java - libgdx 中纹理的控制

Question

请帮帮我。我希望当按下屏幕左侧时，模型向左移动，当按下屏幕右侧时，模型向右移动。

输入处理器类

public class InputHandler implements InputProcessor {

private Bird myBird;

//
public InputHandler(Bird bird) {
    // myBird and bird
    myBird = bird;
}

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

@Override
public boolean keyDown(int keycode) {
    return false;
}

@Override
public boolean keyUp(int keycode) {
    return false;
}

@Override
public boolean keyTyped(char character) {
    return false;
}

@Override
public boolean touchUp(int screenX, int screenY, int pointer, int button) {
    return false;
}

@Override
public boolean touchDragged(int screenX, int screenY, int pointer) {
    return false;
}

@Override
public boolean mouseMoved(int screenX, int screenY) {
    return false;
}

@Override
public boolean scrolled(int amount) {
    return false;
}

鸟类

public class Bird {

private Vector2 position;
private Vector2 velocity;
private Vector2 acceleration;

private float rotation; // For handling bird rotation
private int width;
private int height;

public Bird(float x, float y, int width, int height) {
    this.width = width;
    this.height = height;
    position = new Vector2(230, 650);
    velocity = new Vector2(0, 0);
    acceleration = new Vector2(200, 0);
}

public void update(float delta) {

    velocity.add(acceleration.cpy().scl(delta));

    if (velocity.x > 200) {
        velocity.x = 200;
    }

    position.add(velocity.cpy().scl(delta));

    // Turn
    /*if (velocity.y < 0) {
        rotation -= 600 * delta;

        if (rotation < -20) {
            rotation = -20;
        }
    }*/

    /* Turn
    if (isFalling()) {
        rotation += 480 * delta;
        if (rotation > 90) {
            rotation = 90;
        }

    }*/

}

/*public boolean isFalling() {
    return velocity.y > 110;
}*/

public void onClick() {
    velocity.x = -140;
}

public float getX() {
    return position.x;
}

public float getY() {
    return position.y;
}

public float getWidth() {
    return width;
}

public float getHeight() {
    return height;
}

public float getRotation() {
    return rotation;
}

Answer 1

将您的 touchDown 代码更改为此并删除评论标签

public boolean touchDown(int screenX, int screenY, int pointer, int button) {
    if (screenX < WIDTH_OF_SCREEN / 2) {
        myBird.setLeftMove(true);
    } else {
        myBird.setRightMove(true);
    }
    return true;
}

然后将您的 touchUp 代码更改为此

@Override
public boolean touchUp(int screenX, int screenY, int pointer, int button) {
    myBird.setLeftMove(false);
    myBird.setRightMove(false);
    return true;
}

您需要将 WIDTH_OF_SCREEN 替换为您的屏幕宽度。这将做的是检查屏幕被按下的位置，左边小于屏幕的一半，右边大于屏幕的一半。当手指抬起时，它将停止向左和向右移动。