TANGENT_SPACE_ROTATION 宏 相当于嵌入如下两行代码： float3 binormal = cross( v.normal, v.tangent.xyz ) * v.tangent.w; float3x3 rotation = float3x3( v.tangent.xyz, binormal, v.normal ); 也就是构造出 tangent space 的坐标系，

文章作者：里海 来源网站：https://blog.csdn.net/WangPaiFeiXingYuan UF_CURVE_create_arc_tangent_point_tangent Defined in: uf_curve.h int UF_CURVE_create_arc_tangent_point_tangent(tag_t tangent_object1, tag_t poin

C. The tangent spaces and the Lie algebra Given X (t) a point moving on a Lie group’s manifold M, its velocity X ‾ \overline{X} X = ∂X /∂t belongs to the space tangent to M at X (Fig. 2), which we n