Hi Max,
I don't know if this is related but take a look at the attached email. There appears to be quite a few issues with the osg::Sequence class and you are probably encountering one of them. Please try my suggested fix as it seems to work for me. Regards, Andy ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Max Bandazian Sent: 07 August 2008 18:26 To: osg-users@lists.openscenegraph.org Subject: [osg-users] osg sequence timing Hi, I am experiencing some buggy behavior relating to loaded openflight files containing sequences, and I would appreciate any suggestions. When such a file is loaded after the viewer has been running for a bit, the animation runs at the wrong speed. Here's some sample code that illustrates the problem: osg::ref_ptr<osg::Group> rootNode = new osg::Group; osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer; viewer->setUpViewOnSingleScreen(0); viewer->setSceneData(rootNode.get()); viewer->setCameraManipulator(new osgGA::TrackballManipulator()); viewer->realize(); while(!viewer->done() && viewer->getFrameStamp()->getFrameNumber() < 500) { viewer->frame(); } osg::ref_ptr<osg::Node> modelNode = osgDB::readNodeFile("some_animation.flt"); rootNode->addChild(modelNode.get()); while(!viewer->done()) { viewer->frame(); } When the animation gets loaded in the above code, it runs much faster than it ought to for around 5 seconds, and then runs at the normal rate. It appears to be "catching up" with the frame time. Sending a visitor down every loaded flt file and setting sync to true on all sequences seems to fix the problem, but it seems like this should not be necessary. Thanks, Max Bandazian
--- Begin Message ---Hi All, I have found a possible bug in osg::Sequence. Can anyone confirm this and/or let me know if it is fixed in a newer release than 2.4? To reproduce the bug: 1. Create a template osg::Sequence node (and underlying geometry) but do not attach the node to the current active scenegraph. 2. At some point during the rendering loop (perhaps on a keystroke) clone the sequence node (I use the call: dynamic_cast<osg::Node*>(templateNode -> clone( osg::CopyOp( (osg::CopyOp::CopyFlags)osg::CopyOp::DEEP_COPY_NODES ) ) ) 3. Set the cloned sequence node duration to a value that makes the animation run slower (i.e. 2.0). 4. Start the cloned sequence (using setMode()). 5. Repeat steps 2 - 4 and observe that the cloned sequences do not run slow but run as fast, appearing to ignore the duration that has been set on them. Looking at the 'good documentation' (2.4 source code), I see that _start is being set to _now (osg::Sequence::setMode(), line 192). Should this not _start not be set to -1.0? PS: It is also interesting to note that when loading OpenFlight file with the frameTime set to 0.0, setting duration will have no effect. Perhaps the OpenFlight loader should provide a very small default frameTime value if the incoming value from the OpenFlight file is 0.0. PS2: It also looks like the _nrepRemain value is not being reset when setMode( START ) is called. To reset the value you must call setDuration again. Regards, Andy Business Development Manager Embedded Simulation Group GE Fanuc Intelligent Platforms Applied Image Processing (formally Octec) The Western Centre, Western Rd, Bracknell Berkshire, England, RG12 1RW Tel: +44 (0)1344 464908 Fax: +44 (0)1344 465201 Web: http://www.octec.com GE Fanuc Intelligent Platforms (Bracknell) Ltd, registered in England and Wales (2393111) at 100 Barbirolli Square, Manchester, M2 3AB, VAT GB 530 094 183 This email is private and confidential and for the addressee only. If misdirected, please notify us by telephone and confirm that it has been deleted from your system and any hard copies destroyed. You are strictly prohibited from using, printing, distributing or disseminating it or any information contained in it save to the intended recipient.
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