Hi
You could use graphics context\window created by another means (that what
osg::GraphicsWindowEmbedded does), but you still should create osgviewer and
stuff. You can check various osgviewer*** examples in osg source tree in
examples directory.
Cheers.
09.09.2012, 03:24, "Dainon Woudstra" <dain...@gmail.com>:
> Hi,
>
> Background:
> I've written an application in C# for various reasons. SharpGL provided the
> OpenGL portion, C# provided the Database, and Intellisense works with it in
> VS 2010. I've rewritten this application in 3 different frameworks and have
> hit issues I could not solve for one reason or another. For example, now that
> my application works and I use it everyday, I'm trying to enhance some of its
> features, such as loading a 3D object and good text rendering.
>
> I've come across OpenSceneGraph and have been trying to use it with the C#
> wrappers. I couldn't get that working and read a bunch of posts providing
> other solutions and mentioning it isn't supported anymore. Thus, I've learned
> to write a wrapper for a C++ OSG DLL to call some native OSG functions.
>
> It works great, except that it doesn't, LOL. The code it fine, I've tested it
> in a sample, non C# application using the viewer and all.
>
> The Question:
> The part that I don't understand is how to use OSG to render in an existing
> OpenGL viewport. Is there a way to attach to the existing OpenGL instead of
> creating the OSG viewer as noted in every OSG example I've seen?
>
> C# SharpGL initialization
>
> Code:
>
> // Initialize SharpGL
> void initSharpGL() {
> openGLControl = new SharpGL.OpenGLControl();
> ((System.ComponentModel.ISupportInitialize)(openGLControl)).BeginInit();
>
> //
> // openGLControl
> //
> openGLControl.BitDepth = 32;
> openGLControl.Dock = System.Windows.Forms.DockStyle.Fill;
> openGLControl.DrawFPS = true;
> openGLControl.FrameRate = 60;
> openGLControl.Location = new System.Drawing.Point(0, 0);
> openGLControl.Name = "openGLControl";
> openGLControl.RenderContextType = SharpGL.RenderContextType.FBO;
> openGLControl.Size = new System.Drawing.Size(1680, 1060);
> openGLControl.TabIndex = 0;
> openGLControl.OpenGLInitialized += new
> System.EventHandler(openGLControl_OpenGLInitialized);
> openGLControl.OpenGLDraw += new
> System.Windows.Forms.PaintEventHandler(openGLControl_OpenGLDraw);
> openGLControl.Resized += new System.EventHandler(openGLControl_Resized);
> openGLControl.Click += new System.EventHandler(OpenGL_Click);
> ((System.ComponentModel.ISupportInitialize)(openGLControl)).EndInit();
> Controls.Add(openGLControl);
>
> ...
> }
>
> Native OSG Code:
>
> Code:
>
> // Create the scene root
> mRoot = new osg::Group;
>
> // The viewer
> mViewer = new osgViewer::Viewer;
> mWindow = mViewer->setUpViewerAsEmbeddedInWindow(0, 0, 1680, 998);
> mViewer->getCamera()->setClearMask(0);
> mViewer->setSceneData(mRoot);
> mViewer->realize();
>
> osg::ref_ptr<osg::Geode> geode = new osg::Geode;
>
> std::string fontFile("arial.ttf");
> font = osgText::readFontFile(fontFile);
> if (font.valid()) {
>
> osgText::Text* text = new osgText::Text;
> if (text != 0) {
> text->setFont(font);
> text->setColor(osg::Vec4(0.0f, 1.0f, 1.0f, 1.0f));
> text->setCharacterSize(40.0f);
> text->setPosition(osg::Vec3(100.0f, 100.0f, 0.0f));
> text->setText("SomeSome!");
>
> text->setLayout(osgText::Text::LEFT_TO_RIGHT);
>
> geode->addDrawable(text);
> }
> }
>
> mRoot->addChild(geode);
>
> The OSG Draw Callback function contents
>
> Code:
>
> mViewer->frame();
>
> Thank you!
>
> Cheers,
> Dainon
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=49871#49871
>
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