Hi,(adsbygoogle = window.adsbygoogle || []).push({});

I'm trying to draw a Cardinal Spline and understand them - however I can't get my head around the formula.

Now, after lots of research I keep coming back to this formula:

Ti = a * (Pi+1 - Pi-1 )

taken from this page(there's a similar one on Wikipedia): http://cubic.org/docs/hermite.htm

However I don't understand how that formula can provide a tangent. In the past all the formulae I have used have been of function types where I'd put through say the X co-ordinate and it would tell me the Y co-ordinate.

Can someone please provide a better explanation as to how I use it please?

Thanks in advance,

Michael

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# Cardinal Splines

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