protected abstract Vector Sub(Vector v);
/// <summary>
/// Δt 分更新。
/// </summary>
/// <param name="dt">Δt</param>
public void Update(double dt)
{
if (this.f == null)
return;
/* ガウス法
this.q += dt * this.f.GetValue(this.q);
// */
/* 中点法
Vector k;
k = dt * this.f.GetValue(this.q);
k = dt * this.f.GetValue(this.q + k / 2);
this.q += k;
// */
//* ルンゲクッタ法
Vector k1, k2, k3, k4;
k1 = dt * this.f.GetValue(this.q);
k2 = dt * this.f.GetValue(this.q + k1 / 2);
k3 = dt * this.f.GetValue(this.q + k2 / 2);
k4 = dt * this.f.GetValue(this.q + k3);
this.q += (k1 + 2 * (k2 + k3) + k4) / 6;
// */
}
protected abstract Vector Add(Vector v);
public DynamicalSystem(VectorFunction f, Vector initQ)
{
this.q = initQ;
this.f = f;
}