Bézier curve formation following de Casteljau’s algorithm.

<p>Shown are the (top-level) control points and the recursive control points , , and . Number of sampling points is set at <i>τ</i> = 3. For clarity, intervals and are not shown, except for <i>β</i>⁽³⁾ in panel <b>d</b>. The four figure panels show the sequential application of the algorithm: top-left <b>(a)</b>: ; top-right <b>(b)</b>: ; bottom-left <b>(c)</b>: ; and bottom-right <b>(d)</b>: .