Paul Martz writes: > Jean-Sébastien Guay wrote: >> Hi Daniele, Alberto, >> >>> Assuming that no transformation nodes exist in the graph describing your >>> node, you can write a node visitor that joins all the bounding boxes of >>> every geode. >>> >>> Else you'll need to modify every bounding box by its parent transforms >>> in order to join them. >> >> Actually you don't need to write this, it's so common that it exists >> in OSG already: osg::ComputeBoundsVisitor. And it does the right >> thing with transforms. >> >> osg::ComputeBoundsVisitor cbbv; >> node->accept(cbbv); >> osg::BoundingBox bb = cbbv.getBoundingBox(); >> osg::Vec3 size = bb._max - bb._min; >> >> // Then size contains the size in X, Y and Z. > > For purposes of analyzing models, it's often useful to have access to > this information from the command line. The osgWorks project > (osgworks.googlecode.com) contains the osgwbvv application to display > bounding volume information, either as a sphere or (using > ComputeBoundsVisitor) as a box. > > >osgwbvv cow.osg > Sphere: > Center 0.776125 -0.43866 0 > Radius 6.35558 > > >osgwbvv --box cow.osg > Box: > Center 0.776125 -0.43866 0 > Radius 6.35558 > Extents 10.4439 3.40282 6.39676 > > The bounding volume (sphere or box) is also displayed graphically as > line geometry around the model.
Hi J-S, Paul, how could I have missed this! Thank you for the tips :) _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
