Export the mesh with the skeleton hierarchy, normals, textures and animation.

导出带骨架层级的网格，法线，纹理和动画。

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We subdivide very single planar triangle independently, and finally get a smooth surface interpolating the vertices of the original triangle mesh and their normals.

通过对单个平面三角片的单独细分，最后我们得到一张插值原三角网格顶点和顶点法向的光滑曲面。

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Vertex positions (may include normals also) for all the vertices in the mesh for all the animation frames are stored in memory.

动画帧所有网格顶点包含着顶点的位置(可能包括法线)其全部储存在内存中。

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