Parametric Curves

Curve type

Bézier (de Casteljau) B-spline (uniform) NURBS (rational)

Degree (splines): 3 Parameter t: 0.50 Selected weight (NURBS): 1.00

Show control polygon Show de Casteljau Colour curve by t Show knot vector

Preset

Stats

Curve typeBézier

Control points4

Degree3

Parameter t0.50

Knots—

Selected point—

Selected weight—

Drag the hollow squares to reshape the curve. Click a point to select it (the weight slider then acts on it in NURBS mode). Bézier uses the recursive de Casteljau scaffold; B-spline and NURBS use the Cox–de Boor basis with a uniform clamped knot vector. Raising a NURBS weight pulls the curve toward that point — the circle preset shows NURBS representing an exact conic.