C++ 如何在可变大小的向量上使用叉积
我使用的是C++ 如何在可变大小的向量上使用叉积,c++,eigen,C++,Eigen,我使用的是Eigen::VectorXf,我想用这两个向量的两部分来计算叉积。例如: Eigen::VectorXf vect_1 (6), vect_2 (6), vect_3 (6); // Put some values into the vectors vect_3 = vect_1.cross(vect_2); // Doesn't work because vector size != 3 // Would work with Eigen::Vector3f 我想使用最后3个坐标计
Eigen::VectorXf
,我想用这两个向量的两部分来计算叉积。例如:
Eigen::VectorXf vect_1 (6), vect_2 (6), vect_3 (6);
// Put some values into the vectors
vect_3 = vect_1.cross(vect_2); // Doesn't work because vector size != 3
// Would work with Eigen::Vector3f
我想使用最后3个坐标计算叉积,并将其存储到vect_3
比如:
vect_3(size = 3, offset = 3) = ...
我该怎么做
Eigen::Vector3f vect1,vect2;
vect1 = vect_1.segment(3,3);
vect2 = vect_2.segment(3,3);
vect_3.segment(3,3) = vect1.cross(vect2);