Function bezierCubicTangent
Computes cubic Bézier curve tangent
T bezierCubicTangent(T)
(
T a,
T b,
T c,
T d,
T t
);
Computes cubic Bézier curve tangent
T bezierCubicTangent(T)
(
T a,
T b,
T c,
T d,
T t
);