Re: [osg-users] Draw line in 3D screen
Hi, Thks Robert and Shayne I solve my problem with your direction. Cheers, Lalit -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44767#44767 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Draw line in 3D screen
Dear Shayne
I use polytope to pick the 3D coordinate of data.
……..
osg::ref_ptr picker;
picker = new osgUtil::PolytopeIntersector(osgUtil::Intersector::WINDOW, x-w,
y-h, x+w, y+h );
osgUtil::IntersectionVisitor iv( picker );
viewer->getCamera()->accept( iv );
if(picker->containsIntersections())
{
………
}
I picked first point in 3D data and similarly the second point. The primitive
is set for these two points as LINES and a line gets drawn on screen.
osg::ref_ptr points = new osg::Vec3Array;
osg::ref_ptr color = new osg::Vec4Array;
osg::ref_ptr geometry( new osg::Geometry);
points->push_back(..get first x,y,z using osgUtil::PolytopeIntersector()…);
points->push_back(..get second x,y,z using osgUtil::PolytopeIntersector()…);
color->push_back(osg::Vec4(1.0,0.0,0.0,1.0));
geometry ->setVertexArray(points.get());
geometry ->setColorArray(color.get());
geometry ->setColorBinding(osg::Geometry::BIND_OVERALL);
geometry ->addPrimitiveSet(new osg::DrawArrays(GL_LINES,0, points->size()));
I cannot use polytope in the area where there are no data points.
I think my line drawing procedure is wrong and this is why I am not able to do
so in those areas where there are no points.
A line can be anywhere, not necessarily through points, in this space for some
applications.
Thank you!
Cheers,
Lalit
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Re: [osg-users] Draw line in 3D screen
Dear Robert: Thanks for input. I am trying to re-phrase my question. I have loaded a 3D data (X,Y,Z) on screen and can see these points as in screenshot_1. Also, I can, using mouse, draw line through these points (also shown.) However, if I want to draw a line as shown in screenshot_2, I am not able to do this, as this line does not passes through any loaded data. What can be the procedure to draw these lines using mouse which are not passing through any data point. Thank you! Cheers, Lalit -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44707#44707 Attachments: http://forum.openscenegraph.org//files/screenshot_2_123.jpg http://forum.openscenegraph.org//files/screenshot_1_443.jpg ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] setUseVertexBufferObjects(..) create problem in osg 3.0.1
Hi, I have written a program using visual studio 2008 and osg 2.8.5. In this program I was using geometry->setUseDisplayList( false ); //Disable display lists geometry->setUseVertexBufferObjects( true ); //Enable VBO But when I switch higher version of visual studio (2010) and osg ( 3.0.1), it create problem. When I comment above line program works fine. I am using graphics card: NVIDIA GeoForce 6800 XT (Microsoft Corporation - WDDM) Is that problem due to graphics card? Thank you! Cheers, Lalit -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44583#44583 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [osgPlugins] Problem in loading Shape file
Thanks ulrich for your answer I followed your instruction and now program is not crashing. But in some file it does not load the complete shape file. I have attached here a shape file and its snapshot (with complete view). Please could you help. Thank you! Cheers, Lalit -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44461#44461 Attachments: http://forum.openscenegraph.org//files/completeview_836.jpg http://forum.openscenegraph.org//files/testshapefile_371.rar ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] [osgPlugins] Problem in loading Shape file
Hi,
I am loading *.shp file in my program. In some files program works fine (mostly
shape file with lines) but in some other files program crashed.
My code is :
...
osg::Geode* geode = dynamic_cast < osg::Geode* >
(osgDB::readNodeFile("Test.shp"));
osg::ref_ptr < osg::Group > group(new osg::Group);
osg::ref_ptr < osgViewer::Viewer > mViewer(new osgViewer::Viewer);
group->addChild(geode);
mViewer->setSceneData(group.get());
mViewer->run();
...
Is it correct way?
I am using WindowXp 32 bit os, osg 2.8.5 prebuilt library.
Thank you!
Cheers,
Lalit
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[osg-users] Draw line in 3D screen
Hi, I am loading a large number of 3D points (X, Y, Z) on OSG. I want to draw line on screen not necessarily passing through loaded points. I am using osgUtil::PolytopeIntersector but it draws lines which essentially pass through loaded points. What can be done to draw line by movement of mouse dynamically anywhere in screen, i.e. could have its nodes on the loaded points and as well on the area where there are no loaded points. Thank you! Cheers, Lalit -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44191#44191 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Flush event stack
Thanks for reply, I have some another question. Using osgUtil::PolytopeIntersector we get the x, y, and z coordinates at current mouse position. Can I do opposite of it, means if I have x, y and z coordinate then, can I calculate the screen coordinate. Actually I have to find points around a given coordinate. Or is there another method to find the nearest points around a given point (range is also given) Thank you! Cheers, Lalit -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=38919#38919 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Flush event stack
Hello friends, I am working on 3-D point data and using osgUtil::PolytopeIntersector to get the x, y, and z coordinates on mouse move event and show it on status bar. But my program becomes very slow. I had make a class: class CMousePickHandle : public osgGA::GUIEventHandler and working on osg version 2.8.2 . Is there any method for flush the event stack? Thank you! Cheers, Lalit -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=38906#38906 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Problem in opening multiple files while using VBO
Hi, I made a MDI application using MFC with the help of OSGMDI project, which displays the point data. I am using VBO in my application using these two lines: geometry->setUseDisplayList( false ); //Disable display lists geometry->setUseVertexBufferObjects( true ); //Enable VBO Now the problem is, when I open a file the application works well and on close the child window it releases the memory. But when I open another file without closing the main window, it breaks. But when I comment these two lines then program working well for multiple files but it becomes slow. I can’t understand the problem please help me. Thank you! Cheers, Lalit -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=37359#37359 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Identify whether Geode is inside the viewport or not...
Hi, I am working with LiDAR data. Its a huge data containing the information of X, Y, Z co-ordinates. I have divided this data into spatial blocks and making a Geode for every block. I want to increase the density of point cloud as the user zoom in the data. I want to know how can I identify that which Geode or block is inside or outside the viewport. Thank you! Cheers, Lalit -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=33861#33861 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Disable the Mouse default event in osg
Hi,
... Thanks for reply..
If i comment the manipulator then data is not displaying. I m using code...
...
...
lasGeometry->setVertexArray( lasVertices);
lasGeometry->setColorArray(colors);
lasGeometry->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
lasGeometry->addPrimitiveSet(lasPrimitive);
root->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
//viewer.setCameraManipulator(new osgGA::TrackballManipulator());
viewer.setSceneData( root );
viewer.addEventHandler(new osgViewer::StatsHandler);
viewer.addEventHandler(new osgViewer::WindowSizeHandler);
viewer.realize();
while( !viewer.done() )
{
viewer.frame();
}
...
.
And is there any osg functions that i can directly for rotate pan and zoom
buttons.
Thank you!
Cheers,
Lalit
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[osg-users] Disable the Mouse default event in osg
Hi, ... I am new in OpenSceneGraph. I want to disable the mouse event and use these event (Rotate, Zoom, Pan ) in separate buttons. Thank you! Cheers, Lalit Manchwari -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=33198#33198 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
