OpenSceneGraph 3.0 by Beginner's Guide

Author:Beginner's Guide [eBook]
Language: eng
Format: epub
Publisher: Packt Publishing

The first task is to look for any textures applied to a loaded model. We have to derive a FindTextureVisitor from the osg::NodeVisitor base class. This manages a texture object, which will be used for render-to-textures operation later. Every time we find an existing texture in the scene graph, we replace it with the managed one. This is implemented in the replaceTexture() method:class FindTextureVisitor : public osg::NodeVisitor { public: FindTextureVisitor( osg::Texture* tex ) : _texture(tex) { setTraversalMode( osg::NodeVisitor::TRAVERSE_ALL_CHILDREN ); } virtual void apply( osg::Node& node ); virtual void apply( osg::Geode& geode ); void replaceTexture( osg::StateSet* ss ); protected: osg::ref_ptr<osg::Texture> _texture; };

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