Hi,
ok, I made some screenshots, which I will explain in detail.
First I show you the structure of the graph. This is how I set up the graph:
http://getwww.uni-paderborn.de/~kutter/structure.jpg
<http://getwww.uni-paderborn.de/%7Ekutter/structure.jpg>
As you can see, the camera and the coordinate system axes are in a 2nd
subgraph.
Now, some screenshot from the application:
First, what you see in the main window is our lab with a robot at
(0,0,0). The small viewport bottom left is the view from the 2nd camera.
http://getwww.uni-paderborn.de/~kutter/scene1.jpg
<http://getwww.uni-paderborn.de/%7Ekutter/scene1.jpg>
As you can see in the next image, the coordinate system axes, which are
a child of the 2nd camera, are not shown in the main viewport but in the
viewport of the 2nd camera. But the main scene (lab with robot) is also
shown in the 2nd viewport. I don't know why.
http://getwww.uni-paderborn.de/~kutter/scene2.jpg
<http://getwww.uni-paderborn.de/%7Ekutter/scene2.jpg>
I used GL_DEPTH_BUFFER_BIT to ensure that the background of the 2nd
viewport is not visible, so that the main scene is visible through the
2nd viewport, as you can see here.
http://getwww.uni-paderborn.de/~kutter/scene3.jpg
<http://getwww.uni-paderborn.de/%7Ekutter/scene3.jpg>
Now I want only the coordinate system axes to be shown in the 2nd viewport.
I hope you can help me now. And I hope you can see the images.
regards,
Oliver
<http://getwww.uni-paderborn.de/%7Ekutter/scene1.jpg>
<http://getwww.uni-paderborn.de/%7Ekutter/scene2.jpg>
<http://getwww.uni-paderborn.de/%7Ekutter/scene3.jpg>
<http://getwww.uni-paderborn.de/%7Ekutter/structure.jpg>
Robert Osfield schrieb:
Hi Oliver,
On Tue, Apr 8, 2008 at 1:13 PM, Oliver Kutter <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Hi,
isn't there anybody, who can answer my question (see below)?
I've just re-read you post and can't think of anything to say - as I
really don't know
what specifically is amiss. I'd guess others don't know either.
Try providing a screen shot to tell us what looks wrong then we might
be able to help you.
Robert.
regards
Oliver
Oliver Kutter schrieb:
Hi guys,
I have a question concerning the openscenegraph example "osghud".
I have a similar scene like this example except that I don't want
to display hud text. Instead I want to render some small
coordinate system axes like the ones in 3d studio max in the left
bottom corner.
I still use openscenegraph 1.2, but I think this is not important
for my problem.
Now my graph looks like this: I have a sceneview with a camera, a
root node and the main scene as a child of the root node.
Now I constructed my stuff like the osghud example: I added a new
camera to the root node as a new subgraph and then I added my
coordinates system axes model as a child to that camera so that
the axes and the main scene are not connected.
I set up the viewport of that camera (2nd viewport) to the left
bottom corner with size (100,100) similar to 3d studio max.
Finally, my axes are displayed in the 2nd viewport, but not in
the main scene. That is correct so far.
Now my problem is that not only the axes but also the main scene
is displayed in the 2nd viewport. This shouldn't be like that
because the main scene is not a child of the 2nd camera.
What am I doing wrong?
These are my parameters which I set to the camera:
osg::ref_ptr<osg::Node> _axes =
osgDB::readNodeFile("../data/osg/coordinate_axes.osg");
_camera->setProjectionMatrix(osg::Matrix::perspective(50.0, 1,
0.1, 10000.0));
_camera->setViewport(0,0,100,100);
_camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
_camera->setRenderOrder(osg::CameraNode::POST_RENDER);
_camera->setClearMask(GL_DEPTH_BUFFER_BIT);
_camera->addChild(_axes.get());
_root->addChild(_camera.get());
best regards,
Oliver
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