XNA SpriteSheet不起作用

Question

我添加了逻辑来显示Sprite动画，但它并没有显示在屏幕上。我究竟做错了什么？

using Microsoft.Xna.Framework; 
using Microsoft.Xna.Framework.Content; 
using Microsoft.Xna.Framework.Graphics; 
using Microsoft.Xna.Framework.Input.Touch; 

namespace MyXNAGame.Game_Classes 
{ 
    public class Player : Sprite 
    { 
    private int _frameCount = 6; 
    private int _frameIndex; 
    private Rectangle[] _frames; 
    public float _jumpVelocity = 12f; 
    public PlayerState _playerState; 

    public Rectangle BoundingBox 
    { 
     get { return new Rectangle {X = (int) Position.X, Y = (int) Position.Y, Height = Texture.Height, Width = Texture.Width}; } 
    } 

    public void Initialize() 
    { 
     _frames = new Rectangle[_frameCount]; 
     int width = Texture.Width/_frameCount; 
     for (int i = 0; i < _frameCount; i++) 
     { 
      _frames[i] = new Rectangle(i*width, 0, width, Texture.Height); 
     } 
    } 

    public void Load(ContentManager contentManager, string assetName) 
    { 
     Texture = contentManager.Load<Texture2D>(assetName); 
    } 

    public void Update(GameTime gameTime) 
    { 
     while (TouchPanel.IsGestureAvailable) 
     { 
      GestureSample gestureSample = TouchPanel.ReadGesture(); 
      if (gestureSample.GestureType == GestureType.Tap) 
      { 
       if (_playerState == PlayerState.Running) 
       { 
        _playerState = PlayerState.NormalJump; 
       } 
      } 
      if (gestureSample.GestureType == GestureType.Hold) 
      { 
       if (_playerState == PlayerState.Running) 
       { 
        _playerState = PlayerState.LongJump; 
       } 
      } 
     } 

     // NormalJump Logic 
     switch (_playerState) 
     { 
      case PlayerState.NormalJump: 
       Position.Y -= _jumpVelocity; 
       _jumpVelocity -= 0.5f; 
       if (_jumpVelocity == 0) 
       { 
        _playerState = PlayerState.Falling; 
       } 
       break; 
      case PlayerState.LongJump: 
       Position.Y -= _jumpVelocity; 
       _jumpVelocity -= 0.5f; 
       if (_jumpVelocity == 0) 
       { 
        _playerState = PlayerState.Falling; 
       } 
       break; 
      case PlayerState.Falling: 
       Position.Y += _jumpVelocity; 
       _jumpVelocity += 0.5f; 
       break; 
      case PlayerState.Running: 
       _frameIndex++; 
       if (_frameIndex > 5) 
       { 
        _frameIndex = 0; 
       } 

       break; 
     } 
    } 

    public void Draw(SpriteBatch spriteBatch) 
    { 
     spriteBatch.Draw(Texture, Position, _frames[_frameIndex], Color.White, 0, new Vector2(0, 0), new Vector2(0, 0), SpriteEffects.None, 0); 
    } 
} 

}`

任何人都可以看到明显的错误呢？我正在使用WP7

Answer 1

我将Draw（）方法中的'Scale'参数从新的Vector（0,0）更改为新的Vector（1,1），很明显，Scale的值为0时不会显示任何内容所有。