java - 图像旋转动画

Question

也许是一个简单答案的问题。我正在尝试为一艘船制作动画(小行星风格)。现在我只是在使用 Graphics2D 旋转方法。然而，现在它只是模糊了我的形象。解决这个问题并使其正常工作的最简单方法是什么？ (每次屏幕刷新都会调用getImage方法，每次用户左右键都会调用rotate方法，bi1是之前读入的bufferedimage)

public void rotate(double rot) {
    g = bi1.getGraphics();
    Graphics2D g2d=(Graphics2D)g;
    g2d.rotate(rot, 15, 15);
    g2d.drawImage(bi1, 0, 0, null);     
}

public BufferedImage getImage() {   
    return bi1;
}

Answer 1

尝试使用仿射变换:

  public void paint(Graphics g) {
      // clear off screen bitmap
      super.paint(g);
      // cast graphics to graphics 2D
      Graphics2D g2 = (Graphics2D) g;
      AffineTransform tfm = new AffineTransform();
      tfm.rotate(0,0,0);
      g2.setTransform(tfm);
      g2.drawImage(backImage, 0, 0, this);
      tfm.rotate(Math.toRadians(player.angle+90), player.x+32, player.y+32);
      g2.setTransform(tfm);
      g2.drawImage(tank, player.x, player.y, this);       
  }

http://docs.oracle.com/javase/1.4.2/docs/api/java/awt/geom/AffineTransform.html