Normals determine whether a given triangle face is lit.
法线会判断指定的三角形表面是否会被照亮。
For a triangle in a given 3-d mesh, the order in which the triangle's vertex positions are specified determines whether the triangle face is a front or back face.
如果是指定的3 - d网状结构中的三角形，三角形顶点位置的指定顺序会决定三角形表面是正对面或背对面。
Each face is an equilateral triangle and three faces meet at each vertex.
每一个面是正三角形并且于每一个顶点处有三个面相交。
If you have a triangle shaped face, this means that you have a pointy chin.
如果你有一张三角型的脸，这意味着你有一个尖下巴。
The thesis uses the method to train face feature classifier, to get the face feature points and build face feature triangle that uses eyes and mouth as vertexes.
本文采用该算法训练人脸面部特征检测器，提取区域的几何中心进行面部特征点定位，获取以双眼和嘴巴为特征顶点的人脸特征三角形。
The winding order (the order in which the Positions that make up each triangle of the mesh are specified) determines whether a given face is front-facing or back-facing.
弯曲顺序 （即指定组成网状每个三角形之位置的顺序） 会决定表面为正对面或背对面。
Also this article puts forward the data structure of point, triangle, side face and tri-prism and builds some topology.
提出了三棱柱的体元构造，详细设计了点、三角形、侧面和三棱柱体的数据结构，建立了一定的拓扑关系。
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。
Assign face scope at triangle coal seams, make use of engineering mathematics, optimize face designs to mine coals to the maximum.
在煤层三角形区域内布置回采工作面，利用工程数学，优化工作面设计，最大限度地回采煤炭。
The double-face reflex reflection bodies comprise three double-face reflex reflection bodies which can form a triangle.
在上述三角形左右二边的双面回复反射体的承托板上端设有连接件；
The double-face reflex reflection bodies comprise three double-face reflex reflection bodies which can form a triangle.
在上述三角形左右二边的双面回复反射体的承托板上端设有连接件；
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