add
sphereGeode->getOrCreateStateSet()->setMode( GL_CULL_FACE,
osg::StateAttribute::ON );
peter
On Tue, Jun 17, 2008 at 1:24 PM, Juan Casanueva <[EMAIL PROTECTED]>
wrote:
>
> Hi there,
>
> I am having some problems with transparent objects. They have some
> artefacts (slices) depending on the view point.
> To illustrate the problem, I have done a simple example that draws a
> transparent red sphere with a box inside it.
> I have attached screenshots showing the strange "slices" appearing in the
> sphere.
> I must be missing something… any help would be appreaciated.
>
> Here is the code:
>
> #include <osg/Geode>
> #include <osg/ShapeDrawable>
> #include <osg/Material>
> #include <osgViewer/Viewer>
> #include <osgViewer/ViewerEventHandlers>
>
> int main( int argc, char **argv )
> {
> osgViewer::Viewer viewer;
> viewer.addEventHandler(new osgViewer::StatsHandler);
> viewer.addEventHandler(new osgViewer::WindowSizeHandler);
>
> osg::Group *root = new osg::Group;
>
> // transparent sphere
> osg::Geode *sphereGeode = new osg::Geode;
> sphereGeode->addDrawable(new osg::ShapeDrawable(new osg::Sphere(osg::
> Vec3(0.0f,0.0f,0.0f),40.0f)));
>
> osg::StateSet* pStateSet = sphereGeode->getOrCreateStateSet();
> pStateSet->setMode(GL_BLEND,osg::StateAttribute::ON);
> pStateSet->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
>
> osg::Material *pMat = new osg::Material;
> pMat->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4(1, 0, 0,
> 0.5));
> pMat->setAlpha(osg::Material::FRONT_AND_BACK, 0.5);
> sphereGeode->getOrCreateStateSet()->setAttributeAndModes(pMat, osg::
> StateAttribute::ON);
>
> root->addChild(sphereGeode);
>
> // box inside sphere
> osg::Geode *boxGeode = new osg::Geode;
> boxGeode->addDrawable(new osg::ShapeDrawable(new
> osg::Box(osg::Vec3(0.0f,0.0f,10.0f),10.0f)));
>
>
> root->addChild(boxGeode);
>
> viewer.setSceneData( root );
>
> return viewer.run();
> }
>
>
> Thanks
> Juan
>
> <<...>> <<...>>
>
> _______________________________________________
> osg-users mailing list
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> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
>
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