我在为我的游戏构建基本游戏循环时遇到了麻烦。我处于早期阶段,我想做的就是以恒定的速度(例如:3)将球移动通过屏幕底部。球的位置在主面板更新方法中更新,并在渲染部分按预期绘制。机制没有什么特别的。球移动但绝对不流畅,视觉安静令人不安。我测量了这些方法的执行时间,这对夫妇的总执行时间约为 3-4 毫秒。在这些情况下,什么是合适的FPS?给定的常数值是否适合我的机制中缺少什么或错误?提前非常感谢。主线程中的代码块。
private final static int MAX_FPS = 200;
private final static int FRAME_PERIOD = 1000 / MAX_FPS;
private final static int MAX_FRAME_SKIPS = 5;
public void run() {
initTimingElements();
long beginTime;
long timeDiff;
int sleepTime;
int framesSkipped;
long beginTime2;
long diff1;
long diff2;
sleepTime = 0;
Canvas canvas;
Log.d(TAG, "Starting game loop");
while (running) {
canvas = null;
try {
canvas = this.surfaceHolder.lockCanvas();
synchronized (surfaceHolder) {
beginTime = System.currentTimeMillis();
framesSkipped = 0;
this.gamePanel.update();
diff1=System.currentTimeMillis()-beginTime;
beginTime2=System.currentTimeMillis();
this.gamePanel.render(canvas);
diff2=System.currentTimeMillis()-beginTime2;
timeDiff = System.currentTimeMillis() - beginTime;
sleepTime = (int) (FRAME_PERIOD - timeDiff);
if (sleepTime > 0) {
try {
Thread.sleep(sleepTime);
} catch (InterruptedException e) {
}
}
while (sleepTime < 0 && framesSkipped < MAX_FRAME_SKIPS) {
this.gamePanel.update();
sleepTime += FRAME_PERIOD;
framesSkipped++;
}
if (framesSkipped > 0) {
Log.d(TAG, "Skipped:" + framesSkipped);
}
framesSkippedPerStatCycle += framesSkipped;
storeStats();
}
} finally {
if (canvas != null) {
surfaceHolder.unlockCanvasAndPost(canvas);
}
}
}
}