Hi Umit, You shouldn't mix SceneView settings of near/far, just set the CullSettings on the Camera itself, these will be probagated automatically to any SceneView's used internally by osgViewer for rendering.
Robert. On Fri, May 9, 2008 at 3:28 PM, ümit uzun <[EMAIL PROTECTED]> wrote: > > Hi Robert; > > I have tried all your advices and osg::Fog effect works the invisibility > problem. I try to other ; > > 1 - changing setNearFarRatio' value, > > 2 - adding > viewer.getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR > ); pattern and > > 3 - osg::CullStack::CullingMode cullingMode = sceneview->getCullingMode(); > cullingMode &= ~ ( osg::CullStack::SMALL_FEATURE_CULLING ); > sceneview->setCullingMode( cullingMode ); > // You can also control the size of the screen space that is used to cull > // small features with > sceneview->setSmallFeatureCullingPixelSize( minimumSize ); > > but any of them didn't help me. So why the osg::fog effect fix the problem? > I guess; it reduce the detail of scene and so this has resulted of protecting > the models visibility. Does it could be right ? > > Thanks so much Robert :) > > ÜMİT UZUN > > ---------------------------------------- >> Date: Wed, 7 May 2008 09:38:08 +0100 >> From: [EMAIL PROTECTED] >> To: [email protected] >> Subject: Re: [osg-users] Aircraft Getting Invisible ? >> >> Hi Umit, >> >> I'd guess that you are probably coming across a near plane clipping >> issue, rather than a culling issue. Unfortunately its easy to confuse >> clipping with culling when you just see disappearing, but its too very >> different mechanisms at play so its important to work out whether it >> is clipping or culling that is at play. The way to know is study how >> the object disappears - does it slowly get eaten away or does it just >> pop out of existance - the former will be near plane clipping down on >> the GPU, the later most likely culling. >> >> Both clipping and culling problems can be caused by incorrect bounding >> volume computations - if your plane was a custom drawable or you'd >> just a shader to modify its geometry then this might be a candidate. >> If you are using standard osg::Geometry then its very unlikely that >> culling as at fault as the OSG's native codes for computing bounding >> volumes and doing cull testing are very well established and tested. >> >> My guess is that most likely you have an issue with near plane >> clipping, and if you have a very large model extents this can be very >> common - as the far plane will be pushed out so far. The OSG does >> have support for cluster culling, and this will be used by default in >> geocentric databases built by VPB, this will cull out tiles beyond the >> horizon line and pull in the max far distance, but it doesn't solve >> all the potential problems as the furtherest tile can still be a long >> way out. If you want to pull it in further you could manually >> control it but then you'll need to make sure you use glFog/osg::Fog on >> the terrain to make sure that you can only see up to a set maximum >> distanace. If you use this trick then disabling the compute of near >> far will be required. You should be able to enable the far clipping >> plane as well. >> >> The other thing you can do is to reduce the NearFarRatio by setting >> setNearFarRatio to something lower than it's default of 0.0005f ( see >> src/osg/CullSettings.cpp's setDefaults() method where it's set.) >> >> Robert. >> >> Robert. >> >> 2008/5/5 ümit uzun : >>> >>> Hi all, >>> >>> I have an aircraft. I resize it and add scene on the earth but it get >>> invisible when I resized much smaller like that, >>> >>> float size = 0.0005f / mAircraftModel.get( )->getBound( ).radius( ); >>> >>> mAircraftTransform->setDataVariance( osg::Object::STATIC ); >>> mAircraftTransform->setMatrix( osg::Matrix::scale( size, size, size ) * >>> osg::Matrix::rotate( osg::DegreesToRadians( 90.0f ), 1.0f, 0.0f, 0.0f ) * >>> osg::Matrix::rotate( osg::DegreesToRadians( -90.0f ), 0.0f, 0.0f, 1.0f ) * >>> osg::Matrix::rotate( osg::DegreesToRadians( 5.0f ), 1.0f, 0.0f, 0.0f ) ); >>> >>> Earth size is, >>> >>> float size = 2000.0f / mTerrainModel.get( )->getBound( ).radius( ); >>> >>> mTerrainTransform->setDataVariance( osg::Object::STATIC ); >>> mTerrainTransform->setMatrix( osg::Matrix::scale( size, size, size ) ); >>> >>> What can I do for protect the aircraft visibility? >>> >>> Thanks so much! >>> >>> >>> ÜMİT UZUN >>> >>> _________________________________________________________________ >>> Şimdi aileye katılmanın tam zamanı - Yeni nesil Ücretsiz Windows Live >>> Hizmetlerini şimdi edinin! >>> http://get.live.com >>> _______________________________________________ >>> osg-users mailing list >>> [email protected] >>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >>> >>> >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _________________________________________________________________ > Şimdi aileye katılmanın tam zamanı - Yeni nesil Ücretsiz Windows Live > Hizmetlerini şimdi edinin! > http://get.live.com > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
