gistfile1.cs

public class Node
{
    public void MoveEular(double dt, Vector f)
    {
        // 質量は1とする
        this.R = new Vector()
        {
            X = this.R.X + dt * this.V.X,
            Y = this.R.Y + dt * this.V.Y
        };
        this.V = new Vector()
        {
            X = this.V.X + dt * f.X,
            Y = this.V.Y + dt * f.Y
        };
    }
}