Smooth, I would say distortions occur in certain angle ranges. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of J.P. Delport Sent: Thursday, November 19, 2009 8:43 PM To: OpenSceneGraph Users Subject: Re: [osg-users] Using OsgSim Overlay
Hi, Vaibhav Bansal wrote: > Yes, this is what the overlay node does for me. > But I am unable to understand, why the stretching occurs only 'at' some > specific angles. Are the transitions smooth or are you seeing jumps? jp > > Regards > Vaibhav Bansal > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of J.P. > Delport > Sent: Thursday, November 19, 2009 3:47 PM > To: OpenSceneGraph Users > Subject: Re: [osg-users] Using OsgSim Overlay > > Hi, > > Vaibhav Bansal wrote: >> Hello jp, >> >> Thanks for the quick reply. >> How do I check if the 'resolution' of ovelay geometry is changing. > > imagine the following: > You want to overlay a 1024x1024 checkerboard onto the earth and you have > a 512x512 overlay texture. If you view the whole earth it obviously > would not look good - too much detail to fit into the texture. What the > view dependent modes try to do is this: When you zoom in, you only see a > piece of the checkerboard, so now the 512x512 texture can contain only a > piece of the checkerboard and so you see "more detail" of the overlayed > geometry. > > I think this is the effect you are seeing when you are moving the view > around. > > jp > >> Regards >> Vaibhav Bansal >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of J.P. >> Delport >> Sent: Thursday, November 19, 2009 2:41 PM >> To: OpenSceneGraph Users >> Subject: Re: [osg-users] Using OsgSim Overlay >> >> Hi Vaibhav, >> >> Vaibhav Bansal wrote: >>> Hello, >>> >>> I have added a geometry as an overlay over another geometry. >>> The overlay texture seems to distort(stretch) under certain viewing >> angles. >>> It seems the projected texture is generating incorrect texture >> coordinates. >> >> The texture coordinates might be OK, but the resolution of your >> overlayed geometry might change in the generated overlayed texture. What >> happens in OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY? Does the >> resolution/stretch stay the same? >> >> jp >> >>> The white area is the overlaySubgraph geometry, and the colored area is >> the >>> Overlay Node (base) geometry. >>> The overlay mode is VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_PROJECTION. >>> >>> Can anyone suggest where should I start troubleshooting. >>> >>> Thanks >>> Vaibhav Bansal >>> >>> >>> ------------------------------------------------------------------------ >>> >>> >>> ------------------------------------------------------------------------ >>> >>> >>> ------------------------------------------------------------------------ >>> >>> _______________________________________________ >>> osg-users mailing list >>> [email protected] >>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. _______________________________________________ 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
