DXUT統(tǒng)計函數(shù)
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函數(shù) |
描述 |
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DXUTGetFPS |
獲取當前每秒提交的幀數(shù) |
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DXUTGetFrameStats |
獲取一個指向字符串的指針，該字符串包括每秒幀數(shù)、分辨率、后臺緩沖區(qū)格式、深度緩沖區(qū)格式。 |
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DXUTGetDeviceStats |
獲取一個指向字符串的指針，該字符串包括當前設備類型、頂點運算行為和設備名。 |
DXUTGetFPS
Get the current number of frames being presented per second.
FLOAT DXUTGetFPS() ;
Parameters
None.
Return Values
The current number of frames being presented per second.
DXUTGetFrameStats
Get a pointer to a string containing the current number of frames per second (optionally), resolution, back buffer format, and depth stencil format.
LPCWSTR DXUTGetFrameStats(
bool bIncludeFPS
) ;
Parameters
- bIncludeFPS
- [in] If true, the string returned will contain the frames per second. Otherwise, it will not.
Return Values
Pointer to a string containing the current number of frames per second (optionally), resolution, back buffer format, and depth stencil format.
DXUTGetDeviceStats
Get a pointer to a string containing the current device type, vertex processing behavior, and device name.
LPCWSTR DXUTGetDeviceStats() ;
Parameters
None.
Return Values
Pointer to a string containing the current device type, vertex processing behavior, and device name.
DXUT時間函數(shù)
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函數(shù) |
描述 |
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DXUTGetTime |
獲取當前時間（秒） |
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DXUTGetElapsedTime |
獲取從上一幀到當前幀所經過的時間 |
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DXUTSetConstantFrameTime |
啟用或禁用固定幀時間 |
DXUTGetTime
Get the current time, in seconds.
DOUBLE DXUTGetTime() ;
Parameters
None.
Return Values
The current time, in seconds.
Remarks
DXUT internally uses the best practices for high resolution timing information as described in the "Game Timing and Multicore Processors" article in the DirectX SDK.
DXUTGetElapsedTime
Get the time elapsed since the last frame.
FLOAT DXUTGetElapsedTime() ;
Parameters
None.
Return Values
Time elapsed, in seconds, since the last frame.
Remarks
DXUT internally uses the best practices for high resolution timing information as described in the "Game Timing and Multicore Processors" article in the DirectX SDK.
DXUTSetConstantFrameTime
Enables or disables a constant frame time.
HRESULT DXUTSetConstantFrameTime(
BOOL bEnabled ,
FLOAT fTimePerFrame
) ;
Parameters
- bEnabled
- [in] If TRUE, a constant frame time will be enabled.
- fTimePerFrame
- [in] Time per frame, in seconds. The default value is 0.0333f, so the fTime parameter of LPDXUTCALLBACKFRAMEMOVE and the render callback functions will advance one second for every 30 frames.
Return Values
If the function succeeds, the return value is S_OK. If the function fails, the return value can be one of the error codes in DXUTERR.
Remarks
This function simulates a fixed-frame rate render loop by sending a constant value for elapsed time to the LPDXUTCALLBACKFRAMEMOVE and render callback functions. The default rate is one second for every 30 frames. The application itself will continue to render at an unregulated rate (which may be far higher than the specified frame rate).
This function is useful for saving the rendered output to a video format for playback, allowing animation at a rate independent of the actual rate at which frames were rendered.
DXUT計時器函數(shù)
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函數(shù) |
描述 |
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DXUTSetTimer |
添加一個新的計時器 |
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DXUTKillTimer |
卸載一個已有的計時器 |
DXUTSetTimer
Starts a DXUT timer that will trigger a callback function at regular intervals.
HRESULT DXUTSetTimer(
LPDXUTCALLBACKTIMER pCallbackTimer ,
FLOAT fTimeoutInSecs ,
UINT * pnIDEvent ,
void * pCallbackUserContext
) ;
Parameters
- pCallbackTimer
- [in] Pointer to a timer callback function. The callback function is to be called at the specified fTimeoutInSecs timeout intervals. May not be NULL.
- fTimeoutInSecs
- [in] Interval, in seconds, between successive calls to the timer callback function. The default value is 1.0f.
- pnIDEvent
- [in] Optional pointer to a variable to receive the event ID for the new timer. This event ID will be passed to the timer callback function to indicate which timer generated the event, allowing the application to use a single callback function for multiple timers. The default value is NULL.
- pCallbackUserContext
- [in] Pointer to a user-defined value which is passed to the callback function. Typically used by an application to pass a pointer to a data structure that provides context information for the callback function. The default value is NULL
Return Values
If the function succeeds, the return value is S_OK. If the function fails, the return value can be one of the error codes in DXUTERR.
Remarks
Timers created with DXUTSetTimer can be destroyed with DXUTKillTimer.
LPDXUTCALLBACKTIMER
A timer to be called at specified time intervals by DXUT.
VOID LPDXUTCALLBACKTIMER(
UINT idEvent ,
void* pUserContext
) ;
Parameters
- idEvent
- [in] Specifies a nonzero timer event ID. Indicates which timer generated the event, allowing the application to use a single callback function for multiple timers.
- pUserContext
- [in] Pointer to a user-defined value which is passed to the callback function. Typically used by an application to pass a pointer to a data structure that provides context information for the callback function. The default value is NULL
Return Values
No return value.
Remarks
DXUT will call this function at the start of the frame, before calling LPDXUTCALLBACKFRAMEMOVE or LPDXUTCALLBACKD3D10FRAMERENDER.
DXUTKillTimer
Uninstalls an existing timer.
HRESULT DXUTKillTimer(
UINT nIDEvent
) ;
Parameters
- nIDEvent
- [in] The event ID for the timer being destroyed. This ID is provided to the application by the DXUTSetTimer method.
Return Values
If the function succeeds, the return value is S_OK. If the function fails, the return value can be one of the error codes in DXUTERR.
Remarks
Timers created with DXUTSetTimer can be destroyed with DXUTKillTimer .