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69 lines
2.2 KiB
69 lines
2.2 KiB
13 years ago
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSGSIM_INSERTIMPOSTORSVISITOR
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#define OSGSIM_INSERTIMPOSTORSVISITOR
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#include <osg/NodeVisitor>
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#include <osgSim/Impostor>
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namespace osgSim {
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/** Insert impostor nodes into scene graph.
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* For example of usage see examples/osgimpostor.
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*/
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class OSGSIM_EXPORT InsertImpostorsVisitor : public osg::NodeVisitor
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{
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public:
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/** Default to traversing all children. */
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InsertImpostorsVisitor();
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META_NodeVisitor("osgSim","InsertImpostorsVisitor")
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void setImpostorThresholdRatio(float ratio) { _impostorThresholdRatio = ratio; }
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float getImpostorThresholdRatio() const { return _impostorThresholdRatio; }
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void setMaximumNumberOfNestedImpostors(unsigned int num) { _maximumNumNestedImpostors = num; }
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unsigned int getMaximumNumberOfNestedImpostors() const { return _maximumNumNestedImpostors; }
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/** Empty visitor, make it ready for next traversal. */
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void reset();
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virtual void apply(osg::Node& node);
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virtual void apply(osg::Group& node);
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virtual void apply(osg::LOD& node);
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/* Insert the required impostors into the scene graph. */
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void insertImpostors();
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protected:
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typedef std::vector< osg::Group* > GroupList;
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typedef std::vector< osg::LOD* > LODList;
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GroupList _groupList;
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LODList _lodList;
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float _impostorThresholdRatio;
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unsigned int _maximumNumNestedImpostors;
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unsigned int _numNestedImpostors;
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};
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}
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#endif
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