[SCRIPT] Question about parameters

[Zokrar]

I'm relatively uneducated when it comes to programming in general, so if possible, please try to explain simply.

My question is, why do callback functions require parameters? Such as...

Code: (Select All)

void RandomFunc(string &in asParent, string &in asChild, int alState)

For example, if I have the following script:

Code: (Select All)

AddEntityCollideCallback("Player", "AreaDoor", "EventDoor", true, 1);

void EventDoor(string &in asParent, string &in asChild, int alState)
{
    
    AddDebugMessage("Player collided with AreaDoor. Starting door scare.", false);
    SetSwingDoorClosed("Door", false, false);
    SetSwingDoorDisableAutoClose("Door", true);

    PlaySoundAtEntity("creak", "joint_door_move_special.snt", "Door", 1, false);

    AddTimer("", 2, "TimerStopSound");
    AddTimer("Door", 0, "TimerMoveDoor");
    
}

Why were the parameters required in the EventDoor function? I didn't reference them in the brackets.