Robert, Great news! I look forward to using this in the near future either through OSG directly or osgEarth.
Was a bit amused by your comment about the accuracy on "finding your house". I think it's a great feature, especially considering how that data can be used by autonomous vehicles eventually. -Nathan On Wed, Mar 17, 2021 at 12:36 PM Robert Osfield <[email protected]> wrote: > Hi All, > > Over the past 2 1/2 years I've been mainly focused on VulkanSceneGraph > project, this isn't yet at 1.0 but it's come along nicely. This week I > wrote an example that illustrates how to use vsg::PagedLOD and > vsg::ReaderWriter to implement paged database that streams data from online > tile serves such a OpenStreetMap and ReadyMap. It's like a very simple and > crude demo of osgEarth style paging. > > To look at the visual differences and performance differences I've > recorded a camera animation path in osgviewer then run this same path with > the same OpenStreetMap databasee in osgviewer using osgEarth, and then with > the same path but using the new vsgpagedlod example. > > > https://github.com/vsg-dev/vsgExamples/tree/PagedLOD/examples/nodes/vsgpagedlod > > I've upload the a video of running the two applications, first the OSG > then VSG, to youtube: > > https://www.youtube.com/watch?v=nOQxr09ald4 > > The average fps for the 2 minutes camera animation path was 878fps for the > OSG/osgEarth combo and 2698fps for VSG/vsgpagedlod, which is just under 3 > times faster for the Vulkan/VulkanSceneGraph. > > As I explain in the video it's not an exact like for like comparison as > osgEarth is doing blending between LODs, while the VSG/vsgpagedlod is > selecting a higher level of detail for a given view. > > The osgviewer was run with default DrawThreadPerContext threading, while > vsgpagedlod viewer was running single threaded. In both cases the > osgDB::DatabasePager and equivalent vsg::DatabasePager are doing all the > loading in a set of background threads. > > The VSG supports running viewer multi-threaded but is unnecessary in this > instance as the cull/draw traversal/dispatch are all happening less than > half a millisecond :-) > > -- > You received this message because you are subscribed to the Google Groups > "OpenSceneGraph Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/osg-users/b1adc63f-28b5-49b9-b200-1fcd5624b400n%40googlegroups.com > <https://groups.google.com/d/msgid/osg-users/b1adc63f-28b5-49b9-b200-1fcd5624b400n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "OpenSceneGraph Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/osg-users/CAAQ9MSNEoogWPD70%2BT%2BGZuryd1cX8SqRsd-96RB7N%3DJdKaK8AA%40mail.gmail.com.
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