Hi Vincent,
I used to use a clearnode a while back..
All I do now with my mixed OpenGL and OSG is the following at setup..
All I do is the following..
sceneViewer->getCamera()->setClearMask(0);
You can put various GL_DEPTH_BUFFER_BIT, and colour buffer bits and so
on in the setClearMask to get your required level of clearing, or not..
Hope that helps,
Stephen.
On Jan 31, 2008, at 11:41 AM, Vincent wrote:
>
> I thought I was able to do this years ago and had it work alright,
> so I
> think I'm forgetting something...hopefully someone can help.
>
> I need to have my clearcolor and clear masks set outside of osg
> glClear(...). If I set OSG;s viewport smaller than my main
> viewport, I
> can still see my scene is getting rendered behind OSG. Also, when I
> use the
> clearnode its setting OSG background to black(this is probably the
> clue of
> what I'm doing wrong). All I'm doing right now is rendering the
> cow....nothing else. I am using the clearnode as shown below.
>
> /////////////This here is how I'm creating the viewer/////////////
> sceneViewer_[0] = new osgUtil::SceneView();
> sceneViewer_[0]->setFrameStamp( frameStamp.get() );
> sceneViewer_[0]->setDefaults( osgUtil::SceneView::STANDARD_SETTINGS
> );
> sceneViewer_[0]->setComputeNearFarMode(
> osgUtil::CullVisitor::DO_NOT_COMPUTE_NEAR_FAR );
>
>
> ////////////This here is how I'm adding the
> clearnode /////////////////////
>
> osg::Node *loadedModel =
> sgDB::readNodeFile("C:/Debug/cow.osg");
>
> if (!loadedModel)
> {
> OutputDebugString("failed loading model");
> system("pause");
> }
>
> osg::ClearNode *clear_node = new osg::ClearNode();
> clear_node->setRequiresClear( false );
> osg::StateSet *stateset = new osg::StateSet();
> stateset->setMode( GL_RESCALE_NORMAL,
> osg::StateAttribute::ON );
> osg::PositionAttitudeTransform *transform0 = new
> osg::PositionAttitudeTransform;
> transform0->setStateSet(stateset);
> transform0->addChild( loadedModel );
> transform0->setPosition( osg::Vec3(0,0,0 ) );
> clear_node->addChild( transform0 );
> sceneViewer_[0]->setSceneData( clear_node );
>
>
> ///////////////This here is how I'm rendering/////////////
> glPushAttrib( GL_ALL_ATTRIB_BITS );
> glMatrixMode( GL_PROJECTION );
> glPushMatrix();
> glMatrixMode( GL_TEXTURE );
> glPushMatrix();
> glMatrixMode( GL_MODELVIEW );
> glPushMatrix();
>
> sceneViewer_[0]->setViewport(pCamera->viewParams[0],
> pCamera->viewParams[1], pCamera->viewParams[2], pCamera-
> >viewParams[3]);
>
> GLdouble glMat[16];
> osg::Matrixd osgMat;
> glGetDoublev( GL_PROJECTION_MATRIX, glMat );
> osgMat.set( glMat );
> sceneViewer_[0]->getProjectionMatrix().set( osgMat );
>
>
> glGetDoublev( GL_MODELVIEW_MATRIX, glMat );
> osgMat.set( glMat );
> sceneViewer_[0]->getViewMatrix().set( osgMat );
>
>
> sceneViewer_[0]->update ();
> sceneViewer_[0]->cull ();
> sceneViewer_[0]->draw();
>
> glMatrixMode(GL_MODELVIEW);
> glPopMatrix();
>
> glMatrixMode(GL_TEXTURE);
> glPopMatrix();
> glMatrixMode(GL_PROJECTION);
> glPopMatrix();
> glPopAttrib()
>
>
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> 9:29 AM
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