bezierTangentVector2

Computes cubic Bézier curve tangent in 2D space

Vector!(T, 2)
bezierTangentVector2
(
T
)
(
Vector!(T, 2) a
,
Vector!(T, 2) b
,
Vector!(T, 2) c
,
Vector!(T, 2) d
,
T t
)

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