public void Draw(IDrawContext context)
        {
            var    drawSys = DrawSystem.GetInstance();
            Matrix layout  = m_initParam.Layout;

            foreach (char c in m_text)
            {
                var   tex    = DrawSystem.TextureData.Null();
                float offset = 0.0f;
                switch (c)
                {
                case '.':
                    tex    = m_initParam.Dot;
                    offset = -0.22f;
                    break;

                default:
                    if ('0' <= c && c <= '9')
                    {
                        int num = (int)c - (int)'0';
                        tex    = m_initParam.Numbers[num];
                        offset = -0.3f;
                    }
                    break;
                }

                Debug.Assert(tex.Resource != null, "invalid character");
                context.DrawModel(layout * m_worldTrans, Color4.White, m_plane.NodeList[0].Mesh, StandardMaterial.Create(tex), DrawSystem.RenderMode.Transparency, null);
                layout *= Matrix.Translation(offset, 0, 0);
            }
        }