C#

   partial class ModelViewerControl : GraphicsDeviceControl
    {
protected override void Draw()
        {
            // Clear to the default control background color.
            Color backColor = new Color(BackColor.R, BackColor.G, BackColor.B);

            GraphicsDevice.Clear(backColor);

            if (model != null)
            {
                // Compute camera matrices.
                float rotation = (float)timer.Elapsed.TotalSeconds;

                Vector3 eyePosition = modelCenter;

                eyePosition.Z += modelRadius * 2;
                eyePosition.Y += modelRadius;

                float aspectRatio = GraphicsDevice.Viewport.AspectRatio;

                float nearClip = modelRadius / 100;
                float farClip = modelRadius * 100;
                
                // Matrix world = Matrix.CreateRotationY(rotation);
                Matrix world = Matrix.CreateFromYawPitchRoll((float)0, (float)rotation, (float)rotation);

                Matrix view = Matrix.CreateLookAt(eyePosition, modelCenter, Vector3.Up);
                Matrix projection = Matrix.CreatePerspectiveFieldOfView(1, aspectRatio, nearClip, farClip);

                // Draw the model.
                foreach (ModelMesh mesh in model.Meshes)
                {
                    foreach (BasicEffect effect in mesh.Effects)
                    {
                        //effect.World = boneTransforms[mesh.ParentBone.Index] * worldX;
                        effect.World = boneTransforms[mesh.ParentBone.Index] * world;
                        
                        // effect.World = boneTransforms[mesh.ParentBone.Index] * worldZ;
                        //effect.World = Matrix.CreateFromYawPitchRoll(yaw, pitch, roll);
                        effect.View = view;
                        effect.Projection = projection;

                        effect.EnableDefaultLighting();
                        effect.PreferPerPixelLighting = true;
                        effect.SpecularPower = 16;
                    }

                    mesh.Draw();
                }
            }
        }
}

private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            switch (comport.ReadChar())
            {
                case 'B':
                    byte[] angle;
                    angle = new byte[2];
                    comport.Read(angle, 0, 2);
                    break;
            }
        }