home/ang/slambook2/ch3/examples/plotTrajectory.cpp:43：对‘glEnable’未定义的引用

回答: 这个报错是因为在编译程序时，找不到对应的定义。具体来说，报错指向了`home/ang/slambook2/ch3/examples/plotTrajectory.cpp`文件的第43行，指出对`glEnable`的引用未定义。\[3\]要解决这个问题，你需要确保在编译程序之前，正确地包含了相关的头文件，并且链接了对应的库文件。此外，还需要检查代码中是否有任何拼写错误或语法错误。如果问题仍然存在，你可以尝试查看相关的编译器文档或寻求更多的帮助。
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