ActuatorEntity.java 文件源码

public ActuatorEntity replaceCameraActuator(Camera camera, short height,
        float damping, float minDistanceX, float minDistanceY,
        String followTagEntity) {
    CameraActuator component = (CameraActuator) recoverComponent(ActuatorComponentsLookup.CameraActuator);
    if (component == null) {
        component = new CameraActuator(camera, height, damping,
                minDistanceX, minDistanceY, followTagEntity);
    } else {
        component.actuator = (indexOwner) -> {
            Set<GameEntity> followEntities = Indexed
                    .getTagEntities(followTagEntity);
            for (GameEntity followEntity : followEntities) {
                RigidBody rc = followEntity.getRigidBody();
                Transform transform = rc.body.getTransform();
                Vector3 position = camera.position;
                position.x += (transform.getPosition().x + minDistanceX - position.x)
                        * damping;
                position.y += (transform.getPosition().y + minDistanceY - position.y)
                        * height;
            }
        };
    }
    replaceComponent(ActuatorComponentsLookup.CameraActuator, component);
    return this;
}