glwidget.h

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#ifndef GLWIDGET_H
#define GLWIDGET_H

#include <QGLWidget>
#include <QList>
#include <QVector3D>
#include <QColor>
#include <QKeyEvent>
#include <QVector>

typedef QVector3D QVertex;

struct Pendulum
{
    GLuint glQuadric;
    qreal phase_offset;// added to the time variable
    qreal radius;
    qreal cord_length;
    qreal theta0;
    bool hovered;
    QVertex pt;
    GLfloat reflectance[4];
};

struct MySphere
{
    QVertex center;
    GLfloat reflectance[4];
    GLuint glQuadric;
    qreal radius;
};

class GLWidget : public QGLWidget
{
    Q_OBJECT

public:
    GLWidget(QWidget *parent = 0);
    ~GLWidget();

    int xRotation() const { return xRot; }
    int yRotation() const { return yRot; }
    int zRotation() const { return zRot; }

public slots:
    void setXRotation(int angle);
    void setYRotation(int angle);
    void setZRotation(int angle);

signals:
    void xRotationChanged(int angle);
    void yRotationChanged(int angle);
    void zRotationChanged(int angle);

protected:
    void initializeGL();
    void paintGL();
    void resizeGL(int width, int height);
    void mousePressEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);
    void wheelEvent(QWheelEvent *);
    void keyReleaseEvent(QKeyEvent * e)
    {
        if(e->key() == Qt::Key_Space)
            m_time = -.2;
    }

private slots:
    void advanceGears();

private:
    QVertex center;
    GLuint makePendulum(Pendulum p);
//    void drawPendulum(GLuint gear, GLdouble dx, GLdouble dy, GLdouble dz,
//                  GLdouble angle);

    GLuint makeSphere(MySphere s);
    void drawSphere(MySphere s);

    void drawPendulum(Pendulum p,
                  GLdouble angle);
    void normalizeAngle(int *angle);
    void setReflectance(GLfloat * glcolor, QColor color);

    QList <Pendulum *> pen;
    QVector < QVector < QVector< MySphere *> > > spheresInSpace;
    QList <MySphere *> allSpheres;
    int xRot;
    int yRot;
    int zRot;
    int timeBasedVar;
    int zoomFactor;
    qreal m_panX;
    qreal m_panY;
    qreal m_time;

    QPoint lastPos;
};

#endif