这是惟一一种能被用与可边形物体的法线贴图类型，例如被蒙皮和绑定骨骼的角色。

This is the only type of normal mapping that you can use on deformable objects such as skinned or boned characters.

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蒙皮过程包括在你的网格中绑定顶点到骨骼，还有直接指定(硬绑定)或者混合多块骨骼的影响(软绑定)。

Skinning involves binding vertices in your mesh to bones, either directly (rigid bind) or with blended influence to a number of bones (soft bind).

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