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I want to draw a circle of radius R centered at the origin using Bezier Curve Segments. I have to draw the circle using four Bezier Curve segments - one for each quadrant as shown in the following figure .

enter image description here

How can I find the co-ordinate of four control points for each of the Bezier curve segments ? The basis matrix for Bezier curve is as follows :

$ \begin{bmatrix} -1 & 3 & -3 & 1 \\ 3 & -6 & 3 & 1 \\ -3 & 3 & 0 & 0 \\ 1 & 0 & 0 & 0 \end{bmatrix} $

Way to infinity
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    It's not possible to draw a perfect circle with Bézier curves, but you can get pretty close. See http://math.stackexchange.com/q/754435/856 and http://spencermortensen.com/articles/bezier-circle/ –  Apr 22 '14 at 15:37
  • The distance between each "circular" dot and its adjacent "square" one should be 0.551915024494. All other coordinates are obvious, I suspect. – bubba Apr 24 '14 at 06:24

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