13 replies to this topic

[thegame]

All objects have a unique instance ID, starting at 100000 or something and going up one every time an object is placed in the room editor, or created with instance_create, but not going back down and filling in holes where objects were deleted.
In the event where you switch the instance (a key press event?), do this

var otherSwitch = collision_rectangle(x,y,bbox_right, bbox_bottom, obj_switch, true, true);
if(otherSwitch)
  otherSwitch.activated = !otherSwitch.activated;

collision_rectangle returns the collided instance's ID, and an ID can be used just the same way as an object's index but only affecting the specific instance rather than all of them.
I believe if its in a collision event, you can just use the keyword other for the same effect, but won't be toggle-able without checking for a keypress:

other.activated = true;
/*OR DO THIS*/
if(keyboard_check_pressed(vk_space))
  other.activated = !other.activated;

[Mr Game]

Do you want a precise code, or just an idea how to do?

[Caracol]

Here's an option you can do with just drag-and-drop:

Every time a switch is flipped, add +1 to a variable in the DOOR object (the one that opens when all the switches are flipped). Call it num_switches_flipped or something.

In the door object, use the "Test Instance Count" on the switch object (to see how many switches are in the room) and compare it to num_switches_flipped. If they are equal, the door opens.

This way is a little simpler and a one-size-fits-all for every room.

[thegame]

@Caracol - It is no more one-size-fits all than any other method...

You can check the same thing like this with code

var i;
with(obj_switch) {
  if(activated)
    other.i += 1;
}
if(i == instance_count(obj_switch)) {
  //Open door
}

[iam1me]

Here's an alternate, generic, solution:

define_Switch():

{
   if(!variable_global_exists("Switch"))
   {
      globalvar Switch;
      Switch = object_add();
      object_event_add(Switch,ev_create,0,"create_Switch();");
   }
}

create_Switch():

{
   state = 0; 
   action_script = -1; //id of script to execute when switch is toggled
}

toggle_Switch():

{
   if(action_script != -1) script_execute(action_script); 
}

Then create several instances and set their action_script = room0_OnToggle; *NOTE: do not put () at the end - you aren't calling the script here but giving a ref to it. Then write the room0_OnToggle script...

room0_OnToggle():

{
   if(switch_0.state == 0) exit;
   if(switch_1.state == 0) exit;
  ...

   //if it reaches this point, all switches have been flipped.
   open_door(); //replace with relevant code
}

This is a more generic solution, so you should be able to apply it to many different situations with ease.

[Caracol]

@Caracol - It is no more one-size-fits all than any other method...

Yeah, I was assuming he wanted a drag-and-drop method, my comment was meant to say "it's still one-size-fits-all even though it doesn't use GML".

Anyway, if you want to use GML, it'll be slicker and better in the long run. More power to you!

[thegame]

if(obj_CHAR.swACTIVATE && place_meeting(x,y,obj_CHAR)) {

    swON=1;

    obj_SWITCH.image_index=1;

    obj_SWITCH.image_speed=0;

}

[thegame]

if(obj_CHAR.swACTIVATE && place_meeting(x,y,obj_CHAR)) {
    swON=1;
    image_index=1;
    image_speed=0;
}

You were setting it for all of the switches... that's what was wrong
Putting obj_name.var_name will change var_name's value in all instances obj_name

Edited by thegame, 11 February 2012 - 04:34 PM.