David, We have the OsgIntersect working. What problems are you having with the example?
Chuck -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David Johansson Sent: Monday, June 26, 2006 10:17 AM To: osg users Subject: Re: [osg-users] BoundingBox & IntersectVisitor Hi Robert, thanks for the reply! Well, its kindof what i want. As of now im working with picking objects in the scenegraph. But eventually i want to be able to select objects inside of an boundingbox. Eg. user draws a box with the mouse, and selects all the objects inside it. I found a example of this at: http://www.openscenegraph.org/osgwiki/pmwiki.php/Tasks/OsgIntersect This is pretty much what i want to be done, find nodes/drawables inside a boundingbox. But, from what i can understand this code is nolonger developed or maintained. And i didn't manage to get the examples running. If i understand correctly the Polytope suggestion you gave me would only give me objects that are intersected. Wich means i wouldn't get objects inside it(?). Since there are functions like: /** Return true if this bounding box intersects the specified bounding box. */ bool intersects(const BoundingBox& bb) const /** Returns true if this bounding box contains the specified coordinate. */ inline bool contains(const Vec3& v) const On the boundingbox it shouldn't be to hard to check if any objects boundingbox is inside the "selected" boundingbox. I figured that there was a way to do this in a similar way as the Linesegment & intersectVisitor does. MVH David Johansson On 6/26/06, Robert Osfield <[EMAIL PROTECTED]> wrote: > Hi David, > > Not quite sure what you are after, is that you want to use a polytope > to intersect with a scene, rather than a line segmenet as > IntersectVisitor does? > > There is a spealized code in src/osgSim/SphereSegmenet.cpp does create > a osg::Polytope > and traversing throught the scene picking out what elements intersect > it. Perhaps this would be useful guide for you. > > BTW, a Polytope can be used to represent a bounding box, by building > it from 6 half space planes. > > > Robert. > > On 6/25/06, David Johansson <[EMAIL PROTECTED]> wrote: > > Hi All! > > > > I have been looking for a while now, but have not found, a way to use > > a BoundingBox and a IntersectVisitor. > > > > I'm not sure if it's currently implemeted, but instead of writing my > > own functions i thought i might just ask. > > As shown in some examples you can use a LineSegment and a > > IntersectVisitor to find node's (geodes) that intersect with a given > > line. Since i am using this to Select objects (sometimes very thin > > lines) with a mouse this does pose a problem. As you need to click on > > the exact pixel to select the object. > > So, i was thinking that maybe you could use a BoundingBox instead, and > > check if any object is inside. So, back to the question.. Is there a > > way to do this allready implemeted into OSG? > > > > Thanks in advance! > > > > MVH > > David Johansson > > _______________________________________________ > > osg-users mailing list > > [email protected] > > http://openscenegraph.net/mailman/listinfo/osg-users > > http://www.openscenegraph.org/ > > > _______________________________________________ > osg-users mailing list > [email protected] > http://openscenegraph.net/mailman/listinfo/osg-users > http://www.openscenegraph.org/ > _______________________________________________ osg-users mailing list [email protected] http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/ ---------------------------------------------------------------------- This e-mail, including any attached files, may contain confidential and privileged information for the sole use of the intended recipient. Any review, use, distribution, or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive information for the intended recipient), please contact the sender by reply e-mail and delete all copies of this message. _______________________________________________ osg-users mailing list [email protected] http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
