Hi Sukender, That depends, really. If you just want to flatten terrain around building footprints and these buildings are located not too close to each other, you can flatten the heightmap within the footprint to, for instance, the average elevation (or perhaps the elevation value is given for that building, by some measurement or property). To avoid sharp changes in elevation you can blend in a transition area around the building footprint, interpolating between the original heightmap value and the building footprint value. It can become tricky and problematic when you have lots of different types of features (buildings, roads, rivers), located close to each other, as the height modifications may start to interfere with each other. This paper might be interesting for you (more focused on road blending though): http://www-evasion.imag.fr/Publications/2008/BN08/
Kind regards, Ruben -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: donderdag 30 juli 2009 14:23 To: OpenSceneGraph Users Subject: Re: [osg-users] [OT] Looking for a lib that adapts terrain to 3D object Ok. So adapting a triangulated regular terrain should be quite easy, I guess? Sukender PVLE - Lightweight cross-platform game engine - http://pvle.sourceforge.net/ ----- Mail d'origine ----- De: Chris 'Xenon' Hanson <[email protected]> À: OpenSceneGraph Users <[email protected]> Envoyé: Tue, 28 Jul 2009 19:42:32 +0200 (CEST) Objet: Re: [osg-users] [OT] Looking for a lib that adapts terrain to 3D object [email protected] wrote: > Ah yes? What do you mean exactly by "modern heightfields" and > "best-practice"? What if I operate outside VPB? > Thanks It doesn't work on the Heightfield objects VPB now recommends you use. I believe it wants th eold-style TIN terrain. I don't know if you can still make non-heightfield TIN terrain in VPB or not. -- 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 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org This e-mail and its contents are subject to the DISCLAIMER at http://www.tno.nl/disclaimer/email.html _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
