Kbtter5のレーザー実装

LinearLaser.cs

public static OptionSelectionInformation LinearLaserOptionInformation = new OptionSelectionInformation()
{
    Name = "直線レーザー",
    Description = "普通のレーザーです",
    Operation = LinearLaserOption,
    ModeStrings = new[] { "Kbtter5", "魔理沙" },
    UserValueCombination = OptionSelectionValue.Direction | OptionSelectionValue.Mode,
    DefaultValue = new OptionInitializationInformation()
    {
        Direction = OptionDirection.Up,
        Mode = 1,
    }
};

private static IEnumerator<bool> LinearLaserOption(PlayerOption option, OptionInitializationInformation info)
{
    var s = false;
    var ps = false;
    var la = false;
    PlayerLinearLaser ls = null;

    while (true)
    {
        s = option.Parent.IsShottableTiming;
        if (!ps && s)
        {
            la = true;
            ls = new PlayerLinearLaser(option, LinearLaserMarisaStyle, 8, CommonObjects.ImageLaser8)
            {
                Angle = GetAngle(info.Direction) ?? 0,
                X = option.X,
                Y = option.Y
            };
            option.ParentManager.Add(ls, (int)GameLayer.PlayerBullet);
        }
        if (ps && !s)
        {
            la = false;
            ls.AddSubOperation(LaserThrowAway(ls.Angle, 20));
        }
        if (la)
        {
            ls.X = option.X;
            ls.Y = option.Y;
        }
        ps = s;
        yield return true;
    }
}

private static IEnumerator<bool> LinearLaserMarisaStyle(UserSprite par, PlayerLinearLaser laser)
{
    laser.BrightR = (byte)((long)par.SourceUser.Id & 0xFF);
    laser.BrightG = (byte)((long)(par.SourceUser.Id >> 8) & 0xFF);
    laser.BrightB = (byte)((long)(par.SourceUser.Id >> 16) & 0xFF);
    while (true)
    {
        if (laser.Length < 800) laser.Length += 20;
        yield return true;
    }
}

private static CoroutineFunction<MultiAdditionalCoroutineSprite> LaserThrowAway(double angle, double speed)
{
    return sp => LaserThrowAwayFunction(sp, angle, speed);
}

private static IEnumerator<bool> LaserThrowAwayFunction(MultiAdditionalCoroutineSprite sp, double angle, double speed)
{
    while (true)
    {
        sp.X += Math.Cos(angle) * speed;
        sp.Y += Math.Sin(angle) * speed;
        yield return true;
    }
}