OSG使用矩阵实现简单动画

直接上代码：

osg::ref_ptr<osg::Group> createMatrix() {
    osg::ref_ptr<osg::Group> root = new osg::Group;

    osg::ref_ptr<osg::Node> node1 = new osg::Node;
    node1 = osgDB::readNodeFile("xyz.osgt");

    osg::ref_ptr<osg::MatrixTransform> trans = new osg::MatrixTransform;
    trans->setUpdateCallback(new osg::AnimationPathCallback(osg::Vec3(0.0, 0.0, 0.0), osg::Z_AXIS, 1.0));
    osg::ref_ptr<osg::MatrixTransform> trans2 = new osg::MatrixTransform;
    trans2->setMatrix(osg::Matrix::translate(1.2, 0.0, 0.0));
    trans2->addChild(node1.get());
    trans->addChild(trans2.get());

    osg::ref_ptr<osg::MatrixTransform> max3 = new osg::MatrixTransform;
    max3->setUpdateCallback(new osg::AnimationPathCallback(osg::Vec3(5.0, 0.0, 0.0), osg::X_AXIS, 5.0));
    osg::ref_ptr<osg::MatrixTransform> max4 = new osg::MatrixTransform;
    max4->addChild(node1.get());
    max4->setMatrix(osg::Matrix::translate(2.0, 0.0, 0.0));
    max3->addChild(max4.get());


    root->addChild(node1.get());
    root->addChild(trans.get());
    root->addChild(max3.get());

    return root;
}

int main(int argc, char** argv) {

    osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer();

    viewer->addEventHandler(new osgViewer::WindowSizeHandler);
    viewer->addEventHandler(new osgViewer::StatsHandler);
    osg::ref_ptr<osg::Group> root = new osg::Group;
    root->addChild(createMatrix());

    viewer->setSceneData(root);

    viewer->realize();
    viewer->run();

    return 0;
}

运行效果：