We noticed a Bug in osgAnimation of the stable osg release 2.8.2, and
only on Linux ( Ubuntu 9.04 ), which does not occur on Windows with
Visual Studio 2005.
When writing out an osgAnimation programm to a osg file, the process
stops before writing keyframe data:
Node {
nodeMask 0x
cullingActive TRUE
UpdateCallbacks {
osgAnimation::BasicAnimationManager {
num_animations 1
osgAnimation::Animation {
name myTestanimation
num_channels 1
Channel {
name position
target whatever
Keyframes Vec3 2 {
In Debug Mode we figured out, that the problem comes from
src/osgplugins/osganimation/ReaderWriter.cpp Line 273, 274, pointer kk
points to adresse 0x0 after dynamic_cast
osgAnimation::Vec3KeyframeContainer* kk =
dynamic_castosgAnimation::Vec3KeyframeContainer*(kf);
fw.indent() key (*kk)[k].getTime()
(*kk)[k].getValue() std::endl;
Source Code Attached
Cheers, searching for the Pivot of my Soul, PP !!!
/* -*-c++-*-
* Copyright (C) 2008 Cedric Pinson morni...@plopbyte.net
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#include iostream
#include osg/Geometry
#include osg/Shape
#include osg/ShapeDrawable
#include osgViewer/Viewer
#include osgDB/FileUtils
#include osgDB/WriteFile
#include osgDB/ReadFile
#include osgGA/TrackballManipulator
#include osg/MatrixTransform
#include osg/Material
#include osgAnimation/Sampler
#include osgAnimation/BasicAnimationManager
#include osgAnimation/Animation
int main( int , char** )
{
//create node
osg::Node* testNode = new osg::Node(); //you can also use osg::Group or osg::MatrixTransform here
//create animationmanager (= updatecallback)
osgAnimation::BasicAnimationManager* testanimationManager = new osgAnimation::BasicAnimationManager();
//create animation for this updatecallback
osgAnimation::Animation* testAnimation = new osgAnimation::Animation();
testAnimation-setName(myTestanimation);
//create channel for this animation
osgAnimation::Vec3LinearChannel* testchannel = new osgAnimation::Vec3LinearChannel; //we are not using Vec3CubicBezier because this cannot be written to file. maybe it is not specified in writer.
testchannel-setTargetName(whatever);
testchannel-setName(position); //the name must be a certain keyword like position otherwise it does not work
//get keys and fill them with some data --- WARNING: IF you add no keys, programm will crash when calling testAnimation-addChannel(testchannel);
osgAnimation::Vec3KeyframeContainer* keys = testchannel-getOrCreateSampler()-getOrCreateKeyframeContainer();
keys-push_back(osgAnimation::Vec3Keyframe(0, osg::Vec3(0,0,0))); //first frame
keys-push_back(osgAnimation::Vec3Keyframe(2, osg::Vec3(1,1,0))); //second frame
// now add channel to animation
testAnimation-addChannel(testchannel);
//add animation to updatecallback
testanimationManager-registerAnimation(testAnimation);
//add updatecallback (=animationmanager) to node
testNode-addUpdateCallback(testanimationManager);
//in the end write all data to a file
osgDB::writeNodeFile(*testNode, testNode.osg);
}
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