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GameStateTransitionImpl.java
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GameStateTransitionImpl.java
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package com.gemserk.commons.gdx;
import java.util.ArrayList;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL10;
import com.gemserk.animation4j.transitions.TimeTransition;
import com.gemserk.commons.gdx.graphics.ImmediateModeRendererUtils;
/**
* Implements a transition between game states given a list of effects to be used.
*
* @author acoppes
*
*/
public class GameStateTransitionImpl extends GameStateImpl {
public static class TransitionEffect {
private TimeTransition timeTransition;
protected float getAlpha() {
return timeTransition.get();
}
public TransitionEffect(float duration) {
timeTransition = new TimeTransition();
timeTransition.start(duration);
}
public void update(float delta) {
timeTransition.update(delta);
}
/**
* @param current
* The current game state.
* @param next
* The next game state.
*/
public void render(GameState current, GameState next) {
}
public boolean isFinished() {
return timeTransition.isFinished();
}
}
public static class FadeOutTransitionEffect extends TransitionEffect {
Color color = new Color();
public FadeOutTransitionEffect(float duration) {
super(duration);
}
@Override
public void render(GameState current, GameState next) {
current.render();
color.set(0f, 0f, 0f, getAlpha());
Gdx.gl10.glEnable(GL10.GL_BLEND);
ImmediateModeRendererUtils.getProjectionMatrix().setToOrtho2D(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
ImmediateModeRendererUtils.fillRectangle(0f, 0f, Gdx.graphics.getWidth(), Gdx.graphics.getHeight(), color);
Gdx.gl10.glDisable(GL10.GL_BLEND);
}
}
public static class FadeInTransitionEffect extends TransitionEffect {
Color color = new Color();
public FadeInTransitionEffect(float duration) {
super(duration);
}
@Override
public void render(GameState current, GameState next) {
next.render();
color.set(0f, 0f, 0f, 1f - getAlpha());
Gdx.gl10.glEnable(GL10.GL_BLEND);
ImmediateModeRendererUtils.getProjectionMatrix().setToOrtho2D(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
ImmediateModeRendererUtils.fillRectangle(0f, 0f, Gdx.graphics.getWidth(), Gdx.graphics.getHeight(), color);
Gdx.gl10.glDisable(GL10.GL_BLEND);
}
}
GameState current;
GameState next;
int currentTransitionEffect;
ArrayList<TransitionEffect> transitionEffects;
public GameStateTransitionImpl(GameState current, GameState next, ArrayList<TransitionEffect> transitionEffects) {
this.current = current;
this.next = next;
this.transitionEffects = transitionEffects;
this.currentTransitionEffect = 0;
}
@Override
public void init() {
}
@Override
public void update() {
if (currentTransitionEffect >= transitionEffects.size()) {
onTransitionFinished();
return;
}
transitionEffects.get(currentTransitionEffect).update(getDelta());
if (transitionEffects.get(currentTransitionEffect).isFinished())
currentTransitionEffect++;
}
protected void onTransitionFinished() {
}
@Override
public void render() {
if (currentTransitionEffect >= transitionEffects.size())
return;
transitionEffects.get(currentTransitionEffect).render(current, next);
}
@Override
public void dispose() {
}
}