Hey again! I'm not sure. I thought it was the fact that the bounding sphere grew due to the particle effect and made the TrackballManipulator zoom out to render the entire scene.
Here's a way to test if it is the viewer: make the particle effect very, very small. If the other object doesn't shrink it's because the manipulator can fit the scene without zooming. Other than that I'm clueless. /Peter On 2007-07-31 (Tue) 18:24, Franclin Foping wrote: > Hi, > unfortunately your answer did not sort out the issue. > So here is what happens: > I create a root node with a child to render a fish (or an object). I am > using osgProducer/viewer > But when I render the scene with only one object, everything is perfect BUT > when I add a particle system or something else, the fish appears too small > on screen. > Why? > > Peter Gebauer <[EMAIL PROTECTED]> a écrit : Hello! > > Are you using a viewer? If so, are you using a matrix manipulator for your > viewer? The viewer automatically transforms the matrix to fit the bounding > sphere of the scene data. > > You can test if this is the case by setting a fixed home position of the > manipulator. If you're calling viewer.run() it will setup a trackball > manipulator as a default. You can use the trackball manipulator (or any > other) and set a fixed home position instead of getting an auto calculated > one: > > osgGA::TrackballManipulator *manipulator = new > osgGA::TrackballManipulator(); > // Change coordinates to something that will work for your scene > manipulator->setHomePosition(osg::Vec3d(50.0, 50.0, 400.0), > osg::Vec3d(50.0, 50.0, 0.0), > osg::Vec3d(0.0, 0.0, 1.0), > false); // do not auto calculate home > viewer.setCameraManipulator(manipulator); > > Could be the answer or maybe I just misunderstood your problem. > > /Peter > > > On 2007-07-31 (Tue) 02:08, Franclin Foping wrote: > > Hi All, > > I have got a very simple scene graph consisting of a root node (Group), a > > node object and a particle system. > > I have noticed that when I add the particle system node (containing the > > Geode for particle system) to the root, the other object of the scene > > appears shrink. > > What could be the problem? > > > > My scene graph looks like: root->addChild(node); > > > > root->addChild(ParticleSystem); > > > > Thanks for your help! > > > > > > > > --------------------------------- > > Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! > > Mail > > _______________________________________________ > > osg-users mailing list > > [email protected] > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > --------------------------------- > Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! Mail > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
