Cos & Sin in Pascal

Hi!

Looking for good routines to plot images on screen with BP7...(with cos &
sin). The scene I like to do (often seen...):

3d circles that look like a drop of water which has hit the watersurface.
Simply 'ripples' ... The highest curve in the middle and smaller the
further you reach the edge...

Uhmm.... Did you understand?

/Anders Kallander //m-15...@mailbox.swipnet.se