I just started using AnimationPathCallbacks so maybe, I'm asking silly things, anyway, in the code I'm testing I have two 3D objects, each with its AnimationPathCallback. Since the animation that I exported from 3dsmax is too fast, I want to slow it down using the AnimationPathCallbacks methods. To perform this task I created a visitor that search for nodes that have an AnimationPathCallback and, for each, I set the time multiplier as needed. But my problem is that everythings works fine if I perform this scene visiting "after" the application has started and the scene displayed, but it doesn't work if I do it "before" the application main loop. In particular the visitor correctly returns every node with its callback in the first case, but in the second case the visitor manage to find just one callback and ignores the other. I don't know exactly how AnimationPaths work and how they relate to Viewers, but it looks like that I if perform my scene visiting just after the realization of the viewer, then the behaviour is correct and I get every node (with a callback) as I expected...
Am I doing something wrong? Thanks. Regards. Alessandro On 6/5/07, Robert Osfield <[EMAIL PROTECTED]> wrote:
Hi Alessandro, You can control the start times of AnimationPathCallbacks. In the SVN there a few better controls for this. If you do things programatically you might find it easier, i.e export your objects separately from 3DMax and then attach a single animation path to them both, or just attach the animation path to the viewer. For the later you can use the osgGA::AnimationPathManipulator, and apps like osgviewer even have support for reading from animation path files on the command line i.e.: osgviewer cow.osg -p myanimation.path Robert. On 6/5/07, alessandro terenzi <[EMAIL PROTECTED]> wrote: > Hi Robert, > thank you for your answer. You're right about the structure of my scene > graph: I have the planet's geometry under its Transform and > AnimationPathCallback nodes and I have the sphere under another Transform > with another AnimationPathCallback ... but I cannot follow your suggestion > to put the sphere under the planet's Transform because I need to keep them > separated (it would be difficult to explain the reason now :) > > I've never used AnimationPath, so I don't understand exactly the other > solution to attach the AnimationPath to viewers Camera... > > Anyway, not considering my specific problem, I think that in general the > problem may be formulated as follows: > > if I have a not visible node (whose nodemask is set to 0) and an > AnimationPathCallback that manages its animation, is there a way to let the > animation start even though the node is not visible yet? In this case when > the node will come visible the animation will eventually be in synch with > other animations in the scene... > > Thanks. Regards. > Alessandro > > On 6/5/07, Robert Osfield <[EMAIL PROTECTED]> wrote: > > Hi Alessandro, > > > > For type of thinsg you are doing there are two main ways to animation > > things - to animate the camera path, or to animate the objects in the > > scene. > > > > I'm not familiar with 3DMax's export to the OSG so can't comment > > specifically on this, but I'd suspect its created an AnimationPath > > attached to a Transform which is above the planet, so the objects is > > moving and the camera is stationary. Then you have your transparent > > sphere, and I'd guess that this is not under the planets Transform > > node so isn't moved with it. > > > > To fix things you either need to put the sphere under the same > > Transform as the planet, or you need to attach the AnimationPath to > > viewers Camera. > > > > Robert. > > > > On 6/5/07, alessandro terenzi <[EMAIL PROTECTED]> wrote: > > > I'm experiencing the following problem: > > > > > > I exported a model from 3dsmax to OSG, the model consist of 2 objects: > > > > > > - a planet that is animated in order to follow a circular path > > > - a semi-transparent sphere linked to the planet (its purpose, in OSG, > > > should be to highlight the planet when the mouse move over the planet) > > > > > > So, in 3dsmax, I linked the sphere to the planet, because it should > follow > > > the animated planet. In my OSG application the planet is shown from the > very > > > beginnig of the application, and it starts following the path > immediatly. On > > > the other hand, I chose to hide the sphere (setting the corrensponding > > > nodemask to 0x00000000) until the mouse moves over the planet, but I see > > > that when that event occurs, the sphere is shown (I set nodemask to > > > 0xFFFFFFFF) but not in the same position of the planet (as I expected). > I > > > mean that the sphere follows the same path as the planet but it seems > that > > > the animation started just when I unhid the sphere, so it is late with > > > respect to the planet... > > > > > > How can I solve the problem? Is it related to the fact that I'm > > > hyding/unhyding using the nodemask? > > > Is there a way to let the animation start even though the corresponding > node > > > is not visible? > > > > > > Thanks! > > > Regards. > > > > > > Alessandro > > > _______________________________________________ > > > osg-users mailing list > > > [email protected] > > > http://openscenegraph.net/mailman/listinfo/osg-users > > > http://www.openscenegraph.org/ > > > > > _______________________________________________ > > osg-users mailing list > > [email protected] > > http://openscenegraph.net/mailman/listinfo/osg-users > > http://www.openscenegraph.org/ > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://openscenegraph.net/mailman/listinfo/osg-users > http://www.openscenegraph.org/ > _______________________________________________ osg-users mailing list [email protected] http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
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