javax.media.opengl
Interface FPSCounter

All Known Subinterfaces:

GLAnimatorControl

public interface FPSCounter

FPSCounter feature.
An implementation initially has the FPSCounter feature disabled.
Use setUpdateFPSFrames(int, PrintStream) to enable and disable the FPSCounter feature.

Field Summary

static int

DEFAULT_FRAMES_PER_INTERVAL

Method Summary

long	getFPSStartTime() Returns the time of the first display call in milliseconds after enabling this feature via setUpdateFPSFrames(int, PrintStream). This value is reset via resetFPSCounter().
float	getLastFPS()
long	getLastFPSPeriod()
long	getLastFPSUpdateTime() Returns the time of the last update interval in milliseconds, if this feature is enabled via setUpdateFPSFrames(int, PrintStream). This value is reset via resetFPSCounter().
float	getTotalFPS()
long	getTotalFPSDuration()
int	getTotalFPSFrames()
int	getUpdateFPSFrames()
void	resetFPSCounter() Reset all performance counter (startTime, currentTime, frame number)
void	setUpdateFPSFrames(int frames, PrintStream out)

Field Detail

DEFAULT_FRAMES_PER_INTERVAL

static final int DEFAULT_FRAMES_PER_INTERVAL

See Also:

Constant Field Values

Method Detail

setUpdateFPSFrames

void setUpdateFPSFrames(int frames,
                        PrintStream out)

Parameters:

frames - Update interval in frames.
At every rendered frames interval the currentTime and fps values are updated. If the frames interval is <= 0, no update will be issued, ie the FPSCounter feature is turned off. You may choose DEFAULT_FRAMES_PER_INTERVAL.

out - optional print stream where the fps values gets printed if not null at every frames interval

resetFPSCounter

void resetFPSCounter()

Reset all performance counter (startTime, currentTime, frame number)

getUpdateFPSFrames

int getUpdateFPSFrames()

Returns:

update interval in frames

See Also:

setUpdateFPSFrames(int, PrintStream)

getFPSStartTime

long getFPSStartTime()

Returns the time of the first display call in milliseconds after enabling this feature via setUpdateFPSFrames(int, PrintStream).
This value is reset via resetFPSCounter().

See Also:

setUpdateFPSFrames(int, PrintStream), resetFPSCounter()

getLastFPSUpdateTime

long getLastFPSUpdateTime()

Returns the time of the last update interval in milliseconds, if this feature is enabled via setUpdateFPSFrames(int, PrintStream).
This value is reset via resetFPSCounter().

See Also:

setUpdateFPSFrames(int, PrintStream), resetFPSCounter()

getLastFPSPeriod

long getLastFPSPeriod()

Returns:

Duration of the last update interval in milliseconds.

See Also:

setUpdateFPSFrames(int, PrintStream), resetFPSCounter()

getLastFPS

float getLastFPS()

Returns:

Last update interval's frames per seconds, getUpdateFPSFrames() / getLastFPSPeriod()

See Also:

setUpdateFPSFrames(int, PrintStream), resetFPSCounter()

getTotalFPSFrames

int getTotalFPSFrames()

Returns:

Number of frame rendered since getFPSStartTime() up to getLastFPSUpdateTime()

See Also:

setUpdateFPSFrames(int, PrintStream), resetFPSCounter()

getTotalFPSDuration

long getTotalFPSDuration()

Returns:

Total duration in milliseconds, getLastFPSUpdateTime() - getFPSStartTime()

See Also:

setUpdateFPSFrames(int, PrintStream), resetFPSCounter()

getTotalFPS

float getTotalFPS()

Returns:

Total frames per seconds, getTotalFPSFrames() / getTotalFPSDuration()

See Also:

setUpdateFPSFrames(int, PrintStream), resetFPSCounter()