92 lines
2.7 KiB
Plaintext
92 lines
2.7 KiB
Plaintext
//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
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//Distributed under the terms of the GNU Library General Public License (LGPL)
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//as published by the Free Software Foundation.
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#ifndef OSG_NODECALLBACK
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#define OSG_NODECALLBACK 1
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#include <osg/Referenced>
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namespace osg {
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class Node;
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class NodeVisitor;
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class SG_EXPORT NodeCallback : public Referenced {
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public :
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/** The range of values which can be accumulated by the NodeVisitor. */
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enum Requirements
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{
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NO_REQUIREMENTS = 0x0,
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REQUIRES_TRAVERSAL = 0x1,
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REQUIRES_PARENT_PATH = 0x2,
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REQUIRES_ACCUMULATED_MATRIX = 0x4,
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REQUIRES_ACCUMULATED_INVERSE = 0x8
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};
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NodeCallback(const Requirements ncr=NO_REQUIREMENTS):_requirements(ncr) {}
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virtual ~NodeCallback() {}
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/** Set what values from traversal are required by this NodeCallback.*/
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inline void setRequirements(const Requirements ncr) { _requirements=ncr; }
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/** Get what values from traversal are required by this NodeCallback.*/
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inline const Requirements getRequirements() const { return _requirements; }
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/** Callback method call by the NodeVisitor when visiting a node.*/
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virtual void operator()(Node*, NodeVisitor*) {}
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/** Call any nested callbacks and then traverse the scene graph. */
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void traverse(Node* node,NodeVisitor* nv);
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void setNestedCallback(NodeCallback* nc) { _nestedCallback = nc; }
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NodeCallback* getNestedCallback() { return _nestedCallback.get(); }
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inline void addNestedCallback(NodeCallback* nc)
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{
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if (nc)
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{
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if (_nestedCallback.valid())
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{
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nc->addNestedCallback(_nestedCallback.get());
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_nestedCallback = nc;
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}
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else
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{
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_nestedCallback = nc;
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}
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}
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}
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inline void removeNestedCallback(NodeCallback* nc)
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{
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if (nc)
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{
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if (_nestedCallback==nc)
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{
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NodeCallback* nested_nc = _nestedCallback->getNestedCallback();
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if (nested_nc) _nestedCallback = nc;
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else _nestedCallback = 0;
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}
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else
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{
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_nestedCallback->removeNestedCallback(nc);
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}
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}
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}
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public:
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Requirements _requirements;
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ref_ptr<NodeCallback> _nestedCallback;
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};
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} // namespace
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#endif
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