0

我目前正在阅读一些关于 android 开发和 libgdx/scene2d atm 的教程，但卡在了 touchevents 上：

对于初学者，我正在实施棋盘游戏。到目前为止，我设法绘制了棋盘和一些 meeples（玩家令牌），并将它们的位置调整到正确的坐标。当我开始使用 libgdx 时，我还成功实施了第一次测试，以查看触摸输入是否正常工作。测试看起来像这样：

if(Gdx.input.isTouched()){
        touchPos.set(Gdx.input.getX(), Gdx.input.getY(), 0);
        camera.unproject(touchPos);
        stone.x=touchPos.x - stone.width/2;
        stone.y=touchPos.y - stone.height/2;

到现在为止，由于一些非常方便的功能，我重新安排了我的代码以使用 scene2d。然而，尽管我遵循了一些相当简单的教程，但似乎我无法让 touchevents 与 scene2d 一起工作。由于其中一些引用了最近对scene2d的一些重大更改，我想知道这些教程是否可能已经过时，希望你们能帮助我解决我的问题:) 我将尝试仅将我的代码的相关部分粘贴到此处以提供最小的我的非工作代码示例。当然，我也很高兴有关如何“改进”我的代码的任何提示，因为我仍在学习并且可能在这里打破一些约定^^

让我们从我的演员班开始：

//deleted: imports

public class Player extends Actor{
    private int xval; //x Position of the Player on the board
    private int yval; //y Position of the Player on the board
    private Color color;
    private TextureRegion playerTexture;
    //deleted: some variables that are unimportant for touchevents

    public Player(int x, int y, TextureRegion texture){
        //initializing some Variables with default values
            this.xval = x;
            this.yval = y;
            color = new Color(1,1,1,1);

            playerTexture = texture;
            this.setTouchable(Touchable.enabled); //this should be set by default, but i added it just to be sure.

        //setBounds seems to be necessary in addition to the "touchable" flag to be able to "grab" or "touch" Actors.
        //getX and getY are methods of the actor class which i do not overwrite. I use distinct getters and setters to modify the Variables xval and yval.
            setBounds(getX(), getY(), playerTexture.getRegionWidth(), playerTexture.getRegionHeight()); 

        //now i implement the InputListener. This doesnt seem to get called, since the "touch started" message doesn't appear in LogCat.
        //In Theory the testevent should move the meeple one space to the right. 
        //To do that i call event.getTarget() which returns the actor of which the TouchDown is called. I then cast it to my Actor class (Player) and set xval to xval+1.
            this.addListener(new InputListener(){
            public boolean touchDown(InputEvent event, float x, float y, int pointer, int buttons){
                Gdx.app.log("Example", "touch started at (" + x + ", " + y + ")");
                ((Player)event.getTarget()).setXf(((Player)event.getTarget()).getXf()+1);
                return true;
                }
            });
    }

    //This is my draw method, which just sets the color of my meeple and then draws it to its current position.
    public void draw(Batch batch, float alpha){
        batch.setColor(color);
        batch.draw(playerTexture, getX(), getY());      
    }

    //deleted: several getters and setters
}

因此，如果我做对了，gdx inputProcessor 将管理所有输入。如果我将 Gdx InputProcessor 设置为包含演员的舞台，它会在发生事件（例如 touchDown）的情况下调用舞台上所有演员的 inputProcessor。因此，由于我刚刚在我的类中添加了一个包含 touchDown 的类，因此它应该在实际触摸到 actor 的情况下处理 touchDown 事件。用于验证的命中框由我的 Player 类中的语句“setBounds”设置。

我在我的 ApplicationListener 类中实现了这个：

//deleted: imports

public class QuoridorApplicationListener implements ApplicationListener{

    Stage stage;
    OrthographicCamera camera;
    //deleted: several variable declarations.       

    //deleted: constructor - this only fills some of my variables with values depending on game settings.

    @Override
    public void create() {
        //set stage - since "stage = new Stage(800,400,false)" doesn't seem to work anymore, i did set up a viewport manually. If you got suggestions how to this straightforward, please leave a note :)
        Gdx.app.log("Tag", "game started");
        camera = new OrthographicCamera();
        camera.setToOrtho(false, 800, 480);
        Viewport viewport = new Viewport() {};
        viewport.setCamera(camera);
        stage = new Stage(viewport);
        Gdx.input.setInputProcessor(stage); //like i described above, this should forward incoming touchevents to the actors on the stage.

        //deleted: setting textures, music, setting up the board (the boardtiles are actors which are added to the stage) 

        //deleted: setting TextureRegion, player colors, player positions and player attributes.
            for (int i = 0; i < playercount; i++){
                stage.addActor(players[i]);
            }
    }

    //deleted: dispose(), pause(), resume(), resize() methods.

    @Override
    public void render() {
        camera.update();

        for (int i=0; i< playercount; i++){
            players[i].setX(/*Formula to determine x-coordinates from Player.xval*/);
            players[i].setY(/*Formula to determine x-coordinates from Player.yval*/);
    } 

    stage.act(Gdx.graphics.getDeltaTime());
    stage.draw();
    }
}

我无法弄清楚我缺少什么才能让 touchevents 正常工作。所以我希望你能帮助我:) 提前非常感谢！

4

1 回答 1

1

我认为您的问题源于您手动创建 Viewport 对象，该对象在内部处理非投影。代替

stage = new Stage(800,400,false);

你应该使用

stage = new Stage();

一旦发生调整大小事件，要将视口调整为正确的大小，您需要调用

stage.getViewport().update( newWidth, newHeight )

在您的 ApplicationListener 的调整大小方法中。

于 2014-03-26T14:39:02.703 回答