Re: [osg-users] OpenGL error 'invalid enumerant' after RenderBin::draw(, )
Hello Evan, I've written a very simple application which should simply display a sphere. The code compiles, but when the viewer runs, the sphere doesn't appear and I get the message: Warning: detected OpenGL error 'invalid enumerant' after RenderBin::draw(,) I have no idea what this means or how to fix it. I was able to compile and run successfully on a Linux system, but I've had no luck with Windows and Visual C++. Can anybody help me out? We will not be able to help much if you don't show your code, because what you describe is very simple and should work (at least as far as we can see from your description). If we see the code we might be able to tell you what's wrong. Also, have you looked at the OSG examples and the Getting Started Guide to make sure you're doing things right? J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OpenGL error 'invalid enumerant' after RenderBin::draw(, )
Skylark wrote:
Hello Evan,
We will not be able to help much if you don't show your code, because
what you describe is very simple and should work (at least as far as we
can see from your description). If we see the code we might be able to
tell you what's wrong.
Also, have you looked at the OSG examples and the Getting Started Guide
to make sure you're doing things right?
J-S
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Post generated by Mail2Forum
Hello,
Yes, I followed the startup guide to get OSG working on my computer. This is
the simple code that I was trying:
Code:
#include osg/Group
#include osg/LightSource
#include osg/ShapeDrawable
#include osgViewer/Viewer
using namespace osg;
// main function
int main()
{
// create the root node of the scene graph
ref_ptrGroup root = new Group;
// create a node to the geometry of a spherical object
ref_ptrGeode ballNode = new Geode;
ballNode-addDrawable(new ShapeDrawable(new Sphere));
// create a distant light, with 0 for the homogeneous coord
Vec4 lightDirection(1, -1, 1, 0);
ref_ptrLightSource ls = new LightSource;
ls-getLight()-setPosition(lightDirection);
// set the intensity properties for the light
ls-getLight()-setAmbient(Vec4(0.2, 0.2, 0.2, 1.0));
ls-getLight()-setDiffuse(Vec4(1.0, 1.0, 0.7, 1.0));
ls-getLight()-setSpecular(Vec4(1.0, 0, 0, 1.0));
// assemble the node hierarchy
root-addChild(ls.get());
root-addChild(ballNode.get());
// create the viewer helper object
osgViewer::Viewer viewer;
viewer.setSceneData(root.get());
viewer.realize();
while( !viewer.done() )
{
viewer.frame();
}
return 0;
}
Thanks in advance for your help.
~Evan
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Re: [osg-users] OpenGL error 'invalid enumerant' after RenderBin::draw(, )
Hello Evan, The default viewer camera position is at (0,0,0), which turns out to be inside your sphere. So you just see the inside of your sphere (not a very interesting view point to be sure! :-) ). You have used the while(!viewer.done()) viewer.frame() method of coding the main loop, and so no camera manipulator is created automatically by the viewer, and you don't add any camera manipulator yourself, so you will need to set the viewer camera's view matrix yourself to be able to see the object. Add viewer.getCamera()-setViewMatrixAsLookAt(osg::Vec3(0,-10,0), osg::Vec3(0,0,0), osg::Vec3(0,0,1)); just before your frame loop to see the object. You can also call this method at different times inside the frame loop (or in callbacks) if you want to animate the camera's position. You could also opt to add a camera manipulator, then you would add viewer.setCameraManipulator(new osgGA::TrackballManipulator); before your frame loop, for example. The camera manipulator will center on your scene's bounds on the first frame, so you will see the whole scene and will be able to move/rotate the camera around. With either of these changes I can see the sphere just fine (and with the correct yellowish lighting as you've set in your light source's diffuse light color). Of course without a camera manipulator you won't be able to rotate the camera with the mouse (unless you code that yourself in an event handler that sets the camera's view matrix, for example). As for your OpenGL messages, I don't get any of those when running your code. They could be related to your driver. These messages are sometimes false positives, meaning they may be shown even if nothing is wrong. I would recommend checking if there is an updated driver for your video card and see if they go away. Hope this helps, J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] OpenGL error 'invalid enumerant' after RenderBin::draw(, )
Hi, I've had some problems getting my OSG applications to render properly. I'm using Microsoft Visual C++ 2010 Express. I've written a very simple application which should simply display a sphere. The code compiles, but when the viewer runs, the sphere doesn't appear and I get the message: Warning: detected OpenGL error 'invalid enumerant' after RenderBin::draw(,) I have no idea what this means or how to fix it. I was able to compile and run successfully on a Linux system, but I've had no luck with Windows and Visual C++. Can anybody help me out? ... Thank you! Cheers, Evan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=34950#34950 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
