2 replies to this topic

[Karahs]

Hi everybody, I made this little script which emulates the well known operator "instanceof" used in java.
It checks whether the supplied instance id is an instance of the specified object or is a child of it.
It should allow easier type-checking... I couldn't find something like this in forum, so I just wrote it.

Feel free to use it, no credit needed

GMVersion: any(?)
Pro-only? No

/*
    boolean instanceof(instance_id inst, object_index ind)
    
    returns whether inst is an instance of ind
    
    ######################################################
    # PLEASE NOTE: inst must be the *id of an instance,* #
    # ind must be the *index of an object*               #
    ######################################################
    
    by Karahs
*/

var inst, ind, indx;
inst = argument0;
ind = argument1;

indx = inst.object_index;

if(ind == indx) return true;

while(indx > 0){
    indx = object_get_parent(indx);
    if(ind == indx) return true;
}

return false;

[IceMetalPunk]

Um...GM has object_is_ancestor(), which does the same thing as yours, only you'd supply inst.object_index directly to the argument...

-IMP

[Karahs]

Damn, you are right
I knew about that function, I just thought I needed to know if an object is the child of another, not if it is the ancestor...

Moderators, please remove this horror of mine, and sorry for posting unnecessary script...