Hi Sebastian, I have dig down and find the resolution of the OpenGL error, I passed an int or double instead of a float into the shader. There is something strange with how I assign the texture, I rewrote it as
[code] osg::Uniform* specEnvMap = new osg::Uniform(osg::Uniform::SAMPLER_CUBE,"SpecularEnvMap"); specEnvMap->set(tex); osg::Uniform* diffEnvMap = new osg::Uniform(osg::Uniform::SAMPLER_CUBE, "DiffuseEnvMap"); diffEnvMap->set(tex); [/code] To make sure that it is of type sampleCube. I could upload all code, since I'm trying to write a minimal program which demonstrates Image Based Lighting. It is two files, one header and one cpp, in total 170 lines. Would that be of any help? kind regards Patrik On Tue, May 13, 2014 at 11:04 AM, Sebastian Messerschmidt < [email protected]> wrote: > Hi Patrik, > > > Okay, I've digged a bit deeper into your code. Somehow your code to add > the textures seems awkward. You are assigning the cubemap to the first > texture unit and create 3 uniforms to texture unit 0. > It is hard to tell what is going wrong on your side, given that small > piece of code, but since you get an OpenGL error you should chase it down. > It might be related to binding the texture to multiple sampler objects on > the same texture unit. Try to step back and bind the cubemap to a simple > program with exactly one cubemap sampler and do some debugging with a > simple cubemapping shader. > There is a osgcubemap example which you could extend to use shaders > (beware that TexGen will not work with shaders, so you will have to write > your own in the vertex shader, which is not complicated though) > > I don't know the specific example you are referring to, so I cannot really > give your more pointers unless you prepare a small compiling example. > > Hi Sebastian, > > Yes, that works as well, the sphere is red. > > cheers > Patrik > > > On Tue, May 13, 2014 at 10:32 AM, Sebastian Messerschmidt < > [email protected]> wrote: > >> Hi Patrik, >> >> Hi Sebastian, >> >> The baseColor is applied to the sphere, so I can see my shader is in >> use. No differences when using osgShadow or not. >> >> Yes because it is the first texture unit. Fixed function pipeline and >> osgShadow will handle it. Please follwo my advice and change the output of >> the fragment shader to >> gl_FragColor = vec4(1,0,0,1) or gl_FragData[0] = vec4(1,0,0,1) >> to see if it is _really_ your shader. >> >> cheers >> Sebastian >> >> >> Cheers >> Patrik >> >> >> On Tue, May 13, 2014 at 10:03 AM, Sebastian Messerschmidt < >> [email protected]> wrote: >> >>> Hi Patrick, >>> >>> from a glimpse it seems you are setting up the shader to the geode while >>> using osgShadow, which will override your shaders. >>> I guess you need to set the shaders at the shadowTechnique. Could you >>> try it without osgShadow or simply do some shader debugging by setting the >>> gl_FragColor to some debug value to see if your shader is used at all? >>> >>> cheers >>> Sebastian >>> >>> HI, >>> >>> I'm trying to implement Image Based Lighting in a scene. but I think I >>> miss something essential. >>> I have copied the fragment shader and vertex shader from the orange >>> book, ch 12/Image Based Lighting. Created a sphere which shall be the >>> emissive surface. >>> >>> When I run I receive following warning/error msg: >>> Warning: detected OpenGL error 'invalid operation' at After >>> Renderer::compile. >>> >>> The sphere is colored by the base-color, but it is not emissive. What >>> kind of attributes do I need to set to get it work, or should I make things >>> in a different order? See code below. >>> >>> Kind regards >>> Patrik >>> >>> This is the main code: >>> [code] >>> osgShadow::ShadowedScene* scene(new osgShadow::ShadowedScene()); >>> osgShadow::ShadowMap* sm(new osgShadow::ShadowMap()); >>> sm->setTextureSize(osg::Vec2s(512,512)); >>> scene->setShadowTechnique(sm); >>> osg::Group* root = new osg::Group; >>> osg::Geode* em = new osg::Geode(); >>> em->addDrawable(new osg::ShapeDrawable(new >>> osg::Sphere(osg::Vec3(0,0,0), 10.0) ) ); >>> osg::Geode* geode = new osg::Geode(); >>> geode->addDrawable(new osg::ShapeDrawable( new >>> osg::Cylinder(osg::Vec3(0,0,-3.0),10,0.2 >>> ) )) ; >>> geode->setCullingActive(true); >>> root->addChild(em); >>> root->addChild(geode); >>> scene->addChild(root); >>> osg::TextureCubeMap* tex = readCubeMap(); >>> >>> { >>> osg::StateSet* ss = em->getOrCreateStateSet(); >>> osg::Program* program = new osg::Program; >>> program->setName( "IBL" ); >>> program->addShader( new osg::Shader( osg::Shader::VERTEX, >>> IBLVertSource ) ); >>> program->addShader( new osg::Shader( osg::Shader::FRAGMENT, >>> IBLFragSource ) ); >>> >>> ss->setAttributeAndModes( program, osg::StateAttribute::ON ); >>> osg::Uniform* baseColor = new osg::Uniform( "BaseColor", >>> osg::Vec3(0.2, 0.4, 0.6) ); >>> osg::Uniform* specular = new osg::Uniform( "SpecularPercent", 0); >>> osg::Uniform* diffuse = new osg::Uniform( "DiffusePercent", 1.0); >>> osg::Uniform* specEnvMap = new osg::Uniform("SpecularEnvMap", 0); >>> osg::Uniform* diffEnvMap = new osg::Uniform( "DiffuseEnvMap", 0); >>> ss->setTextureAttributeAndModes(0, tex, osg::StateAttribute::ON ); >>> ss->addUniform( baseColor ); >>> ss->addUniform( specular ); >>> ss->addUniform( diffuse ); >>> ss->addUniform( specEnvMap ); >>> ss->addUniform( diffEnvMap ); >>> } >>> >>> viewer.setSceneData(scene); >>> viewer.run(); >>> [/code] >>> >>> >>> _______________________________________________ >>> osg-users mailing >>> [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 >>> >>> >> >> >> _______________________________________________ >> osg-users mailing >> [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 >> >> > > > _______________________________________________ > osg-users mailing > [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 > >
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