Hi Ying, It's not possible to pinpoint what is wrong as you provide no guidance of how you set up your osg::Geometry. My best guess would be that you don't set up the texture coordinates.
Have a look at the osgshaders example for inspiration, Robert. On 5 August 2014 16:31, ying song <[email protected]> wrote: > Hello everyone, > > I tried texturing a cube by using shaders, but failed. I already tried all > the way I could think about, but the rendered cube is still totally black > if I use shaders. Could someone help me on this? > > Here is mycode: > cpp file: > osg::ref_ptr<osg::Image> image = > osgDB::readImageFile("Images/reflect.rgb"); > osg::ref_ptr<osg::Node> node = createNode(); //create the cube > > osg::StateSet* squareState = node->getOrCreateStateSet(); > osg::Program* squareProgramObject = new osg::Program; > osg::Shader* squareVertexObject = new osg::Shader( > osg::Shader::VERTEX ); > osg::Shader* squareFragmentObject = new osg::Shader( > osg::Shader::FRAGMENT ); > squareProgramObject->addShader( squareFragmentObject ); > squareProgramObject->addShader( squareVertexObject ); > squareVertexObject->loadShaderSourceFromFile( > "shaders/cubeRender.vert"); > > squareFragmentObject->loadShaderSourceFromFile("shaders/cubeRender.frag"); > squareState->setAttributeAndModes(squareProgramObject, > osg::StateAttribute::ON); > > osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D(); > texture->setImage(image.get()); > > texture->setFilter(osg::Texture::MIN_FILTER,osg::Texture::NEAREST_MIPMAP_NEAREST); > //choose the nearest texture unit value > texture->setFilter(osg::Texture::MAG_FILTER,osg::Texture::LINEAR); > //choose the average of the nearest 4 pixel values as texture > > osg::Uniform* myTextureU = new > osg::Uniform("myTexture",texture.get()); > squareState->addUniform(myTextureU); > > viewer->setSceneData(node.get()); > > vertex shader: > > void main() > { > > gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; > gl_TexCoord[0] = gl_MultiTexCoord0; > } > > fragment shader: > uniform sampler2D myTexture; > > void main() > { > vec4 color = texture2D(myTexture, gl_TexCoord[0].st); > gl_FragColor = color; > } > > Thanks a lot! > > Cheers, > ying[/b] > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=60539#60539 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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