2D waypoints - any example code?

Been writing some code to let my sprites find their way around a track on screen. At present I'm using a color-coded bitmap, but as an alternative I'd like to try and write a waypoint based AI.

I plan to store say 32 waypoints in an array.

I assume I'd take the first 3 points in the array and plot a smooth curve through them.

After the sprite passes the 1st point, I'd load the 4th point in and plot a smooth curve through points 2, 3 & 4 - and so on all around the track.

Is there any sample code kicking around ?

I should add I already have waypoint code running but just uses SIN & COS to plot the angle to the next point

What I want to do is plot a smooth curve through the next point instead.

Have a look at this by "Ross C" - parts of it may be of use to you:

http://www.blitzbasic.com/codearcs/codearcs.php?code=940

thanks for that

i think all he's doing here is working out the angle in between each waypoint.

the implication for me is I would need lots of waypoints to describe a bend in the track

Maybe's I need to study some maths books to work out how to FIT a curve between several waypoints