class Geo::GeoFrameTime

└>Geo::GeoSingleton< GeoFrameTime >

This class measures frame rate and also computes a running average of the last n frames.

It's designed as a singleton.

Variables

Name	Description
tClass * m_Singleton = NULL	Pointer to the singleton instance or NULL if not started.
const float ms_DefaultFramerate	The framerate to return when there has not yet been enough samples.
const Geo::s32 ms_NumAverageFrames = 300	The number of frames to average over.

Functions

Name	Description
~GeoFrameTime()	Destructor.
~GeoSingleton()	Destructor clears singleton pointer.
GeoFrameTime()	Constructor just sets up defaults.
GeoSingleton()	Constructor initialises singleton pointer.
Get()	Returns a pointer to the singleton instance.
GetAbsoluteTime()	Returns number of seconds since the beginning.
GetAverageFramesPerSecond()	Returns average of frame rate over a number of frames.
GetAverageFrameTime()	Returns frame time averaged over a number of frames.
GetConstFramerate()	Get the constant frame rate.
GetFrameNumber()	Returns number of update calls made.
GetFramesPerSecond()	Returns current frame rate.
GetFrameTime()	Returns length of last frame in seconds.
GetMaximumFrameTime()	Returns the maximum frame time over the same averaged period as GetAverageFrameTime()
IsAvailable()	Returns true if the singleton is available.
IsPaused()	Return true if we are paused.
IsRunningConstFramerate()	Find out if we're running with a constant frame rate.
NonCopyable(NonCopyable &&)	Defaulted to allow move.
operator=(NonCopyable &&)	Defaulted to allow move.
Pause(bool)	Pause the timer, handles nested pause calls but they are to be avoided.
SetConstFramerate(bool, float)	Enable/disable constant frame rate mode and set rate.
Start()	Setup the singleton instance.
Stop()	Release the singleton instance.
Update()	Update the frame time - increments frame number and calculates frame time as elapsed time since last call.

Geo::GeoFrameTime::~GeoFrameTime

public: ~GeoFrameTime()

Destructor.

Geo::GeoSingleton< tClass >::~GeoSingleton

protected: ~GeoSingleton()

Destructor clears singleton pointer.

Geo::GeoFrameTime::GeoFrameTime

public: GeoFrameTime()

Constructor just sets up defaults.

Geo::GeoSingleton< tClass >::GeoSingleton

protected: GeoSingleton()

Constructor initialises singleton pointer.

tClass * Geo::GeoSingleton< tClass >::Get

public: tClass * Get()

Returns a pointer to the singleton instance.

double Geo::GeoFrameTime::GetAbsoluteTime

public: double GetAbsoluteTime() const

Returns number of seconds since the beginning.

float Geo::GeoFrameTime::GetAverageFramesPerSecond

public: float GetAverageFramesPerSecond() const

Returns average of frame rate over a number of frames.

float Geo::GeoFrameTime::GetAverageFrameTime

public: float GetAverageFrameTime() const

Returns frame time averaged over a number of frames.

float Geo::GeoFrameTime::GetConstFramerate

public: float GetConstFramerate() const

Get the constant frame rate.

Geo::u32 Geo::GeoFrameTime::GetFrameNumber

public: Geo::u32 GetFrameNumber() const

Returns number of update calls made.

float Geo::GeoFrameTime::GetFramesPerSecond

public: float GetFramesPerSecond() const

Returns current frame rate.

float Geo::GeoFrameTime::GetFrameTime

public: float GetFrameTime() const

Returns length of last frame in seconds.

float Geo::GeoFrameTime::GetMaximumFrameTime

public: float GetMaximumFrameTime() const

Returns the maximum frame time over the same averaged period as GetAverageFrameTime()

bool Geo::GeoSingleton< tClass >::IsAvailable

public: bool IsAvailable()

Returns true if the singleton is available.

bool Geo::GeoFrameTime::IsPaused

public: bool IsPaused() const

Return true if we are paused.

bool Geo::GeoFrameTime::IsRunningConstFramerate

public: bool IsRunningConstFramerate() const

Find out if we're running with a constant frame rate.

Geo::NonCopyable::NonCopyable

public: NonCopyable
(
NonCopyable &&
)

Defaulted to allow move.

NonCopyable& Geo::NonCopyable::operator=

public: NonCopyable & operator=
(
NonCopyable &&
)

Defaulted to allow move.

Geo::s32 Geo::GeoFrameTime::Pause

public: Geo::s32 Pause
(
bool pause
)

Pause the timer, handles nested pause calls but they are to be avoided.

void Geo::GeoFrameTime::SetConstFramerate

public: void SetConstFramerate
(
bool enable,
float rate
)

Enable/disable constant frame rate mode and set rate.

bool Geo::GeoSingleton< tClass >::Start

public: bool Start()

Setup the singleton instance.

void Geo::GeoSingleton< tClass >::Stop

public: void Stop()

Release the singleton instance.

void Geo::GeoFrameTime::Update

public: void Update()

Update the frame time - increments frame number and calculates frame time as elapsed time since last call.

It is assumed that this function is called at the beginning of every frame, so when it is called the first time the frame time is unknown, so it will return FrameNumber == 0, FrameTime == 1/ms_DefaultFramerate, Framerate = ms_DefaultFramerate and AbsoluteTime == 0.

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