缩放触摸板以与Libgdx中的Box2d一起使用

Question

我正在尝试通过PPM值来扩展事物，就像我正在观看的教程那样，但后来我意识到我有一个触摸板，而且教程已经完成，所以我不知道该怎么办将其与其他一切一起扩展。我尝试过的所有东西都不起作用。

这是我的playcreen文件：你可以看到我在那里有触摸板，但没有缩放，其他一切都缩放，工作正常。 注意：我的PPM值是浮点数100

package com.cyan.rdm.Screens;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input;
import com.badlogic.gdx.Screen;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.maps.MapObject;
import com.badlogic.gdx.maps.objects.RectangleMapObject;
import com.badlogic.gdx.maps.tiled.TiledMap;
import com.badlogic.gdx.maps.tiled.TmxMapLoader;
import com.badlogic.gdx.maps.tiled.renderers.OrthogonalTiledMapRenderer;
import com.badlogic.gdx.math.Rectangle;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.physics.box2d.Body;
import com.badlogic.gdx.physics.box2d.BodyDef;
import com.badlogic.gdx.physics.box2d.Box2DDebugRenderer;
import com.badlogic.gdx.physics.box2d.FixtureDef;
import com.badlogic.gdx.physics.box2d.PolygonShape;
import com.badlogic.gdx.physics.box2d.World;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.Label;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;
import com.badlogic.gdx.scenes.scene2d.ui.Table;
import com.badlogic.gdx.scenes.scene2d.ui.Touchpad;
import com.badlogic.gdx.scenes.scene2d.utils.Drawable;
import com.badlogic.gdx.utils.viewport.StretchViewport;
import com.badlogic.gdx.utils.viewport.Viewport;
import com.cyan.rdm.Sprites.Char;
import com.cyan.rdm.rdmGame;

public class PlayScreen implements Screen{

    private rdmGame game;
    private Stage stage;
    private OrthographicCamera cam;
    private Viewport stretchport;
    private Char character;
    private Label speedLabel;
    private boolean speedLabelVisibility = false;
    private boolean touchPadVisibility = true;

    // Map Loader
    private TmxMapLoader mploader;
    private TiledMap map;
    private OrthogonalTiledMapRenderer renderer;

    // Box 2D
    private World world;
    private Box2DDebugRenderer b2dr;

    // TouchPad

    public Touchpad touchpad;
    public Touchpad.TouchpadStyle touchpadStyle;
    public Skin touchpadSkin;
    public Drawable touchBackground;
    public Drawable touchKnob;

    public PlayScreen(rdmGame game) {

        this.game = game;

        cam = new OrthographicCamera();
        stretchport = new StretchViewport(rdmGame.V_WIDTH / rdmGame.PPM, rdmGame.V_HEIGHT / rdmGame.PPM, cam);

        stage = new Stage(stretchport, game.batch);
        Gdx.input.setInputProcessor(stage);

        Label.LabelStyle font = new Label.LabelStyle(new BitmapFont(), Color.WHITE);

        Table table = new Table();
        table.setPosition(15 / rdmGame.PPM, 185 / rdmGame.PPM);

        speedLabel = new Label(String.format("%03d", character.SPEED), font);
        table.add(speedLabel).expandX();

        // Map
        mploader = new TmxMapLoader();
        map = mploader.load("temp_tileset2.tmx");
        renderer = new OrthogonalTiledMapRenderer(map, 1 / rdmGame.PPM);
        cam.position.set(stretchport.getWorldWidth() / 2,stretchport.getWorldHeight() /2, 0);

        // Box 2D

        world = new World(new Vector2(0, 0), true);
        b2dr = new Box2DDebugRenderer();

        character = new Char(world);

        BodyDef bodyDef = new BodyDef();
        PolygonShape hitbox = new PolygonShape();
        FixtureDef fixtureDef = new FixtureDef();
        Body body;

        // Normal Wall Collision
        for(MapObject object : map.getLayers().get(2).getObjects().getByType(RectangleMapObject.class)) {
            Rectangle rectangle = ((RectangleMapObject) object).getRectangle();

            bodyDef.type = BodyDef.BodyType.StaticBody;
            bodyDef.position.set((rectangle.getX() + rectangle.getWidth() /2) / rdmGame.PPM ,(rectangle.getY() + rectangle.getHeight() / 2) / rdmGame.PPM);

            body = world.createBody(bodyDef);

            hitbox.setAsBox(rectangle.getWidth() / 2 / rdmGame.PPM, rectangle.getHeight() / 2 / rdmGame.PPM);
            fixtureDef.shape = hitbox;
            body.createFixture(fixtureDef);

        }

        // Red Wall Collision
        for(MapObject object : map.getLayers().get(3).getObjects().getByType(RectangleMapObject.class)) {
            Rectangle rectangle = ((RectangleMapObject) object).getRectangle();

            bodyDef.type = BodyDef.BodyType.StaticBody;
            bodyDef.position.set((rectangle.getX() + rectangle.getWidth() / 2) / rdmGame.PPM, (rectangle.getY() + rectangle.getHeight() / 2)  / rdmGame.PPM);

            body = world.createBody(bodyDef);

            hitbox.setAsBox(rectangle.getWidth() / 2 / rdmGame.PPM, rectangle.getHeight() / 2 / rdmGame.PPM);
            fixtureDef.shape = hitbox;
            body.createFixture(fixtureDef);
        }



        //TouchPad

        touchpadSkin = new Skin();
        touchpadSkin.add("touchBackground", new Texture("touchBackground2.png"));
        touchpadSkin.add("touchKnob", new Texture("touch_circle2.png"));
        touchpadStyle = new Touchpad.TouchpadStyle();
        touchBackground = touchpadSkin.getDrawable("touchBackground");
        touchKnob = touchpadSkin.getDrawable("touchKnob");
        touchpadStyle.background = touchBackground;
        touchpadStyle.knob = touchKnob;

        touchpad = new Touchpad(10, touchpadStyle);
        touchpad.setBounds(8, 8, 64, 64);
        touchpad.scaleBy(1 / rdmGame.PPM,1 / rdmGame.PPM);

        stage.addActor(table);
        stage.addActor(touchpad);

        touchpad.setVisible(touchPadVisibility);



    }
    @Override
    public void show() {

    }

    public void update(float dt) {

       // System.out.println("Char: " + character.b2Body.getPosition());
       // System.out.println("Touch: " + touchpad.);

        speedLabel.setText(String.format("%03d", character.SPEED));
        speedLabel.setVisible(speedLabelVisibility);

        handeInput(dt);
        world.step(1/60f, 6, 6);
        cam.update();
        renderer.setView(cam);


    }

    @Override
    public void render(float delta) {

        update(delta);
        Gdx.gl.glClearColor(255 ,165, 0, 0);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
        stage.draw();
        renderer.render();
        b2dr.render(world, cam.combined);

        //Batch
        game.batch.setProjectionMatrix(cam.combined);
        game.batch.begin();



        game.batch.end();
        stage.act(Gdx.graphics.getDeltaTime());
        stage.draw();


    }

    public void handeInput(float dt){

        if(Gdx.input.isKeyJustPressed(Input.Keys.ESCAPE)){
            game.setScreen(new MenuScreen(game));
        }

        if(Gdx.input.isKeyJustPressed(Input.Keys.UP)){

        }

        if(Gdx.input.isKeyJustPressed(Input.Keys.DOWN))

        if(Gdx.input.isKeyJustPressed(Input.Keys.F3)){

            speedLabelVisibility = !speedLabelVisibility;
        }

        if(touchpad.getKnobPercentX() == 0 && touchpad.getKnobPercentY() == 0) {
            character.b2Body.setLinearVelocity(new Vector2(0, 0));
        } else {
            character.b2Body.setLinearVelocity(new Vector2(character.b2Body.getLinearVelocity().x + touchpad.getKnobPercentX()*character.SPEED, character.b2Body.getLinearVelocity().y + touchpad.getKnobPercentY()*character.SPEED));
        }

    }

    @Override
    public void resize(int width, int height) {

        stretchport.update(width, height);

    }

    @Override
    public void pause() {

    }

    @Override
    public void resume() {

    }

    @Override
    public void hide() {

    }

    @Override
    public void dispose() {
        stage.dispose();
    }


}

Answer 1

我建议你使用两个不同的视口。一个用于主舞台除以PPM，一个用于具有正常分辨率的UI。

Answer 2

您的触控板上没有使用ppm。 Ppm只是物理世界中每米的像素。 Ppm与Gui无关。您仍然使用Gui的屏幕坐标和大小。因此，使用px / ppm大小的摄像机和视口为游戏项目使用主舞台，然后为Gui使用另一个舞台。