Re: [osg-users] DatabasePager setTargetMaximumNumberOfPageLOD behavior
HI Farshid,
The TargetMaximumNumberOfPageLOD is a hint to the pager to try and
expire inactive PageLOD so that the total number stays at or below the
specified number. It only expires inactive PagedLOD though, so it's a
target not a hard fast measure, if the current view requires more than
the target then PagedLOD are active and can't be discarded.
If you've found an error in the maths or a better scheme for working
out which to expire then send it along to osg-submissions. The scheme
has to be efficient as not to bog down the pager or update threads.
Robert.
On 21 May 2013 04:41, Farshid Lashkari fla...@gmail.com wrote:
Hi,
I'm hoping to get some clarification on how the
DatabasePager::setTargetMaximumNumberOfPageLOD is supposed to work. I am
setting this value to 3 in my application. I then use the following function
to create and add PagedLODs the the scene:
void AddPagedLOD()
{
osg::ref_ptrosg::PagedLOD lod = new osg::PagedLOD;
lod-addChild( new osg::Group, 10.0f, FLT_MAX );
lod-setFileName(1,large.osgb);
lod-setRange(1,0.0f,10.0f);
root-addChild(lod);
}
When I add 3 PagedLODs to my scene and have them load the file, they are
never released from memory once I leave the active range. This makes sense
since the number PagedLODs is not above the target.
However, when I add 4 PagedLODs then leave the active range, all 4 files are
released from memory. I was expecting only 1 of the files to be released.
Am I misunderstanding the behavior of this setting or should only 1 file be
released in this case?
I had a quick glance at the DatabasePager source and was able to make two
small changes to get the behavior I was expecting. However, I don't have
much experience dealing with PagedLODs and wanted to verify that this should
be the correct behavior before submitting a patch.
Cheers,
Farshid
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Re: [osg-users] DatabasePager setTargetMaximumNumberOfPageLOD behavior
Thanks Robert. I'll just submit my patch and get feedback from there.
Cheers,
Farshid
On Mon, May 20, 2013 at 11:59 PM, Robert Osfield
robert.osfi...@gmail.comwrote:
HI Farshid,
The TargetMaximumNumberOfPageLOD is a hint to the pager to try and
expire inactive PageLOD so that the total number stays at or below the
specified number. It only expires inactive PagedLOD though, so it's a
target not a hard fast measure, if the current view requires more than
the target then PagedLOD are active and can't be discarded.
If you've found an error in the maths or a better scheme for working
out which to expire then send it along to osg-submissions. The scheme
has to be efficient as not to bog down the pager or update threads.
Robert.
On 21 May 2013 04:41, Farshid Lashkari fla...@gmail.com wrote:
Hi,
I'm hoping to get some clarification on how the
DatabasePager::setTargetMaximumNumberOfPageLOD is supposed to work. I am
setting this value to 3 in my application. I then use the following
function
to create and add PagedLODs the the scene:
void AddPagedLOD()
{
osg::ref_ptrosg::PagedLOD lod = new osg::PagedLOD;
lod-addChild( new osg::Group, 10.0f, FLT_MAX );
lod-setFileName(1,large.osgb);
lod-setRange(1,0.0f,10.0f);
root-addChild(lod);
}
When I add 3 PagedLODs to my scene and have them load the file, they are
never released from memory once I leave the active range. This makes
sense
since the number PagedLODs is not above the target.
However, when I add 4 PagedLODs then leave the active range, all 4 files
are
released from memory. I was expecting only 1 of the files to be released.
Am I misunderstanding the behavior of this setting or should only 1 file
be
released in this case?
I had a quick glance at the DatabasePager source and was able to make two
small changes to get the behavior I was expecting. However, I don't have
much experience dealing with PagedLODs and wanted to verify that this
should
be the correct behavior before submitting a patch.
Cheers,
Farshid
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http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
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Re: [osg-users] [Viewer] Detecting mouse move
Asher, The GUIEventAdapter::DRAG event is not what you are looking for? Regards, Judson On 5/20/2013 5:00 PM, Asher Kamiraze wrote: Hi all, In some of my application, I would like to detect when a clic + mouse move event happen. My goal is to display on screen during the clic + mouse move only objects bounding boxes. Do you have any hint on how to do this? Maybe some tips starting from osgviewer could help! Best regards, Asher ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
