[osg-users] ease motion with viewer camera
Hi,
ok, just a few words to tell you what i am trying to do.
have a 3D scene, to this point nothing special. On this 3D scene I draw (like
we can do in Paint) a rectangle. I add a camera which has as child node this
Geode.
My greatest wishes, for now, is to make an ease motion from my viewer camera(V)
to this geode camera(C).
I had already take a look to the osgeasemotion example and try to do the same
but the movement is not the one i expect.
For the moment, before the movement, i creat one quaterion to precise the
rotation my viewer camera should do to get the geode camera's one. I get the
eye, center and up axes of each camera, and make the quat like this:
Code:
osg::Vec3 from = eyeV - centerC;
osg::Vec3 to = eyeC - centerC;
rot.makeRotate_original(from, to);
Then i attach a nodeCallBack to my viewer camera which suppose to do the job,
like this:
Code:
void operator()(osg::Node* node, osg::NodeVisitor* nv)
{
if(!_motion.valid()) return;
if(isDone) return;
else
{
osg::Camera* cam = dynamic_castosg::Camera*(node);
if(!cam)
{
std::cout !cam std::endl;
return;
}
double t = nv-getFrameStamp()-getSimulationTime();
if(_previous == 0.0f)
_previous = t;
_motion-update(t - _previous);
_previous = t;
float pas = _motion-getValue();
cam-setViewMatrix(osg::Matrix::inverse(osg::Matrix::rotate(rot*pas)*osg::Matrix::translate(trans*pas)));
cam-setReferenceFrame(osg::Transform::ABSOLUTE_RF);
if(_motion-getTime() == 2.0)
{
std::cout fini std::endl;
_motion-reset();
_previous = 0.0;
isDone = true;
}
traverse(node,nv);
}
}
I am about to reach the good position but my camera don't look the good center.
Is there anyone who could help me?
Thank you!
Regards,
Stephane
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=38502#38502
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