Re: [osg-users] Setting modelview matrix with viewer.getCamera()-setViewMatrix(modelViewMatrix) not working
Hi, The problem seemed to be twofold: * I was first using OSG 2.8.3, for which viewer.getCamera()-setViewMatrix(modelViewMatrix) required that modelViewMatrix were a cv::Matrixd. This is not the case with 3.0.1, which works with cv::Matrix too. * Like filip suggested, I used viewer.getCameraManipulator()-setByMatrix(modelViewMatrix) in the callback. It worked. I still have some registration glitches in the modeview matrix compared to my desired result, but maybe my original modelview matrix is wrong. * I tried Paul's solution with both getCamera()-setViewMatrix() and getCameraManipulator()-setByMatrix(), but I wasn't able to reproduce the desired result (that's the solution in the Quickstart guide anyway, so I guess I may be missing something). Thank you! Cheers, Juan Herrera -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44125#44125 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Setting modelview matrix with viewer.getCamera()-setViewMatrix(modelViewMatrix) not working
From the Viewer header file...
/** Execute a main frame loop.
* Equivalent to while (!viewer.done()) viewer.frame();
* Also calls realize() if the viewer is not already realized,
* and installs trackball manipulator if one is not already assigned.
*/
virtual int run();
If you don't want a TrackballManipulator, you'll need to *not* use
Viewer::run().
-Paul
On 11/28/2011 9:35 PM, Juan Fernando Herrera J. wrote:
Hi,
I want to set the modelview matrix with
viewer.getCamera()-setViewMatrix(modelViewMatrix) like in the
following code:
int main(int argc, char **argv)
{
osgViewer::Viewer viewer;
osg::Node* rootNode = createRootNode();
viewer.setSceneData(rootNode);
return viewer.run();
}
Later, in an osg::NodeCallback, I perform:
viewer.getCamera()-setViewMatrix(modelViewMatrix);
But the modelview matrix isn't modified at all.
On the other hand,
viewer.getCamera()-setProjectionMatrix(projectionMatrix) seems to
work.
What should I do to the viewer in order for setViewMatrix() to work?
Thank you!
Cheers,
Juan
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--
-Paul Martz Skew Matrix Software
http://www.skew-matrix.com/
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Re: [osg-users] Setting modelview matrix with viewer.getCamera()-setViewMatrix(modelViewMatrix) not working
You could also prevent the trackballmanipulator from being created and used by doing something like this: Code: osg::Camera* cam = viewer.getCamera(); cam-setAllowEventFocus(false); // Prevent the manipulator being used and taking over -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44126#44126 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Setting modelview matrix with viewer.getCamera()-setViewMatrix(modelViewMatrix) not working
Hi,
I want to set the modelview matrix with
viewer.getCamera()-setViewMatrix(modelViewMatrix) like in the
following code:
int main(int argc, char **argv)
{
osgViewer::Viewer viewer;
osg::Node* rootNode = createRootNode();
viewer.setSceneData(rootNode);
return viewer.run();
}
Later, in an osg::NodeCallback, I perform:
viewer.getCamera()-setViewMatrix(modelViewMatrix);
But the modelview matrix isn't modified at all.
On the other hand,
viewer.getCamera()-setProjectionMatrix(projectionMatrix) seems to
work.
What should I do to the viewer in order for setViewMatrix() to work?
Thank you!
Cheers,
Juan
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Re: [osg-users] Setting modelview matrix with viewer.getCamera()-setViewMatrix(modelViewMatrix) not working
Hi,
This might be your problem:
If you use CameraManipulator (for example TrackballManipulator), it will
overwrite your ViewMatrix every frame ... see Viewer.cpp @1040
Code:
if (_cameraManipulator.valid())
{
setFusionDistance( getCameraManipulator()-getFusionDistanceMode(),
getCameraManipulator()-getFusionDistanceValue() );
_camera-setViewMatrix(_cameraManipulator-getInverseMatrix());
}
Cheers,
Filip
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Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=44087#44087
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