Hi, I am currently working on my bachelor thesis which involves the OpenSceneGraph. One task is to apply a distortion shader to a rendered texture.
Unfortunately I am failing in getting any shader to work at all. After spending the last couple of days researching and reading books, I managed to get several shaders running in other libraries, be it online using WebGL or directly using OpenGL. I simply can't get it running using OSG. The code initializing the program is this. Code: // A simple 4 vertex rectangular geometry drawable. Plane* plane = new Plane(40); this->addDrawable(plane); osg::Program* program = new osg::Program(); program->setName("Debug Shader"); // This refers to a Geode. osg::StateSet& state = *this->getOrCreateStateSet(); state.setAttributeAndModes(program, osg::StateAttribute::ON); boost::filesystem::path currentPath(boost::filesystem::current_path()); // Init vertex shader. RTT::log(RTT::Debug) << "Loading vertex shader."<< RTT::endlog(); osg::Shader* vertexShader = new osg::Shader(osg::Shader::VERTEX); vertexShader->loadShaderSourceFromFile(currentPath.string() + "/../resources/shaders/debug.vert"); program->addShader(vertexShader); // Init fragment shader. RTT::log(RTT::Debug) << "Loading fragment shader."<< RTT::endlog(); osg::Shader* fragmentShader = new osg::Shader(osg::Shader::FRAGMENT); fragmentShader->loadShaderSourceFromFile(currentPath.string() + "/../resources/shaders/debug.frag"); program->addShader(fragmentShader); Vertex Shader Code: #version 430 uniform mat4 osg_ModelViewProjectionMatrix; in vec4 osg_Vertex; void main() { gl_Position = osg_ModelViewProjectionMatrix * osg_Vertex; } Fragment Shader Code: #version 430 layout(location = 0) out vec4 FragColor; void main() { FragColor = vec4(1.0, 0.0, 0.0, 1.0); } As you can see, the program is not that complicated and does compile fine. Unfortunately I don't see anything on the screen. There is no model. If I remove the program and simply use the built in lighting, coloring and texturing support it renders fine. Any help is greatly appreciated. Thank you! Cheers, Alexander ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=63328#63328 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org