[osg-users] How to actually play animation in osgt file

[Warren Schwartz]

I am trying to render an animated model in an X-Plane 11 plugin using OSG 3.6.3 (using Viewer::setUpViewerAsEmbeddedInWindow and glEnableClientState). I can see the model, but the animation does not play. (The model was exported from Blender using the osgexport plugin).

This is the code I have to verify that there actually is an animation in the exported .osgt model:


Code:
osg::ref_ptr<osg::Group> osgModelGroup = dynamic_cast<osg::Group*>( osgModelNode.get() );
if (osgModelGroup) {
    osgAnimation::BasicAnimationManager* animationManager = dynamic_cast<osgAnimation::BasicAnimationManager*>(osgModelGroup->getUpdateCallback());
    if (animationManager) {
        std::cout << "got animation manager\n";
        const osgAnimation::AnimationList& animations = animationManager->getAnimationList();
        for (int i = 0; i < animations.size(); i++) {
            anim = animations[i].get();
            animDuration = anim->getDuration();
            osg::Object* animObj = dynamic_cast<osg::Object*>(anim);
            std::string animName = "";
            if (animObj)
                animName = animObj->getName();
            std::cout << "found an animation '" << animName << "' with duration " << animDuration << "\n";
            animationManager->playAnimation(anim); // does nothing
            std::cout << "animation has " << anim->getChannels().size() << "channels\n";
        }
    }
    else {
        std::cout << "no animation manager\n";
    }
}
else {
    std::cout << "no group for osgModelNode\n";
}



The output is:
got animation manager
found an animation 'ArmatureAction' with duration 5.96667
animation has 198channels


And in X-Plane's draw loop, there is code to manually update the animation:

Code:
std::cout << "Rendering OSG scene...\n";
if (anim) {
    animTime += 1 / 60.0f; // assuming osg interprets time as seconds and not frames...
    if (animTime > animDuration);
        animTime = 0;
    anim->update(animTime);
    std::cout << "updated animation\n";
}
mViewer->frame();



This also prints the expected output. What am I doing wrong here?

Thanks for any info.

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