java - Box2d 内存泄漏

Question

我已确定 box2d 导致内存泄漏。仅仅 20 分钟后，它就从占用应用程序内存的 10% 一路上升到 50%。游戏开始时的物体数量为 100,000。这个数字(即使在 GC 之后)上升到 150 万以上。该应用程序不仅在 Android 上运行缓慢，而且在桌面上也开始运行得很差。最初运行良好，但 5 分钟后开始显得缓慢。我将在下面链接相关代码。但首先，这里有一些更多信息:

我需要动态更改这些主体的固定装置尺寸。所以我的解决方案是每帧销毁/重新创建适当大小的装置。使用box2d的对象一共有8个(都与下面的代码相同)。我认为这些物体是唯一潜在的泄漏点。

对于我之前提到的 8 个敌人对象，每帧都会调用下面的方法。我还应该说，每次调用时都会将值“true”传递到此方法中。正如您将看到的，我正在处理固定装置和形状，因此我不确定如何发生内存泄漏。

private void createFixtures(boolean remove) {

    if (remove) {
        if (fixture_inner != null) {
            if(body.getFixtureList().contains(fixture_inner, false)) {
                body.destroyFixture(fixture_inner);
            }
        }
        if (fixture_outer != null) {
            if(body.getFixtureList().contains(fixture_outer, false)) {
                body.destroyFixture(fixture_outer);
            }
        }
        if (fixture_gap != null) {
            if(body.getFixtureList().contains(fixture_gap, false)) {
                body.destroyFixture(fixture_gap);
            }
        }
    }

    if (getInnerBounds() != null) {
        FixtureDef fixtureDef_inner = new FixtureDef();
        PolygonShape shape_inner = new PolygonShape();
        shape_inner.set(getInnerBounds().getTransformedVertices());
        fixtureDef_inner.shape = shape_inner;
        fixtureDef_inner.filter.categoryBits = Config.CATEGORYBIT_BLOCKER;
        fixtureDef_inner.filter.maskBits = Config.CATEGORYBIT_PLAYER;
        fixtureDef_inner.isSensor = true;
        fixture_inner = body.createFixture(fixtureDef_inner);
        BlockerFixtureUserData fixtureUserData_inner = new BlockerFixtureUserData(this, gameObjects.indexOf(this, false));
        fixture_inner.setUserData(fixtureUserData_inner);

        shape_inner.dispose();
    }

    if (getOuterBounds() != null) {
        FixtureDef fixtureDef_outer = new FixtureDef();
        PolygonShape shape_outer = new PolygonShape();
        shape_outer.set(getOuterBounds().getTransformedVertices());
        fixtureDef_outer.shape = shape_outer;
        fixtureDef_outer.filter.categoryBits = Config.CATEGORYBIT_BLOCKER;
        fixtureDef_outer.filter.maskBits = Config.CATEGORYBIT_PLAYER;
        fixtureDef_outer.isSensor = true;
        fixture_outer = body.createFixture(fixtureDef_outer);
        BlockerFixtureUserData fixtureUserData_outer = new BlockerFixtureUserData(this, gameObjects.indexOf(this, false));
        fixture_outer.setUserData(fixtureUserData_outer);

        shape_outer.dispose();
    }

    if (getGapBounds() != null) {
        FixtureDef fixtureDef_gap = new FixtureDef();
        PolygonShape shape_gap = new PolygonShape();
        shape_gap.set(getGapBounds().getTransformedVertices());
        fixtureDef_gap.shape = shape_gap;
        fixtureDef_gap.filter.categoryBits = Config.CATEGORYBIT_BLOCKERGAP;
        fixtureDef_gap.filter.maskBits = Config.CATEGORYBIT_PLAYER;
        fixtureDef_gap.isSensor = true;
        fixture_gap = body.createFixture(fixtureDef_gap);
        BlockerFixtureUserData fixtureUserData_gap = new BlockerFixtureUserData(this, gameObjects.indexOf(this, false));
        fixture_gap.setUserData(fixtureUserData_gap);

        shape_gap.dispose();
    }
}

播放器也有一个类似的方法，可以做同样的事情，只是为播放器指定。

 private void createFixture(boolean remove) {

    if (remove) {
        body.destroyFixture(fixture);
    }

    BodyDef bodyDef = new BodyDef();
    bodyDef.type = BodyDef.BodyType.DynamicBody;
    bodyDef.position.set(0, 0);
    body = world.createBody(bodyDef);
    FixtureDef fixtureDef = new FixtureDef();
    CircleShape circle = new CircleShape();
    circle.setRadius(getWidth() / 2);
    circle.setPosition(new Vector2(0, getY() + getHeight() / 2));
    fixtureDef.shape = circle;
    fixtureDef.filter.categoryBits = Config.CATEGORYBIT_PLAYER;
    fixture = body.createFixture(fixtureDef);

    circle.dispose();
}

世界的处理是在我的主游戏类中。但值得注意的是(也许？)该游戏目前只有 1 个屏幕。

如果您需要任何其他信息，请随时询问!太感谢了!

Answer 1

我的问题是，我在播放器 createFixture 方法中实例化一个主体，该方法每帧都会调用该主体来编辑夹具大小。我将其移至构造函数。