if this is your code (with all the comments) then here is what you should
do:
- forget about your osg::Camera* camera = new Camera; // there is already a
Camera attached to the View
- use view.getCamera()-setProjectionMatrixAsPerspective(45,1,1,1000);
- no need to attach any CameraManipulator if you want to set the view matrix
by your own (although that is the purpose of the CameraManipulator, to
change the view matrix - probably you do it this way when you get more
familiar with the code)
- in your loop you do
viewer.getView(0)-getCamera()-setViewMatrixAsLookAt(eye,center,up)
-Nick
On Wed, Dec 15, 2010 at 7:02 PM, Bart Jan Schuit osgfo...@tevs.eu wrote:
Hi,
I'm trying to setup some cameras without a manipulator. When I assign a
Trackballmanipulator on the vies, I get the cow projected on the screen. But
as soon as I manually setup the cameras, I get a completely black screen.
I extract eye, center and up from Tman (Trackballmanipulator) by
Tman-getMatrix().lookat(eye, center, up).
This gives some nice coordinates, but when I put these in a camera without
a manipulator like Tman, I just get a black screen. What am I doing wrong
here?
Code:
int main( int argc, char **argv )
{
// use an ArgumentParser object to manage the program arguments.
osg::ArgumentParser arguments(argc,argv);
osg::Group* scene = new osg::Group();
osg::Node* groundNode = NULL;
groundNode = osgDB::readNodeFile(cow.osg);
scene-addChild(groundNode);
osgViewer::CompositeViewer viewer(arguments);
if (arguments.read(-2))
{
// view one
{
osg::Vec3d eye = osg::Vec3d(0,0,250);
osg::Vec3d center = osg::Vec3d(0,0,250);
osg::Vec3d up = osg::Vec3d(0,0,-1);
osg::Quat rotation;
osg::Matrixd viewmat;
osg::Camera* camera = new osg::Camera;
osgViewer::View* view = new osgViewer::View;
view-setName(View one);
viewer.addView(view);
//camera-setProjectionMatrix( osg::Matrix::ortho2D(0,512,0,512) );
//not doing anything
//camera-setReferenceFrame( osg::Transform::ABSOLUTE_RF );
//camera-setViewMatrix( osg::Matrix::identity() );
view-setCameraManipulator(Tman);
//Tman-setAutoComputeHomePosition(false);
view-setUpViewOnSingleScreen(0);
view-setSceneData(scene);
//view-setCamera(camera);
}
// view two
{
osg::Matrixd viewmat;
osg::Camera* camera = new osg::Camera;
osgViewer::View* view = new osgViewer::View;
view-setName(View two);
viewer.addView(view);
view-setUpViewOnSingleScreen(1);
view-setSceneData(scene);
//view-setCamera(camera);
view-setCameraManipulator(Tman);
view-setName(right);
osg::Vec3d eye = osg::Vec3d(0,0,25);
osg::Vec3d center = osg::Vec3d(0,0,25);
osg::Vec3d up = osg::Vec3d(0,0,-1);
}
}
viewer.realize();
while(!viewer.done())
{
osg::Vec3d eye = osg::Vec3d(0,0,50);
osg::Vec3d center = osg::Vec3d(0,0,50);
osg::Vec3d up = osg::Vec3d(0,0,-1);
Tman-setHomePosition(eye,center,up); //not working. Doesn't
matter how I set eye, center etc.
viewer.frame();
}
}
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=34890#34890
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