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// FrameRate.h
//
/////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2002 David Ward
//
/////////////////////////////////////////////////////////////////////////////
#ifndef __FrameRate_h__
#define __FrameRate_h__
#include <cmath>
#include "../Common/Common.h"
#include "SettingsStore.h"
#include "DasherModel.h"
namespace Dasher {
/// \ingroup Model
/// \{
/// keeps the framerate (LP_FRAMERATE / 100.0) up-to-date,
/// computes the Steps parameter,
/// computes RXmax - which controls the maximum rate of zooming in
class CFrameRate : public CSettingsUserObserver {
public:
CFrameRate(CSettingsUser *pCreator);
//Responds to a change to LP_FRAMERATE or LP_MAX_BITRATE
// by recomputing the Steps() parameter.
virtual void HandleEvent(int iParameter);
///The number of frames, in which we will attempt to bring
/// the target location (under the cursor, or in dynamic button
/// modes) to the crosshair. See DJW thesis.
int Steps() const {
return m_iSteps;
};
///
/// Reset the framerate class
/// TODO: Need to check semantics here
/// Called from CDasherInterfaceBase::UnPause;
///
void Reset_framerate(unsigned long Time) {
m_iFrames = 0;
m_iTime = Time;
}
void RecordFrame(unsigned long Time);
private:
///number of frames that have been sampled
int m_iFrames;
///time at which first sampled frame was rendered
unsigned long m_iTime;
///number of frames over which we will compute average framerate
int m_iSamples;
int m_iSteps;
double m_dBitsAtLimX;
};
/// \}
}
#endif /* #ifndef __FrameRate_h__ */
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