1.       public override void Update(GameTime gameTime)
  2.         {
  3.  
  4.             //cameraPosition = Vector3.Transform(cameraPosition, Matrix.CreateRotationY(0.01f)) + target;
  5.             // Move forward/backward
  6.             if (Keyboard.GetState().IsKeyDown(Keys.A))
  7.                 cameraPosition = Vector3.Transform(cameraPosition, Matrix.CreateRotationY(-0.01f)) ;
  8.  
  9.             if (Keyboard.GetState().IsKeyDown(Keys.D))
  10.                 cameraPosition = Vector3.Transform(cameraPosition, Matrix.CreateRotationY(0.01f)) ;
  11.  
  12.             if (Keyboard.GetState().IsKeyDown(Keys.W))
  13.                 cameraPosition = Vector3.Transform(cameraPosition, Matrix.CreateRotationX(-0.01f)) ;
  14.  
  15.             if (Keyboard.GetState().IsKeyDown(Keys.S))
  16.                 cameraPosition = Vector3.Transform(cameraPosition, Matrix.CreateRotationX(0.01f)) ;
  17.  
  18.            // if(Keyboard.GetState().IsKeyDown(Keys.F));
  19.              //   cameraPosition = Matrix.CreateTranslation(-20.0f / 3.0f, -10.0f / 3.0f, 0) * Matrix.CreateFromAxisAngle(rotAxis, 0.01f);
  20.  
  21.  
  22.  
  23.             CreateLookAt();
  24.  
  25.             base.Update(gameTime);
  26.         }
  27.  
  28.         private void CreateLookAt()
  29.         {
  30.  
  31.             view = Matrix.CreateLookAt(cameraPosition, target, Vector3.Up);
  32.         }