Fancy door + quest scripting.

[Nye]

As for your first problem, regarding the callback being removed upon being run, when you declare the callback, for example:

Code: (Select All)

AddEntityCollideCallback("Player", "needlantern", "lantern_warn", true, 1);

The boolean expression, 'true' in the above case is the answer to "Delete on collide?". Changing this to false will stop it deleting on collide. So, in your case, to allow the player to use the key more than once. I always find the 'Script Functions' page on the Wiki is handy

http://wiki.frictionalgames.com/hpl2/amn..._functions

So, if we use an entity collide callback, the syntax is

Code: (Select All)

AddEntityCollideCallback(string& asParentName, string& asChildName, string& asFunction, bool abDeleteOnCollide, int alStates);

If we wanted to allow two entities to collide and run the associated procedure more than once, we would change the boolean value 'bool abDeleteOnCollide' to false.

Regarding the key on the door, the syntax and your syntax for the using key on door callback is:

Code: (Select All)

AddUseItemCallback(string& asName, string& asItem, string& asEntity, string& asFunction, bool abAutoDestroy);

Notice the 'boola abAutoDestroy'. We want this to be false, so that it doesn't remove the key each time. It's a little more complicated with items, since, you will then need to add another local variant check, when you run the procedure. For example:

Code: (Select All)

void OnStart()
{
    AddUseItemCallback("", "shop_key", "cellar_wood01", "UsedKeyOnDoor", false);
}

void  UsedKeyOnDoor(string &in asItem, string &in asEntity)
{
    if (GetLocalVarInt("FireLit") != 1)
    {
        SetMessage("woodshop", "HandsTooCold", 0);
    }
      if (GetLocalVarInt("FireLit") == 1)
    {
          RemoveItem("shop_key");
          GiveSanityBoost();
          SetSwingDoorLocked("cellar_wood01", false, true);
          PlaySoundAtEntity.... etc etc
    }
}

Also, you can use an 'else' statement, to make it a bit quicker, as Pandemoneus says, but I find it is easier to understand what you were doing, using just if statements where possible.
--------------------------------------------------------------------
With your second script, try ensuring that you have

Code: (Select All)

void OnLeave()
{

}

AND

Code: (Select All)

void OnEnter()
{


}

in your script file somewhere, else it wont run.