/// <summary>
/// 進行度合から移行度合を取得
/// </summary>
/// <param name="Progress">進行度合</param>
/// <returns>移行度合</returns>
public float Evaluate(float Progress)
{
//ニュートン法による近似
float t = CGHelper.Clamp(Progress, 0, 1);
float dt;
do
{
dt = -(fx(t) - Progress) / dfx(t);
if (float.IsNaN(dt))
{
break;
}
t += CGHelper.Clamp(dt, -1f, 1f); //大幅に移動して別の解に到達するのを防止する用
} while (Math.Abs(dt) > Epsilon);
return(CGHelper.Clamp(fy(t), 0f, 1f)); //念のため、0-1の間に収まるようにした
}
/// <summary>
/// Advanced degree from a transition degree
/// </summary>
/// <param name="Progress">Advanced degree</param>
/// <returns>Transition degree</returns>
public float Evaluate(float Progress)
{
//Newton method approximation
float t = CGHelper.Clamp(Progress, 0, 1);
float dt;
do
{
dt = -(fx(t) - Progress) / dfx(t);
if (float.IsNaN(dt))
{
break;
}
t += CGHelper.Clamp(dt, -1f, 1f); //To prevent moving dramatically, reaching a different solution for
} while (Math.Abs(dt) > Epsilon);
return(CGHelper.Clamp(fy(t), 0f, 1f)); //Just in case the fit between 0-1.
}