libgdx自制简易Flappy Bird
Flappy Bird，好吧，无需多说。今天年初不知咋的，一下子就火了，而且直接跃居榜首，在ios和android平台都是如此，实在难以理解。传说其作者每天收入能达到5w刀，着实碉堡了。。。
好吧，咱没创意，不过山寨一个还是可以的，话说！！！
好了，不罗嗦了，直接代码了。
我使用libgdx框架（你要说是引擎也行）实现的，版本为0.9.9。就设计了一个开始画面和一个游戏画面。
游戏入口和主类：
package com.fxb.flappy;
import com.badlogic.gdx.Game;
public class FlappyBird extends Game{
//static Skin skin;
StartScreen startScreen;
GameScreen gameScreen;
LevelScreen levelScreen;
@Override
public void create() {
// TODO Auto-generated method stub
Assets.init();
startScreen = new StartScreen(this);
gameScreen = new GameScreen(this);
levelScreen = new LevelScreen(this);
setScreen( startScreen );
}
@Override
public void render() {
// TODO Auto-generated method stub
super.render();
}
@Override
public void dispose() {
// TODO Auto-generated method stub
//skin.dispose();
Assets.clean();
super.dispose();
}
}
开始画面：
package com.fxb.flappy; import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.ScreenAdapter;
import com.badlogic.gdx.graphics.GL10;
import com.badlogic.gdx.scenes.scene2d.InputEvent;
import com.badlogic.gdx.scenes.scene2d.InputListener;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.TextButton; public class StartScreen extends ScreenAdapter{ FlappyBird game;
Stage stage;
TextButton btnStart, btnMode; public StartScreen(FlappyBird game0){
game = game0;
stage = new Stage(); btnStart = new TextButton( "Start Game", Assets.skin, "default" );
btnStart.setSize( 150, 70 );
Constant.CenterInStage( btnStart, stage );
stage.addActor( btnStart ); btnStart.addListener(new InputListener(){
@Override
public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) {
// TODO Auto-generated method stub
return true;
}
@Override
public void touchUp(InputEvent event, float x, float y, int pointer, int button) {
// TODO Auto-generated method stub
game.setScreen( game.gameScreen );
Constant.state = Constant.GameState.game_on;
}
}); } @Override
public void show() {
// TODO Auto-generated method stub
Gdx.input.setInputProcessor( stage );
} @Override
public void render(float delta) {
// TODO Auto-generated method stub
Gdx.gl.glClearColor( 0, 1, 1, 1 );
Gdx.gl.glClear( GL10.GL_COLOR_BUFFER_BIT ); stage.act();
stage.draw();
} @Override
public void dispose() {
// TODO Auto-generated method stub
stage.dispose();
super.dispose();
} }
游戏场景：
package com.fxb.flappy; import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.ScreenAdapter;
import com.badlogic.gdx.graphics.GL10; public class GameScreen extends ScreenAdapter{ FlappyBird game;
GameStage gameStage;
OverStage overStage; public GameScreen(FlappyBird game0){
game = game0;
gameStage = new GameStage(this);
overStage = new OverStage(this);
} @Override
public void show() {
// TODO Auto-generated method stub
Gdx.input.setInputProcessor( gameStage );
} @Override
public void render(float delta) {
// TODO Auto-generated method stub
Gdx.gl.glClearColor( 0, 1, 1, 1 );
Gdx.gl.glClear( GL10.GL_COLOR_BUFFER_BIT ); if( Constant.state == Constant.GameState.game_on ){
gameStage.act();
gameStage.draw();
Gdx.input.setInputProcessor( gameStage );
}
else if( Constant.state == Constant.GameState.game_preover ){
gameStage.draw();
overStage.act();
overStage.draw();
Gdx.input.setInputProcessor( overStage );
} } @Override
public void dispose() {
// TODO Auto-generated method stub
super.dispose();
} }
游戏舞台：
package com.fxb.flappy; import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.scenes.scene2d.Group;
import com.badlogic.gdx.scenes.scene2d.InputEvent;
import com.badlogic.gdx.scenes.scene2d.InputListener;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.Image;
import com.badlogic.gdx.utils.Pool;
import com.badlogic.gdx.utils.Pools; public class GameStage extends Stage{ GameScreen gameScreen;
Group groupUp, groupDown;
Pool<PipeUp> poolUp;
Pool<PipeDown> poolDown;
Bird bird;
Image imgBack;
OrthographicCamera camera; int xIndex;
float leftX = 0;
float speed;
float currentTime;
float lastTouchTime; public GameStage( GameScreen gameScreen0 ){
gameScreen = gameScreen0; groupUp = new Group();
groupDown = new Group(); poolUp = Pools.get( PipeUp.class );
poolDown = Pools.get( PipeDown.class ); bird = new Bird();
imgBack = Constant.CreateImage( Assets.regionBack );
camera = new OrthographicCamera( Assets.regionBack.getRegionWidth(), Assets.regionBack.getRegionHeight() );
camera.position.set( Assets.regionBack.getRegionWidth()/2, Assets.regionBack.getRegionHeight()/2, 0 ); //addActor( imgBack );
addActor( bird );
addActor( groupUp );
addActor( groupDown ); this.addListener(new InputListener(){
@Override
public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) {
// TODO Auto-generated method stub
if( currentTime - lastTouchTime > 0.15f ){
if( bird.speedY < 0 ){
bird.speedY += 15;
}
else if( bird.speedY < 5 ){
bird.speedY += 15;
}
else if( bird.speedY < 8 ){
bird.speedY += 8;
}
else{
bird.speedY += 4;
} if( bird.speedY > 25 ){
bird.speedY = 25;
}
lastTouchTime = currentTime;
}
return true;
}
}); Clear();
} public void Clear(){
xIndex = 3;
//this.camera.translate( -leftX, 0 );
//this.camera.position.set( getWidth()/2, getHeight()/2, 0 );
this.getCamera().translate( -leftX, 0, 0 );
leftX = 0; speed = 2f;
currentTime = 0;
lastTouchTime = -1f; bird.Clear(); groupUp.clear();
groupDown.clear();
poolUp.clear();
poolDown.clear(); for( int i=0; i<xIndex; ++i ){
AddPipe(i);
} Gdx.input.setInputProcessor(this);
} public void AddPipe( int xIndex0 ){
PipeUp pipeup = poolUp.obtain();
PipeDown pipedown = poolDown.obtain(); groupUp.addActor( pipeup );
groupDown.addActor( pipedown ); float rate1 = MathUtils.random( 0.2f, 1.3f );
float rate2 = 1.5f - rate1; //rate1 = 0.8f;
//rate2 = 0.2f; int height1 = (int)( Assets.regionPipeUp.getRegionHeight()*rate1 );
int height2 = (int)( Assets.regionPipeDown.getRegionHeight()*rate2 ); if( rate1 < 1 ){
pipeup.region = new TextureRegion( Assets.regionPipeUp, 0, Assets.regionPipeUp.getRegionHeight()-height1, Assets.regionPipeUp.getRegionWidth(), height1 );
pipeup.setHeight( height1 );
}
else{
pipeup.region = Assets.regionPipeUp;
pipeup.setHeight( height1 );
} if( rate2 < 1 ){
pipedown.region = new TextureRegion( Assets.regionPipeDown, 0, 0, Assets.regionPipeDown.getRegionWidth(), height2 );
pipedown.setHeight( height2 );
}
else{
pipedown.region = Assets.regionPipeDown;
pipedown.setHeight( height2 );
} //pipedown
pipeup.setPosition( getWidth()+xIndex0*300, getHeight()-pipeup.getHeight() );
pipedown.setPosition( getWidth()+xIndex0*300, 0 );
} @Override
public void act() {
// TODO Auto-generated method stub leftX += speed;
this.getCamera().translate( speed, 0, 0 );
bird.translate( speed, bird.speedY ); currentTime += Gdx.graphics.getDeltaTime(); boolean isDis = false;
for( int i=0; i<groupUp.getChildren().size; ++i ){
PipeUp pipeup = (PipeUp)groupUp.getChildren().items[i];
if( pipeup.getRight() < leftX ){
groupUp.removeActor( pipeup );
poolUp.free( pipeup );
if( !isDis ){
isDis = true;
}
} if( Constant.IsCollsion( pipeup, bird ) ){
//Gdx.app.exit();
Constant.state = Constant.GameState.game_preover;
}
} for( int i=0; i<groupDown.getChildren().size; ++i ){
PipeDown pipedown = (PipeDown)groupDown.getChildren().items[i];
if( pipedown.getRight() < leftX ){
groupDown.removeActor( pipedown );
poolDown.free( pipedown );
if( !isDis ){
isDis = true;
}
} if( Constant.IsCollsion( pipedown, bird ) ){
//Gdx.app.exit();
Constant.state = Constant.GameState.game_preover;
}
} if( isDis ){
AddPipe( xIndex );
xIndex++;
} if( bird.getY() < 0 ){
Constant.state = Constant.GameState.game_preover;
} super.act();
} @Override
public void draw() {
// TODO Auto-generated method stub
camera.update(); SpriteBatch batch = this.getSpriteBatch();
batch.setProjectionMatrix(camera.combined);
batch.begin();
batch.draw( Assets.regionBack, 0, 0 );
batch.end(); super.draw();
} @Override
public void dispose() {
// TODO Auto-generated method stub
super.dispose();
} }
游戏结束舞台：
package com.fxb.flappy; import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.scenes.scene2d.InputEvent;
import com.badlogic.gdx.scenes.scene2d.InputListener;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.Label;
import com.badlogic.gdx.scenes.scene2d.ui.TextButton;
import com.badlogic.gdx.scenes.scene2d.ui.Window; public class OverStage extends Stage{ Window window;
TextButton button1;
TextButton button2;
Label label;
GameScreen gameScreen; public OverStage(GameScreen gameScreen0){
gameScreen = gameScreen0; window = new Window( "", Assets.skin );
//window.add( "GAME OVER\n" ); label = new Label( "GAME OVER", Assets.skin );
//label.setFontScale( 1.0f ); button1 = new TextButton( "Again", Assets.skin );
button2 = new TextButton( "Exit", Assets.skin ); button1.addListener( new InputListener(){
@Override
public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) {
// TODO Auto-generated method stub
return true;
} @Override
public void touchUp(InputEvent event, float x, float y, int pointer, int button) {
// TODO Auto-generated method stub
Constant.state = Constant.GameState.game_on;
gameScreen.gameStage.Clear();
}
}); button2.addListener( new InputListener(){
@Override
public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) {
// TODO Auto-generated method stub
return true;
} @Override
public void touchUp(InputEvent event, float x, float y, int pointer, int button) {
// TODO Auto-generated method stub
//Constant.state = Constant.GameState.game_on;
Gdx.app.exit();
}
}); window.setSize( getWidth()/2, getHeight()/6 );
window.addActor( button1 );
window.addActor( button2 );
window.addActor( label ); button1.setSize( 60, 30 );
button2.setSize( 60, 30 );
label.setSize( 100, 50 );
button1.setPosition( window.getWidth()/8, 10 );
button2.setPosition( window.getWidth()*7/8-button2.getWidth(), 10 );
label.setPosition( window.getWidth()/2-label.getWidth()/2, button2.getTop()+20 ); this.addActor( window );
Constant.CenterInStage( window, this );
} }
游戏主角类，即那只鸟
package com.fxb.flappy; import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.g2d.Animation;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.scenes.scene2d.Actor; public class Bird extends Actor{ Animation animation;
float currentTime;
float speedY; public Bird(){
animation = new Animation( 0.15f, Assets.sRegionBird );
setSize( Assets.sRegionBird[0].getRegionWidth(), Assets.sRegionBird[0].getRegionHeight() );
setOrigin( getWidth()/2, getHeight()/2 );
//setPosition( );
Clear();
} public void Clear(){
currentTime = 0;
setPosition( 100, Gdx.graphics.getHeight()/2-getHeight()/2 );
speedY = Constant.speedY;
} @Override
public void act(float delta) {
// TODO Auto-generated method stub
currentTime += delta; //this.translate( 0, speedY );
//speedY -= 0.5f; if( speedY > -10f ){
speedY += Constant.speedInc;
} super.act(delta);
} @Override
public void draw(SpriteBatch batch, float parentAlpha) {
// TODO Auto-generated method stub TextureRegion keyFrame = animation.getKeyFrame( currentTime, true ); batch.draw( keyFrame, getX(), getY(), getOriginX(), getOriginY(), getWidth(), getHeight(), getScaleX(), getScaleY(), getRotation() ); super.draw(batch, parentAlpha);
} }
上面管道类
package com.fxb.flappy; import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.scenes.scene2d.Actor; public class PipeUp extends Actor{ TextureRegion region; public PipeUp(){
region = new TextureRegion( Assets.regionPipeUp );
setSize( region.getRegionWidth(), region.getRegionHeight() );
} /*
public UpdateRegion(){
region = new TextureRegion( Assets.regionPipeUp );
}
*/
@Override
public void act(float delta) {
// TODO Auto-generated method stub
super.act(delta);
} @Override
public void draw(SpriteBatch batch, float parentAlpha) {
// TODO Auto-generated method stub //batch.draw( region, region.getRegionX(), region.getRegionY(), region.getRegionWidth(), region.getRegionHeight() );
batch.draw( region, getX(), getY(), getWidth(), getHeight() ); super.draw(batch, parentAlpha);
}
}
下面管道类：
package com.fxb.flappy; import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.scenes.scene2d.Actor; public class PipeDown extends Actor{ TextureRegion region; public PipeDown(){
region = new TextureRegion( Assets.regionPipeDown );
setSize( region.getRegionWidth(), region.getRegionHeight() );
} @Override
public void act(float delta) {
// TODO Auto-generated method stub
super.act(delta);
} @Override
public void draw(SpriteBatch batch, float parentAlpha) {
// TODO Auto-generated method stub
//batch.draw( region, region.getRegionX(), region.getRegionY(), region.getRegionWidth(), region.getRegionHeight() );
batch.draw( region, getX(), getY(), getWidth(), getHeight() );
super.draw(batch, parentAlpha);
}
}
资源类：
package com.fxb.flappy; import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.assets.AssetManager;
import com.badlogic.gdx.graphics.g2d.TextureAtlas;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.scenes.scene2d.ui.Skin; public class Assets {
public static Skin skin;
public static AssetManager manager;
public static TextureAtlas atlas;
public static TextureRegion[] sRegionBird; public static TextureRegion regionPipeUp;
public static TextureRegion regionPipeDown;
public static TextureRegion regionBack; public static void init(){
skin = new Skin( Gdx.files.internal( "skin/uiskin.json" ) );
atlas = new TextureAtlas( Gdx.files.internal( "data/bird.pack" ) ); sRegionBird = new TextureRegion[3];
for( int i=0; i<sRegionBird.length; ++i ){
sRegionBird[i] = atlas.findRegion( "bird_blue", i );
} regionPipeUp = atlas.findRegion( "bound_up" );
regionPipeDown = atlas.findRegion( "bound_down" );
regionBack = atlas.findRegion( "background" ); } public static void clean(){
if( skin != null ) skin.dispose();
if( atlas != null ) atlas.dispose(); }
}
常量及功能函数类：
package com.fxb.flappy; import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.scenes.scene2d.Actor;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.Image; public class Constant { enum GameState{ game_ready, game_on, game_preover, game_over };
public static GameState state = GameState.game_ready; public static float speedY = -1f;
public static float speedInc = -0.5f; public static void CenterInStage( Actor actor, Stage stage ){
actor.setPosition( stage.getWidth()/2-actor.getWidth()/2, stage.getHeight()/2-actor.getHeight()/2 );
} public static Image CreateImage( TextureRegion region0 ){
Image img = new Image( region0 );
img.setSize( region0.getRegionWidth(), region0.getRegionHeight() );
return img;
} public static boolean IsCollsion( Actor actor1, Actor actor2 ){
float x1 = actor1.getX(), y1 = actor1.getY(), w1 = actor1.getWidth(), h1 = actor1.getHeight();
float x2 = actor2.getX(), y2 = actor2.getY(), w2 = actor2.getWidth(), h2 = actor2.getHeight();
if( x1<x2 && x1+w1<x2 ){
return false;
}
else if( x2<x1 && x2+w2<x1 ){
return false;
}
else if( y1<y2 && y1+h1<y2 ){
return false;
}
else if( y2<y1 && y2+h2<y1 ){
return false;
} return true;
} }
大概就这样了，也是比较粗糙。自己试验了下，在android平台下感觉操作不太顺手，可能里面一些参数还是没有调整好，提升的空间挺大的！！
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