Started refactoring examples and got DecodeOnGPUExample working.

examples/common/OpenGLWidget.cpp

@@ -121,6 +121,8 @@ void OpenGLWidget::initializeGL()
 
 	// Initial setup of camera.
 	setupWorldToCameraMatrix();
+
+	initialize();
 }
 
 void OpenGLWidget::resizeGL(int w, int h)

examples/common/OpenGLWidget.h

@@ -136,6 +136,10 @@ protected:
 	void resizeGL(int w, int h);
 	void paintGL();
 
+	virtual void initialize()
+	{
+	}
+
 private:
 
 	void setupWorldToCameraMatrix();