I've had this problem before with models that are unit-less. I just manually scaled the models (as Paul suggests) until they looked "right" based on landmarks in the database where the sizes were known. It's an empirical approach but it's the best you can really do if you don't know the units of the model.
-Shayne -----Original Message----- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Paul Martz Sent: Friday, August 12, 2011 1:50 PM To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] dimension oh a model On 8/12/2011 11:11 AM, Sanat Talmaki wrote: > Hi Paul, > > Sorry for my late reply to your post. That is a very good point you bring up about the units of different objects in a scene. When one uses data from USGS in VPB to create a terrain, the rest of the objects have to be scaled up or down to represent their real world size prior to be being used in the scene....... > > But the confusion for me arises when say I load a truck in osg and its dimensions are (12, 6, 8) = (L,W,H). (don't know what units these are in) > Without knowing the units of the model (whether 12 feet/meters), how does one apply a scaling factor? As I said in my previous post, if you don't have access to any metadata that tells you what the units are, there's no way for your software to handle this in an automated way. You must either manually scale the model to fit your application coordinate system, or you must manually create some metadata. In the case you cite, both options would be based entirely on guesswork. -Paul _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
