Hi,
computation of bb (without tranform cache) doesnt count with text
alignment(variable _offset).
Code:
/*virtual*/ osg::BoundingBox BentleyText::computeBound() const
{
osg::BoundingBox bbox;
if (_textBB.valid())
{
for(unsigned int i=0;i<_autoTransformCache.size();++i)
{
if (_autoTransformCache[i]._traversalNumber>=0)
{
osg::Matrix& matrix = _autoTransformCache[i]._matrix;
bbox.expandBy(osg::Vec3(_textBB.xMin(),_textBB.yMin(),_textBB.zMin())*matrix);
bbox.expandBy(osg::Vec3(_textBB.xMax(),_textBB.yMax(),_textBB.zMax())*matrix);
}
}
if (!bbox.valid())
{
// Provide a fallback in cases where no bounding box has been been
setup so far.
// Note, assume a scaling of 1.0 for
_characterSizeMode!=OBJECT_COORDS as the
// for screen space coordinates size modes we don't know what scale
will be used until
// the text is actually rendered, but we haven't to assume
something otherwise the
// text label will be culled by view or small feature culling on
first frame.
if (_autoRotateToScreen)
{
// use bounding sphere encompassing the maximum size of the
text centered on the _position
double radius = _textBB.radius();
osg::Vec3 diagonal(radius, radius, radius);
bbox.set(_position-diagonal, _position+diagonal);
}
else
{
osg::Matrix matrix;
matrix.makeTranslate(_position);
matrix.preMultRotate(_rotation);
//matrix.preMultTranslate(-_offset); --- this
line shoudl be added !!!!!
bbox.expandBy(osg::Vec3(_textBB.xMin(),_textBB.yMin(),_textBB.zMin())*matrix);
bbox.expandBy(osg::Vec3(_textBB.xMax(),_textBB.yMax(),_textBB.zMax())*matrix);
}
}
}
return bbox;
}
...
Thank you!
Cheers,
Filip
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=45355#45355
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