And I am having problem understanding this piece of code. Under GCS_Mavlink...
#if CAMERA == ENABLED
case MAVLINK_MSG_ID_DIGICAM_CONFIGURE:
{
g.camera.configure_msg(msg);
break;
}
case MAVLINK_MSG_ID_DIGICAM_CONTROL:
{
g.camera.control_msg(msg);
break;
} #endif // CAMERA == ENABLED
So for "g.camera.configure_msg(msg);",
the dot operator is for accessing a structure member. So "g" and "camera" is a structure name and "configure_msg(msg)" is a structure member? So I assume there exists a declaration somewhere stating that...
int 50; //or any integer
int msg[n];
struct xxx{
configure_msg(msg);
}
struct yyy{
structure xxx camera;
}
struct yyy g;
But I couldn't find anything like that in the code. Can anyone tell me what exactly does that piece of code do? I have never learned anything about C structure before. I was just looking at tutorial online... Thanks a lot!
"Object-oriented programming (OOP) is a programming paradigm that represents concepts as "objects" that have data fields (attributes that describe the object) and associated procedures known as methods. Objects, which are usually instances of classes, are used to interact with one another to design applications and computer programs.[1] [2]" -- wiki
In c++, for you right now, a struct is basically the same as a class.
/// @class Camera
/// @brief Object managing a Photo or video camera
class AP_Camera {
public:
...
// MAVLink methods
void configure_msg(mavlink_message_t* msg);
void control_msg(mavlink_message_t* msg);
I didn't find "g" or "camera" but there are a lot of files to look through.