Продолжаем серию уроков о том, как сделать игру Flappy Bird для android. На этом уроке добавим движущиеся трубы, между которыми птице надо будет пролетать.
Код измененных классов проекта — под видео:
Bird.java
package info.fandroid.game.sprites; import com.badlogic.gdx.graphics.Texture; import com.badlogic.gdx.math.Vector3; /** * Created by Vitaly on 06.11.2015. */ public class Bird { private static final int MOVEMENT = 100; private static final int GRAVITY = -15; private Vector3 position; private Vector3 velosity; private Texture bird; public Bird(int x, int y){ position = new Vector3(x, y, 0); velosity = new Vector3(0, 0, 0); bird = new Texture("bird.png"); } public Vector3 getPosition() { return position; } public Texture getBird() { return bird; } public void update(float dt){ if (position.y > 0) velosity.add(0, GRAVITY, 0); velosity.scl(dt); position.add(MOVEMENT * dt, velosity.y, 0); if (position.y < 0) position.y = 0; velosity.scl(1 / dt); } public void jump(){ velosity.y = 250; } }
PlayState.java
package info.fandroid.game.states; import com.badlogic.gdx.Gdx; import com.badlogic.gdx.graphics.Texture; import com.badlogic.gdx.graphics.g2d.SpriteBatch; import com.badlogic.gdx.utils.Array; import info.fandroid.game.FlappyDemo; import info.fandroid.game.sprites.Bird; import info.fandroid.game.sprites.Tube; /** * Created by Vitaly on 06.11.2015. */ public class PlayState extends State { private static final int TUBE_SPACING = 125; private static final int TUBE_COUNT = 4; private Bird bird; private Texture bg; private Array<Tube> tubes; public PlayState(GameStateManager gsm) { super(gsm); bird = new Bird(50, 300); camera.setToOrtho(false, FlappyDemo.WIDTH / 2, FlappyDemo.HEIGHT / 2); bg = new Texture("bg.png"); tubes = new Array<Tube>(); for (int i = 0; i < TUBE_COUNT; i++){ tubes.add(new Tube(i * (TUBE_SPACING + Tube.TUBE_WIDTH))); } } @Override protected void handleInput() { if (Gdx.input.justTouched()) bird.jump(); } @Override public void update(float dt) { handleInput(); bird.update(dt); camera.position.x = bird.getPosition().x + 80; for (Tube tube : tubes){ if (camera.position.x - (camera.viewportWidth / 2) > tube.getPosTopTube().x + tube.getTopTube().getWidth()){ tube.reposition(tube.getPosTopTube().x + ((Tube.TUBE_WIDTH + TUBE_SPACING) * TUBE_COUNT)); } } camera.update(); } @Override public void render(SpriteBatch sb) { sb.setProjectionMatrix(camera.combined); sb.begin(); sb.draw(bg, camera.position.x - (camera.viewportWidth / 2), 0); sb.draw(bird.getBird(), bird.getPosition().x, bird.getPosition().y); for (Tube tube : tubes) { sb.draw(tube.getTopTube(), tube.getPosBotTube().x, tube.getPosTopTube().y); sb.draw(tube.getBottomTube(), tube.getPosBotTube().x, tube.getPosBotTube().y); } sb.end(); } @Override public void dispose() { } }
Tube.java
package info.fandroid.game.sprites; import com.badlogic.gdx.graphics.Texture; import com.badlogic.gdx.math.Vector2; import java.util.Random; /** * Created by Vitaly on 13.11.2015. */ public class Tube { public static final int TUBE_WIDTH = 52; private static final int FLUCTUATION = 130; private static final int TUBE_GAP = 100; private static final int LOWEST_OPENING = 120; private Texture topTube, bottomTube; private Vector2 posTopTube, posBotTube; private Random rand; public Texture getTopTube() { return topTube; } public Texture getBottomTube() { return bottomTube; } public Vector2 getPosTopTube() { return posTopTube; } public Vector2 getPosBotTube() { return posBotTube; } public Tube(float x){ topTube = new Texture("toptube.png"); bottomTube = new Texture("bottomtube.png"); rand = new Random(); posTopTube = new Vector2(x, rand.nextInt(FLUCTUATION) + TUBE_GAP + LOWEST_OPENING); posBotTube = new Vector2(x, posTopTube.y - TUBE_GAP - bottomTube.getHeight()); } public void reposition(float x){ posTopTube.set(x, rand.nextInt(FLUCTUATION) + TUBE_GAP + LOWEST_OPENING); posBotTube.set(x, posTopTube.y - TUBE_GAP - bottomTube.getHeight()); } }
Больше уроков:
Уроки по android разработке: тут
Дизайн android приложений: тут
Основы программирования на JAVA: тут
Инструменты android разработчика: тут
<<Урок 7. Flappy Bird: научим птичку летать | Делаем android игры на LibGDX
Урок 9. Flappy Bird: реализуем обнаружение столкновений птицы с трубами>>
Почему FLUCTUATION 130 ? как это понять)
Попробуйте изменить значение и поймете