hge source explor 0x8 timer

Posted 2020-07-12 YORU

Timer

　　时间部分，在hge中提供对于fps的控制，时间的控制等。

　　其中会用到的参数有。

hge_impl.h

// Timer float fTime; float fDeltaTime; DWORD nFixedDelta; int nFPS; DWORD t0, t0fps, dt; int cfps;

　　在system.cpp中使用到，用来控制帧率

if(dt >= nFixedDelta) { // fDeltaTime = time step in seconds returned by Timer_GetDelta fDeltaTime=dt/1000.0f; // Cap too large time steps usually caused by lost focus to avoid jerks if(fDeltaTime > 0.2f) { fDeltaTime = nFixedDelta ? nFixedDelta/1000.0f : 0.01f; } // Update time counter returned Timer_GetTime fTime += fDeltaTime; // Store current time for the next frame // and count FPS t0=timeGetTime(); if(t0-t0fps <= 1000) cfps++; else { nFPS=cfps; cfps=0; t0fps=t0; _UpdatePowerStatus(); } // Do user\'s stuff if(procFrameFunc()) break; if(procRenderFunc) procRenderFunc(); // If if "child mode" - return after processing single frame if(hwndParent) break; // Clean up input events that were generated by // WindowProc and weren\'t handled by user\'s code _ClearQueue(); // If we use VSYNC - we could afford a little // sleep to lower CPU usage // if(!bWindowed && nHGEFPS==HGEFPS_VSYNC) Sleep(1); } fps

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Timer_GetTime()

　　返回一个游戏已经运行的时间。

float CALL GEImpl::Timer_GetTime() { return fTime; }

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Timer_GetDelta()

　　返回时间间隔。

float CALL GEImpl::Timer_GetDelta() { return fDeltaTime; }

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Timer_GetFPS()

　　返回fps。

int CALL GEImpl::Timer_GetFPS() { return nFPS; }

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