Java 安第涅的物理工厂由哪一类取代？

我有个小问题。 昨晚我在寻找一种方法来取代这个班，但我什么也没找到 在旧版本的andengine教程中，他们使用PhysicsFactory.classe创建fixtureDef。 在最近的一个例子中，我看到了类似的情况

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

但是我不知道physicsFactory和上面的代码是不是有着相同的意思，只是方式不同，所以现在我有点困惑

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有人可以帮助？

从PhysicFactory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;
}

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看起来是一样的，但是你为什么不直接使用PhysicsFactory呢？

我也很困惑。你到底在找什么？我问我上面这个参数的fixtureDef是否意味着和他们使用physicsFactor创建boxbody时做的一样？你是对的，我不知道为什么以前不这样做。谢谢你的帮助。我会这样做的，圣诞快乐