Unfortunalety there is no feature "throw" feature. My class inherits from
osgGA::GUIEventHandler and there is no setAllowThrow implemented, as far as I
know.
Here is (part of) my actual mouse dragging code:
Code:
bool CameraHandler::handle(const osgGA::GUIEventAdapter & ea,
osgGA::GUIActionAdapter & us)
{
osgViewer::View* viewer = dynamic_cast<osgViewer::View*>(&us);
osg::Matrixd viewMatrix = viewer->getCamera()->getViewMatrix();
osg::Vec3d translation = viewMatrix.getTrans();
osg::Matrixd rotationX = osg::Matrix::rotate(deltaX * 0.5,
osg::Y_AXIS);
osg::Matrixd rotationY = osg::Matrix::rotate(-deltaY * 0.5,
osg::X_AXIS);
osg::Matrixd preTrans = osg::Matrix::identity();
osg::Matrixd postTrans = osg::Matrix::identity();
osg::Vec3d bsCenter = osg::Vec3d(137.69, 284.17, 3305.0); //
scene is (almost) static
m_rotationPoint = osg::Vec3(0.0, 0.0 , 0.0); // good rotation
point for
m_rotationPoint = translation - bsCenter; // good rotation
point for
preTrans.setTrans(-m_rotationPoint);
postTrans.setTrans(m_rotationPoint);
viewMatrix = viewMatrix * (preTrans * rotationX * rotationY *
postTrans);
viewer->getCamera()->setViewMatrix(viewMatrix);
// ensure fixed point to look at
osg::Vec3d eye, center, up;
viewer->getCamera()->getViewMatrixAsLookAt(eye, center, up);
if (focusPointFlag)
{
viewer->getCamera()->setViewMatrixAsLookAt(eye, bsCenter ,
up);
}
return true;
}
And if I am zooming in, sometimes the effect gets worse and the camera is
hardly to control. Maybe there is an error in my rotation setup?
Thank you!
Cheers
Daniel Neos
cbuchner1 wrote:
> Could it be that the "throw" feature of the camera manipulator is responsible
> for the roll?
>
> If so, try disabling it.
>
>
> Also, post source code if you want specific help with a specific issue in
> your implementation.
>
>
> Christian
>
>
>
>
Code:
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=67128#67128
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