I've derived from QGLWidget before, like so: class MyGLWidget : public QGLWidget { public: // stuff... virtual void initializeGL() { /* my custom OpenGL initialization routine */ } // more stuff... }; However, I find that if I try to initialize a QGraphicsView with my custom QGLWidget as the viewport, initializeGL doesn't g...
Hi all, I'm new here, and have a question about opengl in Qt4, which I've been learning over the last few months. Particularly, I'm seeking advice on the best way to compose a scene in a good object-oriented fashion using the QGLWidget. I'd ideally like every item in my scene to be sub-classes of a super 'Entity' class. Then in my main...
Hi, how to show a context menu when you right click within a QGLWidget? ...
Hi I am trying to display HUD over my 3D game. For starters, I am just trying to display "Hello World", but I haven't had any success yet! The scene freezes / flickers once I am done. I am using Qt/C++ and QGLWdiget / QPainter to get this done. I have used overpainting example as my reference to get started. Here is what I do: overri...
I'm starting off QT 4.6's example "OpenGL - 2D painting" It uses a subclass of QGLWidget, and makes painting operations with the class QPainter. I'd like to know how to do drawing directly with OpenGL functions on the OpenGL Widget. ...
Greetings all, Does simply subclassing QGLWidget and reimplementing paintEvent() make use of OpenGL and hardware acceleration? I create a QPainter and draw QImages in this paintEvent(). What happen inside the paintEvent() method of QGLWidget? Does it convert the images(QImage,QPixmap) into OpenGL textures? Does it use hardware acceler...
I have an app that is a single QGlwidget with a right-click QMenu created when needed. The data is drawn in an overridden paintEvent() But in fullscreen mode the menu isn't displayed. Am I better having a QGraphicsScene as the parent window and a QGlWidget as the sole child? ...
I'm developing a cross-platform application and am not very familiar with the Mac platform. I use Qt for the GUI. I use a QGLWidget to make sure the drawing (with QPainter) is done in OpenGL. My project built fine in XCode and runs. However, drawing is slow as hell, in situations where on Windows and Linux machines speed is not an issue...
I am new to OpenGL and Qt, and I am learning both simultaneously(3 days already:). I couple of years ago I did some exmerimenting with DirectX and I clearly remember that it was possible to make a full-screen window there. By full-screen I mean really full-screen, even without the top part where you have the close fullscreen and minimize...