Have you tried "normalizing" your normals after scaling? On 7/3/08 1:36 PM, "Galen Faidley" <[EMAIL PROTECTED]> wrote:
> Doug, > > Thanks for getting back to Abhishek on this. I have been working with > him on the issue as well. > > We had already tried alternate default lights and the custom lighting > but nothing seemed to help (we also tried them again after your post > as a sanity check). However, seeing the working lights in your screen > shot made us do some more experimentation. It turns out we were not > quite using the default osgNav. We had scaled the model by a factor > 0.001. When we removed the scale the lighting behaved as expected. > We also added the scale to the osg file and the lighting in osgviewer > looked exactly like what we originally saw in juggler (the files are > both attached). > > So I guess the question is how do we scale a light or at least get > equivalently lighting with the scaled model? I tried a number of > things: attaching the light below the scale transform, scaling the > light position, and scaling all the light parameters > (constant_attenuation, linear_attenuation, etc). So far none of these > seem to make a difference. > > We'd appreciate any insight. > > Regards > Galen > > > > On Thu, Jul 3, 2008 at 11:26 AM, Doug McCorkle <[EMAIL PROTECTED]> wrote: >> >> On Jul 3, 2008, at 11:06 AM, Abhishek Seth wrote: >> >>> Hi ! >>> >>> I am having problems with how models look when loaded in my Application. I >>> am using OSGNav Sample program from VR Juggler 2.2.1 with OSG 2.4. Juggler >>> uses osgUtil::SceneView but does not use osgViewer::. >>> >>> When I load the file in OsgViewer it looks great; however in Juggler's >>> OSGNav it looks awful (the colors get washed out). I suspect this is related >>> to how Juggler is handling the Materials and Lighting while rendering the >>> model. I have spent a fair amount of time working through osgviewer.exe in >>> the debuger to try to determine the what it is doing with lighting. It >>> seems to set up multiple lights and calls into the light::apply each frame. >>> Juggler sets up a sigle light and never calls into the light::apply after >>> the initial set up. Before I investigate this further I thought I'd asked >>> the list since I have the suspicion that is this something simple and >>> someone might recognive the issue my just looking at a few screen shots. I >>> have attached screenshots for both Juggler's OSGNav & OSGViewer and also the >>> osg file them self. Furthermore, I have also included a simple model of a >>> cube that demonstrates the same effect. >> >> I imagine this has something to do with how the light is being setup. I >> would try using different settings in the: >> >> http://developer.vrjuggler.org/docs/vrjuggler/2.2/programmer.reference/classv >> rj_1_1OsgApp.html#1b1994aa3043cd522e749853595d4796 >> >> or setup your own light: >> >> http://developer.vrjuggler.org/docs/vrjuggler/2.2/programmer.reference/classv >> rj_1_1OsgApp.html#e0a9dc2d8da29770af997f811df10144 >> >> Here is what your data looks like in my VR Juggler / OSG app. >> >> Doug >> >> >> >> >> _______________________________________________ >> 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 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
