需要继承的两个类

#include <QOpenGLWidget>
#include <QOpenGLFunctions_3_3_Core>

class OpenGLWidget : public QOpenGLWidget,public QOpenGLFunctions_3_3_Core
{
    Q_OBJECT
public:
    explicit OpenGLWidget(QWidget *parent = nullptr);
    virtual void initializeGL() override;
    virtual void resizeGL(int w, int h) override;
    virtual void paintGL() override;
signals:

};

需要Override的三个函数

    virtual void initializeGL() override;
    virtual void resizeGL(int w, int h) override;
    virtual void paintGL() override;