在基于触摸输入的Libgdx中使用力来移动物体

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.InputProcessor;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.math.Vector2;

public class MyGame extends ApplicationAdapter implements InputProcessor {
    private SpriteBatch batch;
    private Texture objectTexture;
    private Vector2 objectPosition;
    private Vector2 touchPosition;
    private Vector2 force;

    private OrthographicCamera camera;

    @Override
    public void create() {
        batch = new SpriteBatch();
        objectTexture = new Texture("object.png");
        objectPosition = new Vector2(Gdx.graphics.getWidth() / 2, Gdx.graphics.getHeight() / 2);
        touchPosition = new Vector2();
        force = new Vector2();

        camera = new OrthographicCamera(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
        camera.setToOrtho(false);
        Gdx.input.setInputProcessor(this);
    }

    @Override
    public void render() {
        Gdx.gl.glClearColor(1, 1, 1, 1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        batch.setProjectionMatrix(camera.combined);
        batch.begin();
        batch.draw(objectTexture, objectPosition.x - objectTexture.getWidth() / 2, objectPosition.y - objectTexture.getHeight() / 2);
        batch.end();

        // 应用力到物体上
        objectPosition.add(force);
    }

    @Override
    public boolean touchDown(int screenX, int screenY, int pointer, int button) {
        touchPosition.set(screenX, screenY);
        return true;
    }

    @Override
    public boolean touchDragged(int screenX, int screenY, int pointer) {
        touchPosition.set(screenX, screenY);
        // 计算力的方向
        force.set(touchPosition).sub(objectPosition).nor();
        // 计算力的大小
        float distance = touchPosition.dst(objectPosition);
        force.scl(distance * 0.1f); // 根据需要进行缩放

        return true;
    }

    @Override
    public boolean touchUp(int screenX, int screenY, int pointer, int button) {
        force.set(0, 0); // 清空力
        return true;
    }

    // 其他InputProcessor接口方法的实现...

    @Override
    public void dispose() {
        batch.dispose();
        objectTexture.dispose();
    }
}