Hi,
I am trying to move a pyramid in the following manner.
(X,Y,Z,Roll,Pitch,Yaw) -> read from a txt file.
Move the pyramid by (X,Y,Z) and then rotate it about its peak by (Roll, Pitch,
Yaw)
Here's the code I made till now:
> osg::AnimationPath* animationPath =
> createAnimationPath("autoPath2.txt",0.1);
>
> {...
> Defined the Pyramid
> ...
> }
>
> const osg::BoundingSphere& bs = pyramidGeode->getBound();
>
> float size = radius/bs.radius()*0.3f;
> osg::MatrixTransform* positioned = new osg::MatrixTransform;
> positioned->setDataVariance(osg::Object::STATIC);
> positioned->setMatrix(osg::Matrix::translate(-bs.center())*
> osg::Matrix::scale(size,size,size)*
>
> osg::Matrix::rotate(osg::inDegrees(-90.0f),0.0f,0.0f,1.0f));
>
> positioned->addChild(pyramidGeode);
>
> osg::PositionAttitudeTransform* xform = new
> osg::PositionAttitudeTransform;
> xform->setUpdateCallback(new
> osg::AnimationPathCallback(animationPath,0.0,1.0));
> xform->addChild(positioned);
>
> model->addChild(xform);
My animation is defined as follows:
> osg::AnimationPath* createAnimationPath(std::string filename,double deltatime)
> {
> std::ifstream infile;
> infile.open(filename.c_str(),std::ios::in);
> double time=0.0f;
>
> osg::AnimationPath* animationPath = new osg::AnimationPath;
> animationPath->setLoopMode(osg::AnimationPath::LOOP);
>
>
>
> while(infile.is_open() && !infile.eof())
> {
>
> double x,y,z,r,p,ya;
> infile >> x >> y >> z>> r>> p>>ya;
> osg::Vec3 position(x,y,z);
> osg::Quat rotation;
>
> rotation.makeRotate( osg::DegreesToRadians(r), osg::Vec3(-1,0,0),
> osg::DegreesToRadians(p), osg::Vec3(0,-1,0) ,
> osg::DegreesToRadians(ya), osg::Vec3(0,0,1) );
>
>
> animationPath->insert(time,osg::AnimationPath::ControlPoint(position,rotation));
> time += deltatime;
> }
>
> infile.close();
>
> return animationPath;
>
> }
But what this does is move the pyramid by X,Y,Z and rotate it by Roll,Pitch,Yaw
about the ORIGIN!
I want to rotate it around its peak and not the origin. Can you suggest any
modifications?
Thank you!
Cheers,
John
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=25432#25432
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