Java Libgdx GestureDetector pan方法在设备中速度较慢/较快

我在libgdx中有一个平铺贴图，我正在类中实现GestureDetector pan方法

我想发生的是，当用户使用平移方法时，屏幕被拖动到该方向，有点像用户用手指移动平铺地图

当我在我的桌面上测试代码时，拖动是非常好的，地图以完美的速度和平滑度拖动

但是，当我在不同的android设备上测试相同的代码时，拖动的速度要么太慢，要么太快。有时，小手指的移动会在整个屏幕上移动地图

如何使pan方法在所有设备上保持一致？我的代码：

public class SinglePlayerGame extends GestureDetector.GestureAdapter implements Screen{

private TiledMap map;
private OrthogonalTiledMapRenderer mapRenderer;
private OrthographicCamera camera;
private Viewport viewport;
private Main game;

public SinglePlayerGame(Main game){
    this.game = game;
    this.camera = new OrthographicCamera();
    this.viewport = new StretchViewport(Main.VIRTUAL_WIDTH, Main.VIRTUAL_HEIGHT, camera);
    this.map = new TmxMapLoader().load("map_1.tmx");
    this.mapRenderer = new OrthogonalTiledMapRenderer(map);
    this.camera.position.set(viewport.getWorldWidth() / 2, viewport.getWorldHeight() / 2, 0);

    Gdx.input.setInputProcessor(new GestureDetector(this));

    resize(Main.VIRTUAL_WIDTH, Main.VIRTUAL_HEIGHT);
}

public boolean pan(float x, float y, float deltaX, float deltaY){
    camera.translate(-deltaX, deltaY);
    camera.update();
    return false;
}

@Override
public void render(float delta){
    update();
    game.batch.setProjectionMatrix(camera.combined);
    game.batch.begin();
    game.batch.end();

    mapRenderer.render();
}

public void update(){
    camera.update();
    mapRenderer.setView(camera);
}

@Override
public void resize(int width, int height){
    viewport.update(width, height);
}

public void show(){}
public void pause(){}
public void resume(){}
public void hide(){}

@Override
public void dispose(){

}

---

GestureDetector单位以屏幕像素为单位，因此您需要根据相机和视口的定义将其缩放到世界单位：

public boolean pan(float x, float y, float deltaX, float deltaY){
    float scaleX = viewport.getWorldWidth() / (float)viewport.getScreenWidth();
    float scaleY = viewport.getWorldHeight() / (float)viewport.getScreenHeight();
    camera.translate((int)(-deltaX * scaleX), (int)(deltaY * scaleY));
    camera.update();
    return false;
}