HI Paul, A month or so ago I did a bug fix to ShadowMap so that it properly used the light sources settings of ambient and diffuse.
Just tried out your model and get the same visual as you. Looking at the file its clear that the new code is actually working properly while the old code was buggy... look at the colour of the shadows on the old one, the back faces of the boxes are too light. The question has to be why the highlight in the center and dark corners.. my guess this the shaders lighting model being somewhat screwed when handling coarsely tessellated objects, that's just a guess though. I'd suspect this issue might have been in there in the first place but hidden by the incorrect lighting settings. Robert. On Jan 15, 2008 3:58 PM, Paul Martz <[EMAIL PROTECTED]> wrote: > Thanks, this resolved the message about glProgramParameter. Unfortunately, > that appears to be unrelated to the rendering issue. The rendered image with > 2.3.x is still incorrect compared to 2.2. > > I've attached two screenshots so you can compare. I've also attached a .osg > file to reproduce the problem. As you can see, in 2.3.x, the Cube > ShapeDrawables appear to have white at their center but black at their > corners. This phenomena only occurs when the Cube ShapeDrawables are > rendered as a subgraph of ShadowedScene with the ShadowMap technique (if you > hack the .osg file to remove the ShadowedScene, you'll see this "black at > corners" issue goes away). > > It is not a lighting artifact, as the same issue is visible regardless of > whether lighting is enabled or disabled. In the attached .osg file, > GL_LIGHTING is OFF; switch it on to see that the issue doesn't change. > > The 2.2 screen shot correctly shows the Cube ShapeDrawables as all white. > > Any idea what changed in ShadowMap post-2.2 that would cause this? Is there > any way to restore the previous behavior? > > Thanks, > > Paul Martz > Skew Matrix Software LLC > http://www.skew-matrix.com > 303 859 9466 > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf > > > Of Robert Osfield > > > > Hi Paul, > > > > Yesterday I spotted OpenGL warning being generated by the OSG > > when running shaders, and traced it back to an addition that > > Mike made for the geometry shader support. I've added an > > extra check against geometry shader support before calling > > these methods and fixed the > > OpenGL warning. My guess it'll fix the problem your seeing too with > > shadowmap. This fix is in 2.3.2 and SVN. > > > > Could you update and let me know if you still see this issue? > > > > Robert. > > > > On Jan 14, 2008 10:27 PM, Paul Martz <[EMAIL PROTECTED]> wrote: > > > > > > Hi Robert -- osgShadow::ShadowMap no longer produces > > correct results > > > for me in 2.3.x, though 2.2 still works fine. > > > > > > In 2.3.x, I now get the following displayed when I execute > > an app that > > > uses > > > ShadowMap: > > > Error: glProgramParameteri not supported by OpenGL driver > > > > > > I'm reluctant to upgrade drivers as newer NVIDIA Windows > > drivers kill > > > performance for occlusion query. Is there an environment > > variable that > > > will make ShadowMap behave like it used to in 2.2? > > > > > > Thanks. > > > > > > Paul Martz > > > Skew Matrix Software LLC > > > http://www.skew-matrix.com > > > 303 859 9466 > > _______________________________________________ > 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
