Hi,
I've been migrating some code from OSG 0.9.9 to the latest stable release
(2.8.3), and I've run into an issue when migrating from OSGProducer::viewer to
OsgViewer::viewer. I have three models, an airplane.3ds model, a sky.3ds model,
and a globe.osga model. All three models load correctly (the nodes returned
from osgDB::readNodeFile are not NULL), but only the airplane model shows up
when the viewer display is rendered.
The only functions that I needed to change from osgProducer to osgViewer were
my initialization and update functions. I've made sure to replace osgProducer
calls with equivalent osgViewer calls when I upgraded (see code below), but is
there anything I might have missed?
Code:
3DPlaneViewer::Initialize(){
osgViewer::Viewer* viewer = new osgViewer::Viewer();
//scene root
osg::Group* root = new osg::Group();
//load globe and add transform of globe to root group
osg::Node* globeNode = osgDB::readNodeFile("globe.osga");
osg::MatrixTransform* globeTransform = new osg::MatrixTransform();
globeTransform->addChild( globeNode );
//create group for globe and sky
osg::Group*terrainNodes = new Group();
terrainNodes->asGroup()->addChild( globeTransform );
//load airplane
osg::Node* airplaneNode = osgDB::readNodeFile("airplane.3ds");
//specify a location for plane on globe with lat, long, altitude
osg::Matrixd airplaneMatrix;
osg::EllipsoidModel* ellipse->computeLocalToWorldTransformFromLatLongHeight(
osg::DegreesToRadians(20.0f),osg::DegreesToRadians(-30.0f),
15000,airplaneMatrix );
//rotate airplane node
airplaneMatrix.preMult( airplaneMatrix.rotate(
osg::Quat(osg::DegreesToRadians(180.0f), osg::Vec3f( 0, 0, 1 ) )));
//setup matrix wrapper node
osg::MatrixTransform* airplaneTransform = new osg::MatrixTransform();
airplaneTransform->getOrCreateStateSet()->setMode(GL_RESCALE_NORMAL,osg::StateAttribute::ON);
airplaneTransform->setMatrix(airplaneMatrix);
airplaneTransform->addChild( airplaneNode );
terrainNodes->asGroup()->addChild( airplaneTransform );
//load and add the sky model
osg::Node* skyNode = osgDB::readNodeFile("sky.3DS");
osg::MatrixTransform* skyTransform = new osg::MatrixTransform();
skyTransform->addChild( skyNode );
terrainNodes->asGroup()->addChild( skyTransform );
root->addChild( terrainNodes );
//realize the scene in the viewer
viewer->setSceneData(root);
viewer->realize();
}
3DPlaneViewer::Update()
{
//removed calls to osgProducer::sync()
viewer->updateTraversal();
//do some other updates on other objects in the scene
viewer->frame();
}
Thanks,
John
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=32136#32136
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