Java LibGDX:BoundsInfrum和BoundingBox未按预期工作

我正在从json文件加载一个box2d场景。此场景包含一个固定装置，用于标记允许摄影机在其中移动的边界框。使用这种机制可以很好地处理左下界，但完全无法处理右上界，这很奇怪

以下是从文件加载边界框的零件：

PolygonShape shape = ((PolygonShape) fixture.getShape());
Vector2 vertex = new Vector2();
float boundLeft = world.startX, boundRight = world.startX, boundUp = world.startY, boundLow = world.startY; // The location of the camera as initial value

for (int i = 0; i < shape.getVertexCount(); i++) { // Itarate over each vertex in the fixture and set the boundary values
    shape.getVertex(i, vertex);
    vertex.add(body.getPosition());
    boundLeft = Math.min(vertex.x, boundLeft);
    boundLow = Math.min(vertex.y, boundLow);
    boundRight = Math.max(vertex.x, boundRight);
    boundUp = Math.max(vertex.y, boundUp);
}

// Build the bounding boxes with enough thickness to prevent tunneling on fast pans
world.boundLeft = new BoundingBox(new Vector3(boundLeft - 5, boundLow - 5, 0).scl(RenderingSystem.PPM), new Vector3(boundLeft, boundUp + 5, 0).scl(RenderingSystem.PPM));
world.boundRight = new BoundingBox(new Vector3(boundRight, boundLow - 5, 0).scl(RenderingSystem.PPM), new Vector3(boundRight + 5, boundUp + 5, 0).scl(RenderingSystem.PPM));
world.boundUp = new BoundingBox(new Vector3(boundLeft - 5, boundUp, 0).scl(RenderingSystem.PPM), new Vector3(boundRight + 5, boundUp + 5, 0).scl(RenderingSystem.PPM));
world.boundLow = new BoundingBox(new Vector3(boundLeft - 5, boundLow - 5, 0).scl(RenderingSystem.PPM), new Vector3(boundRight + 5, boundLow, 0).scl(RenderingSystem.PPM));
// world is a class containing some properties, including these BoundingBoxes
// RenderingSystem.PPM is the amount of pixels per metre, in this case 64

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嗯，我知道了。猜猜我的world.startx和world.startY的定义是什么？没错，它们在屏幕坐标中：

world.startX = start.getPosition().x * RenderingSystem.PPM;
world.startY = start.getPosition().y * RenderingSystem.PPM;

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这导致Math.max总是选择world.startX和world.startY，因为相比之下，这些值绝对是巨大的。

为什么不跟libdx的家伙谈谈呢？有很多人抱怨这个库！哦，我不是在抱怨。LibGDX是我一生的挚爱，我随时都会嫁给它，只是我经常不如LibGDX的人聪明。

world.startX = start.getPosition().x * RenderingSystem.PPM;
world.startY = start.getPosition().y * RenderingSystem.PPM;