[REVOLVER]Need a method; Algorithm provided

[HarryE]

Well, actually I need two, BUT THEY ARE VERY SIMILAR. They must be written for RPG Maker XP.

I'm afraid I don't know RGSS, but I do know how programming works, so I am able to provide the algorithms necessary in pseudocode.

Baisically, the first method, takes a value n, calculates X and Y distance between a method and the player, and will return TRUE if the player is within n the modulus of X and Y distance of the event (I am aware that this will form a square, but I'm okay with that)(Modulus, in case you don't know, is the positive value, so 1 is one and -1 is 1. Don't confuse with MOD, ie %). So the method call will have three inputs, the X and Y of a method and value n. I will be using this in the Conditional Branch of RMXP.

The second method is exactly the same, except that the X and Y values of the event are added together before comparing it to n, thus forming a Diamond area of detection. It'll make more sense once you look at the pseudocode.

Spoiler: Pseudocode

Square Algorithm;

Square(Event, n){

  Return((|Player.X-Event.X|>= n )AND((|Player.Y-Event.Y|>= n ));

}

Diamond Algorithm;

Diamond(Event, n){

  Return(( |Player.X-Event.X| + |Player.Y-Event.Y| ) >= n);

}

Thankyou very much :D

 

[Brewmeister]

Try this...

Spoiler: Pseudocode

Square Algorithm;

def square(event_x, event_y, n)

  return ($game_player.x - event_x).abs <= n  and ($game_player.y - event_y).abs <= n

end

Diamond Algorithm;

def diamond(event_x, event_y, n)

  return ($game_player.x - event_x).abs + ($game_player.y - event_y).abs <= n)

end

 

[HarryE]

Nice, thanks. Now how do I call it? Sorry to be an ignorant pain. I need to get round to learning this shit. :P

 

[Brewmeister]

I would just put them in a module, so...

module WITHIN_RANGE

  def self.square(event_x, event_y, n)

    return (($game_player.x - event_x).abs <= n  and ($game_player.y - event_y).abs <= n)

  end

 

  def self.diamond(event_x, event_y, n)

    return (($game_player.x - event_x).abs + ($game_player.y - event_y).abs <= n)

  end

end

then use... (event commands)

Control Variables: [0001] = This event's Map X
Control Variables: [0002] = This event's Map Y
Conditional Branch: Script: RANGE::square($game_variables[1], $game_variables[2], 5)
<whatever happens here>
:Branch End
Wait: 4 frame(s)

change the '5' to the range you want

 

[HarryE]

Isn't there a shortcut way, in the script call, to use the same X and Y values as the event that's calling it? Or am I making that up?

Also, It's giving me a syntax Error on Line 3...

EDIT: Nevermind, fixed it. The code was missing some brakets, but maybe that's cause you edited my pseudocode and I left out some brackets or summat...

 

[Brewmeister]

yep, I did. :scruff: I fixed the code above too.

I also changed the module name, after I remembered there's already a RANGE module (for arrays)

I'd also put a 'wait' of at least 4 frames to reduce lag. (it takes at least 4 frames to move one tile)

[edit] You could use $game_map.events[@event_id].x instead of the game variables, so...

WITHIN_RANGE::square($game_map.events[@event_id].x, $game_map.events[@event_id].y, 3)

then you don't need to set the game variables

 

[HarryE]

Yes, it works perfectly now! Thankyou very much for the help, Brewmeister!

 

[Brewmeister]

We should have done this on IRC...

I forgot the self. in front of the module methods.

Be Well