101 lines
2.3 KiB
C++
101 lines
2.3 KiB
C++
//Experiments.h
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//DJD: definitions used in running experiments {
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#ifndef EXPERIMENTS_H
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#define EXPERIMENTS_H
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//windows-dependent timing mechanism
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#include <windows.h>
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//for accurate timing of paths
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class Timer
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{
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protected:
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//time at which the timer was started
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LARGE_INTEGER StartTime;
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// LARGE_INTEGER StopTime;
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//frequency of the counter
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LONGLONG Frequency;
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//calibration component - time between lines
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LONGLONG Correction;
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public:
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//constructor
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Timer()
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{
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//retrieves the frequency of the counter
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LARGE_INTEGER freq;
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QueryPerformanceFrequency(&freq);
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//gets the relevant portion of that data
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Frequency = freq.QuadPart;
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LARGE_INTEGER StopTime;
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//starts the timer
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Start();
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// Stop();
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//and measures the time between these lines
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QueryPerformanceCounter(&StopTime);
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//stores the relevant part of that figure
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Correction = StopTime.QuadPart - StartTime.QuadPart;
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}
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//start timing
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void Start()
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{
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// Sleep(0);
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//record the start time
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QueryPerformanceCounter(&StartTime);
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}
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// void Stop()
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// {
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// QueryPerformanceCounter(&StopTime);
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// }
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//return the time since the start time in milliseconds
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float GetDuration()
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{
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//get the current time from the timer
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LARGE_INTEGER StopTime;
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QueryPerformanceCounter(&StopTime);
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//return the calculated duration since the timer was started
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return (float)(StopTime.QuadPart - StartTime.QuadPart - Correction) * 1000.0f / Frequency;
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}
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};
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//structure for holding data from the experiments
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struct Data
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{
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//the total time the algorithm ran
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float TotalTime;
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//the time taken to construct channels, run funnel algorithms, etc.
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float ConstructionTime;
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//the length of the best path found to this point
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float Length;
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//the number of nodes searched at this point
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int SearchNodes;
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//the number of triangles used in funnel algorithms, etc.
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int ConstructionNodes;
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//the number of paths found so far
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int Paths;
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//constructor
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Data()
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{
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//initializes all variables
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Reset();
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}
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//initializes all variables to default values
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void Reset()
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{
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TotalTime = 0.0f;
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ConstructionTime = 0.0f;
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Length = 0.0f;
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SearchNodes = 0;
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ConstructionNodes = 0;
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Paths = 1;
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}
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};
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#endif
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//definitions used in running experiments }
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