double debut, fin,freq; //for timer : start, end, frequency...
float delta_time; //delta in sec. between start/end
QueryPerformanceCounter((LARGE_INTEGER*)&debut); //capture the timer before drawing
do
{
if(active && !DrawGLScene())
done = true;
QueryPerformanceCounter((LARGE_INTEGER*)&fin); //capture the timer after drawing
delta_time = (fin-debut)/QueryPerformanceFrequency((LARGE_INTEGER*)&freq);
}while(delta_time==0);
fps=1/delta_time;
QueryPerformanceCounter((LARGE_INTEGER*)&debut); //capture le timer avant dessin do { if(active && !DrawGLScene()) done = true; QueryPerformanceCounter((LARGE_INTEGER*)&fin); //capture le timer apres dessin delta_time = (fin-debut)/freq; //changed that line }while(delta_time==0.0f); fps=delta_time;Quote:LARGE_INTEGER
The LARGE_INTEGER structure is used to represent a 64-bit signed integer value.
typedef union _LARGE_INTEGER {
struct {
DWORD LowPart;
LONG HighPart;
};
LONGLONG QuadPart;
} LARGE_INTEGER;
Members
LowPart
Specifies the low-order 32 bits.
HighPart
Specifies the high-order 32 bits.
QuadPart
Specifies a 64-bit signed integer.
Remarks
The LARGE_INTEGER structure is actually a union. If your compiler has built-in support for 64-bit integers, use the QuadPart member to store the 64-bit integer. Otherwise, use the LowPart and HighPart members to store the 64-bit integer.
QueryPerformanceCounter((LARGE_INTEGER*)&debut); //capture le timer avant dessin do { if(active && !DrawGLScene()) done = true; QueryPerformanceCounter((LARGE_INTEGER*)&fin); //capture le timer apres dessin }while((fin-debut)*1.0/freq==0.0);do { if(active && !DrawGLScene()) done = true; QueryPerformanceCounter((LARGE_INTEGER*)&fin); //capture le timer apres dessin delta_time = (fin.QuadPart-debut.QuadPart); }while(delta_time==0);double cTimeManager::GetTime(){ QueryPerformanceCounter(&this->QPCret); return((double)(this->QPCret.QuadPart)/this->QPFret.QuadPart);}
