Question

我正在使用XNA创建Space Invaders副本。因此，我使用相同的逻辑在自己的类中设置了许多精灵的动画，但是对于大多数变量使用不同的值。这是我从spritesheets制作动画的方式：

Texture2D playerTex;
Vector2 playerPos = new Vector2(x, y), playerOrigin;
Rectangle playerHitBox;
float animationTimer = 0f, animationInterval = 100f;
int currentFrame = 1, frameWidth = example number, frameHeight = example number 2;

public void LoadContent(ContentManager Content)
{
    playerTex = Content.Load<Texture2D>("ship");
}

public void Update(GameTime gameTime)
{
    playerHitBox = new Rectangle(currentFrame * frameWidth, 0, frameWidth, frameHeight);
    playerOrigin = new Vector2(playerHitBox.X / 2, playerHitBox.Y / 2);
    animationTimer += (float)gameTime.ElapsedGameTime.Milliseconds;
    if (animationTimer > animationInterval)
    {
        currentFrame++;
        animationTimer = 0f;
    }

    if (currentFrame == 2)
    {
        currentFrame = 0;
    }
    playerHitBox = new Rectangle(currentFrame * frameWidth, 0, frameWidth, frameHeight);
    playerOrigin = new Vector2(playerHitBox.Width / 2, playerHitBox.Height / 2);
}

public void Draw(SpriteBatch spriteBatch)
{
    spriteBatch.Draw(playerTex, playerPos, playerHitBox, Color.White, 0f, Vector2.Zero, 1.0f, SpriteEffects.None, 0);
}

不是将这个逻辑用于它自己的类中的每个动画对象，而是寻找一种创建精灵类的方法，并使用精灵的Update() / Draw()继承。这样的事情对Draw()方法来说是一个好方法吗？

    public void Draw(Texture2D spriteTex, Vector2 spritePos, Nullable<Rectangle> spriteSourceRect, Color spriteColor, Single spriteRotation, Vector2 spriteOrigin, Vector2 spriteScale, SpriteEffects spriteEffects, Single spriteLayerDepth, SpriteBatch spriteBatch)
    {
        if (spriteTex != null)
        {
            spriteBatch.Draw(spriteTex, spritePos, spriteSourceRect, spriteColor, spriteRotation, spriteOrigin, spriteScale, spriteEffects, spriteLayerDepth);
        }
    }

Answer 1

你可以：

创建Sprite类以保留常见的动画属性，如纹理，持续时间和当前索引。
为位置，健康等自定义数据创建Invider类。
创建一个集合来存储游戏类中每个对象的自定义数据。

例如：

class Sprite
{
    public Texture2D texture;
    public Rectangle Frame;
    private frameIndex;
    private frameCount;
    private frameDuration;
    private frameInterval;

    public Sprite(Texture pTexture, ...)
    {
        // init sprite data
    }
    public Update(GameTime pGameTime)
    {
        // update sprite data
    }
}

class Invider
{
    private Sprite Sprite;
    public Vector2 Porision;
    public int Health;

    public Invider(Sprite pSprite, Vector2 pPosition)
    {
        this.Sprite = pSprite;
        this.Position = pPosition;
    }
    public void Update(GameTime pGameTime)
    {
        // update invider data
    }
    public void Draw(SpriteBatch pSpriteBatch)
    {
        pSpriteBatch.Draw(this.Sprite.Texture, this.Sprite.Frame, this.Position, Color.White);
    }
}

public class Game1 : Game
{
    private SpriteBatch spriteBatch;
    private Dictionary<int, Invider> invidersByID;
    private Sprite inviderSprite;

    public override Initialize()
    {
        // fill inviderByID collection
    }

    public override LoadData()
    {
        // create inviderSprite
    }

    public static UpdateStatic(GameTime pGameTime)
    {
        // update static data like frame index
    }
    public override void Update(GameTime pGameTime)
    {
        this.inviderSprite.Update(pGameTime);

        foreach(Invider invider in invidersByID.Values){
        {
            invider.Update(pGameTime);
        }
    }
    public override Draw(SpriteBatch pSpriteBatch)
    {
        this.spriteBatch.Begin();
        foreach(Invider invider in invidersByID.Values){
        {
            invider.Update(pGameTime);
        }
        this.spriteBatch.End();
    }
}

如何创建一个精灵类来防止一直重复相同的代码？

1 个答案: