Time for action – the Game1 Update method

  1. Replace the current Update() method in the Game1 class with the following:
    protected override void Update(GameTime gameTime)
{
    Camera.Position = new Vector2(hscroll.Value, vscroll.Value);

    MouseState ms = Mouse.GetState();

    if ((ms.X > 0) && (ms.Y > 0) &&
        (ms.X < Camera.ViewPortWidth) &&
        (ms.Y < Camera.ViewPortHeight))
    {
        Vector2 mouseLoc = Camera.ScreenToWorld(
            new Vector2(ms.X, ms.Y));
 if (Camera.WorldRectangle.Contains( (int)mouseLoc.X, (int)mouseLoc.Y)) { if (ms.LeftButton == ButtonState.Pressed) { TileMap.SetTileAtCell( TileMap.GetCellByPixelX((int)mouseLoc.X), TileMap.GetCellByPixelY((int)mouseLoc.Y), DrawLayer, DrawTile); } if ((ms.RightButton == ButtonState.Pressed) && (lastMouseState.RightButton ...

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