Hi Paul,
(just keeping the results here so it's easy to see what we're talking
about, sorry for the 5 levels of quoting :-) )
_min = ( -1.4047172 , -0.94869113 , -1.9402435 )
_max = ( 2.7989883 , 0.95002991 , 0.33612174 )
...
_min = ( -1.4047172 , -0.94869113 , -11.940244 )
_max = ( 2.7989883 , 0.95002991 , -5.3083067 )
Are you sure that the compute bounds visitor doesn't already compute a
world space bound? You are applying the local to world transform again
to that bbox, which might explain the double Z -5 transform
Reasonably sure, yes. And as you can see the transformed _max.z() is
(approximately) correct (i.e. ~ untransformedBB._max.z() + -5).
I'll continue looking into this soon, but it's relatively low priority
right now.
Actually, I had another question: how would one transform a bounding
sphere? The center is easy: transform the Vec3 the same way as any
other. For the radius (if the transforms above contain scales), I'd
think something like this would be OK:
osg::Vec3 radiusVec(bs._radius, 0, 0);
radiusVec = osg:Matrixd::transform3x3(radiusVec, localToWorld);
bs._radius = radiusVec.length();
(if there are only rotations, the length will stay the same as before,
but if there are scales, it will change)
Does that sound right?
J-S
--
______________________________________________________
Jean-Sebastien Guay [EMAIL PROTECTED]
http://www.cm-labs.com/
http://whitestar02.webhop.org/
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