Hi folks,
should the IntersectionVisitor and LineSegmentIntersector be threadsafe?
With the multithreaded pseudocode below everything works fine with the
ScopedLock. If I disable the ScopedLock I get wrong results.
Thank you!
Cheers,
Matthias
Code:
osg::Vec3d dummy;
osg::ref_ptr<osgUtil::LineSegmentIntersector> lineSegmentIntersector = new
osgUtil::LineSegmentIntersector(dummy, dummy);
osg::ref_ptr<osgUtil::IntersectionVisitor> visitor = new
osgUtil::IntersectionVisitor(lineSegmentIntersector);
...
osg::Vec3d P1, P2;
lineSegmentIntersector->setStart(P1);
lineSegmentIntersector->setEnd(P2);
...
osg::Node* searchroot;
OpenThreads::Mutex mutex;
...
{
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mutex); // Works when enabled.
Doesn't work when disabled!
lineSegmentIntersector->reset();
searchroot->accept(*visitor);
}
if (lineSegmentIntersector->containsIntersections())
{
...
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=64590#64590
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