我已经尝试了很多教程,我似乎无法获得双缓冲工作。这是我的主要(update()方法是我试过的代码,但我仍然看到闪烁):
public class Main extends JApplet implements Runnable {
private static final long serialVersionUID = 1L;
private static int width = 900;
private static int height = 600;
public static int fps = 60;
public Thread thread = new Thread(this);
private Image dbImage;
private Graphics dbg;
public static Ailoid ailoid = new Ailoid();
// Initialize
public void init() {
setSize(width, height);
setBackground(Color.white);
ailoid.setLocation(new Location(100, 100));
AlienManager.registerAlien(ailoid);
}
// Paint graphics
public void paint(Graphics g) {
super.paint(g);
g.setColor(Color.green);
for (Alien alien : AlienManager.getAliens()) {
Location loc = alien.getLocation();
int x = loc.getX();
int y = loc.getY();
g.fillRect(x, y, 10, 20);
}
}
// Update graphics for double buffering
public void update(Graphics g) {
if (dbImage == null) {
dbImage = createImage (width, height);
dbg = dbImage.getGraphics();
}
dbg.setColor (getBackground ());
dbg.fillRect (0, 0, width, height);
dbg.setColor (getForeground());
paint (dbg);
g.drawImage (dbImage, 0, 0, this);
}
// Thread start
@Override
public void start() {
thread.start();
}
// Thread stop
@Override
public void destroy() {
thread = null;
}
// Thread run
@Override
public void run() {
while (thread != null) {
Updater.run();
repaint();
try {
// 1000 divided by fps to get frames per millisecond
Thread.sleep(1000 / fps);
}
catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
如果有人可以提供帮助,我们将不胜感激!
答案 0 :(得分:0)
不是逐个绘制对象,而是在image
上绘制它们,然后告诉renderer
绘制整个image
。这消除了 闪烁 。
这是 示例 ,了解如何完成it。
class DoubleBufferedCanvas extends Canvas {
public void update(Graphics g) {
Graphics offgc;
Image offscreen = null;
Dimension d = size();
// create the offscreen buffer and associated Graphics
offscreen = createImage(d.width, d.height);
offgc = offscreen.getGraphics();
// clear the exposed area
offgc.setColor(getBackground());
offgc.fillRect(0, 0, d.width, d.height);
offgc.setColor(getForeground());
// do normal redraw
paint(offgc);
// transfer offscreen to window
g.drawImage(offscreen, 0, 0, this);
}
}