修改[已解决]

Question

我试图制作2D汽车侧滚动游戏。我使用轮接头来移动汽车。

这是汽车不动的截图。

当汽车行驶时。你可以看到精灵位置不正确。

这是汽车对象的构造函数。

    BodyDef bodyDef = new BodyDef();
    bodyDef.type = BodyType.DynamicBody;
    bodyDef.position.set(x, y);

    //Chassis
    PolygonShape chassisShape = new PolygonShape();
    chassisShape.setAsBox(width, height);

    chassisFixtureDef.shape = chassisShape;

    chassis = world.createBody(bodyDef);
    // Car Body Sprite
    Sprite body = new Sprite(new Texture(Gdx.files.internal("data/body.png")));
    body.setSize(5f, 2f);
    body.setPosition(0f, 0);
    body.setOrigin(body.getWidth() / 2, body.getHeight() / 2);
    chassis.setUserData(body);
    chassis.createFixture(chassisFixtureDef);

    //Left Wheel
    CircleShape wheelShape = new CircleShape();
    wheelShape.setRadius(height / 1.5f);

    wheelFixtureDef.shape = wheelShape;

    leftWheel = world.createBody(bodyDef);
    //Sprite Test
    wheel = new Sprite(new Texture(Gdx.files.internal("data/wheel.png")));
    wheel.setSize(1f, 1f);
    wheel.setOrigin(wheel.getWidth() / 2, wheel.getHeight() / 2);
    leftWheel.setUserData(wheel);
    leftWheel.createFixture(wheelFixtureDef);

    //Right Wheel
    rightWheel = world.createBody(bodyDef);
    rightWheel.setUserData(wheel);
    rightWheel.createFixture(wheelFixtureDef);

    //Left Axis
    WheelJointDef def = new WheelJointDef();
    def.bodyA = chassis;
    def.bodyB = leftWheel;
    def.frequencyHz = chassisFixtureDef.density;
    def.localAnchorA.set(-width / 2 * 1.7f + wheelShape.getRadius(), -height / 2 * 2.5f);
    def.localAxisA.set(Vector2.Y);
    def.maxMotorTorque = chassisFixtureDef.density * 30;
    leftAxis = (WheelJoint) world.createJoint(def);

    def.bodyB = rightWheel;
    def.localAnchorA.x *= -1;

    rightAxis = (WheelJoint) world.createJoint(def);

以下是在屏幕上绘制与身体相关的精灵的代码。

for (Body body : bodies)
        if (body.getUserData() != null && body.getUserData() instanceof Sprite){
            Sprite sprite = (Sprite)body.getUserData();
            sprite.setPosition(body.getPosition().x - sprite.getWidth()/2, body.getPosition().y - sprite.getHeight()/2);
            sprite.setRotation(body.getAngle() * MathUtils.radiansToDegrees);
            sprite.draw(batch);
        }

很抱歉，如果无法使我的问题变得非常具体或明确。我是Stackoverflow的新手。

修改[已解决]

刚放入渲染方法[正确]

renderer.render(world, camera.combined);

在gl.clear之后

在屏幕上绘制所有内容之后，我正在这样做。 [错误]

Answer 1

似乎是在渲染后更新物理，因为物理调试的多边形已经比精灵显示的更多。您可以尝试先更新物理，然后绘制您的精灵。

代码/计算本身不应该出错。

如果您已经这样做，可能是因为您的物理模拟更新比渲染循环更频繁。

LibGDX Box2D移动体的精灵位置不正确

修改[已解决]

1 个答案: