osg节点轮流显示，隐藏和显示

#include <osg/Node> #include <osg/Shape> #include <osgViewer/Viewer> #include <osg/ShapeDrawable> #pragma comment(lib,"osgd.lib") #pragma comment(lib,"osgViewerd.lib") class MaskCallBack :public osg::NodeCallback { public: MaskCallBack(osg::Node* node) :m_mask(0), m_node(node), m_tick(0){} virtual void operator()(osg::Node* node, osg::NodeVisitor* nv) { if (m_tick < 1000) { m_tick++; return; } else { m_tick = 0; } if (m_node) m_node->setNodeMask(m_mask); if (node) node->setNodeMask(m_mask = ~m_mask); } protected: ~MaskCallBack(){} unsigned int m_mask; osg::ref_ptr<osg::Node> m_node; unsigned int m_tick; }; int main(int *argc, char *argv[]) { osgViewer::Viewer viewer; osg::ref_ptr<osg::Group> group = new osg::Group; osg::ref_ptr<osg::Geode> node1 = new osg::Geode; osg::ref_ptr<osg::ShapeDrawable> shape1 = new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(100, 0, 0), 20.0)); shape1->setColor(osg::Vec4(1, 0, 0, 1)); node1->addDrawable(shape1.get()); osg::ref_ptr<osg::Geode> node2 = new osg::Geode; osg::ref_ptr<osg::ShapeDrawable> shape2 = new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(-100, 0, 0), 20.0)); shape2->setColor(osg::Vec4(0, 1, 0, 1)); node2->addDrawable(shape2.get()); //node1->setNodeMask(0x0); node1->setUpdateCallback(new MaskCallBack(node2)); node2->setUpdateCallback(new MaskCallBack(node1)); group->addChild(node1.get()); group->addChild(node2.get()); viewer.setSceneData(group.get()); viewer.realize(); viewer.run(); }