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我學習OSG的這些天:爲什麼model-> asGeode();返回NULL?
// Assumes the Cessna's root node is a group node.
osg::ref_ptr<osg::Node> model = osgDB::readNodeFile("cessna.osg");
osg::Group* convModel1 = model->asGroup(); // OK!
osg::Geode* convModel2 = model->asGeode(); // Returns NULL?
爲什麼模型 - > asGeode();返回NULL?