Ok. I'll put something together and submit it again. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Farshid Lashkari Sent: 19 November 2007 17:46 To: OpenSceneGraph Submissions Subject: Re: [osg-submissions] State.cpp
Hi Joseph, If this is the case then you might need to modify the initialization of the _glMaxTextureCoords variable to check if the OpenGL version is less than 2.0 and use GL_MAX_TEXTURE_UNITS if so. I can tell you that the current behavior is necessary for the latest nVidia OpenGL drivers. My card supports 16 texture units but only 8 texture coordinate units, so an error would be caused by your current fix. -Farshid On Nov 19, 2007 9:34 AM, Joseph Steel <[EMAIL PROTECTED]> wrote: > On the machine that I've been using _glMaxTextureCoords is 1 and > _glMaxTextureUnits is 4! Using _glMaxTextureCoords in the test therefore > prevents me using the other texture units. > > Ahh! On this machine calling: > glGetIntegerv(GL_MAX_TEXTURE_COORDS,&_glMaxTextureCoords); > > gives an error in initializeExtensionProcs() (GL_INVALID_ENUM = pname was > not an accepted value). As the value of _glMaxTextureCoords is initialised > to 1 then this value remains. > > The driver on this machine supports OpenGL v1.5 100% but not 2.0. Would I be > right in thinking that GL_MAX_TEXTURE_COORDS is in OpenGL2.0 and not > necessarily in earlier versions? > > If this is the case, as it seems, what's the solution? The answer isn't > update the drivers on my machine! > > Joseph > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of > Farshid Lashkari > Sent: 19 November 2007 17:07 > To: OpenSceneGraph Submissions > Subject: Re: [osg-submissions] State.cpp > > > Hi Joseph, > > The documentation for glClientActiveTexture says the index can range > from 0 to GL_MAX_TEXTURE_COORDS - 1, so I believe the current behavior > is correct. Here is the link to the documentation for this command on > the OpenGL site: > > http://www.opengl.org/sdk/docs/man/xhtml/glClientActiveTexture.xml > > -Farshid > > On Nov 19, 2007 3:20 AM, Joseph Steel <[EMAIL PROTECTED]> > wrote: > > > > > > > > > > In osg Ver2.2 public release osg::State::setClientActiveTextureUnit > > (State.cpp, line759) the test (I think) should be: > > > > if (_glClientActiveTexture && unit < (unsigned int)_glMaxTextureUnits) > > > > and not _glMaxTextureCoords. > > > > I've attached a modified version of the file (osg\State.cpp) > > > > Joseph Steel > > _______________________________________________ > > osg-submissions mailing list > > [email protected] > > > http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph. > org > > > > > _______________________________________________ > osg-submissions mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph. > org > > _______________________________________________ > osg-submissions mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph. org > _______________________________________________ osg-submissions mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph. org _______________________________________________ osg-submissions mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph.org
