Hi Mike. Maybe it is a driver bug, yes. The repro code is the example code of the osgPPU (projects.tevs.eu/osgppu) library.
However I have to check if the error doesn't appear on my machine at home, because there I have updated the drivers already (oh, this GPU-fan bug makes me crazy ;-) ). Cheers, Art > Hi Art, > > Per the spec > http://www.opengl.org/registry/specs/EXT/geometry_shader4.txt > > > - the default value of GEOMETRY_VERTICES_OUT_EXT is > 0. > > - error INVALID_VALUE is generated by > ProgramParameteriEXT if > GEOMETRY_VERTICES_OUT_EXT is negative or exceeds > MAX_GEOMETRY_OUTPUT_VERTICES_EXT. > > If the error happening due to ProgramParameteriEXT > then I'd say it's a > driver bug. > > Such an error is defined during link: > <quote> > Linking will also > fail if the program object contains objects to > form a geometry > shader (see > section 2.16), but no objects to form a vertex > shader or if the > program > object contains objects to form a geometry > shader, and the value of > GEOMETRY_VERTICES_OUT_EXT is zero. > </quote> > But that appears not to be your situation. > > I've not experienced this error myself on Quadro FX > 360M w/ ForceWare > 101.19. I'll be glad to run repro code if you can > send. > > But my guess is a driver update is in order. > > Cheers > -- mew > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > [mailto:osg-users- > > [EMAIL PROTECTED] On Behalf Of Art > Tevs > > Sent: Friday, January 11, 2008 9:33 AM > > To: OpenSceneGraph Users > > Subject: [osg-users] Bug in GeometryShaders > causing OpenGL Error > > > > Hi! > > > > After updating the osg version from the svn which > do > > include the geometry shader implementation I got > > always an OpenGL invalid value error. (nVidia > driver > > 100.14.1) > > > > The error is located in the Program.cpp in the > line > > 2667: > > > > _extensions->glProgramParameteri( > _glProgramHandle, > > GL_GEOMETRY_VERTICES_OUT_EXT, > > _program->_geometryVerticesOut ); > > > > Here the default value of _geometryVerticesOut is > set > > to 0, which do cause problems on my system. > Changing > > the default value to 1 in the constructor line > 2319: > > > > Program::Program() : > > _geometryVerticesOut(1), > > _geometryInputType(GL_TRIANGLES), > > _geometryOutputType(GL_TRIANGLE_STRIP) > > { > > } > > > > > > doesn't break any rendering (I do not use geometry > > shaders at now) and removes the invalid value > error. > > > > Could somebody please chek this. > > > > Best regards, > > Art > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > __________________________________ Ihr erstes Fernweh? Wo gibt es den schönsten Strand? www.yahoo.de/clever _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
