Obtaining Event ID based on x and y coordinates?

[death by moogles]

Is it possible to set two variables, one for x and one for y, and then find the event id of the event at the location specified by the x and y coordinates? There was a feature like this in rm2k3, but it seems to have been lost in XP.

Thanks :D!

 

[Atoa]

you could try this:

if [$game_map.events[ID].x, $game_map.events[ID].y] == [Value X, Value Y]

Ex.:
i want to check if event ID 12 in on coordinate 25 x 13

if [$game_map.events[10].x, $game_map.events[10].y] == [25, 13]

(if you use the command "script" on an event conditional branch, don't add the "if" on the begin)

 

[silver wind]

only by script, I believe.
[rgss]class Interpreter
  def event_at(x,y)
    for key in $game_map.events.keys
      event = $game_map.events[key]
      if (event.x==x and event.y==y)
        return event.id
      end
    end
    # if no event is at x,y
    return nil
  end
end
[/rgss]
^ should work in theory. do: $game_variables = event_at(x,y)
to save the event ID in variable number #i

Edit: shoot Atoa beat me to it :p

 

[death by moogles]

you could try this:

if [$game_map.events[ID].x, $game_map.events[ID].y] == [Value X, Value Y]

Ex.:
i want to check if event ID 12 in on coordinate 25 x 13

if [$game_map.events[10].x, $game_map.events[10].y] == [25, 13]

(if you use the command "script" on an event conditional branch, don't add the "if" on the begin)

This works, but I need to be able to do this in reverse. I need to be able to define the coordinates and determine which event is at those coordinates.

only by script, I believe.
[rgss]class Interpreter
  def event_at(x,y)
    for key in $game_map.events.keys
      event = $game_map.events[key]
      if (event.x==x and event.y==y)
        return event.id
      end
    end
    # if no event is at x,y
    return nil
  end
end
[/rgss]
^ should work in theory. do: $game_variables = event_at(x,y)
to save the event ID in variable number #i

Edit: shoot Atoa beat me to it :p

This is exactly what I'm looking for, but is there any way for me to be able to set x and y to two game variables? I've tried a few things, but I don't seem to have enough space within the script box in an event to define x and y as game variables. Of course, I'm not even sure if it would work. This is what I tried:

$game_variables[3] = event_at($game_variables[1],$game_variables[2])

But the script box breaks it up into:

$game_variables[3] = event_at

($game_variables[1],

$game_variables[2])

So I get syntax errors. Thanks for all of the help so far. Sorry that I don't know what I'm doing. I'm learning albeit slowly.

 

[silver wind]

silly Enterbrain.. why do a tiny script box..
try
x=$game_variables[1]
y=$game_variables[2]
$game_variables[3] = event_at(x,y)

 

[death by moogles]

Ah, okay! It works perfectly, and it isn't complex at all.

Thank you very much, both of you!

EDIT: I'm having a somewhat unrelated issue, but it's also somewhat related, so I figured I'd just ask here instead of starting a new thread. It's based upon that exact same issue that I was just having; the script box is too small!

Anyway, I'm attempting to determine the event id of event1, whose coordinates are set to variables 38(x) and 39, after which I want to turn event1's A switch on. This is what I have:

x=$game_variables[38]

y=$game_variables[39]

$game_variables[37] = event_at(x,y)

And then, in a separate script box:

key = [$game_variables[27], $game_variables[37], 'A']

  $game_self_switches[key] = true

  $game_map.need_refresh = true

Note: Variable 27 stores the current map id.

However, the second script box is actually displayed like this, because it's so small:

key = [$game_variables[27],

$game_variables[37], 'A']

  $game_self_switches[key] = true

  $game_map.need_refresh = true

Seeing as how it doesn't work, I'm assuming that the tiny script box has broken my script again. Does anyone know of a work-around that I could use?

EDIT2: Got it! There was a conflicting event that I made days ago on the same map :|

Thanks, everyone :3

EDIT3: Just thought that I'd let you know that I found a wonderful use for your suggestion too, Atoa :3