Quadratic bezier curve: Y coordinate for a given X ?

Posted by stefan.at.wpf on Stack Overflow See other posts from Stack Overflow or by stefan.at.wpf
Published on 2010-03-31T00:48:31Z Indexed on 2010/03/31 0:53 UTC
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bezier

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bezier-curve

Hello,

I have a quadratic bezier curve and I need the Y coordinate of a point on the bezier curve for a given X coordinate. I know that in pure maths this can be easily done, but I'm wondering is there's a simple / another way for this in C# / WPF? Is it possible to get the single points used by C# / WPF for drawing the bezier curve and then maybe just loop them and compare the X coordinate of each point with the given X coordinate? BTW for the mathematical way it would be good to know which step for the parameter t of the bezier curve has been choosen by C# / WPF? Any chance to find this out? Probably t is just scaled by / steps for t are 1/(distance of P0 and P2) ? Thank you very much for any hint!

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