I also struggled with this issue once and I believe osgspotlight suffers from exactly the same "quadrant defect" if you look closely. Would be really nice if somebody submitted a fix.
/Per On 29 September 2011 01:59, Brad Colbert <bcolb...@rscusa.com> wrote: > Glenn,**** > > ** ** > > Bingo! That was it. I wasn’t quite sure that would work with TexGen but > there you go!**** > > ** ** > > Thanks!**** > > ** ** > > **** > > ** ** > > -B**** > > ** ** > > *From:* osg-users-boun...@lists.openscenegraph.org [mailto: > osg-users-boun...@lists.openscenegraph.org] *On Behalf Of *Glenn Waldron > *Sent:* Wednesday, September 28, 2011 4:40 PM > > *To:* OpenSceneGraph Users > *Subject:* Re: [osg-users] GLSL shaders and projective texturing**** > > ** ** > > Brad,**** > > I once had the same issue; calcuating my texgen matrix like this worked:** > ** > > ** ** > > texGenMat =**** > > modelViewMat ***** > > projectionMat ***** > > osg::Matrix::translate(1, 1, 1) ***** > > osg::Matrix::scale(0.5, 0.5, 0.5);**** > > ** ** > > > Glenn Waldron / Pelican Mapping / @glennwaldron > > **** > > On Wed, Sep 28, 2011 at 7:34 PM, Brad Colbert <bcolb...@rscusa.com> wrote: > **** > > Hi Chris, > > Thanks! I found that one too but it still doesn't help me figure out how > to fix the coordinates so that my projected texture renders in the center of > the projection frustum instead of the upper right quadrant. It's strange > and I can't figure it out. > > -B**** > > > > -----Original Message----- > From: osg-users-boun...@lists.openscenegraph.org [mailto: > osg-users-boun...@lists.openscenegraph.org] On Behalf Of Chris 'Xenon' > Hanson > Sent: Wednesday, September 28, 2011 3:31 PM > To: OpenSceneGraph Users > Subject: Re: [osg-users] GLSL shaders and projective texturing**** > > On 9/27/2011 7:21 PM, Brad Colbert wrote: > > I am closer! > > Looks like the other example I have is FFP not GLSL. Here's a working GLSL > implementation (not OSG) that should be relatively easy to feed with OSG > uniforms and such: > > http://www.ozone3d.net/tutorials/glsl_texturing_p08.php#part_8 > > -- > Chris 'Xenon' Hanson, omo sanza lettere. xe...@alphapixel.com > http://www.alphapixel.com/ > Digital Imaging. OpenGL. Scene Graphs. GIS. GPS. Training. Consulting. > Contracting. > "There is no Truth. There is only Perception. To Perceive is to Exist." > - Xen > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org* > *** > > ** ** > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >
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