On 12/11/2009 7:54 AM, Sukender wrote: > Hi all, > > I've got model tiles (urban zone, files such as .osg/ive, .3ds ...) which > need to be visualized using pagedLODs. > Can VPB do with models what it does with terrain? That is to say, can VPB > help me in a way or another to: > - Create less detailed version of the tiles? (Am I a bit optimistic?) > - Arrange tiles under LODs/pagedLODs into a master file? > - Deform tiles according to coordinates system? (I guess so, using OGR?) > If answers are "no", do you have an idea on how to acheive this goal?
The answers, in my experience are no, no and no. ;) Can you clarify what your tiles are exactly? Are they a ground surface and building on top of them? If so, I don't expect VPB would ever be able to do #1 for you. Creating lower LODs of arbitrary geometry is sort of beyond its scope. #2 would be nice, but isn't done at this time. My experience is that the usual work-around is to install callbacks on the PagedLOD load so that when a new VPB-created terrain tile is loaded, your callback is invoked and can locate, load and attach any cultural decorations like buildings and such. #3: OGR is probably way too slow to do this. There might be a way to translate your model in advance into the same coordinate system VPB builds your data into (often geographic lat/lon) and then employ a technique similar to osgTerrain::Locator to then transform those coordinates into 3D space so that they come deformed the same way the terrain tiles do. I believe it's the Locator that performs the Earth-curvature process. > Thank you. > Sukender > PVLE - Lightweight cross-platform game engine - http://pvle.sourceforge.net/ -- 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 [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
