Nebula2探秘04-Time Server研究

原创于 2008-06-10 12:27:00 发布 · 459 阅读

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Nebula2探秘04-Time Server研究

happykevins文

/****************************************************************************/
/*    Nebula2 - Tutorial 04                                                    */
/*  使用TimeServer                                                            */
/*  author: happykevins                                                        */
/****************************************************************************/

///----------------------------------------------------------------------------
/// +必要头文件
#include "kernel/nkernelserver.h"
#include "kernel/ntimeserver.h"
/// -必要头文件
///----------------------------------------------------------------------------

///----------------------------------------------------------------------------
/// +链接库
#pragma comment(lib, "wsock32.lib")
#pragma comment(lib, "d_nkernel.lib")
/// -链接库
///----------------------------------------------------------------------------

///----------------------------------------------------------------------------
/// +Application
int main(int argc, const char** argv)
{
    /// 创建KernelServer
    nKernelServer* ks = n_new(nKernelServer);

    /// 获得TimeServer
    nTimeServer* time = (nTimeServer*)ks->Lookup("/sys/servers/time");
    double totaltime = 0;
    double frametime = 0;

    ///----------------------------------------------------------------------------
    /// +默认情况
    ks->Print("*****Start Timer!***** ");
    time->ResetTime();
    time->StartTime();
    while ( totaltime < 0.5f )
    {
        time->Trigger();
        frametime = time->GetTime() - totaltime;
        totaltime += frametime;
        ks->Print("[FRAME:%f] ", frametime);
    }
    time->StopTime();
    ks->Print("[TOTAL:%f] ", totaltime);
    ks->Print("*****Stop Timer!***** ");
    /// +默认情况
    ///----------------------------------------------------------------------------

    ///----------------------------------------------------------------------------
    /// +设置WaitDelta
    /// @note:
    ///        在WaitDeltaT<0.001时几乎没有什么作用
    ///        在WaitDeltaT>=0.001时每一帧的间隔时间会远远大于0.001
    time->WaitDeltaT(0.001f);
    ks->Print("[WAIT:%fsec] ", time->GetWaitDeltaT());
    ks->Print("*****Start Timer(WaitDeltaT)!***** ");
    time->StartTime();
    while ( totaltime < 2.0f )
    {
        time->Trigger();
        frametime = time->GetTime() - totaltime;
        totaltime += frametime;
        ks->Print("[FRAME:%f] ", frametime);
    }
    time->StopTime();
    ks->Print("[TOTAL:%f] ", totaltime);
    ks->Print("*****Stop Timer(WaitDeltaT)!***** ");
    /// -设置WaitDelta
    ///----------------------------------------------------------------------------

    ///----------------------------------------------------------------------------
    /// +设置LockDelta
    ///    @note:
    ///        LockDeltaT的用途是锁定帧速率
    ///        在LockDeltaT>0时，每一帧将不会按照真实时间来更新
    time->LockDeltaT(0.1);
    ks->Print("[LOCK:%fsec] ", time->GetLockDeltaT());
    ks->Print("*****Start Timer(LockDeltaT)!***** ");
    time->StartTime();
    while ( totaltime < 4.0f )
    {
        time->Trigger();
        frametime = time->GetTime() - totaltime;
        totaltime += frametime;
        ks->Print("[FRAME:%f] ", frametime);
    }
    time->StopTime();
    ks->Print("[TOTAL:%f] ", totaltime);
    ks->Print("*****Stop Timer(LockDeltaT)!***** ");
    /// +设置LockDelta
    ///----------------------------------------------------------------------------

    /// 销毁KernelServer
    n_delete(ks);

    getchar();
    return 0;
}
/// -Application
///----------------------------------------------------------------------------