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40 
41 #ifndef MAINWIDGET_H
42 #define MAINWIDGET_H
43 
44 #include <QtOpenGL/QGLWidget>
45 #include <QtOpenGL/QGLFunctions>
46 
47 #include <QMatrix4x4>
48 #include <QQuaternion>
49 #include <QVector2D>
50 
51 QT_BEGIN_NAMESPACE
52 class QBasicTimer;
53 class QGLShaderProgram;
54 QT_END_NAMESPACE
55 
56 class GeometryEngine;
57 
58 class MainWidget : public QGLWidget, protected QGLFunctions
59 {
60     Q_OBJECT
61 public:
62     explicit MainWidget(QWidget *parent = 0);
63     virtual ~MainWidget();
64 
65 signals:
66 
67 public slots:
68 
69 protected:
70     void mousePressEvent(QMouseEvent *e);
71     void mouseReleaseEvent(QMouseEvent *e);
72     void timerEvent(QTimerEvent *e);
73 
74     void initializeGL();
75     void resizeGL(int w, int h);
76     void paintGL();
77 
78     void initShaders();
79     void initTextures();
80 
81 private:
82     QBasicTimer *timer;
83     QGLShaderProgram *program;
84     GeometryEngine *geometries;
85 
86     GLuint texture;
87 
88     QMatrix4x4 projection;
89 
90     QVector2D mousePressPosition;
91     QVector3D rotationAxis;
92     qreal angularSpeed;
93     QQuaternion rotation;
94 };
95 
96 #endif // MAINWIDGET_H
97