Question

我正在AndEngine中开发我几乎已经完成了我的游戏，但不幸的是，由于我在更新循环中检查了很多事情，因此偶尔也会遇到低fps。我现在明白这是问题所在，而且我一直试图用Box2d改变它，如理论上，这正是我需要的，但我无法掌握它！

基本上，我有4个阵列;一个用于汽车，三个用于敌人。汽车从左向右行驶，如果他们与这些敌人中的任何一个接触，它的速度就会变化。当我加载阵列时，是否必须为每个汽车和敌人分配一个物体？然后我该如何检查？我运行for循环，然后运行'isBodyContacted（carBody，iceBergBody）;'在更新看？这有点过分了！

供参考，加载我的车：

private void loadCar() {
            for (int i = 0; i < rManager.getInstance().carArray.length; i++) {
                    rManager.getInstance().carArray[i] = new Car(new Sprite(
                                    rManager.getInstance().spawnPoint[i].getSpawnPos().x,
                                    rManager.getInstance().spawnPoint[i].getSpawnPos().y,
                                    rManager.getInstance().car_region,
                                    engine.getVertexBufferObjectManager()) {
                            @Override
                            public boolean onAreaTouched(final TouchEvent pSceneTouchEvent,
                                            final float pTouchAreaLocalX,
                                            final float pTouchAreaLocalY) {

                                    if (pSceneTouchEvent.isActionMove()
                                                    && GameManager.getInstance().getDebugMode() == true) {
                                            this.setPosition(pSceneTouchEvent.getX(),
                                                            pSceneTouchEvent.getY());
                                    }
                                    return true;
                            }
                    });
            }

            for (int i = 0; i < rManager.getInstance().carArray.length; i++) {
                    rManager.getInstance().carArray[i].getCarSprite().setScale(0.5f);
                    rManager.getInstance().carArray[i].getCarSprite().setAnchorCenter(
                                    0, 0);
                    colourX = (randNumber(2, 9));
                    colourY = (randNumber(2, 9));
                    colourZ = (randNumber(2, 9));
                    colourX /= 10;
                    colourY /= 10;
                    colourZ /= 10;
                    rManager.getInstance().carArray[i].getCarSprite().setColor(colourZ,
                                    colourY, colourZ);
                    attachChild(rManager.getInstance().carArray[i].getCarSprite());
                    this.registerTouchArea(rManager.getInstance().carArray[i]
                                    .getCarSprite());
                    this.setTouchAreaBindingOnActionDownEnabled(true);
            }
    }

装载敌人..

void loadIceBerg() {
            for (int i = 0; i < rManager.getInstance().iceBergArray.length; i++) {
                    rManager.getInstance().iceBergArray[i] = new IceBergEnemy(
                                    new Sprite(randNumber(200, 700), randNumber(0, 480),
                                                    rManager.getInstance().iceBerg_region,
                                                    engine.getVertexBufferObjectManager()) {
                                            @Override
                                            public boolean onAreaTouched(final TouchEvent pSceneTouchEvent, final float pTouchAreaLocalX, final float pTouchAreaLocalY) {
                                                    this.setPosition(pSceneTouchEvent.getX(), pSceneTouchEvent.getY());
                                                    if (this.getY() > rManager.getInstance().camera.getHeight() - (this.getHeight() / 2) || this.getY() < 0 + (this.getHeight() / 2))
                                                    {
                                                            this.setPosition(200 - (pDifficultyLevel * 20),
                                                                            -100);
                                                                                                                            showScore(50, " ice berg!");
                                                            this.setVisible(false);

                                                    }      

                                                    if(pSceneTouchEvent.isActionUp())
                                                    {
                                                            updateScore(50);
                                                            GameManager.getInstance().updateTotalIceBergEnemiesKilled();

                                                    }



                                                    return true;
                                            }
                                    });

                    rManager.getInstance().iceBergArray[i].getIceBergSprite()
                                    .setPosition(
                                                    rManager.getInstance().iceBergArray[i]
                                                                    .getIceBergSprite().getX(),
                                                    rManager.getInstance().iceBergArray[i]
                                                                    .getIceBergSprite().getY());
                    rManager.getInstance().iceBergArray[i].getIceBergSprite().setScale(
                                    0.8f);
                    this.registerTouchArea(rManager.getInstance().iceBergArray[i]
                                    .getIceBergSprite());
                    this.setTouchAreaBindingOnActionDownEnabled(true);

                    attachChild(rManager.getInstance().iceBergArray[i]
                                    .getIceBergSprite());
            }
    }

有些碰撞！

else if (rManager.getInstance().iceBergArray[2]
                                                    .getIceBergSprite().collidesWith(
                                                                    rManager.getInstance().carArray[r]
                                                                                    .getCarSprite())) {
                                            rManager.getInstance().carArray[r].setCarSpeed(0f);
                                    }

                                    else if (rManager.getInstance().iceBergArray[3]
                                                    .getIceBergSprite().collidesWith(
                                                                    rManager.getInstance().carArray[r]
                                                                                    .getCarSprite())) {
                                            rManager.getInstance().carArray[r].setCarSpeed(0f);
                                    }

                                    else if (rManager.getInstance().iceBergArray[4]
                                                    .getIceBergSprite().collidesWith(
                                                                    rManager.getInstance().carArray[r]
                                                                                    .getCarSprite())) {
                                            rManager.getInstance().carArray[r].setCarSpeed(0f);
                                    }

                                    else if (rManager.getInstance().iceBergArray[5]
                                                    .getIceBergSprite().collidesWith(
                                                                    rManager.getInstance().carArray[r]
                                                                                    .getCarSprite())) {
                                            rManager.getInstance().carArray[r].setCarSpeed(0f);
                                    }

我找到了很多教程，但似乎都没有引用一个对象数组，这正是我需要的。如果有人可以帮助我或提供某种快速教程，那将非常感激。谢谢！

Answer 1

您不应使用任何循环来检查每种可能的碰撞组合。相反，您应该为整个世界注册一个监听器并在您的身体上设置用户数据（例如type =“car”，“enemy”）。然后在监听器中，您只需检查哪两个对象发生碰撞。看看这个例子：

http://www.andengine.org/forums/gles2/collision-events-t7140.html#p31300

Box2d与阵列的碰撞检测

1 个答案: