Hi Joel, I wonder if it's osg::State that has been configured to covert gl_ModelViewMatrix to osg_ModelViewMatrix in the shader, with inserting of the required declaration of the osg_ModelViewMartrix. If osg::State is inserting this declaration you can either disable the setUseModelViewAndProjectionUniforms(false), or just remove the declaration in your own shader.
Robert. On 30 March 2012 06:20, Joel Graff <[email protected]> wrote: > Hello, > > I'm re-implementing some shader code and I've run into a problem I've not had > before. That is, I'm switching on osg uniforms and vertex attributes for > shaders (testing GLSL 140), as it's laid out in the osgVertexAttributes > example, but it seems to only partly work. > > Here's the shader code: > > Vertex: > > Code: > > #version 140 > > uniform mat3 osg_NormalMatrix; > uniform mat4 osg_ModelViewProjectionMatrix; > in vec3 osg_Normal; > in vec4 osg_Vertex; > > out vec3 normal; > void main() > { > normal = normalize(osg_NormalMatrix * osg_Normal); > gl_Position = osg_ModelViewProjectionMatrix * osg_Vertex; //ftransform(); > } > > > > > Fragment: > > Code: > > #version 140 > > vec4 color1; > vec4 color2; > vec4 color3; > vec4 color4; > > in vec3 normal; > out vec4 glFragColor; > > void main() > { > color1 = vec4( 1.0, 0.5, 0.5, 1.0 ); > color2 = vec4( 0.5, 0.2, 0.2, 1.0 ); > color3 = vec4( 0.2, 0.1, 0.1, 1.0 ); > color4 = vec4( 0.1, 0.05, 0.05, 1.0 ); > vec4 light0 = vec4(0.0, 0.0, 0.0, 1.0); > float intensity = dot(vec3(light0), normal); > if (intensity > 0.95) glFragColor = color1; > else if (intensity > 0.5) glFragColor = color2; > else if (intensity > 0.25) glFragColor = color3; > else glFragColor = color4; > } > > > > > Error log: > > Code: > > glLinkProgram "" FAILED > Program "" infoLog: > Vertex info > ------------ > 0(3) : warning C7555: 'attribute' is deprecated, use 'in/out' insetead > 0(6) : error C1038: declaration of "osg_ModelViewProjectionMatrix" conflicts > with previous declaration at 0(2) > 0(8) : error C1038: declaration of osg_Vertex conflicts with previous > declaration at 0(3) > > > > > I've used GLSL 140+ successfully in the past (OSG 2.8.x / 2.9.x), though I > don't have that code any longer. The error log makes no sense, suggesting > I'm declaring osg_ModelViewProjectionMatrix and osg_Vertex twice, with > meaningless line references. Interestingly, the osg_NormalMatrix and > osg_Normal declarations generate no errors. > > Just to ensure it wasn't something I was doing, I modded osgVertexAttributes > to automatically load a model and apply the same GLSL 140 code - shader gen > was disabled. I didn't change any of the NodeVisitor code. Strangely > enough, I received a very similar error log for the vertex shader. > > The GLSL 140 code was modded from the original 120 in the beginner's guide. > Prior to enabling the osg uniforms and vertex attributes, I tested the > version 120 code and it worked just fine. > > Maybe I missed a CMake option when I built my 3.0.1 binaries? > > Thanks, > > Joel > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=46690#46690 > > > > > > _______________________________________________ > 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
