敵は横に移動して画面端で折り返す

Question

c#で
画面端にとどけば次の弾が撃てる
敵は横に移動して画面端で折り返す
この2つの処理をしたくて1日考えていたのですが
今まで敵の処理はrandomを採用してきたので
全くわかりません
良ければ知恵をお貸しください

class GamePlay : IScene
{

private bool isEnd;//終了フラグ

private InputState input;
private CharacterControl characterControl;
private Random rand = new Random();
protected bool isDead = false;
public void Update()
{

if (Enemy.Length ==  1)
{
isEnd = true;
}
if(characterControl.IsPlayerDead())
{
isEnd = true;
}

if (rand.Next(60) == 0)
{
var position = new Vector2((Screen.Width + 32.0f), (float)rand.Next(45 - 40, Screen.Height - 50));
characterControl.Add(new Enemy(position));
}

if (characterControl.IsPlayerDead())
{
Initialize();
}

characterControl.Update();
}
public GamePlay(InputState input)
{

this.input = input;

}

public void Draw(Renderer renderer) 
{

characterControl.Draw(renderer);

{

}
//renderer.End();
}
public void Shutdown()
{

}
public void Initialize()
{
//シーン終了フラグを初期化
this.isEnd = false;
characterControl = new CharacterControl();
characterControl.Initialize();
characterControl.Add(new Player(input));

}
public bool IsEnd()
{
return this.isEnd;
}
public Scene Next()
{

return Scene.GameOver;
}

class CharacterControl
{
private LinkedList<Character> characters;

public CharacterControl() { }
public void Initialize()
{
if (characters != null)
{
characters.Clear();
}
characters = new LinkedList<Character>();
}
public bool Add(Character character)
{
characters.AddLast(character);
return true;
}
public void Update()
{
foreach (Character c in characters)
{
c.Update();
}
New();
Hit();
Remove();
}
private void New()
{

var newCharacters = new List<Character>();
foreach (Character c in characters)
{
Character newCharacter = c.New();
if (newCharacter != null)
{
newCharacters.Add(newCharacter);
}
}
foreach (Character c in newCharacters)
{
characters.AddLast(c);
}
}
private void Hit()
{
foreach (Character c1 in characters)
{
foreach (Character c2 in characters)
if (c1.Collision(c2))
{
c1.Hit(c2);
c2.Hit(c1);
}
}
}
private void Remove()
{
LinkedListNode<Character> node = characters.First;
while (node != null)
{
LinkedListNode<Character> next = node.Next;
if (node.Value.IsDead())
{
characters.Remove(node);
}
node = next;
}
}
public bool IsPlayerDead()
{
foreach (Character c in characters)
{
if (c is Player)
{
return false;
}
}
return true;
}
public void Draw(Renderer renderer)
{
foreach (Character c in characters)
{
//renderer.Begin();
c.Draw(renderer);
//renderer.Begin();
}
}

}

class Enemy : Character 
{

public Enemy(Vector2 position)
: base("敵", new Vector2(350f, 50.0f), 32.0f)
{

}
public override void Update()
{
position = position + new Vector2(-9.0f, 0.0f);
if (position.X < (-9.0f - 55.0f))
{
isDead = true;
}

}
public override void Hit(Character character)
{
if (character is Bullet || character is Player)
{
isDead = true;
}

}
public override Character New()
{
return null;
}
}

abstract class Character
{
protected string name;
protected Vector2 position;
protected float radius;
protected bool isDead = false;

public abstract void Update();
public abstract void Hit(Character character);

public abstract Character New();

public Character(string name, Vector2 position, float radius)
{
this.name = name;
this.position = position;
this.radius = radius;

}
public void Draw(Renderer renderer)
{
//renderer.Begin();

renderer.DrawTexture(name, position - new Vector2(radius, radius));

//renderer.End();
}
public bool IsDead()
{
return isDead;
}
public bool Collision(Character character)
{
if (Vector2.Distance(this.position, character.position) <= (this.radius + character.radius))
{
return true;
}
return false;
}

}

}
コード

Comments

[y_waiwai]

コードを提示しましょう
いきなり敵と言われても意味不明です

[y_waiwai]

コードが見づらいので、質問を編集し、<code>ボタンで出てくる’’’の枠の中にコードを貼り付けてください

Answer 1

Updateメソッドに

bool returned = false;
bool canShoot = true;

を追加し、同じく

if(returned)
{
    if(position.X < /*画面の左端の座標*/)
    {
        returned = false;
        canShoot = true;
    }
    position = position + new Vector2(-9.0f, 0.0f);
}
else
{
    if(position.Y > /*画面の右端の座標*/)
    {
        returned = true;
        canShoot = true;
    }
    position = position + new Vector3( 9.0f, 0.0f);
}

とすればいいのではないですか?(弾を打つ際はcanShootフラグがtrueであるか確認する処理も追加してください)