Time for action – drawing the track

To draw the track for Mars Runner, perform the following steps:

1. 1. Add the Draw region and its two methods to the MarsTrack class as follows:

   #region Draw
   public void Draw(Camera camera, BasicEffect effect, float offset)
   {
       effect.View = camera.View;
       effect.Projection = camera.Projection;
       effect.TextureEnabled = true;
       effect.Texture = marsTexture;
       effect.EnableDefaultLighting();
   
       float drawBase = 60f;
       drawBase += offset % 30f;
       int firstSector = (int)(offset / 30f);
   
       for (int x = 0; x < 5; x++)
       {
           if (firstSector + x >= 0 && firstSector + x < track.Length)
           {
               DrawTerrainMeshInstance(
                   track[firstSector + x], 
                   effect, 
                   drawBase - (x * 30f));
           }
       }
   }
   
   private void DrawTerrainMeshInstance(
       int meshIndex, 
       BasicEffect effect, 
       float horizontalOffset)
   {
       effect.World = Matrix.Identity * 
           Matrix.CreateTranslation...