Normal vectors are vectors perpendicular to the face of each triangle that defines a mesh.

法向量是与构成网状结构的所有三角形表面都垂直的向量。

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This paper introduces a method for calculating the contact point, contact normal and penetration depth in collision detection of irregular objects expressed by triangle mesh.

介绍了一种针对用三角形网面表示的不规则物体的碰撞检测中接触点，接触法线和刺穿深度的计算方法。

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Objective: to study the finger ridge count and t triangle of 300 normal people of Bai Nationality, and to provide normal parameters for medicine, genetics and anthropology.

目的：研究300名正常白族人指嵴纹数和t三叉，为医学、遗传学、人类学提供正常参数。

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