAME}
     BasicAnimationManager.cpp
     Bone.cpp
     Channel.cpp
+    LinkVisitor.cpp
     MorphGeometry.cpp
     RigGeometry.cpp
     Skeleton.cpp

src/osgAnimation/LinkVisitor.cpp

@@ -0,0 +1,50 @@
+/*  -*-c++-*- 
+ *  Copyright (C) 2009 Cedric Pinson <cedric.pinson@plopbyte.net>
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include <osgAnimation/LinkVisitor>
+#include <osgAnimation/UpdateCallback>
+#include <osg/Notify>
+
+using namespace osgAnimation;
+
+LinkVisitor::LinkVisitor() : osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) 
+{
+    _nbLinkedTarget = 0;
+}
+
+void LinkVisitor::reset()
+{
+    _nbLinkedTarget = 0;
+}
+
+AnimationList& LinkVisitor::getAnimationList()
+{
+    return _animations;
+}
+
+void LinkVisitor::apply(osg::Node& node)
+{
+    osgAnimation::AnimationUpdateCallback* cb = dynamic_cast<osgAnimation::AnimationUpdateCallback*>(node.getUpdateCallback());
+    if (cb) 
+    {
+        int result = 0;
+        for (int i = 0; i < (int)_animations.size(); i++)
+        {
+            result += cb->link(_animations[i].get());
+            _nbLinkedTarget += result;
+        }
+        osg::notify(osg::NOTICE) << "LinkVisitor links " << result << " for \"" << cb->getName() << '"' << std::endl;
+    }
+    traverse(node);
+}