(3-D) Get datapoints in currently zoomed view (3-D)

Hi ,
Is there any way I can get data points info when I zoom into 3-D Scatter plots .
Like when I zoom in , if I can get handle of some object which can help know how many data points are present in current view/scene .

Relayout gives me handle of camera object , I tried altering the return (in library file) and sent the whole object instead of just ‘camera’ , but no joy .

Thanks .
