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114 lines
4.1 KiB
114 lines
4.1 KiB
/* -*-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 OSGUTIL_UPDATEVISITOR |
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#define OSGUTIL_UPDATEVISITOR 1 |
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#include <osg/NodeVisitor> |
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#include <osg/Node> |
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#include <osg/Geode> |
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#include <osg/Billboard> |
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#include <osg/LOD> |
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#include <osg/Switch> |
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#include <osg/LightSource> |
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#include <osg/Transform> |
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#include <osg/Projection> |
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#include <osg/OccluderNode> |
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#include <osgUtil/Export> |
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namespace osgUtil { |
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/** |
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* Basic UpdateVisitor implementation for animating a scene. |
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* This visitor traverses the scene graph, calling each nodes appCallback if |
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* it exists. |
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*/ |
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class OSGUTIL_EXPORT UpdateVisitor : public osg::NodeVisitor |
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{ |
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public: |
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UpdateVisitor(); |
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virtual ~UpdateVisitor(); |
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META_NodeVisitor("osgUtil","UpdateVisitor") |
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virtual void reset(); |
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/** During traversal each type of node calls its callbacks and its children traversed. */ |
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virtual void apply(osg::Node& node) { handle_callbacks_and_traverse(node); } |
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virtual void apply(osg::Geode& node) { handle_geode_callbacks(node); } |
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virtual void apply(osg::Billboard& node) { handle_geode_callbacks(node); } |
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virtual void apply(osg::LightSource& node) { handle_callbacks_and_traverse(node); } |
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virtual void apply(osg::Group& node) { handle_callbacks_and_traverse(node); } |
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virtual void apply(osg::Transform& node) { handle_callbacks_and_traverse(node); } |
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virtual void apply(osg::Projection& node) { handle_callbacks_and_traverse(node); } |
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virtual void apply(osg::Switch& node) { handle_callbacks_and_traverse(node); } |
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virtual void apply(osg::LOD& node) { handle_callbacks_and_traverse(node); } |
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virtual void apply(osg::OccluderNode& node) { handle_callbacks_and_traverse(node); } |
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protected: |
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// /** Prevent unwanted copy construction.*/ |
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// UpdateVisitor(const UpdateVisitor&):osg::NodeVisitor() {} |
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/** Prevent unwanted copy operator.*/ |
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UpdateVisitor& operator = (const UpdateVisitor&) { return *this; } |
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inline void handle_callbacks(osg::StateSet* stateset) |
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{ |
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if (stateset && stateset->requiresUpdateTraversal()) |
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{ |
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stateset->runUpdateCallbacks(this); |
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} |
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} |
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inline void handle_callbacks_and_traverse(osg::Node& node) |
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{ |
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handle_callbacks(node.getStateSet()); |
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osg::NodeCallback* callback = node.getUpdateCallback(); |
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if (callback) (*callback)(&node,this); |
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else if (node.getNumChildrenRequiringUpdateTraversal()>0) traverse(node); |
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} |
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inline void handle_geode_callbacks(osg::Geode& geode) |
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{ |
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handle_callbacks(geode.getStateSet()); |
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osg::NodeCallback* callback = geode.getUpdateCallback(); |
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if (callback) (*callback)(&geode,this); |
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// Call the app callbacks on the drawables. |
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for(unsigned int i=0;i<geode.getNumDrawables();++i) |
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{ |
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osg::Drawable::UpdateCallback* callback = geode.getDrawable(i)->getUpdateCallback(); |
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if (callback) callback->update(this,geode.getDrawable(i)); |
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handle_callbacks(geode.getDrawable(i)->getStateSet()); |
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} |
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// should we traverse just in case a subclass of Geode adds children?? Won't for now as |
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// Geode's arn't designed to have children. |
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// traverse(geode); |
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} |
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}; |
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} |
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#endif |
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