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50 
51 #ifndef GLWIDGET_H
52 #define GLWIDGET_H
53 
54 #include <QOpenGLWidget>
55 #include <QOpenGLFunctions>
56 #include <QOpenGLBuffer>
57 
58 QT_FORWARD_DECLARE_CLASS(QOpenGLShaderProgram);
QT_FORWARD_DECLARE_CLASS(QOpenGLTexture)59 QT_FORWARD_DECLARE_CLASS(QOpenGLTexture)
60 
61 class GLWidget : public QOpenGLWidget, protected QOpenGLFunctions
62 {
63     Q_OBJECT
64 
65 public:
66     using QOpenGLWidget::QOpenGLWidget;
67     ~GLWidget();
68 
69     QSize minimumSizeHint() const override;
70     QSize sizeHint() const override;
71     void rotateBy(int xAngle, int yAngle, int zAngle);
72     void setClearColor(const QColor &color);
73 
74 signals:
75     void clicked();
76 
77 protected:
78     void initializeGL() override;
79     void paintGL() override;
80     void resizeGL(int width, int height) override;
81     void mousePressEvent(QMouseEvent *event) override;
82     void mouseMoveEvent(QMouseEvent *event) override;
83     void mouseReleaseEvent(QMouseEvent *event) override;
84 
85 private:
86     void makeObject();
87 
88     QColor clearColor = Qt::black;
89     QPoint lastPos;
90     int xRot = 0;
91     int yRot = 0;
92     int zRot = 0;
93     QOpenGLTexture *textures[6] = {nullptr, nullptr, nullptr, nullptr, nullptr, nullptr};
94     QOpenGLShaderProgram *program = nullptr;
95     QOpenGLBuffer vbo;
96 };
97 
98 #endif
99