My flying shopping cart is completed and flaps its wings. My next 
challenge is to put the cart on a spline and have it fly round a 
predefined path.

I've no idea how to do that!

Firstly I need to define the path. That doesn't seem too hard as it's 
all just beziers.

Secondly, I need to somehow calculate the position on that spline at 
which the cart will sit in each frame. No idea on that one.

Thirdly I need to get the vector of the spline at that point so that I 
can point the cart in the right direction. No idea here either.

Fourthly I need to get the (stationary) camera to follow the cart as it 
travels around the spline. Figure I'll sit the camera at some point and 
point_at the position in the 'secondly' section.

Can anyone talk me through this, or better yet, point me to a simple 
tutorial on how to do it?

Cheers!
Rick

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