vslame 14讲学习 1 ----sophus安装

在学习14讲的时候第4讲安装sophus函数，使用书籍自带的3rd party的时候有错误
error: lvalue required as left operand of assignment 网上搜索碰到了靠谱的答案：

/home/xxx/Documents/vslam/slambook/slambook/3rdparty/Sophus/sophus/so2.cpp: In constructor ‘Sophus::SO2::SO2()’:
/home/xxx/Documents/vslam/slambook/slambook/3rdparty/Sophus/sophus/so2.cpp:32:26:
error: lvalue required as left operand of assignment
   unit_complex_.real() = 1.;
                          ^~
/home/xxx/Documents/vslam/slambook/slambook/3rdparty/Sophus/sophus/so2.cpp:33:26: 
error: lvalue required as left operand of assignment
   unit_complex_.imag() = 0.;

打开 Sophus/sophus/so2.cpp文件。

将：

 SO2::SO2() 
{ 
 unit_complex_.real() = 1.; 
 unit_complex_.imag() = 0.; 
 }

改成：

 SO2::SO2() 
{ 
   unit_complex_.real(1.); 
   unit_complex_.imag(0.); 
 }

这里主要是一个赋值的问题

原文链接：https://blog.youkuaiyun.com/Robot_Starscream/article/details/88132050