java - LibGDX 中的多个敌人阵列

Question

我正在尝试制作一个多敌人阵列，其中每 30 秒就有一颗新子弹来自一个随机点。如果单击子弹，它应该会消失，并且会出现像爆炸一样的爆裂声。如果子弹击中球，球就会弹出。 所以子弹应该变成不同的 Sprite 或纹理。与流行球相同。

但是所有发生的事情就是如果被触摸子弹会弹出而没有其他事情发生。如果修改了，项目符号会一直闪烁，因为更新太多了。

我在代码中添加了评论来解释更多问题。

下面是代码。 如果需要更多代码，我会提供。

谢谢

public class GameRenderer {

private GameWorld myWorld;
private OrthographicCamera cam;
private ShapeRenderer shapeRenderer;
private SpriteBatch batcher;

// Game Objects
private Ball ball;
private ScrollHandler scroller;
private Background background;
private Bullet bullet1;
private BulletPop bPop;

private Array<Bullet> bullets;

    // This is for the delay of the bullet coming one by one every 30 seconds.
/** The time of the last shot fired, we set it to the current time in nano when the object is first created */
double lastShot = TimeUtils.nanoTime();
  /** Convert 30 seconds into nano seconds, so 30,000 milli = 30 seconds */
 double shotFreq = TimeUtils.millisToNanos(30000);

// Game Assets
private TextureRegion bg, bPop;
private Animation bulletAnimation, ballAnimation;
private Animation ballPopAnimation;

public GameRenderer(GameWorld world) {
    myWorld = world;
    cam = new OrthographicCamera();
    cam.setToOrtho(true, 480, 320);

    batcher = new SpriteBatch();
    // Attach batcher to camera
    batcher.setProjectionMatrix(cam.combined);

    shapeRenderer = new ShapeRenderer();
    shapeRenderer.setProjectionMatrix(cam.combined);

            // This is suppose to produce 10 bullets at random places on the background.
    bullets = new Array<Bullet>();
    Bullet bullet = null;
    float bulletX = 00.0f;
    float bulletY = 00.0f;
    for (int i = 0; i < 10; i++) {
        bulletX = MathUtils.random(-10, 10);
        bulletY = MathUtils.random(-10, 10);
        bullet = new Bullet(bulletX, bulletY);

        AssetLoader.bullet1.flip(true, false);
        AssetLoader.bullet2.flip(true, false);

        bullets.add(bullet);
    }

    // Call helper methods to initialize instance variables
    initGameObjects();
    initAssets();
}

private void initGameObjects() {
    ball = GameWorld.getBall();
    bullet1 = myWorld.getBullet1();
    bPop = myWorld.getBulletPop();
    scroller = myWorld.getScroller();
}

private void initAssets() {
    bg = AssetLoader.bg;
    ballAnimation = AssetLoader.ballAnimation;
    bullet1Animation = AssetLoader.bullet1Animation;
    ballPopAnimation = AssetLoader.ballPopAnimation;
}

    // This is to take the bullet away when clicked or touched.
public void onClick() {
    for (int i = 0; i < bullets.size; i++) {
        if (bullets.get(i).getBounds().contains(0, 0))
            bullets.removeIndex(i);
    }
}

private void drawBackground() {
    batcher.draw(bg1, background.getX(), background.getY(), background.getWidth(), backgroundMove.getHeight());
}

public void render(float runTime) {

    Gdx.gl.glClearColor(0, 0, 0, 1);
    Gdx.gl.glClear(GL30.GL_COLOR_BUFFER_BIT);

    batcher.begin();
    // Disable transparency 
    // This is good for performance when drawing images that do not require
    // transparency.
    batcher.disableBlending();

    drawBackground();

    batcher.enableBlending();

            // when the bullet hits the ball, it should be disposed or taken away and a ball pop sprite/texture should be put in its place
    if (bullet1.collides(ball)) {
                    // draws the bPop texture but the bullet does not go just keeps going around, and the bPop texture goes.
        batcher.draw(AssetLoader.bPop, 195, 273);
    }

    batcher.draw(AssetLoader.ballAnimation.getKeyFrame(runTime), ball.getX(), ball.getY(), ball.getWidth(), ball.getHeight());

           // this is where i am trying to make the bullets come one by one, and if removed via the onClick() then bPop animation 
           // should play but does not???
    if(TimeUtils.nanoTime() - lastShot > shotFreq){
         // Create your stuff
        for (int i = 0; i < bullets.size; i++) {
            bullets.get(i);
            batcher.draw(AssetLoader.bullet1Animation.getKeyFrame(runTime), bullet1.getX(), bullet1.getY(), bullet1.getOriginX(), bullet1.getOriginY(), bullet1.getWidth(), bullet1.getHeight(), 1.0f, 1.0f, bullet1.getRotation());
            if (bullets.removeValue(bullet1, false)) {
                batcher.draw(AssetLoader.ballPopAnimation.getKeyFrame(runTime), bPop1.getX(), bPop1.getY(), bPop1.getWidth(), bPop1.getHeight());
            }
        }
         /* Very important to set the last shot to now, or it will mess up and go full auto */
         lastShot = TimeUtils.nanoTime();
      }

    // End SpriteBatch
    batcher.end();
}
}

谢谢

Answer 1

嗯...为什么要在添加新项目符号的 if 内部绘制图形？这样，您绘制的所有内容每 30 秒只会淹没一帧。在 if 中，您应该一直只添加/删除对象并将它们绘制在外部。 if 里面没有绘图!