• 1. tangent vector space: 切向量空间
• 2. real tangent vector space: 实切向量空间

• 1.The original texture coordinate and height values are already represented in tangent space, so the eye vector must be as well.
  原始的材质贴图坐标和高度数据已经在切线空间中了，因此视向量最好也能如此。
  dict.yoduao.com
• 2.The eye vector can be created in global coordinates by subtracting a surface position from the eye position and transforming the resulting vector into tangent space.
  视向量能够在全局坐标系中通过视点坐标减去表面坐标来创建，并且要把结果转换到切线空间中。
  dict.yoduao.com
• 3.Then, based on the CR formulation, the internal force vector and tangent stiffness matrix of large rotation and small strain space bar and plane beam element are deduced.
  其次，基于CR列式法推导出了大旋转小应变空间杆单元及平面梁单元的内力矢量及切线刚度矩阵；
  dict.yoduao.com

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