opengl3D绘图，包含各种三维图形的绘制，以及茶壶和长方体的纹理映射和环境映射，外加贝塞尔曲面和Nurbs曲面绘制-opengl3D drawing, includes a variety of 3D graphics rendering, as well as teapots and rectangular texture mapping and environment mapping, external Jiabeisaier surface and surface rendering