什么类代替andengine中的物理工厂？

Question

我有一个小问题。 昨晚我在寻找一种方法来替换这个类，但我没有找到任何东西 在旧版本的andengine教程中，他们使用“PhysicsFactory.class”来创建一个fixtureDef。 在最近的一个例子中，我看到了类似的东西

FixtureDef ballShapeDef = new FixtureDef();
ballShapeDef.shape = circle;
ballShapeDef.density = 1.0f;
ballShapeDef.friction = 0.2f;
ballShapeDef.restitution = 0.8f;
ballBody.createFixture(ballShapeDef);

但我不知道physicsFactory 和上面的这段代码是否意味着相同但方式不同，所以现在我有点困惑。

有人可以帮忙吗？

Answer 1

来自 PhysicsFactory 类的源代码：

public static FixtureDef createFixtureDef(final float pDensity, final float pElasticity, final float pFriction) {
    return PhysicsFactory.createFixtureDef(pDensity, pElasticity, pFriction, false);
}

public static FixtureDef createFixtureDef(final float pDensity, final float pElasticity, final float pFriction, final boolean pSensor) {
    final FixtureDef fixtureDef = new FixtureDef();
    fixtureDef.density = pDensity;
    fixtureDef.restitution = pElasticity;
    fixtureDef.friction = pFriction;
    fixtureDef.isSensor = pSensor;
    return fixtureDef;
}

public static FixtureDef createFixtureDef(final float pDensity, final float pElasticity, final float pFriction, final boolean pSensor, final short pCategoryBits, final short pMaskBits, final short pGroupIndex) {
    final FixtureDef fixtureDef = new FixtureDef();
    fixtureDef.density = pDensity;
    fixtureDef.restitution = pElasticity;
    fixtureDef.friction = pFriction;
    fixtureDef.isSensor = pSensor;
    final Filter filter = fixtureDef.filter;
    filter.categoryBits = pCategoryBits;
    filter.maskBits = pMaskBits;
    filter.groupIndex = pGroupIndex;
    return fixtureDef;
}

看起来一样，但你为什么不直接使用 PhysicsFactory 呢？