(SOLVED)Global object gives null pointer error.

[FanOfHumor]

I have a problem with a global object giving the null pointer error.Ive used global objects before so i'm thinking it might be the way i'm using it.Maybe I did something wrong with On_Event."a" is the global object.This happens for anything having to do with the object "a".

Code: ags

function on_event(EventType event, int data)
{
  int geargraphic = Random(5);
  if(event == eEventEnterRoomBeforeFadein)
  {
    
    if(geargraphic==0)
    {
      a.Graphic=13;
    }
    if(geargraphic==1)
    {
      a.Graphic=8;
    }
    if(geargraphic==2)
    {
      a.Graphic=7;
    }  
    if(geargraphic==3)
    {
      a.Graphic=9;
    }
    if(geargraphic==4)
    {
      a.Graphic=10;
    }
    if(geargraphic==5)
    {
      a.Graphic=12;
    }
    a.X=200;
    a.Y=200;
  }
} 

[Khris]

Your  a  is a global Object pointer, currently pointing at nothing. You need to first make sure you're in the proper room:

Code: ags

   if(event == eEventEnterRoomBeforeFadein && data == 3)  // only in room 3

Next you need to do

Code: ags

  a = object[2]; // use actual object id from the editor

Now you can use  a.

[FanOfHumor]

Ok,but this needs to be for every room.How do I do that?

[Khris]

Just use your original if condition.
In the case of event being eEventEnterRoomBeforeFadein, the  data  param contains the room number, so just don't add that test to the condition.

What's causing the error is a being null because you never pointed it at an actual object. That's what you need to fix, and

Code: ags

  a = object[2];

is what does that. Provided that the object in question is object #2 in every room, that is.

[FanOfHumor]

Alright then. Thanks.