Question

Hay alguna manera de minimizar el codigo y no repetir el mismo codigo todo el rato.
Si quiero poner un Sprite estatico, tengo que repetir el codigo todo el rato?

private void crearPiso() {

        BodyDef cuerpo = new BodyDef();
        cuerpo.type = BodyDef.BodyType.StaticBody;
        cuerpo.position.set(0,0);

        pisoCuerpo = this.game.mundo.createBody(cuerpo); 

        PolygonShape forma = new PolygonShape(); 

        forma.setAsBox(Gdx.graphics.getWidth(),20);

        FixtureDef fixtureDef = new FixtureDef();
        fixtureDef.shape = forma;
        fixtureDef.density = 1f;

        pisoCuerpo.createFixture(fixtureDef); 

        forma.dispose();

        }

        public void draw(SpriteBatch Batcher){

            piso.draw(Batcher);

Answer 1

tienes opciones, implementar una clase que herede ese código o crear una clase para administrar los cuerpos.

intenta creando una nueva clase:

public class BodyManager
{
    private final static float PX_TO_METERS = 80.f;
    public static BodyDef.BodyType DYNAMIC_BODY = BodyDef.BodyType.DynamicBody;
    public static BodyDef.BodyType STATIC_BODY = BodyDef.BodyType.StaticBody;

    public Body createBody(World world, BodyProperties properties)
    {
        BodyDef cuerpo = new BodyDef();
        cuerpo.type = BodyDef.BodyType.DynamicBody;
        cuerpo.position.set(properties.getPosition().x, properties.getPosition().y);
        cuerpo.fixedRotation = true;

        Body body = world.createBody(cuerpo);

        PolygonShape forma = new PolygonShape();
        forma.setAsBox(
        properties.getSize().y / 2 / PX_TO_METERS,
        properties.getSize().x / 2 / PX_TO_METERS);

        FixtureDef fixtureDef = new FixtureDef();
        fixtureDef.shape = forma;
        fixtureDef.density = 1f;

        body.createFixture(fixtureDef);

        forma.dispose();

        return body;
    }

    public static class BodyProperties{
        private BodyDef.BodyType type;
        private Vector2 position;
        private Vector2 size;

        public BodyProperties BodyProperties(Sprite sprite, BodyDef.BodyType type){

            setPosition(new Vector2(sprite.getX(), sprite.getY()));
            setSize(new Vector2(sprite.getWidth(), sprite.getHeight()));
            setType(type);

            return this;
        }

        public BodyProperties BodyProperties()
        {
            position = new Vector2(0, 0);
            size = new Vector2(0, 0);
            type = STATIC_BODY;

            return this;
        }

        public BodyProperties setType(BodyDef.BodyType type) { this.type = type; return this; }
        public BodyProperties setPosition(Vector2 position) { this.position = position; return this; }
        public BodyProperties setSize(Vector2 size) { this.size = size; return this; }

        public BodyDef.BodyType getType(){ return type; }
        public Vector2 getPosition(){ return position; }
        public Vector2 getSize(){ return size; }
    }
}

---

Con esta clase puedes crear nuevos cuerpos agregando sus propiedades.

// creamos el sprite
Sprite jugador = new Sprite(new Texture(Gdx.files.internal("jugador.png")));
jugador.setPosition(50, 50);

// creamos la instancia de BodyManager
BodyManager bodymanager = new BodyManager();

// creamos el cuerpo estatico en el mundo
Body cuerpoJugador = bodymanager.createBody(
    mundo,
    new BodyManager.BodyProperties()
            .BodyProperties(jugador, BodyManager.STATIC_BODY)
);