Hi Carsten, Hi Dirk, I was far away from thinking about GL_NORMALIZE issues. I just found the problem. As I create a new GL context whenever I change the pixel format of our main window, I need to re-set that kind of information, too. So calling reinitializeAllGLObjects() was not the whole story ;-)
If you may fix the coloring issue, I would be more than happy and my problems with this should be done... Thanks, Michael -------- Original-Nachricht -------- > Datum: Tue, 31 Jan 2012 10:08:32 -0600 > Von: Dirk Reiners <dirk.rein...@gmail.com> > An: Carsten Neumann <carsten_neum...@gmx.net> > CC: opensg-users@lists.sourceforge.net > Betreff: Re: [Opensg-users] OpenSG1.8 - Material Error > > Hi Carsten, > > On 01/30/2012 06:52 PM, Carsten Neumann wrote: > > > > thanks for the analysis. There is definitely something wrong with these > lines > > (at the very least activate() and changeFrom() should behave the same > way ;) ). > > I'd say if ColorMaterial != GL_NONE the expectation is that the geometry > has > > vertex colors to be used in lighting calculations (the whole point of > > glColorMaterial()), so the tests actually look backwards to me. > > > > Dirk: do you remember what the desired behavior here should be? To me it > seems > > sensible to use the diffuse color as current color (on geometry with > vertex > > colors those take precedence anyway) if ColorMaterial is GL_NONE. > > I would agree. But I do remember going back and forth on this part, and > there > some situations that were problematic, I just don't remember exactly what > they were. > > For now I would do your change. > > > Hmm, the only transforms that cause funny effects i can think of are > ones that > > contain negative scale (possibly only on one axis, to go from left to > > right-handed coordinate systems). Is that (or something equally > "unusual") the > > case here? > > The OpenGL traces you sent are very similar, the only difference is that > in the > > broken case three display lists (ids 3,4,44) are called while in the > working > > case just one (id 45). > > On 01/31/2012 05:06 AM, Michael Raab wrote: > > > > Ok, I think I may got the reason but I do not understand it. It seems > to be > the scale factor at the transformation core above the 3 geometries. The > factor > is (0.001, 0.001, 0.001). If I multiply that factor directly onto the > vertices > the rendering becomes correctly shaded. If I simply set this factor to > (1.0, > 1.0, 1.0) the geometry is shaded correctly as well but unfortunately way > to > large.. ;-) > > I would guess that this transformation is quite usual soI do not > understand > why this may cause problems... > > I'll send you the geometry that causes that problems off the list. > > Scales are always a problem with lighting, that's what GL_NORMALIZE is > for. > Normally that is always enabled in OpenSG (inside OSG::Window::setupGL, > usually > called from xxxWindow::init). I don't know how you setup your window, > maybe you > can check the OpenGL log to make sure glEnable(GL_NORMALIZE) is called. > > Yours > > Dirk > > -- > Dirk Reiners > m...@dirkreiners.com > > "God must really love stupid people. Why else would he make so many of > them?" > Walter > Rothschild > > ------------------------------------------------------------------------------ > Keep Your Developer Skills Current with LearnDevNow! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-d2d > _______________________________________________ > Opensg-users mailing list > Opensg-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/opensg-users -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Opensg-users mailing list Opensg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opensg-users
