public double GetDerivative(double t)
{
if (Math.Abs(P) < Precision.DOUBLE_EPSILON)
{
return(_linearDegenerate.GetDerivative(t));
}
var p = -MathHelper.Clamp(P, -1, 1) * 10;
return(t < 0.5 ? Derivative(2 * t, p) : Derivative(2 - 2 * t, p));
}
public double GetDerivative(double t)
{
if (Math.Abs(P) < Precision.DOUBLE_EPSILON)
{
return(_linearDegenerate.GetDerivative(t));
}
var p = -MathHelper.Clamp(P, -1, 1) * 10;
return(p * Math.Log(2) * Math.Pow(2, p * t) / (Math.Pow(2, p) - 1));
}
public double GetDerivative(double t)
{
if (Math.Abs(P) < Precision.DOUBLE_EPSILON)
{
return(_linearDegenerate.GetDerivative(t));
}
var p = MathHelper.Clamp(P, -1, 1) * 7;
return(Math.Exp(p) / Math.Pow(t * (Math.Exp(p) - 1) + 1, 2));
}
public double GetDerivative(double t)
{
if (Math.Abs(P) < Precision.DOUBLE_EPSILON)
{
return(_linearDegenerate.GetDerivative(t));
}
var p = MathHelper.Clamp(P, -1, 1);
var b = 2 * Math.Acos(1 / (Math.Sqrt(2) * Math.Abs(p) - Math.Abs(p) + 1));
return(p < 0 ?
Derivative(1 - t, b) :
Derivative(t, b));
}