/// <summary>
/// 2Dベクトルの原点中心の回転を行います
/// </summary>
/// <param name="theta"></param>
/// <returns></returns>
public Pos Rotation2DVector(double theta)
{
return(new Pos(
x * Cal.Cos(theta) - y * Cal.Sin(theta),
x * Cal.Sin(theta) + y * Cal.Cos(theta)
));
}
/// <summary>
/// 座標点横軸データの任意の点から縦軸データの線形補間データを返します
/// </summary>
/// <param name="Data"></param>
/// <param name="x"></param>
/// <returns></returns>
public Pos Value(double x)
{
var result = new Pos(x, double.NaN);
for (int i = 0; i < Data.Count - 1; i++)
{
if (Data[i].x <= x && x < Data[i + 1].x)
{
result.y = Cal.Lerp(Data[i], Data[i + 1], x);
}
}
if (Data[Data.Count - 1].x == x)
{
result = Data[Data.Count - 1];
}
//できなかったらNaNを投げる
return(result);
}
/// <summary>
/// 回転
/// </summary>
public static Pos Rotation(double theta)
{
return(new Pos(Cal.Cos(theta), Cal.Sin(theta)));
}
