com.jme.app
Class VariableTimestepGame

java.lang.Object
  com.jme.app.AbstractGame
      com.jme.app.VariableTimestepGame

Direct Known Subclasses:

RenParticleEditor, TestFadeInOutTransientEffect

public abstract class VariableTimestepGame

extends AbstractGame

VariableTimestepGame implements a very simple loop, updating game logic and rendering as fast as hardware permits. To compensate for the variable framerate, every frame the update method is passed the amount of elapsed time, in seconds, since the previous update. The game should execute the logic based on the time elapsed.

Version:

$Id: VariableTimestepGame.java,v 1.10 2004/10/14 01:23:11 mojomonkey Exp $

Author:

Eric Woroshow

Field Summary

Fields inherited from class com.jme.app.AbstractGame

ALWAYS_SHOW_PROPS_DIALOG, display, finished, FIRSTRUN_OR_NOCONFIGFILE_SHOW_PROPS_DIALOG, NEVER_SHOW_PROPS_DIALOG, properties

Constructor Summary

VariableTimestepGame()

Method Summary

protected abstract void	cleanup() cleanup cleans up any created objects before exiting the application.
float	getFramesPerSecond() getFramesPerSecond gets the current frame rate.
protected abstract void	initGame() initGame creates and initializes all game data required for startup.
protected abstract void	initSystem() initSystem creates all the necessary system components for the client application.
protected void	quit() Quits the program abruptly using System.exit.
protected abstract void	reinit() reinit rebuilds the subsystems.
protected abstract void	render(float interpolation) render displays the game information to the OpenGL context.
void	start() Renders and updates logic as fast as possible, but keeps track of time elapsed between frames.
protected abstract void	update(float deltaTime) update updates the game state.

Methods inherited from class com.jme.app.AbstractGame

assertDisplayCreated, finish, getAttributes, getVersion, setDialogBehaviour, setDialogBehaviour, setDialogBehaviour

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VariableTimestepGame

public VariableTimestepGame()

Method Detail

getFramesPerSecond

public float getFramesPerSecond()

getFramesPerSecond gets the current frame rate.

Returns:

the current number of frames rendering per second

start

public final void start()

Renders and updates logic as fast as possible, but keeps track of time elapsed between frames.

Specified by:

start in class AbstractGame

quit

protected void quit()

Quits the program abruptly using System.exit.

Specified by:

quit in class AbstractGame

See Also:

AbstractGame.quit()

update

protected abstract void update(float deltaTime)

Description copied from class: AbstractGame

update updates the game state. Physics, AI, networking, score checking and like should be completed in this method. How often and when this method is called depends on the main loop implementation.

Specified by:

update in class AbstractGame

Parameters:

deltaTime - the time elapsed since the last frame, in seconds

See Also:

AbstractGame.update(float interpolation)

render

protected abstract void render(float interpolation)

Description copied from class: AbstractGame

render displays the game information to the OpenGL context. Nothing altering the game state should be run during a render. How often and when this method is called depends on the main loop implementation.

Specified by:

render in class AbstractGame

Parameters:

interpolation - unused in this implementation

See Also:

AbstractGame.render(float interpolation)

initSystem

protected abstract void initSystem()

Description copied from class: AbstractGame

initSystem creates all the necessary system components for the client application. It is is called once after start is called. The display must be initialized within this method.

Specified by:

initSystem in class AbstractGame

See Also:

AbstractGame.initSystem()

initGame

protected abstract void initGame()

Description copied from class: AbstractGame

initGame creates and initializes all game data required for startup. It is suggested that caching of frequently used resources is done within this method. It is called once after initSystem has completed.

Specified by:

initGame in class AbstractGame

See Also:

AbstractGame.initGame()

reinit

protected abstract void reinit()

Description copied from class: AbstractGame

reinit rebuilds the subsystems. It may be called at any time by the client application.

Specified by:

reinit in class AbstractGame

See Also:

AbstractGame.reinit()

cleanup

protected abstract void cleanup()

Description copied from class: AbstractGame

cleanup cleans up any created objects before exiting the application. It is called once after finish is called.

Specified by:

cleanup in class AbstractGame

See Also:

AbstractGame.cleanup()