移動位圖不平滑，生澀

Question

我的更新方法爲持續更新。

@Override 
public void update(float deltaTime) { 
    Graphics g = game.getGraphics(); 
    List<TouchEvent> touchEvents = game.getInput().getTouchEvents(); 
    game.getInput().getKeyEvents(); 

    redPin.moveX(deltaTime); 

    int len = touchEvents.size(); 
    for (int i = 0; i < len; i++) { 
     TouchEvent event = touchEvents.get(i); 
     if (event.type == TouchEvent.TOUCH_UP) { 
      if (inBounds(event, 0, 360, 800, 120)) { 
       if (gameOver) { 
        // TODO game over methods 
       } else { 
        // TODO game is not over methods 
        level++; 
        blackBacking.randomizeX(); 
        blackBacking.setWidth(level + 1); 
       } 
       return; 
      } 
     } 
    } 
} 

我的位圖類

public class RedPin { 
    private int xTracker = 400; 
    private int x = 400; 
    private int y = 85; 
    private int height = 111; 
    private long speed = 1000; 
    private float deltaTime; 
    private int direction = 1; 

    protected int getX() { 
     if (xTracker <= 86) { 
      x = -10; 
     } else if (xTracker >= 714) { 
      x = -10; 
     } else if (xTracker <= 713 && xTracker >= 87) { 
      x = xTracker; 
     } 
     return this.x; 
    } 

    protected int getY() { 
     if (this.xTracker == 86 || this.xTracker == 714) { 
      this.y = 88; 
     } else if (this.xTracker == 87 || this.xTracker == 713) { 
      this.y = 87; 
     } else if (this.xTracker == 88 || this.xTracker == 89 || this.xTracker == 712 || this.xTracker == 711) { 
      this.y = 86; 
     } else { 
      this.y = 85; 
     } 
     return this.y; 
    } 

    protected int getHeight() { 
     if (this.xTracker == 86 || this.xTracker == 714) { 
      this.height = 104; 
     } else if (this.xTracker == 87 || this.xTracker == 713) { 
      this.height = 105; 
     } else if (this.xTracker == 88 || this.xTracker == 712) { 
      this.height = 106; 
     } else if (this.xTracker == 89 || this.xTracker == 711) { 
      this.height = 107; 
     } else if (this.xTracker == 90 || this.xTracker == 710) { 
      this.height = 109; 
     } else if (this.xTracker == 91 || this.xTracker == 709) { 
      this.height = 110; 
     } else { 
      this.height = 111; 
     } 
     return this.height; 
    } 

    protected void moveX() { 
     if (this.xTracker >= 734) { 
      direction = 1; 
     } else if (this.xTracker <= 66) { 
      direction = -1; 
     } 
     xTracker = (int) direction * ((xTracker + 1)*deltaTime); 
     x = (int) direction * ((x + 1)*deltaTime); 
    } 

} 

g.drawPixmap（Assets.gameRedPin，redPin.getX（），redPin.getY（），0，0，2，redPin.getHeight（））;

當我用x + 1 * deltaTime運行代碼時，會出現一些輕微的動作。 當我把它設置爲x + 2或更高的時候，這個動作就更大了。有沒有什麼方法可以使運動更流暢？

Answer 1

你能記錄deltaTime的值嗎？這可能是因爲刷新速率太低（即20 FPS），或者deltaTime值有很大的變化，這兩者都會導致抖動。另外，如果你在模擬器上測試你的代碼，它肯定會出現問題。