Variable Encounter Rate

[Mystinar]

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Normally, when RMXP selects an enemy troop for you to fight, it just selects a random troop. However, under this system modification, each troop has a different chance of being fought. To implement this system, do the following:


Add this method to the end of Game_Map:

Code:

def rand_encounter
    troops = @map.encounter_list.clone
    count = 0
    a = []
    b = []
    num = 1
    rate = 0
    x = 0
    y = 0
    z = 0
    #Generate table
    for i in troops
      if troops[i-1] == nil
        break
      end
      z = $data_troops[troops[i-1]]
      x = z.name[0].to_i
      y = z.name[1].to_i
      if x != 0
        rate = (x * 10) + y
      else
        rate = y
      end
      a[i] = count + 1
      b[i] = count + rate
      count += rate
    end
    #generate random number
    srand()
    num += rand(count)
    #check table and return results
    for i in troops
      if num >= a[i] and num <= b[i]
        return troops[i-1]
      end
    end
  end

After that, goto the Update method in Scene_Map, and find this if...then nest:

Code:

if $game_player.encounter_count == 0 and $game_map.encounter_list != []
      [...]
    end

and replace it with this:

Code:

if $game_player.encounter_count == 0 and $game_map.encounter_list != []
      # If event is running or encounter is not forbidden
      unless $game_system.map_interpreter.running? or
             $game_system.encounter_disabled
        # Confirm troop
        troop_id = $game_map.rand_encounter
        # If troop is valid
        if $data_troops[troop_id] != nil
          # Set battle calling flag
          $game_temp.battle_calling = true
          $game_temp.battle_troop_id = troop_id
          $game_temp.battle_can_escape = true
          $game_temp.battle_can_lose = false
          $game_temp.battle_proc = nil
        end
      end
    end

And then your done, sort of. To get each enemy troop a different encounter rate, place a two-digit number, from 01 to 99, in front of each troop's name. This number will determine how frequently the troop will be fought.


Example:

04 Ghost
02 Ghost*2
01 Ghost*3

In this example, the ghost troops have encounter rates of 4, 2, and 1, respectively. The troop with a single ghost is the most likely to appear, while the troop with 3 ghosts is the least likely to appear. The system adds those numbers up, generates a random number within that range, and then determines which troop to fight by comparing the number to a table with the selection range of each troop:

Troop 1: 1~4
Troop 2: 5~6
Trppp 3: 7

If the script generated a three, then troop one would be fought. But a 7 would mean troop 3 would be fought.

Hopefully, you find it useful. Let me know if you find any bugs.