Översikt

Detta exempel visar hur man animerar och översätter från logiska till visuella koordinater

Kod

Box.cs

    class Box
    {
        float m_speedX = 1.0f;

        internal void Update(Microsoft.Xna.Framework.GameTime gameTime)
        {
            float elapsedTime = (float)gameTime.ElapsedGameTime.TotalSeconds;

            m_x += elapsedTime * m_speedX;

            if (m_x > 1.0f)
            {
                m_x -= 1.0f;
            }
        }

        public float m_x = 0.0f;
        public float m_y = 0.5f;
    }

Game1.cs

...
      BoxView m_boxView;
      Box     m_box = new Box();

      protected override void Update(GameTime gameTime)
      {
            // Allows the game to exit
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();

            m_box.Update(gameTime);
            // TODO: Add your update logic here

            base.Update(gameTime);
      }

      protected override void Draw(GameTime gameTime)
      {
            GraphicsDevice.Clear(Color.CornflowerBlue);

            m_boxView.drawBox(m_box);

            base.Draw(gameTime);
      }
...

BoxView.cs

...

class BoxView
    {

        private SpriteBatch m_spriteBatch;
        private Texture2D m_boxTexture;

        private int m_windowWidth;
        private int m_windowHeight;

        public BoxView(GraphicsDevice graphicsDevice, ContentManager content)
        {
            m_windowWidth = graphicsDevice.Viewport.Width;
            m_windowHeight = graphicsDevice.Viewport.Height;
            m_spriteBatch = new SpriteBatch(graphicsDevice);

            m_boxTexture = content.Load<Texture2D>("bubbles");

        }


        internal void drawBox(Box box)
        {

            int vx = (int)(box.m_x * m_windowWidth);
            int vy = (int)(box.m_y * m_windowHeight);

            Rectangle destrect = new Rectangle(vx-15, vy-15, 30, 30);

            m_spriteBatch.Begin();
            m_spriteBatch.Draw(m_boxTexture, destrect, Color.White);
            m_spriteBatch.End();
        }


    }