Sharing vectors between classes

I have a pointcloud class that stores points:

Code:

---

class pointCloud : public QObject
{
    Q_OBJECT
public:
    explicit pointCloud(QObject *parent = 0);
 
signals:
 
public slots:
 
    void addPoint(float x, float y, float z);
 
private:
 
    struct point {
 
        float x;
        float y;
        float z;
 
    };
 
 
    std::vector<point> points;    
};

---

i create point cloud:

pointCloud pointcloud;

and filled the vector with points.

I now want to pass this vector to a QGLWidget for display.

Whats the best way to share this data?

Thanks,

Dubstar_04

Any way that makes sense for your application and is valid C++ is good. There is not single "best" answer to a broad general question.

I have tried passing the pointcloud object as a pointer and a reference and i couldn't get either to work.

would it be best to pass just the points vector?

The QGLWidget shouldn't alter the points data, just display it. i have read that a const vector by reference should be used, but i am a little out of my depth here.

Thanks for any tips,

Dubstar_04