Hi Markus, Default LinesegmentIntersector is unable to handle intersections with lines and points. But PolytopeIntersector which will require a rectangle on screen (or a polytope in space) may do the work for you.
The OpenSceneGraph 3.0 Cookbook (Packt Publishing) introduces how to use custom intersector to select points in the last chapter. Unfortunately the whole chapter was removed at last because of page count limitation. But you can still find the source code from the Github repo and test it freely: https://github.com/xarray/osgRecipes/tree/master/cookbook/chapter10/ch10_07 Another way to do point selection effectively is to make use of the glReadPixels() function with depth component. You can then obtain the depth value(s) at your mouse point and compute real point coordinate when it is valid. Wang Rui 2012/10/1 Markus Ikeda <[email protected]>: > Hi, > > I'm new to OSG and I tried the osgkeyboardmouse example > > root/OpenSceneGraph/trunk/examples/osgkeyboardmouse/osgkeyboardmouse.cpp > > but I still couldn't manage to use the polytope intersector to select a > subset of points via mouseclick in a pointcloud. > > Did anybody have the same problem and solve it ? > > Thank you! > > Cheers, > Markus > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=50360#50360 > > > > > > _______________________________________________ > 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
