Unit 5 grasping, questions regarding cpp

[Lzy]

These are realtive unisiginificant questions, but i’m really concerned abt that

1.in line 42, why we can use the msg moveit_msgs::GripperTranslation to define a function, i think it’s never included or import before.

2.in line 119,why we can directly use the function makeGraspPosture(), i’m pretty sure it’s never defined before, the only rational explanation i figure out is that the source file include it’ s own header file, but i’m still confused abt how evertything works.

Any help is really appreciated.

[211077255_Sanele_Mhlongo]

they are both not defined on the header file and the system cant identify them as built in function

[Lzy]

yes they’re not defined,
but the code is provided by the course, i think it should work