OpenCV Return value from mouse callback function

Question

In OpenCV I want to return the point position like Point(x,y) to the main() function that I　click on the image in the mouse callback function . Is there anyway other than se

Answer 1

to expand Safirs idea there, apart from a class or such, you could just pass in the point itself:

void on_mouse( int e, int x, int y, int d, void *ptr )
{
    Point*p = (Point*)ptr;
    p->x = x;
    p->y = y;
}

Point p;
namedWindow("win");
setMouseCallback("win",on_mouse, (void*)(&p) );

// changed value of p will be accessible here