Re: [osg-users] PagedLOD usage??
I see, so the DatabasePager works even if I don't subclass osgViewer, I was getting worried there. Well seems like my bounding volumes are misplaced and that's why I'm not getting anything on the screen... -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=24237#24237 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PagedLOD usage??
Hi, "Adrian Lindberg" writes: > I can't seem to get a hang of this. Still new to OSG. > > So what I gather I shouldn't use addChild but simply setup setFileName() and > setRange()? Then the PagedLOD will take care of the rest? > > Also, what do I need to setup for the DatabasePager that isn't supplied by > osgViewer? If I sub-class which parts do I want to replace? > > Is there any tutorial for this? The PagedLOD example doesn't do any of it > with a viewer but simply preps the data. > > Slightly confused... I recall some good post about converting a LOD database to a PagedLOD one. Maybe it is useful to you: http://www.mail-archive.com/osg-us...@openscenegraph.net/msg06723.html Regards, Alberto ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PagedLOD usage??
On Tue, Feb 16, 2010 at 3:54 PM, Chris 'Xenon' Hanson wrote: >> Is there any tutorial for this? The PagedLOD example doesn't do any of it >> with a viewer but simply preps the data. > > The PagedLOD example is not a great learning tool, it is for converting an > LOD-based > database to PagedLOD. Which, now that I think of it, might be useful for you. The osgphotoalbum does a bit creative use of PageLOD and a psuedo plugin to provide a dynamic geometry creation and image loading system. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PagedLOD usage??
On 2/16/2010 8:35 AM, Adrian Lindberg wrote: > I can't seem to get a hang of this. Still new to OSG. > So what I gather I shouldn't use addChild but simply setup setFileName() and > setRange()? Then the PagedLOD will take care of the rest? Yes. Make sure the file for the child exists on disk, then fill the names and ranges. > Also, what do I need to setup for the DatabasePager that isn't supplied by > osgViewer? If I sub-class which parts do I want to replace? I think basic osgViewer has all the magic you need. But if you go rolling your own viewer, you need to make sure to replicate what it does. > Is there any tutorial for this? The PagedLOD example doesn't do any of it > with a viewer but simply preps the data. The PagedLOD example is not a great learning tool, it is for converting an LOD-based database to PagedLOD. Which, now that I think of it, might be useful for you. -- Chris 'Xenon' Hanson, omo sanza lettere Xenon AlphaPixel.com PixelSense Landsat processing now available! http://www.alphapixel.com/demos/ "There is no Truth. There is only Perception. To Perceive is to Exist." - Xen ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PagedLOD usage??
I can't seem to get a hang of this. Still new to OSG. So what I gather I shouldn't use addChild but simply setup setFileName() and setRange()? Then the PagedLOD will take care of the rest? Also, what do I need to setup for the DatabasePager that isn't supplied by osgViewer? If I sub-class which parts do I want to replace? Is there any tutorial for this? The PagedLOD example doesn't do any of it with a viewer but simply preps the data. Slightly confused... -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=24231#24231 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PagedLOD usage??
Hi Chris, Thank you so much for your help. i was just thinking about writing my own pagedLOD mechanism. it works really nice now. thanks again :) On Mon, Feb 15, 2010 at 6:09 PM, Chris 'Xenon' Hanson wrote: > On 2/15/2010 6:25 AM, Ufuk wrote: > > do you think i miss something? should i use PagedLOD for my purpose or i > > should implement something different??* > > PagedLOD should do the trick for you. > > Often, you will put in the first LOD as already-leaded, and leave its > filename blank. > Then, add the higher LODs without using addChild -- you don't want to add a > Node, you just > want to fill out the filename and ranges in the PagedLOD perRangeData. The > DatabasePager > will load them for you when needed. > > If you want the first LOD loaded for you, do not create and add a blank > Node as you are > doing here. Just add a perRangeData to the PagedLOD node, and start the > main OSG program > loop running. Make sure you are using something derived from osgViewer and > that you have > all the DatabasePager bits hooked up properly or background loading won't > work. > > -- > Chris 'Xenon' Hanson, omo sanza lettere Xenon > AlphaPixel.com > PixelSense Landsat processing now available! > http://www.alphapixel.com/demos/ > "There is no Truth. There is only Perception. To Perceive is to Exist." - > Xen > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- Ufuk ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PagedLOD usage??
On 2/15/2010 6:25 AM, Ufuk wrote: > do you think i miss something? should i use PagedLOD for my purpose or i > should implement something different??* PagedLOD should do the trick for you. Often, you will put in the first LOD as already-leaded, and leave its filename blank. Then, add the higher LODs without using addChild -- you don't want to add a Node, you just want to fill out the filename and ranges in the PagedLOD perRangeData. The DatabasePager will load them for you when needed. If you want the first LOD loaded for you, do not create and add a blank Node as you are doing here. Just add a perRangeData to the PagedLOD node, and start the main OSG program loop running. Make sure you are using something derived from osgViewer and that you have all the DatabasePager bits hooked up properly or background loading won't work. -- Chris 'Xenon' Hanson, omo sanza lettere Xenon AlphaPixel.com PixelSense Landsat processing now available! http://www.alphapixel.com/demos/ "There is no Truth. There is only Perception. To Perceive is to Exist." - Xen ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] PagedLOD usage??
Hi all, sorry, this question seems very odd but i could not solved the problem. i need simple paged lod mechanism and i can see that there is a class for this purpose in osg named osg::PagedLOD i have terrain pages with different resolutions. since there are many of them, i don't want to load all of them at the beginning of the program. i want them to be loaded when the camera goes there. osg::LOD works perfect but it loads all the models at the beginning of the program. i call the functions like that: //CALL OF osg::LOD osg::Node* node = osgDB::readNodeFile(filename); lod->addChild(node, min, max); //CALL OF osg::PagedLOD osg::Node* node = new osg::Node(); pagedLOD->addChild(node, min, max, filename); when i use PagedLOD instead of LOD, i dont load the node file at the beginning. but the problem is when i use pagedLOD i cant see anything. it just works when i use LOD. do you think i miss something? should i use PagedLOD for my purpose or i should implement something different??* any idea would be great :) thanks -- Ufuk ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
