Hi Gordon, We have many different point-cloud datasets from both terrestial and aerial LiDAR scans, most of them in the range of ~20M points (some with intensity values and/or with rgb values), but some sets total over 2B points divided in tiles. I now build either a quad- or oct tree datastructure with LODs that take a subset from each tile. The results are promising and really have a different feel than 2.5D terrains. I was surprised even a lot of people in the remote-sensing field have never explored full 3D point clouds interactively (thanks OSG!).
We're still in a prototyping stage though (python and osgswig help :-), and I am now experimenting with balancing point rendering size, LOD levels and subsampling from pointsets in order to get "just enough" points on-screen for a solid visual impression with a high frame rate. Real framerates are difficult to give at this point, as they are now really card and view dependent. Currently, a scan of the whole of the Netherlands is in progress with a minimum sampling of 10 xyz points per square meter (a 5 year project). I am using a small subset of this now for experiments, but hope to be able to provide smooth interactive exploration for the whole of this scan. If you like we can discuss more detailed aspects off the list. What is your application / data for? Gerwin On Sat, Jan 17, 2009 at 4:33 PM, Tomlinson, Gordon <gtomlin...@overwatch.textron.com> wrote: > HI Gerwin > > Interesting screen shot > > Being noisy now ;-) what sort of numbers in points are you using/getting > with you point clouds > > We are doing similar work it seems > > > Gordon _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
