Hi Gordon,
Unfortunately, OSG does not directly support what you want as osg'S
bounding box, is as you have seen is a axially aligned min/max LL/UR
That is not true. OSG's bounding box supports separate xmin/xmax,
ymin/ymax, zmin/zmax values, so it can represent boxes that have
different sizes on all axes.
However, as Robert explained, OSG uses BoundingBox on Drawables, but
BoundingSpheres on nodes. So if you just take the root node's bounding
sphere and put that into a bounding box, of course you will get a
bounding *cube*.
ComputeBoundsVisitor is what you need. It will compute a minimal
axis-aligned bounding box for all *drawables*, not using the bounding
spheres.
#include <osg/ComputeBoundsVisitor>
osg::ComputeBoundsVisitor cbbv;
node->accept(cbbv);
osg::BoundingBox bb = cbbv->getBoundingBox();
It doesn't get much simpler than that.
J-S
--
______________________________________________________
Jean-Sebastien Guay [EMAIL PROTECTED]
http://www.cm-labs.com/
http://whitestar02.webhop.org/
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