Package playn.core

Class Game

java.lang.Object

playn.core.Game

public abstract class Game
extends Object

Defines a simple game API. It's not necessary to use this abstraction for your PlayN games, but it takes care of some standard stuff that most games are likely to want.

This implementation separates game processing into two phases: simulation and render. The simulation phase takes place via update and is called with a monotonoically increasing timer at a fixed rate. The interpolation phase takes place via paint and is called every time the game is rendered to the display (which may be more frequently than the simulation is updated). The render phase will generally interpolate the values computed in update to provide smooth rendering based on lower-frequency simulation updates.

See Also:

• Understanding the Game Loop

Field Summary

Fields

Modifier and Type	Field	Description
final Signal<Clock>	paint	A signal emitted on every frame.
final Platform	plat	The platform on which this game is running.
final Signal<Clock>	update	A signal emitted on every simulation update.

Constructor Summary

Constructors

Constructor	Description
Game(Platform plat, int updateRate)	Creates a clocked game with the desired simulation update rate, in ms.

Method Summary

Modifier and Type	Method	Description
void	paint(Clock clock)	Called on every frame.
void	update(Clock clock)	Called on every simulation update.

Methods inherited from class java.lang.Object

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

Field Details

plat

public final Platform plat

The platform on which this game is running.

update

public final Signal<Clock> update

A signal emitted on every simulation update.

paint

public final Signal<Clock> paint

A signal emitted on every frame.

Constructor Details

Game

public Game(Platform plat,
 int updateRate)

Creates a clocked game with the desired simulation update rate, in ms.

Method Details

update

public void update(Clock clock)

Called on every simulation update. The default implementation emits the clock to the updateClock signal, but you can override this method to change or augment this behavior.

Parameters:

clock - a clock configured with the update timing information.

paint

public void paint(Clock clock)

Called on every frame. The default implementation emits the clock to the paintClock signal, but you can override this method to change or augment this behavior.

Parameters:

clock - a clock configured with the frame timing information.