hi:group
how to set texture coordinates in osg shader?
I want to set texture coordinates to gl_Coordinates[0],how can I? thanks！
At 2014-10-07 09:14:55, [email protected] wrote:
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>Today's Topics:
>
> 1. Re: How do I adapt the osgViewer::Viewer in order to have my
> model in fullscreen mode? (Filipe P)
> 2. Re: LineSegmentIntersector bug? (weijianggood)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Tue, 07 Oct 2014 00:24:17 +0200
>From: "Filipe P" <[email protected]>
>To: [email protected]
>Subject: Re: [osg-users] How do I adapt the osgViewer::Viewer in order
> to have my model in fullscreen mode?
>Message-ID: <[email protected]>
>Content-Type: text/plain; charset=UTF-8
>
>Hi Robert,
>thanks for your reply.
>
>I guess it should be the setUpViewOnSingleScreen() call.
>Unfortunately, the result was the same.
>
>Could you please give me an example or hints that demonstrate a fullscreen
>model or image?
>
>Taking this problem, all the evaluation that I'm doing with OSG is going very
>well.
>I'm happy with the performance of this scene graph.
>
>Thanks in advanced.
>
>Best regards,
>Filipe
>
>------------------
>Read this topic online here:
>http://forum.openscenegraph.org/viewtopic.php?p=61255#61255
>
>
>
>
>
>
>
>------------------------------
>
>Message: 2
>Date: Tue, 7 Oct 2014 09:15:28 +0800
>From: weijianggood <[email protected]>
>To: osg-users <[email protected]>
>Subject: Re: [osg-users] LineSegmentIntersector bug?
>Message-ID: <[email protected]>
>Content-Type: text/plain; charset="utf-8"
>
>Hello, Robert,
>
>Thank you for the suggestion.
>Currently, I am using osg3.0.1, intersector does not have the function
>"setPrecisionHint".
>So I download the newest version of osg from svn, then compile it.
>
>Finally,
>I add the following line into my test code:
>intersector->setPrecisionHint(osgUtil::Intersector::PrecisionHint::USE_DOUBLE_CALCULATIONS);
>
>It worked. Woooooo!
>Thanks again.
>
>Rubby
>
>
>
>
>
>
>
>
>From: Robert Osfield
>Date: 2014-10-06 16:22
>To: OpenSceneGraph Users
>Subject: Re: [osg-users] LineSegmentIntersector bug?
>HI ? Could you sign your post so we know how to address you :-)
>
>
>From the description of the problem it looks likely to be a precision issue
>where the line segment aligns right along the edge between two triangles with
>neither triangle passing the test.
>
>
>In the svn/trunk version of the OSG there is a
>IntersectionVisitor::setPrecisionHint(PrecisionHint hint) method that you can
>use to hint to the intersectors to use double maths. The
>LineSegmentIntersector supports this.
>
>
>Could you try this out to see if it helps?
>
>Robert.
>
>
>
>On 5 October 2014 09:51, weijianggood <[email protected]> wrote:
>
>
>Hi,
>When i use LineSegmentIntersector in the following code.
>there must be 8 lines. but after I run the code, only 7 lines exist.
>
>
>
>int main( int argc, char** argv ){
>
> float height = 5.f;
>
> osg::ref_ptr<osg::TessellationHints> hints;
> hints = new osg::TessellationHints;
> hints->setDetailRatio(0.5f);
> hints->setCreateBody(true);
> hints->setCreateBottom(false);
> hints->setCreateTop(false);
> osg::ref_ptr<osg::Geode> mynode = new osg::Geode;
> osg::ref_ptr<osg::ShapeDrawable> drawable = new osg::ShapeDrawable(new
> osg::Cylinder(osg::Vec3(0.0f,0.0f,0.0f),1.0f,height),hints);
> osg::ref_ptr<osg::ShapeDrawable> drawable2 = new
> osg::ShapeDrawable(new
> osg::Cylinder(osg::Vec3(0.0f,0.0f,0.0f),4.0f,height),hints);
> mynode->addDrawable(drawable.get()); // geom.get() or gemo.
> both are ok.
> mynode->addDrawable(drawable2.get());
>
> osg::ref_ptr<osg::Group> root = new osg::Group;
> root->addChild(mynode.get() );
> float angle = 0.0;
> float angleDelta = 2.0f*osg::PI/8;
>
> for(int i=0; i<8;i++){
> float c = cosf(angle);
> float s = sinf(angle);
> osg::ref_ptr<osgUtil::LineSegmentIntersector> intersector =
> new osgUtil::LineSegmentIntersector( osg::Vec3(0.0f,0.0f,0.0f),
> osg::Vec3(10.0f*c,10.0f*s,0.0f) );
>
> osgUtil::IntersectionVisitor iv( intersector.get() );
> mynode->accept( iv );
>
> if ( intersector->containsIntersections() )
> {
> osgUtil::LineSegmentIntersector::Intersections
> &intersections =
> intersector->getIntersections();
> std::cout <<"intersection size
> "<<intersections.size()<<std::endl;
>
> osg::ref_ptr<osg::Geode> geode=new osg::Geode;
> osg::ref_ptr<osg::Geometry> geom=new osg::Geometry;
> osg::ref_ptr<osg::Vec3Array> v3a=new osg::Vec3Array;
> osg::ref_ptr<osg::Vec4Array> colors = new
> osg::Vec4Array;
> colors->push_back( osg::Vec4(1.0, 0.0, 0.0, 1.0) );
>
>
> osgUtil::LineSegmentIntersector::Intersections::iterator itr;
> for ( itr = intersections.begin(); itr !=
> intersections.end(); ++itr ) {
> std::cout <<" X" <<
> itr->getWorldIntersectPoint().x()
> << " Y" <<
> itr->getWorldIntersectPoint().y()
> << " Z" <<
> itr->getWorldIntersectPoint().z();
> if(itr == intersections.begin())
> v3a->push_back(
> itr->getWorldIntersectPoint());
>
> }
> itr--;
> v3a->push_back( itr->getWorldIntersectPoint());
> std::cout<<std::endl;
> geom->setVertexArray(v3a);
> geom->setColorArray(colors.get() );
> geom->setColorBinding(osg::Geometry::BIND_OVERALL);
> for(int k=0; k<v3a->size(); k++){
> std::cout<<"vectex: "<<v3a->at(k).x()<<"
> "<<v3a->at(k).y()<<" "<<v3a->at(k).z();
> }
> std::cout<<std::endl;
> geom->addPrimitiveSet(new
> osg::DrawArrays(osg::PrimitiveSet::LINES,0,v3a->size()));
> geode->addDrawable(geom);
> root->addChild(geode);
> }else{
> std::cout<<"no intersection for i="<<i<<std::endl;
> std::cout<<"x "<<intersector->getStart().x()<<" y
> "<<intersector->getStart().y()<<" z "<<intersector->getStart().z()<<std::endl;
> std::cout<<"x "<<intersector->getEnd().x()<<" y
> "<<intersector->getEnd().y()<<" z "<<intersector->getEnd().z()<<std::endl;
> }
> angle+=angleDelta;
> }
> osgViewer::Viewer viewer;
> viewer.setSceneData(root.get());
> viewer.addEventHandler(new osgViewer::WindowSizeHandler);
> return viewer.run();
>
>}
>
>Thanks.
>
>
>
>
>
>
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