Check the value of a variable in a specific instance

Hi there!

After reading a lot of thread about similar problem I still can't figure it out how can I check a value of a specific instance and do an action.

That's my code. It works but it's always goes to Option room and never in Atrio room.

Code:

    

if mouse_check_button_pressed(mb_left) {            
    if position_meeting(mouse_x, mouse_y, menu_select) {
        if (menu_select.menu_selection == 2)
        {
room_goto(option);
        }

        if (menu_select.menu_selection == 1)
        {
room_goto(atrio);
        }
}}

Do you have any idea where I'm wrong? Thanks!

 

Where are you setting the variable menu_selection?

 

Thanks for answer and sorry for non-clear question.
I defined it in "variable definitions" menu of the object. And then I modified the value ("1" and "2") in instances variables.

 

If you've done any real research on this topic, you should have seen at least one place where I responded demanding that the poster read these articles:

• What's the difference: Objects and Instances
• What's the difference: Collision functions

Given the above, it's not difficult to derive this:

Code:

var inst_menu_select = instance_position(mouse_x, mouse_y, menu_select);
if (inst_menu_select != noone) {
  switch (inst_menu_select.menu_selection) {
    case 1:
      room_goto(atrio);
      break;
    case 2:
      room_goto(option);
      break;
  }
}

 

As Frosty has so elegantly stated, you need to let GM know which menu_select object you are referring to. Even though you did a position_meeting, it doesn't know that you are then referring to that one when accessing the menu_selection variable. Only by using instance_place or instance_position can you obtain the id of the collided object, and then, as his example shows, store the id in a local variable, and then refer to it in order to access that particular instance.

 

Thank you!!

I understand the logic behind that and I'm checking out your guides for newbie, really thank you guys!!