QBezier.tangent C# (CSharp) Method

public static tangent ( float a, float b, float c, float t ) : float
a	float
b	float
c	float
t	float
return	float

    public static float tangent(float a, float b, float c, float t)
    {
        return 2 * (t * (a + c - 2 * b) - a + b);
    }

QBezier