Help on the cardinal spline

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

CristianMori - 25 Nov 2004 13:23 GMT

Hi everyone
I need to know the formula used in .net for the cardinal spline since i need
to generate an array of values of the curve after drawing it.

Thanks

Reply to this Message

Bob Powell [MVP] - 25 Nov 2004 13:38 GMT

You don't need the formula..

Just draw your spline into a GraphicsPath. Flatten the Path using the
Flatten method and then extract the points from the GraphicsPath object
directly.

Signature

Bob Powell [MVP]
Visual C#, System.Drawing

Find great Windows Forms articles in Windows Forms Tips and Tricks
http://www.bobpowell.net/tipstricks.htm

Answer those GDI+ questions with the GDI+ FAQ
http://www.bobpowell.net/faqmain.htm

All new articles provide code in C# and VB.NET.
Subscribe to the RSS feeds provided and never miss a new article.

> Hi everyone
> I need to know the formula used in .net for the cardinal spline since i need
> to generate an array of values of the curve after drawing it.
>
> Thanks

Reply to this Message

Lazarus Lang - 26 Nov 2004 13:14 GMT

> You don't need the formula..
>
> Just draw your spline into a GraphicsPath. Flatten the Path using the
> Flatten method and then extract the points from the GraphicsPath object
> directly.

That's right but if for some other reason you (the OP, that is) DO need the
formulae, I can only advise to buy Charles Petzold's excellent book called
"Windows Programming with C#" (or the newer VB.NET variant) which
contains an entire section on this exact subject. Heck, you can
probably download the source code on his web site (Google !).

eltwo

Reply to this Message

Help on the cardinal spline

Free Magazines