java - Box2D 形状未渲染

Question

我一直在查看其他一些线程，尽管我尝试了所有方法，但我在 box2d 中创建的形状并未渲染。很奇怪，希望大家能提供解决方案。

public class worldRender {
fighterGame game;
PlayScreen renderGame;
private Viewport gamePort = new StretchViewport(1020 / game.PPM,760 / game.PPM);
World world = new World(new Vector2(0,-10), true);
Box2DDebugRenderer b2dr = new Box2DDebugRenderer();
private OrthographicCamera gameCam = new OrthographicCamera();
BodyDef bDef = new BodyDef();
public Body b2body;
FixtureDef fixtureDef = new FixtureDef();
ShapeRenderer shapeRender;


public worldRender() {

    gameCam = new OrthographicCamera(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
    gameCam.position.set(1020/2, 760/2, 0);


}

public worldRender(float dt) {

    gameCam.update();
    world.step(1/60f, 6, 2);


    b2dr.render(world, gameCam.combined);
    bodyRender();

}
public void bodyRender() {

    BodyDef bdef = new BodyDef();
    bdef.position.set(0.0f / game.PPM,4.0f / game.PPM);
    bdef.type = BodyDef.BodyType.DynamicBody;
    b2body = world.createBody(bdef);
    FixtureDef fdef = new FixtureDef();
    fdef.friction = 0.25f;
    CircleShape shape = new CircleShape();
    shape.setRadius(5);
    fdef.shape = shape;
    fdef.density = 1.0f;
    b2body.createFixture(fdef);


}

}

Answer 1

我将列出一些解决方案，因为代码片段中并非所有内容都清楚:

1. 您确定 worldRender() 方法正在运行吗
   • 如果您使用 Game 和 Screen，请确保您的游戏 render() 方法调用 super()，否则您的 Screen render() 方法将不会运行；
2. 如前所述，PPM 的值是否正确/它是什么？

这是否绘制:

// First we create a body definition
BodyDef bodyDef = new BodyDef();
bodyDef.type = BodyType.StaticBody;

// Set our body's starting position in the world
bodyDef.position.set(50, 50);

// Create our body in the world using our body definition
Body body = world.createBody(bodyDef);

// Create a circle shape and set its radius to 6
CircleShape circle = new CircleShape();
circle.setRadius(10f);

// Create a fixture definition to apply our shape to
FixtureDef fixtureDef = new FixtureDef();
fixtureDef.shape = circle;

// Create our fixture and attach it to the body
Fixture fixture = body.createFixture(fixtureDef);

// Remember to dispose of any shapes after you're done with them!
// BodyDef and FixtureDef don't need disposing, but shapes do.
circle.dispose();

这应该在 x=10,y=10 处绘制一个半径为 10 的圆(确保这些点位于您的视口(viewport)中。