我在OpenGL上下文窗口中运行了一些动画,所以我需要不断地重绘它.所以我想出了以下代码：
void InitializeRedrawTimer()
{
var timer = new Timer();
timer.Interval = 1000 / 60;
timer.Tick += new EventHandler(timer_Tick);
timer.Start();
}
void timer_Tick(object sender,EventArgs e)
{
glWin.Draw();
}
这只能给我40 FPS.如果我将间隔设置为1毫秒,我可以达到60.那么其他20毫秒去哪了？那只是由于计时器的准确性差或者是什么？如果我想让我的程序尽可能快地运行怎么办？有没有办法连续调用draw func？
解决方法
你可以尝试实现一个游戏循环.
http://blogs.msdn.com/tmiller/archive/2005/05/05/415008.aspx
The basic loop (slightly modified from his original version and the version in the new SDK for ease of reading):
public void MainLoop()
{
// Hook the application’s idle event
System.Windows.Forms.Application.Idle += new EventHandler(OnApplicationIdle);
System.Windows.Forms.Application.Run(myForm);
}
private void OnApplicationIdle(object sender,EventArgs e)
{
while (AppStillIdle)
{
// Render a frame during idle time (no messages are waiting)
UpdateEnvironment();
Render3DEnvironment();
}
}
private bool AppStillIdle
{
get
{
NativeMethods.Message msg;
return !NativeMethods.PeekMessage(out msg,IntPtr.Zero,0);
}
}
//And the declarations for those two native methods members:
[StructLayout(LayoutKind.Sequential)]
public struct Message
{
public IntPtr hWnd;
public WindowMessage msg;
public IntPtr wParam;
public IntPtr lParam;
public uint time;
public System.Drawing.Point p;
}
[System.Security.SuppressUnmanagedCodeSecurity] // We won’t use this malicIoUsly
[DllImport(“User32.dll”,CharSet=CharSet.Auto)]
public static extern bool PeekMessage(out Message msg,IntPtr hWnd,uint messageFilterMin,uint messageFilterMax,uint flags);
Simple,elegant,effective. No extra allocations,no extra collections,it just works.. The Idle event fires when there’s no messages in the queue,and then the handler keeps looping continuously until a message does appear,in which case it stops.. Once all the messages are handled,the idle event is fired again,and the process starts over.
此链接描述使用应用程序的空闲事件的链接.它可能是有用的.您可以简单地执行一点时间测试或睡眠以将其减慢到所需的fps.尝试使用System.Diagnostics.StopWatch类获得最准确的计时器.
希望这会有帮助.
