public void AddVertex(Vector3 position, Nine.Imaging.Color color, Vector2 uv)
 => this.AddVertex(position, new Vector4(color.R / 255, color.G / 255, color.B / 255, 1.0f), uv);
 public void AddVertex(Vector3 position, Nine.Imaging.Color color)
 => this.AddVertex(position, color, Vector2.Zero);