[osg-users] osgUtil::Optimizer crash

[S.I.M. van Keulen]

Hello All,

I encountered a problem with osgUtil::Optimizer.
The merge of two Vec3 vertex arrays fails in:
optimizer.cpp: MergeArrayVisitor::_merge
The problem started when I changed the construction of a Geode from
having one Geometry to having several.
When I do not optimize there is no problem. Rendering is just fine. Also
no problems at shut-down and no memory leaks.
At first I suspected a memory management bug in my code, but I just
can't see it.

*This is roughly what I did before the problem:

*osg::Geode*
Construct(void)
{
osg::Geode* l_Geode = new osg::Geode;
osg::Geometry* l_Geometry = new osg::Geometry;
osg::Vec3Array* l_Vertices = new osg::Vec3Array;
l_Geometry->setVertexArray(l_Vertices);

for (..)
{
for (..)
{
l_Vertices->push_back(..);
l_Vertices->push_back(..);
l_Vertices->push_back(..);
l_Vertices->push_back(..);

l_Geometry->addPrimitiveSet(new
osg::DrawArrays(osg::PrimitiveSet::QUADS, l_Vertices.size()-4, 4));
}
}
l_Geode->addDrawable(l_Geometry);
return l_Geode;
}

*This is roughly what I do now, causing the problem:

*osg::Geode*
Construct(void)
{
osg::Geode* l_Geode = new osg::Geode;
osg::Geometry* l_Geometry = NULL;
osg::Vec3Array* l_Vertices = NULL;

for (..)
{
l_Geometry = new osg::Geometry;
l_Vertices = new osg::Vec3Array;
l_Geometry->setVertexArray(l_Vertices);

for (..)
{
l_Vertices->push_back(..);
l_Vertices->push_back(..);
l_Vertices->push_back(..);
l_Vertices->push_back(..);

l_Geometry->addPrimitiveSet(new
osg::DrawArrays(osg::PrimitiveSet::QUADS, l_Vertices.size()-4, 4));
}

l_Geode->addDrawable(l_Geometry);
}

return l_Geode;
}

I'm fairly new to OSG, so if someone could give me a pointer. That would
be much appreciated.

Serge

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[Robert Osfield]

Hi Serge,

Which version of the OSG are you using? Which OS? In 2.3.x/2.4
there was a bug fix to Optimizer that might fix the problem you are
seeing.

Also any chance of you providing an example dataset?
Robert.