The title says it all.....probably, I think. Too much, maybe?
Anyway, you can control the movements of the stars using keyboard or mouse...
'===================== C O N T R O L S ======================
' Keyboard Input:
' C.............Center the Black Hole
' Space......Center the Black Hole + stop all movement
' Enter.. .....Stars are sucked in; no other movement
' R..............Reverse the rotation
' T..............Toggle twisting/spiral motion
' V..............Reverse stars going in/out (vacuum/vent)
' H.............Toggle hole's halo/glow
' +/-...........Increase/decrease size of hole
' Mouse Button - Outside of Hole:
' Left button.......Increase anticlockwise rotation
' Right button.....Increase clockwise rotation
' Mouse Button - Inside of Hole:
' Button click + drag will move the Black Hole to any place
' on screen, but moving mouse too fast will drop the hole.
' Mouse Wheel:
' Forward..........Increase vacuum speed (or slow vent rate)
' Reverse..........Decrease vacuum speed (or speed vent rate)
' Click...............Stop all movement w/o centering
'==============================================================
As usual, my code is messy, but it seems to run all right.