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#include <osg/Node>

#include <osgDB/ReadFile>

...

osg::Node* cessnaNode = NULL;

osg::Node* tankNode = NULL;

...

cessnaNode = osgDB::readNodeFile("cessna.osg");

tankNode = osgDB::readNodeFile("Models/T72-tank/t72-tank_des.flt");

// Declare a node which will serve as the root node

// for the scene graph. Since we will be adding nodes

// as 'children' of this node we need to make it a 'group'

// instance.ʵÀý

// The 'node' class represents±íÏÖ the most generic version of nodes.

// This includes nodes that do not have children (leaf nodes.)

// The 'group' class is a specialized version of the node class.

// It adds functions associated with adding and manipulating ²Ù×÷

// children.

osg::Group* root = new osg::Group();

root->addChild(cessnaNode);

// Declare transform, initialize with defaults.ÉùÃ÷λÖú¯Êý²¢ÒÔĬÈÏ·½Ê½³õʼ»¯

osg::PositionAttitudeTransform* tankXform =

new osg::PositionAttitudeTransform();

// Use the 'addChild' method of the osg::Group class to

// add the transform as a child of the root node and the

// tank node as a child of the transform.

root->addChild(tankXform);

tankXform->addChild(tankNode);

// Declare and initialize a Vec3 instance to change the

// position of the tank model in the scene

osg::Vec3 tankPosit(5,0,0);

tankXform->setPosition( tankPosit );

#include <osgProducer/Viewer>

// Declare a 'viewer'

osgProducer::Viewer viewer;

// For now, we can initialize with 'standard settings'

// Standard settings include a standard keyboard mouse

// interface as well as default drive, fly and trackball

// motion models for updating the scene.

viewer.setUpViewer(osgProducer::Viewer::STANDARD_SETTINGS);

// Next we will need to assign the scene graph we created

// above to this viewer:

viewer.setSceneData( root );

// create the windows and start the required threads.

viewer.realize();

// Enter the simulation loop. viewer.done() returns false

// until the user presses the 'esc' key.

// (This can be changed by adding your own keyboard/mouse

// event handler or by changing the settings of the default

// keyboard/mouse event handler)

while( !viewer.done() )

{

// wait for all cull and draw threads to complete.

viewer.sync();

// Initiate scene graph traversal to update nodes.

// Animation nodes will require update. Additionally,

// any node for which an 'update' callback has been

// set up will also be updated. More information on

// settting up callbacks to follow.

viewer.update();

// initiate the cull and draw traversals of the scene.

viewer.frame();

}