Point on curve
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Drag 4 blue points to build a Bezier curve
Derivative calculation
Place a point on the curve.
x
—
f(x)
—
h
—
x + h
—
f(x+h)
—
Δf
—
f'(x) ≈ Δf/h
—
h:
0.1
P0, P1, P2, P3 — control points of cubic Bezier