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C#-Quelltext

public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
        World world;
        Body playerrect;
        Texture2D playerSprite, coinSprite;
        public List<Coins> MuenzenListe = new List<Coins>();

        private static float _displayUnitsToSimUnitsRatio = 100f;

        public static Vector2 ToDisplayUnits(Vector2 simUnits)
        {
            return simUnits * _displayUnitsToSimUnitsRatio;
        }

        private bool isOnGround;

        bool Player_OnCollision(Fixture fixtureA, Fixture fixtureB, FarseerPhysics.Dynamics.Contacts.Contact contact)
        {
    //        if (fixtureB.CollisionCategories == Category.Cat5)
            {
        //          isOnGround = true;
            }
        return true;
        }

        void Player_OnSeparation(Fixture fixtureA, Fixture fixtureB)
        {
            if (fixtureB.CollisionCategories == Category.Cat5)
            {
                isOnGround = false;
            }
        }

        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
        }

        protected override void Initialize()
        {
            base.Initialize();
        }

        protected override void LoadContent()
        {
            spriteBatch = new SpriteBatch(GraphicsDevice);
            playerSprite = Content.Load<Texture2D>("retromario");
            coinSprite = Content.Load<Texture2D>("mariocoin");

            if (world == null)
            {
                world = new World(new Vector2(0, 2));
            }
            else
            {
                world.Clear();
            }

            playerrect = BodyFactory.CreateRectangle(world, 0.64f, 0.64f, 1.0f);
            playerrect.BodyType = BodyType.Dynamic;
            playerrect.Position = new Vector2(0.22f, 0f);
            playerrect.CollisionCategories = Category.Cat15;
            playerrect.FixedRotation = true;

            playerrect.OnCollision += Player_OnCollision;
            playerrect.OnSeparation += Player_OnSeparation;

            MuenzenListe.Add(new Coins(world, BodyFactory.CreateRectangle(world, 0.64f, 0.64f, 1.0f), BodyType.Static, true, new Vector2(1.60f, 4.16f), 0, false, playerrect));
        }

        protected override void Update(GameTime gameTime)
        {
            float elapsed = (float)gameTime.ElapsedGameTime.TotalSeconds;
            world.Step(Math.Min(elapsed, (1f / 60f)));
            for (int i = 0; i <= MuenzenListe.Count -1; i++)
            {
                if (MuenzenListe[i].Remove == true)
                    MuenzenListe.Remove(MuenzenListe[i]);
            }
            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.CornflowerBlue);
            spriteBatch.Begin();
            for (int i = 0; i <= MuenzenListe.Count -1; i++)
                {
                    MuenzenListe[i].Draw(spriteBatch,coinSprite);
                }
            spriteBatch.Draw(playerSprite, ConvertUnits.ToDisplayUnits(playerrect.Position), null, Color.White, playerrect.Rotation, new Vector2(playerSprite.Width / 2.0f, playerSprite.Height / 2.0f), 1f, SpriteEffects.None, 0f);
           spriteBatch.End();

            base.Draw(gameTime);
        }
    }

C#-Quelltext

public class Coins
    {
       Body Muenze;
       BodyType Muenzetype;
       Vector2 Muenzeposition;
       float Muenzerotation;
       public bool Remove;
       World world1;
       Body playerrect;

       public Coins(World world,Body muenze, BodyType muenzetype, bool muenzesensor, Vector2 muenzeposition, float muenzerotation, bool remove, Body playerr)
       {
         playerrect = playerr;
         world1 = world;
         this.Muenze = muenze;
         this.Muenzetype = muenzetype;
         this.Muenze.IsSensor = muenzesensor;
         this.Muenzeposition = muenzeposition;
         this.Muenzerotation = muenzerotation;
         this.Remove = remove;
         Muenze.OnCollision += Muenze_OnCollision;
       }

         bool Muenze_OnCollision(Fixture fixtureA, Fixture fixtureB, FarseerPhysics.Dynamics.Contacts.Contact contact)
        {
           if (fixtureB.CollisionCategories == Category.Cat15)
            {
                world1.RemoveBody(fixtureA.Body);
                Remove = true;
            }
            return true;
        }

        public void Draw(SpriteBatch batch, Texture2D coinSprite)
        {
            if (Remove == false)
            {
              batch.Draw(coinSprite, ConvertUnits.ToDisplayUnits(Muenzeposition), null, Color.White, Muenzerotation, new Vector2(coinSprite.Width / 2.0f, coinSprite.Height / 2.0f), 1f, SpriteEffects.None, 0f);
            }
        }
   }