c# – .NET重绘速度为60 FPS？

发布时间：2020-12-15 04:17:02 所属栏目：百科来源：网络整理

导读：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_

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.

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!